Ecohydrology & Hydrobiology最新文献_第10页

Multimetric trophic status and harmful algal species in a harbor area of the Amazon Macrotidal Mangrove Coast 亚马逊大潮红树林海岸港区多指标营养状况及有害藻类

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-10-28 DOI: 10.1016/j.ecohyd.2024.10.002

Jordana Adorno Furtado , Lisana Furtado Cavalcanti-Lima , Vinicius Henrique Maciel dos Santos , Jefferson Horley Feitosa Serejo , Luci Cajueiro Carneiro Pereira , Raimunda Nonata Fortes Carvalho-Neta , Ligia Tchaicka

Inserted in a region known as the Amazon Macrotidal Mangrove Coast (AMMC), the São Marcos Estuarine Complex (SMEC) has presented a scenario of continuous contamination caused mainly by the discharge of domestic, agricultural, and port sewage. Therefore, this study aims to be the first to determine the trophic state of SMEC, assess the ecological status of the phytoplankton community, and apply additive models to investigate the main environmental parameters that drive phytoplankton. Collections were carried out during the dry season (September and December/2018) and the rainy season (March and June/2019). Seasonal influence on environmental and biological factors was observed, especially those used to classify water quality. Based on the Multimetric Trophic Index (TRIX), SMEC was classified as eutrophic, and the general nutritional status of phytoplankton revealed that the system was predominantly nitrogen-limited. The phytoplankton community was dominated by diatoms, with emphasis on the presence of potentially harmful species such as Pseudo-nitzschia pungens, Coscinodiscus centralis, Thalassiosira subtilis and Skeletonema costatum, which can cause ecological and economic losses in the environment. Such species contributed to the low diversity and moderate richness. Hydrological variables such as temperature, salinity, and turbidity, in addition to nutrients, especially nitrate and phosphate, were the main parameters controlling phytoplankton structure and abundance, revealing an indicator community well adapted to local conditions. Overall, the integrated study of trophic and ecological indices in the SMEC appeared to be sensitive to changes in water quality, being an efficient tool to indicate the current scenario of this environment.

位于亚马逊大潮红树林海岸（AMMC）的奥马科斯河口综合体（SMEC）呈现出主要由家庭、农业和港口污水排放造成的持续污染情景。因此，本研究旨在首次确定SMEC的营养状态，评估浮游植物群落的生态状况，并应用加性模型研究驱动浮游植物的主要环境参数。收集工作在旱季（2018年9月和12月）和雨季（2019年3月和6月）进行。观察到季节对环境和生物因素的影响，特别是用于水质分类的因素。根据多指标营养指数（TRIX）， SMEC被划分为富营养化，浮游植物的总体营养状况显示该系统以氮限制为主。浮游植物群落以硅藻为主，并有潜在的有害物种，如pseudonitzschia pungens、Coscinodiscus centralis、thalassisira subtilis和Skeletonema costatum等，对环境造成生态和经济损失。这些物种的多样性较低，丰富度中等。温度、盐度、浊度等水文变量以及营养物质（尤其是硝酸盐和磷酸盐）是控制浮游植物结构和丰度的主要参数，揭示了一个适应当地条件的指示群落。综上所述，生态和营养指标的综合研究对水质变化较为敏感，是反映该环境现状的有效工具。

{"title":"Multimetric trophic status and harmful algal species in a harbor area of the Amazon Macrotidal Mangrove Coast","authors":"Jordana Adorno Furtado , Lisana Furtado Cavalcanti-Lima , Vinicius Henrique Maciel dos Santos , Jefferson Horley Feitosa Serejo , Luci Cajueiro Carneiro Pereira , Raimunda Nonata Fortes Carvalho-Neta , Ligia Tchaicka","doi":"10.1016/j.ecohyd.2024.10.002","DOIUrl":"10.1016/j.ecohyd.2024.10.002","url":null,"abstract":"<div><div>Inserted in a region known as the Amazon Macrotidal Mangrove Coast (AMMC), the São Marcos Estuarine Complex (SMEC) has presented a scenario of continuous contamination caused mainly by the discharge of domestic, agricultural, and port sewage. Therefore, this study aims to be the first to determine the trophic state of SMEC, assess the ecological status of the phytoplankton community, and apply additive models to investigate the main environmental parameters that drive phytoplankton. Collections were carried out during the dry season (September and December/2018) and the rainy season (March and June/2019). Seasonal influence on environmental and biological factors was observed, especially those used to classify water quality. Based on the Multimetric Trophic Index (TRIX), SMEC was classified as eutrophic, and the general nutritional status of phytoplankton revealed that the system was predominantly nitrogen-limited. The phytoplankton community was dominated by diatoms, with emphasis on the presence of potentially harmful species such as <em>Pseudo-nitzschia pungens, Coscinodiscus centralis, Thalassiosira subtilis</em> and <em>Skeletonema costatum</em>, which can cause ecological and economic losses in the environment. Such species contributed to the low diversity and moderate richness. Hydrological variables such as temperature, salinity, and turbidity, in addition to nutrients, especially nitrate and phosphate, were the main parameters controlling phytoplankton structure and abundance, revealing an indicator community well adapted to local conditions. Overall, the integrated study of trophic and ecological indices in the SMEC appeared to be sensitive to changes in water quality, being an efficient tool to indicate the current scenario of this environment.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 618-631"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895655","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Odonata in the brazilian Cerrado: Influence of environmental and spatial factors on dragonfly and damselfly assemblages 巴西塞拉多的蜻蜓：环境和空间因素对蜻蜓和豆娘组合的影响

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-09-02 DOI: 10.1016/j.ecohyd.2024.08.003

Carolina Gomes Viana , Lucas Pereira-Moura , Amanda Frederico Mortati , Leandro Juen , Daniel Silas Veras

Environmental and spatial variables can act as filters in species distribution, thereby structuring biological communities. Our study aims to analyze the effects of environmental and spatial factors on the structuring of Odonata assemblages in Cerrado. Testing the hypotheses: (1) the structuring of Odonata larvae and adult assemblages is more influenced by the environment than by space; and (2) the structuring of larvae and adult assemblages of the suborder Anisoptera is more influenced by the environment, while Zygoptera is more influenced by space. We measured physicochemical variables (dissolved oxygen, pH, conductivity and temperature) and Habitat Integrity Index. Data analysis involved the coverage-based rarefaction and extrapolation method, Partial Redundancy Analysis (RDAp), and Principal Coordinates of Neighbor Matrices. Thirteen streams were sampled, collecting 1204 specimens. The sampling effort for larvae showed an efficiency of 98 %, and for adults, 85 %. According to RDAp, the composition for larvae was explained solely by environmental factors, while for adults, there was an explanation by the environment for Anisoptera and by both environmental and spatial factors for the order and Zygoptera. The results highlight the joint influence of environmental and spatial factors on the configuration of adult and larval Odonata assemblages in Cerrado streams. A variety of responses, each corresponding to the specific object of analysis, is evident, driven by divergent eco-physiological characteristics among suborders. These nuances reflect the inherent complexity of the ecology of these aquatic insects, emphasizing the importance of considering both environmental and spatial factors when investigating the dynamics of Odonata communities at different developmental stages.

环境和空间变量可以作为物种分布的过滤器，从而构建生物群落。本研究旨在分析环境和空间因素对塞拉多地区蛇目动物组合结构的影响。结果表明：(1)环境对蛾类幼虫和成虫群落结构的影响大于空间对幼虫和成虫群落结构的影响；(2)异翅目幼虫和成虫组合结构受环境影响较大，而夜翅目幼虫和成虫组合结构受空间影响较大。我们测量了理化变量（溶解氧、pH、电导率和温度）和生境完整性指数。数据分析包括基于覆盖的稀疏和外推方法、部分冗余分析（RDAp）和邻居矩阵主坐标。对13条溪流进行采样，收集标本1204份。幼虫和成虫的取样效率分别为98%和85%。根据RDAp，幼虫的组成完全受环境因素的影响，而成虫的组成对无翅目有环境因素的影响，对目和夜翅目有环境和空间因素的影响。研究结果强调了环境和空间因素对塞拉多河流中成虫和幼虫组合的共同影响。由于亚目之间不同的生态生理特征的驱动，各种各样的响应，每个对应于特定的分析对象，是显而易见的。这些细微差别反映了这些水生昆虫生态的内在复杂性，强调了在研究不同发育阶段的水虻群落动态时考虑环境和空间因素的重要性。

{"title":"Odonata in the brazilian Cerrado: Influence of environmental and spatial factors on dragonfly and damselfly assemblages","authors":"Carolina Gomes Viana , Lucas Pereira-Moura , Amanda Frederico Mortati , Leandro Juen , Daniel Silas Veras","doi":"10.1016/j.ecohyd.2024.08.003","DOIUrl":"10.1016/j.ecohyd.2024.08.003","url":null,"abstract":"<div><div><span><span>Environmental and spatial variables can act as filters in species distribution, thereby structuring biological communities. Our study aims to analyze the effects of environmental and spatial factors on the structuring of Odonata assemblages in </span>Cerrado. Testing the hypotheses: (1) the structuring of Odonata larvae and adult assemblages is more influenced by the environment than by space; and (2) the structuring of larvae and adult assemblages of the suborder Anisoptera is more influenced by the environment, while </span>Zygoptera<span> is more influenced by space. We measured physicochemical variables (dissolved oxygen, pH, conductivity and temperature) and Habitat Integrity Index. Data analysis involved the coverage-based rarefaction and extrapolation method, Partial Redundancy Analysis (RDAp), and Principal Coordinates of Neighbor Matrices. Thirteen streams were sampled, collecting 1204 specimens. The sampling effort for larvae showed an efficiency of 98 %, and for adults, 85 %. According to RDAp, the composition for larvae was explained solely by environmental factors, while for adults, there was an explanation by the environment for Anisoptera and by both environmental and spatial factors for the order and Zygoptera. The results highlight the joint influence of environmental and spatial factors on the configuration of adult and larval Odonata assemblages in Cerrado streams. A variety of responses, each corresponding to the specific object of analysis, is evident, driven by divergent eco-physiological characteristics among suborders. These nuances reflect the inherent complexity of the ecology of these aquatic insects, emphasizing the importance of considering both environmental and spatial factors when investigating the dynamics of Odonata communities at different developmental stages.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 502-510"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bacterial diversity and function prediction of sediments in downstream of Huaihe River 淮河下游沉积物细菌多样性及其功能预测

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2025-01-06 DOI: 10.1016/j.ecohyd.2024.12.006

Jiao Yue, Dongpeng Zhang, Miaomiao Cao, Yukui Li, Qianwen Liang, Fei Liu, YuQiang Dong

There are few reports on the bacterial communities and functions of sediments in Huaihe River. Herein, the structure and functions of sediment bacterial communities in the Anlan Wharf (AL), Bengbu Gate (BZ) and Mohe Estuary (MH) of the Huaihe River Basin were comparatively analyzed using 16S rRNA high-throughput sequencing. The richness and diversity of bacterial communities significantly differed among different watersheds of Huaihe River. Alpha diversity analysis showed that the magnitude of diversity index and richness index of each sampling site ranked in the order of AL > BZ > MH. The bacterial communities in the Huaihe River Basin are dominated by Pseudomonadota, Chloroflexota, Nitrospirota and Bacteroidota at the phylum level, and by Gammaproteobacteria and Deltaproteobacteria at the class level. The sediment bacterial communities were analyzed on the bacterial community function prediction software PICRUSt. The sediment bacterial functions mainly involve 46 gene functional families, such as vitamin and cofactor metabolism, amino acid metabolism, and biosynthesis of secondary metabolism products. The predicted gene copy numbers of the gene function families rank as AL > MH > BZ. This study reveals the structure and function of sediment bacterial communities in different areas of the Huaihe River Basin, and provides scientific basis for subsequent ecological restoration in this basin.

关于淮河沉积物细菌群落及其功能的研究报道较少。本文采用16S rRNA高通量测序技术，对淮河流域安澜码头（AL）、蚌埠门（BZ）和漠河口（MH）沉积物细菌群落结构和功能进行了比较分析。淮河不同流域细菌群落的丰富度和多样性存在显著差异。α多样性分析表明，各样点的多样性指数和丰富度指数大小依次为AL >； BZ >； MH。淮河流域细菌群落在门水平上以假单胞菌门、绿氟菌门、亚硝化螺旋体门和拟杆菌门为主，在类水平上以γ变形菌门和三角洲变形菌门为主。利用PICRUSt细菌群落功能预测软件对沉积物细菌群落进行分析。沉积物细菌功能主要涉及维生素及辅助因子代谢、氨基酸代谢、次生代谢产物生物合成等46个基因功能家族。基因功能家族的预测基因拷贝数为AL >； MH >； BZ。本研究揭示了淮河流域不同区域沉积物细菌群落的结构和功能，为该流域后续生态修复提供科学依据。

{"title":"Bacterial diversity and function prediction of sediments in downstream of Huaihe River","authors":"Jiao Yue, Dongpeng Zhang, Miaomiao Cao, Yukui Li, Qianwen Liang, Fei Liu, YuQiang Dong","doi":"10.1016/j.ecohyd.2024.12.006","DOIUrl":"10.1016/j.ecohyd.2024.12.006","url":null,"abstract":"<div><div><span><span>There are few reports on the bacterial communities<span><span><span> and functions of sediments in Huaihe River. Herein, the structure and functions of sediment bacterial communities in the Anlan Wharf (AL), Bengbu Gate (BZ) and Mohe Estuary (MH) of the Huaihe River Basin were comparatively analyzed using </span>16S rRNA high-throughput sequencing. The richness and diversity of bacterial communities significantly differed among different watersheds of Huaihe River. Alpha diversity analysis showed that the magnitude of diversity index and richness index of each sampling site ranked in the order of AL > BZ > MH. The bacterial communities in the Huaihe River Basin are dominated by Pseudomonadota, Chloroflexota, Nitrospirota and Bacteroidota at the phylum level, and by </span>Gammaproteobacteria and </span></span>Deltaproteobacteria at the class level. The sediment bacterial communities were analyzed on the bacterial community function prediction software PICRUSt. The sediment bacterial functions mainly involve 46 gene functional families, such as vitamin and cofactor metabolism, </span>amino acid metabolism<span><span>, and biosynthesis<span> of secondary metabolism products. The predicted gene copy numbers of the gene function families rank as AL > MH > BZ. This study reveals the structure and function of sediment bacterial communities in different areas of the Huaihe River Basin, and provides scientific basis for subsequent </span></span>ecological restoration in this basin.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 756-762"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895729","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Anion exchange resin installation in reducing nitrate nitrogen and phosphate phosphorus concentrations: The backwater of Turawa reservoir, Poland case study 阴离子交换树脂装置在降低硝酸盐氮和磷酸磷浓度中的应用：波兰图拉瓦水库回水案例研究

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-12-26 DOI: 10.1016/j.ecohyd.2024.12.003

Łukasz Gruss , Piotr Cyganowski , Paweł Tomczyk , Mirosław Wiatkowski , Robert Kasperek , Krzysztof Pulikowski , Czesława Rosik-Dulewska , Sebastian Kinas , Witold Skorulski

Eutrophication severely impacts water quality, impeding tourism, recreation, and rendering it unfit for consumption, swimming, and fishing. To address this challenge, innovative methods for nutrient inactivation in lakes and reservoirs are imperative in restoring surface water. In this context, we investigated whether the technology based on ion exchange (IX) resins can decrease the concentrations of nitrate-nitrogen (NO₃-N) and phosphate-phosphorus (PO₄-P) in the water in the vicinity of the anion exchange resin installation located in the backwater area of a reservoir. The Anion Exchange Resin Installation will be referred to as the Water Quality Improvement Installation (WQII) in this article. We also aimed to identify the factors that affect water quality in the water in the vicinity of the WQII area. Our research area was the Turawa eutrophic reservoir located in south-western Poland (Central Europe). Our results indicate that the WQII effectively lowers the concentrations of NO₃-N and PO₄-P in the tested water. Environmental factors have negligible influence on NO₃-N and PO₄-P concentrations in the water in the vicinity of the WQII. An inversely proportional relationship between the removal of NO₃-N and PO₄-P indicates that the configuration of the regeneration system of each column is appropriate. The WQII effectively decreases NO₃-N and PO₄-P concentrations during periods of cyanobacterial blooms in the backwater area of the reservoir. This novel WQII utilizing IX technology, emerges as a promising solution for remediating eutrophic water aligning with the Water Framework Directive, assuming the achievement of good water status of water bodies.

富营养化严重影响水质，阻碍旅游、娱乐，使其不适合消费、游泳和捕鱼。为了应对这一挑战，在湖泊和水库中采用创新的营养失活方法来恢复地表水是必不可少的。在此背景下，我们研究了基于离子交换（IX）树脂的技术是否可以降低位于水库回水区的阴离子交换树脂装置附近水中硝酸盐氮（NO3-N）和磷酸盐磷（PO4-P）的浓度。阴离子交换树脂装置将在本文中称为水质改善装置（WQII）。我们亦旨在找出影响湾仔第三期工程附近水域水质的因素。我们的研究区域是位于波兰西南部（中欧）的图拉瓦富营养化水库。结果表明，WQII可有效降低水体中NO3-N和PO4-P的浓度。环境因子对WQII附近水体NO3-N和PO4-P浓度的影响可以忽略不计。NO3-N去除率与PO4-P去除率呈反比关系，说明各塔再生系统的配置是合适的。WQII能有效降低水库回水区蓝藻繁殖期间NO3-N和PO4-P浓度。这种新颖的WQII利用IX技术，成为修复富营养化水体的有希望的解决方案，与水框架指令一致，假设水体达到良好的水状态。

{"title":"Anion exchange resin installation in reducing nitrate nitrogen and phosphate phosphorus concentrations: The backwater of Turawa reservoir, Poland case study","authors":"Łukasz Gruss , Piotr Cyganowski , Paweł Tomczyk , Mirosław Wiatkowski , Robert Kasperek , Krzysztof Pulikowski , Czesława Rosik-Dulewska , Sebastian Kinas , Witold Skorulski","doi":"10.1016/j.ecohyd.2024.12.003","DOIUrl":"10.1016/j.ecohyd.2024.12.003","url":null,"abstract":"<div><div>Eutrophication severely impacts water quality, impeding tourism, recreation, and rendering it unfit for consumption, swimming, and fishing. To address this challenge, innovative methods for nutrient inactivation in lakes and reservoirs are imperative in restoring surface water. In this context, we investigated whether the technology based on ion exchange (IX) resins can decrease the concentrations of nitrate-nitrogen (NO<sub>3</sub>-N) and phosphate-phosphorus (PO<sub>4</sub>-P) in the water in the vicinity of the anion exchange resin installation located in the backwater area of a reservoir. The Anion Exchange Resin Installation will be referred to as the Water Quality Improvement Installation (WQII) in this article. We also aimed to identify the factors that affect water quality in the water in the vicinity of the WQII area. Our research area was the Turawa eutrophic reservoir located in south-western Poland (Central Europe). Our results indicate that the WQII effectively lowers the concentrations of NO<sub>3</sub>-N and PO<sub>4</sub>-P in the tested water. Environmental factors have negligible influence on NO<sub>3</sub>-N and PO<sub>4</sub>-P concentrations in the water in the vicinity of the WQII. An inversely proportional relationship between the removal of NO<sub>3</sub>-N and PO<sub>4</sub>-P indicates that the configuration of the regeneration system of each column is appropriate. The WQII effectively decreases NO<sub>3</sub>-N and PO<sub>4</sub>-P concentrations during periods of cyanobacterial blooms in the backwater area of the reservoir. This novel WQII utilizing IX technology, emerges as a promising solution for remediating eutrophic water aligning with the Water Framework Directive, assuming the achievement of good water status of water bodies.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 718-732"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895726","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Drivers of local contribution to beta diversity of fish communities in a tropical river basin of Indian Deccan Plateau 印度德干高原热带河流流域鱼类群落β多样性本地贡献的驱动因素

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-11-26 DOI: 10.1016/j.ecohyd.2024.11.002

Arvind Kumar Dwivedi , Kritish De

Ecological studies help us understand the influence of environmental factors in shaping the spatial structure of biological communities. Beta diversity examines variations in community composition across habitats and provides crucial insights into the factors contributing to these variations. The local contribution to beta diversity (LCBD) measures the variance in total species composition and sheds light on the drivers of beta diversity. In this study, we examined the relationship between LCBD and species richness, identified the environmental factors (bioclimatic and geographic) influencing the species richness and LCBD of the fish community in the Bhima River basin of the Indian Deccan Plateau. We observed that the precipitation and diurnal anisotropic heat index had significant effects on species richness. We observed a negative relationship between LCBD and species richness and found that annual precipitation, precipitation seasonality and precipitation in driest and warmest seasons were the important factors influencing LCBD in the fish community of the Bhima River basin. Impoundment by dams and extensive irrigation have altered the hydrology of the Bhima River basin, causing water shortages and emphasizing the importance of elevation and dry-season water availability in shaping the community composition. We recommend further research to estimate population structure, examine the impact of exotic species, identify species with limited distribution ranges, and assess the influence of climate change for the proper conservation and management of the ichthyofaunal resources in the Bhima River basin.

生态学研究有助于我们了解环境因素对生物群落空间结构形成的影响。Beta多样性研究了不同生境中群落组成的变化，并对导致这些变化的因素提供了重要的见解。本地对β多样性的贡献（LCBD）衡量了总物种组成的变化，揭示了β多样性的驱动因素。本文研究了印度德干高原比马河流域鱼类群落物种丰富度和LCBD与物种丰富度的关系，确定了影响该流域鱼类群落物种丰富度和LCBD的环境因子（生物气候和地理）。降水量和日各向异性热指数对物种丰富度有显著影响。研究发现，bima河流域鱼类群落LCBD与物种丰富度呈负相关，年降水量、降水季节性和最干暖季降水量是影响LCBD的重要因素。水坝的蓄水和广泛的灌溉改变了Bhima河流域的水文，造成水资源短缺，并强调了海拔高度和旱季水供应在形成社区组成方面的重要性。建议在种群结构估算、外来物种影响评估、有限分布范围物种鉴定和气候变化影响评估等方面进行进一步研究，为bima河流域鱼类资源的合理保护和管理提供依据。

{"title":"Drivers of local contribution to beta diversity of fish communities in a tropical river basin of Indian Deccan Plateau","authors":"Arvind Kumar Dwivedi , Kritish De","doi":"10.1016/j.ecohyd.2024.11.002","DOIUrl":"10.1016/j.ecohyd.2024.11.002","url":null,"abstract":"<div><div><span>Ecological studies help us understand the influence of environmental factors in shaping the spatial structure of biological communities. Beta diversity<span> examines variations in community composition across habitats and provides crucial insights into the factors contributing to these variations. The local contribution to beta diversity (LCBD) measures the variance in total species composition and sheds light on the drivers of beta diversity. In this study, we examined the relationship between LCBD and species richness, identified the environmental factors (bioclimatic and geographic) influencing the species richness and LCBD of the fish community in the Bhima River basin of the Indian Deccan Plateau. We observed that the precipitation and diurnal anisotropic heat index had significant effects on species richness. We observed a negative relationship between LCBD and species richness and found that annual precipitation, precipitation seasonality and precipitation in driest and warmest seasons were the important factors influencing LCBD in the fish community of the Bhima River basin. Impoundment by dams and extensive irrigation have altered the hydrology of the Bhima River basin, causing </span></span>water shortages<span> and emphasizing the importance of elevation and dry-season water availability in shaping the community composition. We recommend further research to estimate population structure, examine the impact of exotic species, identify species with limited distribution ranges, and assess the influence of climate change for the proper conservation and management of the ichthyofaunal resources in the Bhima River basin.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 682-690"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Applicability analysis of different evapotranspiration models for maize farmland in the lower Yellow River Plain based on eddy covariance measurements 基于涡动相关测量的不同蒸散模型在黄河平原下游玉米农田的适用性分析

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-11-09 DOI: 10.1016/j.ecohyd.2024.10.005

Xiaojuan Ren , Guodong Li , Shengyan Ding , Jingyu Wang , Man Zhang , Xuejian Sun , Qingtao Zhao , Pengfei Li

Evapotranspiration is an important part of the hydrological cycle and a key indicator to measure hydrological and energy transfer in the soil-plant-atmosphere continuum. In this study, maize farmland in the lower Yellow River, an important grain production base in China, was selected as the research object. Based on the actual observation data of the eddy covariance measurements during the summer maize growth cycle, two comprehensive models, five radiation-based models and two temperature-based models were evaluated in estimating the applicability of the actual evapotranspiration. Subsequently, the variation in evapotranspiration was analyzed and the contribution of each factor to the evapotranspiration change of summer maize in the growing season was quantified. It could be concluded that the Abtew model based on the radiation method was the most suitable during the whole growth period in the study area, followed by the Makkink model based on the radiation method, while the McCloud model based on the temperature method attained the worst simulation performance. In the early growth stage of summer maize, the Kimberly Penman model and FAO-56 Penman-Monteith model in the comprehensive method showed better simulation performance. As crops grew, the Abtew model in the radiation-based method demonstrated better simulation performance. The solar radiation and net radiation had a strong correlation with evapotranspiration and exhibited a high relative interpretation rate of evapotranspiration. This study plays an important role in the development of efficient water-saving agriculture, irrigation forecasting and sustainable utilization of water resources in the core area of grain production in China.

蒸散发是水循环的重要组成部分，是衡量土壤-植物-大气连续体中水文和能量传递的关键指标。本研究以中国重要的粮食生产基地黄河下游地区的玉米农田为研究对象。利用夏玉米生长周期涡动相关测量的实际观测资料，评价了2种综合模型、5种基于辐射的模型和2种基于温度的模型对夏玉米实际蒸散量的适用性。随后，分析了夏玉米蒸散量的变化，量化了各因子对夏玉米生长季蒸散量变化的贡献。结果表明，基于辐射法的Abtew模型在整个生长期内最适合研究区，其次是基于辐射法的Makkink模型，而基于温度法的McCloud模型模拟效果最差。在夏玉米生长前期，综合方法中的Kimberly Penman模型和FAO-56 Penman- monteith模型的模拟效果较好。随着作物的生长，基于辐射的Abtew模型显示出更好的模拟性能。太阳辐射和净辐射与蒸散发有较强的相关性，对蒸散发具有较高的相对解释率。本研究对中国粮食生产核心区高效节水农业发展、灌溉预测和水资源可持续利用具有重要意义。

{"title":"Applicability analysis of different evapotranspiration models for maize farmland in the lower Yellow River Plain based on eddy covariance measurements","authors":"Xiaojuan Ren , Guodong Li , Shengyan Ding , Jingyu Wang , Man Zhang , Xuejian Sun , Qingtao Zhao , Pengfei Li","doi":"10.1016/j.ecohyd.2024.10.005","DOIUrl":"10.1016/j.ecohyd.2024.10.005","url":null,"abstract":"<div><div><span>Evapotranspiration is an important part of the </span>hydrological cycle<span><span> and a key indicator to measure hydrological and energy transfer in the soil-plant-atmosphere continuum. In this study, maize farmland in the lower Yellow River, an important grain production base in China, was selected as the research object. Based on the actual observation data of the eddy covariance measurements during the summer maize growth cycle, two comprehensive models, five radiation-based models and two temperature-based models were evaluated in estimating the applicability of the actual evapotranspiration. Subsequently, the variation in evapotranspiration was analyzed and the contribution of each factor to the evapotranspiration change of summer maize in the </span>growing season<span> was quantified. It could be concluded that the Abtew model based on the radiation method was the most suitable during the whole growth period in the study area, followed by the Makkink model based on the radiation method, while the McCloud model based on the temperature method attained the worst simulation performance. In the early growth stage of summer maize, the Kimberly Penman model and FAO-56 Penman-Monteith model in the comprehensive method showed better simulation performance. As crops grew, the Abtew model in the radiation-based method demonstrated better simulation performance. The solar radiation and net radiation had a strong correlation with evapotranspiration and exhibited a high relative interpretation rate of evapotranspiration. This study plays an important role in the development of efficient water-saving agriculture<span>, irrigation forecasting and sustainable utilization of water resources in the core area of grain production in China.</span></span></span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 654-667"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895798","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alteration on water balance condition as adaptation measure of climate change in tropical peatlands 热带泥炭地水平衡状况变化对气候变化的适应措施

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-10-11 DOI: 10.1016/j.ecohyd.2024.09.004

Nilna Amal , Rachmad Jayadi , Koichiro Ohgushi , Tjut Sugandawaty Djohan

The vulnerability of peatland water storage function to climate change is a pressing issue that demands immediate attention. While climate change has been extensively studied in tropic, subtropic, and non-peatland areas, its specific impact on tropical peatland areas remains largely unexplored. This study, which focused on specific regions of tropical peatlands, aims to fill this crucial gap in our understanding. By evaluating changes in peatland hydrological characteristics with fluctuations in rainfall trends over several years (2040–2059), we can verify climate change's effect on water availability, especially the difference in land use, at two peatland locations, Sei Hiu and Bagan Melibur, in Riau Province, Indonesia. The three scenarios of climate models under RCP 4.5 and RCP 8.5 that are MPI-ESM-LR, MPI-ESM-MR, and MRI-CGCM3 in CMIP5 were developed. The correlation between rainfall measured in the field and the model output is quite significant, making it suitable for predicting future rainfall. Meanwhile, a similar trend in future water balance was estimated for both locations. Besides, the differences in soil and land use changes, especially in canal properties indicated by runoff coefficients, caused different patterns of changes in water storage. Higher rainfall intensity will likely increase water storage and surpluses in both areas to over 100 %. However, during particular months with low rainfall, water storage was bound to decrease, especially at the Sei Hiu in July, and this decline tended to occur more than twice. Results also showed that models in the same area yield more notable differences compared to similar scenarios in different areas. It was then concluded that the regions had a more significant influence than the model.

泥炭地蓄水功能对气候变化的脆弱性是一个迫切需要关注的问题。虽然气候变化已经在热带、亚热带和非泥炭地地区得到了广泛的研究，但其对热带泥炭地地区的具体影响在很大程度上仍未被探索。这项研究的重点是热带泥炭地的特定区域，旨在填补我们理解中的这一关键空白。通过评估数年（2040-2059年）泥炭地水文特征随降雨趋势波动的变化，我们可以验证气候变化对印度尼西亚廖内省两个泥炭地地点（Sei Hiu和Bagan Melibur）的水可用性的影响，特别是土地利用差异。建立了rcp4.5和rcp8.5下的3个情景气候模式，即CMIP5中的MPI-ESM-LR、MPI-ESM-MR和MRI-CGCM3。野外实测降雨量与模型输出之间的相关性非常显著，适合于预测未来降雨量。同时，估计这两个地点未来的水平衡趋势相似。此外，土壤和土地利用变化的差异，特别是径流系数所反映的渠道性质的差异，导致了不同类型的蓄水量变化。更高的降雨强度可能会使这两个地区的储水量和剩余水量增加到100%以上。然而，在降雨较少的特定月份，储水量必然会减少，特别是在7月的Sei Hiu，而且这种减少往往会发生两次以上。结果还表明，同一地区的模型比不同地区的相似情景产生更显著的差异。然后得出结论，区域的影响比模型的影响更显著。

{"title":"Alteration on water balance condition as adaptation measure of climate change in tropical peatlands","authors":"Nilna Amal , Rachmad Jayadi , Koichiro Ohgushi , Tjut Sugandawaty Djohan","doi":"10.1016/j.ecohyd.2024.09.004","DOIUrl":"10.1016/j.ecohyd.2024.09.004","url":null,"abstract":"<div><div>The vulnerability of peatland<span><span><span><span> water storage function to climate change is a pressing issue that demands immediate attention. While climate change has been extensively studied in tropic, </span>subtropic<span><span>, and non-peatland areas, its specific impact on tropical peatland areas remains largely unexplored. This study, which focused on specific regions of tropical peatlands, aims to fill this crucial gap in our understanding. By evaluating changes in peatland hydrological characteristics with fluctuations in rainfall trends over several years (2040–2059), we can verify climate change's effect on water availability, especially the difference in land use, at two peatland locations, Sei Hiu and Bagan Melibur, in Riau Province, Indonesia. The three scenarios of climate models under RCP 4.5 and RCP 8.5 that are MPI-ESM-LR, MPI-ESM-MR, and MRI-CGCM3 in </span>CMIP5 were developed. The correlation between rainfall measured in the field and the model output is quite significant, making it suitable for predicting future rainfall. Meanwhile, a similar trend in future water balance was estimated for both locations. Besides, the differences in soil and </span></span>land use changes, especially in canal properties indicated by runoff coefficients, caused different patterns of changes in water storage. Higher </span>rainfall intensity will likely increase water storage and surpluses in both areas to over 100 %. However, during particular months with low rainfall, water storage was bound to decrease, especially at the Sei Hiu in July, and this decline tended to occur more than twice. Results also showed that models in the same area yield more notable differences compared to similar scenarios in different areas. It was then concluded that the regions had a more significant influence than the model.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 544-555"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895650","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on water temperature variation trend and disturbance patterns in hydropower development section of the upper Yellow River 黄河上游水电开发段水温变化趋势及扰动模式研究

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-12-19 DOI: 10.1016/j.ecohyd.2024.12.002

Chenxu Zhao, Yuling Liu, Ce Song, Zixuan Yan

The Upper Yellow River hydropower development disrupts natural river water temperature changes. However, there are still gaps in the long-term effects of hydropower development on river water temperatures and disturbance patterns. This study takes the section from Longyangxia reservoir (LYX) to Qingtongxia reservoir (QTX) in the Upper Yellow River as the research object. Based on observations over the past 60 years, the annual, seasonal, and monthly scale changes in river water temperature were explored, and the effects of reservoir operation, temperature, and flow on water temperature were elucidated. The results indicate that the section of the river with the greatest change in water temperature under the influence of reservoir operation is from LYX to Liujiaxia reservoir (LJX). The operation of the multi-year regulating reservoir LYX forces the downstream river water temperature to decrease by 4 °C in summer and increase by 5 °C in winter, resulting in the disappearance of seasonal water temperature variation characteristics. The correlation coefficient between water temperature and air temperature in this river section (0.49, p > 0.05) is significantly lower than the correlation coefficient between flow and water temperature (0.67, p < 0.05). In addition, the impact of LYX on water temperature decreases with increasing distance, and the seasonal variation characteristics of river water temperature in Xunhua station are significantly higher than those in Guide station. The water temperature in the section from LJX to QTX is less affected by reservoir operation, while there is a significant correlation between water temperature and air temperature in Lanzhou and Anningdu station (0.79, p < 0.05; 0.72, p < 0.05). The annual regulating reservoir LJX has basically not changed the changes in downstream river water temperature. The reservoir operation blocks the heat transfer at the air-water interface, and its mode of operation determines the degree of impact on downstream river water temperature changes. Future research should combine the impact of climate change, monitor long-term changes in river flow and water temperature, quantify the contribution of temperature and flow to water temperature, and provide scientific operational recommendations for reservoir managers.

黄河上游的水电开发破坏了河水的自然温度变化。然而，水电开发对河流水温和扰动模式的长期影响仍存在空白。本研究以黄河上游龙阳峡水库至青铜峡水库段为研究对象。基于近60年的观测资料，探讨了河流水温的年、季、月尺度变化，并分析了水库运行、温度和流量对水温的影响。结果表明：水库运行影响下水温变化最大的河段为LYX至刘家峡水库。多年调节水库LYX的运行，迫使下游水温夏季降低4℃，冬季升高5℃，导致水温季节性变化特征消失。该河段水温与气温的相关系数（0.49,p > 0.05）显著低于流量与水温的相关系数（0.67,p < 0.05）。此外，LYX对水温的影响随距离的增加而减小，循化站河水温度的季节变化特征显著高于贵德站。LJX ~ QTX段水温受水库运行影响较小，而兰州和安宁都站水温与气温相关性显著（0.79,p < 0.05; 0.72, p < 0.05）。LJX年度调节水库基本没有改变下游水温的变化。水库运行阻断了气水界面处的换热，其运行方式决定了对下游水温变化的影响程度。未来的研究应结合气候变化的影响，监测河流流量和水温的长期变化，量化温度和流量对水温的贡献，为水库管理者提供科学的操作建议。

{"title":"Study on water temperature variation trend and disturbance patterns in hydropower development section of the upper Yellow River","authors":"Chenxu Zhao, Yuling Liu, Ce Song, Zixuan Yan","doi":"10.1016/j.ecohyd.2024.12.002","DOIUrl":"10.1016/j.ecohyd.2024.12.002","url":null,"abstract":"<div><div>The Upper Yellow River hydropower development disrupts natural river water temperature changes. However, there are still gaps in the long-term effects of hydropower development on river water temperatures and disturbance patterns. This study takes the section from Longyangxia reservoir (LYX) to Qingtongxia reservoir (QTX) in the Upper Yellow River as the research object. Based on observations over the past 60 years, the annual, seasonal, and monthly scale changes in river water temperature were explored, and the effects of reservoir operation, temperature, and flow on water temperature were elucidated. The results indicate that the section of the river with the greatest change in water temperature under the influence of reservoir operation is from LYX to Liujiaxia reservoir (LJX). The operation of the multi-year regulating reservoir LYX forces the downstream river water temperature to decrease by 4 °C in summer and increase by 5 °C in winter, resulting in the disappearance of seasonal water temperature variation characteristics. The correlation coefficient between water temperature and air temperature in this river section (0.49, <em>p</em> > 0.05) is significantly lower than the correlation coefficient between flow and water temperature (0.67, <em>p</em> < 0.05). In addition, the impact of LYX on water temperature decreases with increasing distance, and the seasonal variation characteristics of river water temperature in Xunhua station are significantly higher than those in Guide station. The water temperature in the section from LJX to QTX is less affected by reservoir operation, while there is a significant correlation between water temperature and air temperature in Lanzhou and Anningdu station (0.79, <em>p</em> < 0.05; 0.72, <em>p</em> < 0.05). The annual regulating reservoir LJX has basically not changed the changes in downstream river water temperature. The reservoir operation blocks the heat transfer at the air-water interface, and its mode of operation determines the degree of impact on downstream river water temperature changes. Future research should combine the impact of climate change, monitor long-term changes in river flow and water temperature, quantify the contribution of temperature and flow to water temperature, and provide scientific operational recommendations for reservoir managers.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 705-717"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Evaluating water balance components in a tropical ecological zone under land use changes 土地利用变化下热带生态带水分平衡成分评价

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-10-15 DOI: 10.1016/j.ecohyd.2024.09.007

J.J. Nsiah , A. Awotwi , C. Gyamfi , G.K. Anornu , E. Boakye , S. Darko , E.K. Ackom

Water availability for domestic, institutional, and agricultural production is threatened by the continuous change in land use land cover (LULC). These changes in LULC features affect the dynamics of the hydrological processes such as surface runoff, infiltration, and evapotranspiration, resulting in variations in water availability especially, for human consumption and crop yield. Therefore, the Soil and Water Assessment Tool (SWAT) hydrological model was deployed to simulate the Pra River Basin (PRB)’s water balance response to changing LULC from 1986 to 2020. Open and closed forests reduced from an area of 11,071 km² to 5902 km² and 5125 km² to 4990 km² while settlement and cropland increased from 1100 km² to 2392 km² and 5303 km² to 9320 km² representing an average annual expansion rate of +24.7 km²/yr and +118 km²/yr respectively over the three decades. The growth in settlement and cropland resulted in an upsurge of more than 33 % and 20 % in surface runoff and water yield respectively, but decreases of over 4 % and 17 % in evapotranspiration and baseflow respectively. These changes have resulted in a seasonal increase in surface runoff, baseflow, and evapotranspiration (ET) during the wet season but a decrease during the dry season. The PRB has experienced a dramatic decline in forest areas, chiefly in areas where settlement and farmlands have been expanded. The areas where surface runoff and water yield showed significant upsurge and reduction in ET are the northwestern and southern enclaves of the basin. These findings can aid in effectively planning and managing land use to control the gradually depleting water resources in the basin.

土地利用和土地覆被（LULC）的持续变化对家庭、机构和农业生产的水资源供应构成了威胁。LULC特征的这些变化影响了水文过程的动态，如地表径流、入渗和蒸散发，导致了水的可用性，特别是人类消费和作物产量的变化。为此，利用SWAT水文模型模拟1986 - 2020年普拉河流域水平衡对LULC变化的响应。30年来，林带面积从11071 km2减少到5902 km2和5125 km2减少到4990 km2，而聚落面积从1100 km2增加到2392 km2和5303 km2增加到9320 km2，年均增长率分别为+24.7 km2/年和+118 km2/年。住区和耕地的增加使地表径流量和产水量分别增加了33%和20%以上，而蒸散量和基流分别减少了4%和17%以上。这些变化导致地表径流、基流和蒸散发（ET）在雨季增加，而在旱季减少。森林保护区的森林面积急剧减少，主要是在住区和农田扩大的地区。地表径流和产水量在流域的西北部和南部飞地表现出明显的ET上升和减少。这些发现有助于有效地规划和管理土地利用，以控制流域水资源的逐渐枯竭。

{"title":"Evaluating water balance components in a tropical ecological zone under land use changes","authors":"J.J. Nsiah , A. Awotwi , C. Gyamfi , G.K. Anornu , E. Boakye , S. Darko , E.K. Ackom","doi":"10.1016/j.ecohyd.2024.09.007","DOIUrl":"10.1016/j.ecohyd.2024.09.007","url":null,"abstract":"<div><div><span>Water availability for domestic, institutional, and agricultural production is threatened by the continuous change in land use land cover<span> (LULC). These changes in LULC features affect the dynamics of the hydrological processes such as surface runoff, infiltration, and evapotranspiration<span>, resulting in variations in water availability especially, for human consumption and crop yield. Therefore, the Soil and Water Assessment Tool (SWAT) hydrological model was deployed to simulate the Pra River Basin (PRB)’s water balance response to changing LULC from 1986 to 2020. Open and closed forests reduced from an area of 11,071 km</span></span></span><sup>2</sup> to 5902 km<sup>2</sup> and 5125 km<sup>2</sup> to 4990 km<sup>2</sup> while settlement and cropland increased from 1100 km<sup>2</sup> to 2392 km<sup>2</sup> and 5303 km<sup>2</sup> to 9320 km<sup>2</sup> representing an average annual expansion rate of +24.7 km<sup>2</sup>/yr and +118 km<sup>2</sup><span><span>/yr respectively over the three decades. The growth in settlement and cropland resulted in an upsurge of more than 33 % and 20 % in surface runoff and water yield respectively, but decreases of over 4 % and 17 % in evapotranspiration and baseflow respectively. These changes have resulted in a seasonal increase in surface runoff, baseflow, and evapotranspiration (ET) during the </span>wet season<span> but a decrease during the dry season<span>. The PRB has experienced a dramatic decline in forest areas, chiefly in areas where settlement and farmlands have been expanded. The areas where surface runoff and water yield showed significant upsurge and reduction in ET are the northwestern and southern enclaves of the basin. These findings can aid in effectively planning and managing land use to control the gradually depleting water resources in the basin.</span></span></span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 586-597"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

How spider diversity and traits interact with environmental variables in riparian sandy bars 河岸沙洲蜘蛛多样性和特征与环境变量的相互作用

IF 2.2 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology

Pub Date : 2025-07-01 Epub Date: 2024-11-19 DOI: 10.1016/j.ecohyd.2024.11.001

Leandro N. Segovia , Nicolás A. Garello , Miguel Saigo , Martín C.M. Blettler , Cristian J. Grismado , Stephane Rodrigues

Spider ecology and functional traits were analysed within side bars (SB) of the middle Paraná River, investigating their relationship with environmental variables. Pitfall traps were utilized to capture spiders during four seasonal surveys spanning the years 2018 to 2019 on three SB, characterized by varying hydrological conditions. These surveys were conducted across three pre-defined zones: Wet Zone (WZ), Temporally Exposed Zone (TEZ), and Permanently Dry Zone (PDZ). The three zones were significantly differentiated according to sedimentological variables, vegetation cover, humidity, and soil organic matter (SOM). A total of 732 spiders were collected, representing 21 families and 49 species. Lycosidae and Linyphiidae were notably dominant. The species Sphecozone ignigena, Glenognatha lacteovittata, and Agalenocosa grismadoi were the most abundant. The PDZ was the most diverse zone in terms of guilds (8), species (spp) and morphospecies (msp) (34), families (18) and total abundance (295), in addition to exhibiting the greatest vegetation cover. Analysis of beta diversity of species during the rising limb of water flow revealed that replacement exceeded nesting levels in all seasons studied, indicating that most of the beta diversity was attributable to replacement. Furthermore, specific associations were observed within spider guilds. This study was a pioneer in exclusively examining the spider communities on the banks of the second longest river in South America and analysing how their ecology and functional traits behave under different environmental variables.

分析了巴拉那河中游坝内蜘蛛的生态特征和功能特征，并探讨了它们与环境变量的关系。在2018年至2019年的四次季节性调查中，在三个水文条件不同的SB上使用陷阱捕捉蜘蛛。这些调查在三个预先定义的区域进行：湿区（WZ）、临时暴露区（TEZ）和永久干燥区（PDZ）。根据沉积学变量、植被覆盖度、湿度和土壤有机质（SOM）， 3个带有明显的分异。共收集到蜘蛛732只，代表21科49种。石芋科和林芋科占明显优势。最丰富的物种是褐藻（spheecozone ignigena）、Glenognatha lacteovittata和Agalenocosa grismadoi。在行会（8个）、种（34个）、科（18个）和总丰度（295个）方面，PDZ是最多样化的区域，植被覆盖度最大。在水流上升段对物种的β多样性进行了分析，发现所有季节物种的β多样性都超过了筑巢水平，表明大部分物种的β多样性可归因于替换。此外，在蜘蛛行会中观察到特定的关联。这项研究首次专门研究了南美洲第二大河岸边的蜘蛛群落，并分析了它们在不同环境变量下的生态和功能特征。

{"title":"How spider diversity and traits interact with environmental variables in riparian sandy bars","authors":"Leandro N. Segovia , Nicolás A. Garello , Miguel Saigo , Martín C.M. Blettler , Cristian J. Grismado , Stephane Rodrigues","doi":"10.1016/j.ecohyd.2024.11.001","DOIUrl":"10.1016/j.ecohyd.2024.11.001","url":null,"abstract":"<div><div><span>Spider ecology and functional traits were analysed within side bars (SB) of the middle Paraná River, investigating their relationship with environmental variables. </span>Pitfall traps<span><span> were utilized to capture spiders during four seasonal surveys spanning the years 2018 to 2019 on three SB, characterized by varying hydrological conditions. These surveys were conducted across three pre-defined zones: Wet Zone (WZ), Temporally Exposed Zone (TEZ), and Permanently Dry Zone (PDZ). The three zones were significantly differentiated according to sedimentological variables, vegetation cover, humidity, and soil organic matter (SOM). A total of 732 spiders were collected, representing 21 families and 49 species. </span>Lycosidae<span><span> and Linyphiidae were notably dominant. The species Sphecozone ignigena, Glenognatha lacteovittata, and Agalenocosa grismadoi were the most abundant. The PDZ was the most diverse zone in terms of guilds (8), species (spp) and </span>morphospecies (msp) (34), families (18) and total abundance (295), in addition to exhibiting the greatest vegetation cover. Analysis of beta diversity of species during the rising limb of water flow revealed that replacement exceeded nesting levels in all seasons studied, indicating that most of the beta diversity was attributable to replacement. Furthermore, specific associations were observed within spider guilds. This study was a pioneer in exclusively examining the spider communities on the banks of the second longest river in South America and analysing how their ecology and functional traits behave under different environmental variables.</span></span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 3","pages":"Pages 668-681"},"PeriodicalIF":2.2,"publicationDate":"2025-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895855","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0