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Relative Importance of Resource and Condition Niche for Invertebrates in Water-Filled Treeholes 充水树洞中无脊椎动物资源和条件生态位的相对重要性
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2026-01-09 DOI: 10.1111/fwb.70161
Soki Shinkawa, Kanata Sakaya Inoue, Akihiro Nakamura, Tomohiro Yoshida

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引用次数: 0
Ecosystem Engineering by Mussels (Margaritifera margaritifera) Influences the Behaviour of Their Host Fish Brown Trout (Salmo trutta) Under Various Flows 贻贝(Margaritifera Margaritifera)的生态系统工程在不同流量下对寄主鱼褐鳟(Salmo trutta)行为的影响
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2026-01-07 DOI: 10.1111/fwb.70169
Magnus Lovén Wallerius, Raviv Gal, Martin Österling

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引用次数: 0
Evidence for Asian Swamp Eels as an Emerging Threat to Everglades Amphibians 亚洲沼泽鳗鱼对大沼泽地两栖动物构成威胁的证据
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2026-01-05 DOI: 10.1111/fwb.70150
Hunter J. Howell, Sierra N. Thomasset, Leila M. Thompson, Mark I. Cook, Eric A. Cline, Nathan J. Dorn, Christopher A. Searcy

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引用次数: 0
Temporal Beta Diversity of Local Zooplankton Communities in Small Reservoirs is Associated With Hydrological Seasonality 小型水库局部浮游动物群落的时间β多样性与水文季节性有关
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-30 DOI: 10.1111/fwb.70158
Maisa Carvalho Vieira, Hugo de Oliveira Barbosa, Ludgero Cardoso Galli Vieira, Carla Albuquerque de Souza, Leonardo Beserra da Silva, Luis Mauricio Bini

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引用次数: 0
Issue Information - Cover and Ed Board 发行资料-封面及编印板
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-30 DOI: 10.1111/fwb.70159
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引用次数: 0
Stochastic Processes Structure Both Abundant and Rare Microbial Communities Involved in Riverine Nitrification and Denitrification Across China 中国河流硝化和反硝化过程中微生物群落的随机过程结构
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-26 DOI: 10.1111/fwb.70157
Xiaoliang Jiang, Hui Liu, Ziqian Xiong, Xiang Xiong, Wenzhi Liu

  1. Both abundant and rare microorganisms are critical in regulating soil biogeochemical processes such as nitrification and denitrification. However, the community assembly mechanisms of abundant and rare microorganisms involved in nitrification and denitrification remain unclear, especially at large scales.
  2. Here, using high-throughput sequencing of archaeal amoA, bacterial amoA, nirK, and nirS genes, we investigated the biogeographic patterns and assembly mechanisms of nitrifying and denitrifying communities in multiple habitats (riparian rhizosphere soils, riparian bulk soils, and channel sediments) of 30 rivers along a latitudinal gradient in China.
  3. The results showed that the α- and β-diversity of nitrifying and denitrifying communities usually decreased with increasing latitude. Nitrifying and denitrifying communities presented a significant distance-decay relationship (DDR), and the DDR slopes were steeper for abundant subcommunities than for rare subcommunities. Latitude, climate, vegetation, and soil properties (e.g., pH and carbon content) were important in explaining community composition variation.
  4. Our results indicate that community assemblies of nitrifiers and denitrifiers were mainly affected by stochastic processes, with those of denitrifiers and abundant nitrifiers being governed by dispersal limitation and those of rare nitrifiers by undominated processes (also known as ecological drift).
  5. To our knowledge, this is one of the few studies showing that stochastic rather than deterministic processes dominate the community assembly of abundant and rare microorganisms involved in nitrification and denitrification across China, comprising 25% of the Asian continent. Our findings have potential implications for predicting soil microorganism responses to environmental change.
丰富的和稀有的微生物在调节土壤的生物地球化学过程中都是至关重要的,如硝化和反硝化。然而,参与硝化和反硝化的丰富和稀有微生物的群落组装机制尚不清楚,特别是在大尺度上。本文利用古细菌amoA、细菌amoA、nirK和nirS基因的高通量测序,研究了中国30条河流沿纬度梯度不同生境(河岸根际土壤、河岸体土和河道沉积物)中硝化和反硝化群落的生物地理格局和组装机制。结果表明,随着纬度的增加,硝化和反硝化群落的α-和β-多样性呈下降趋势。硝化和反硝化群落呈现显著的距离衰减关系(DDR),且丰富亚群落的DDR斜率大于稀有亚群落的DDR斜率。纬度、气候、植被和土壤性质(如pH和碳含量)是解释群落组成变化的重要因素。结果表明,硝化菌和反硝化菌的群落分布主要受随机过程的影响,反硝化菌和丰富的硝化菌的群落分布受扩散限制,而稀有硝化菌的群落分布受非支配过程(也称为生态漂变)的影响。据我们所知,这是为数不多的研究之一,表明在中国(占亚洲大陆的25%),参与硝化和反硝化的丰富和稀有微生物的群落组装是随机而不是确定性过程主导的。我们的发现对预测土壤微生物对环境变化的反应具有潜在的意义。
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引用次数: 0
Spatial Segregation of Adult Aquatic Insects From the Water Surface to the Riparian Canopy in a Lowland River 一条低地河流中成虫从水面到河岸冠层的空间分离
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-19 DOI: 10.1111/fwb.70156
T. Nakagawa, J. N. Negishi, S. Yamashita, M. K. Alam, J. Wu

  1. Knowledge of how aquatic insects use riparian zones can inform the conservation and management of both rivers and riparian zones. This study reports the habitat use and spatial segregation of winged EPT (Ephemeroptera, Plecoptera, Trichoptera) adults in the river channel and riparian zone of the gravel-bed Satsunai River in Hokkaido, northern Japan.
  2. Adult insects were caught using sticky and Malaise traps in the summer of 2019 and 2020. The relative use of forest-covered and gravel-covered riparian zones and their edge habitats was examined in relation to above-water space. Furthermore, the habitat use of the natural forest-covered riparian zone in two dimensions (i.e., lateral and vertical over 104 and 18 m, respectively) was measured.
  3. Ephemeroptera were largely captured above the river channel and showed no preference for forest-covered or gravel-covered riparian habitats. In contrast, Plecoptera were caught primarily in the forest-covered riparian zone. Capture of Trichoptera was moderately higher along the edge of the forest-covered riparian zone, representing an intermediate response.
  4. We identified clear spatial segregation of EPT taxa in lateral and vertical dimensions. Most individuals were caught > 5 m above the ground in forest strata and < 30 m from the channel laterally. At the family level, Plecoptera taxa (Nemouridae and Chloroperlidae) occurred at the medium and lowest height in the vertical dimension. In particular, the numerically dominant Plecoptera family, Chloroperlidae, was most frequently found near the ground (< 5 m height), and was also distributed furthest from the stream (40 m). Other Trichoptera families such as Philopotamidae were found within relatively short distances from the channel.
  5. Riparian zones can provide preferable habitat for some EPT adults, with their structural and microclimatic diversity influencing taxon-specific two-dimensional distributions. Identification of taxa with high abundance, ease of observation, and laterally extensive use of riparian zones as a useful candidate indicator, in our case Chloroperlidae, could enable the assessment of ecosystem status in the river–riparian continuum and its responses to landscape changes in gravel-bed river corridors.
水生昆虫如何利用河岸带的知识可以为河流和河岸带的保护和管理提供信息。本文报道了日本北海道沙砾河床内沙奈河河道及河岸带翅翅小飞虫(Ephemeroptera, Plecoptera, Trichoptera)成虫的生境利用及空间分异。在2019年和2020年夏季,使用粘性和萎靡陷阱捕捉成虫。研究了森林覆盖和砾石覆盖的河岸带及其边缘生境与水上空间的相对利用。此外,还从横向和纵向两个维度(分别超过104米和18米)测量了天然森林覆盖的河岸带的生境利用。蜉蝣目主要在河道上方被捕获,对森林覆盖或砾石覆盖的河岸生境没有偏好。相比之下,翼翅目主要在森林覆盖的河岸地带被捕获。沿森林覆盖的河岸带边缘的毛翅目昆虫捕获量较高,属于中等响应。在横向和纵向上发现了明显的空间分异。在森林地层中,大多数个体在离地面5 m和离河道30 m处被捕获。在科的水平上,翅翅目(Nemouridae和Chloroperlidae)分布在垂直高度的中、低位。其中,数量优势的翼翅目绿翅科(Chloroperlidae)最常出现在近地面(5 m高度),也分布在离溪流最远的地方(40 m)。其他毛翅目科,如飞虱科,在离河道相对较短的距离内被发现。河岸带可以为部分EPT成虫提供较好的栖息地,其结构和小气候多样性影响着分类学特有的二维分布。确定高丰度、易于观察和河岸带横向广泛利用的分类群作为有用的候选指标,可以评估河流-河岸连续体的生态系统状况及其对砾石河床河流廊道景观变化的响应。
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引用次数: 0
Aquatic Insect Availability and Use by Ground-Active Terrestrial Predators Varies Between Habitats of Different Successional Age in a Braided River 辫状河不同演替年龄生境中水生昆虫的可利用性和陆栖捕食者的利用差异
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-14 DOI: 10.1111/fwb.70151
Michelle J. Greenwood, S. M. Pawson

Braided rivers are dynamic ecosystems characterised by frequent flows that rework the braidplain, forming a shifting mosaic of habitats of varying successional age. This dynamic habitat mosaic facilitates movement of resources between aquatic and terrestrial environments, fostering biodiversity and ecological resilience. Anthropogenic impacts such as impoundments, water and gravel extraction and weed encroachment can reduce the ability for the river to rework the riverbed, stabilising and homogenising the braidplain, impacting ecosystem functioning as well as geomorphology. We examined how the availability and consumption of adult aquatic insects by terrestrial invertebrate consumers varied among different-aged habitat patches within a New Zealand braided river reach with minimal anthropogenic alteration. Terrestrial and adult aquatic insect availability was quantified at ground level and aerially using pitfall and sticky traps, respectively, in five sites of three different-aged braidplain habitat types (recently formed bare gravel, intermediate and older vegetated habitats). Stable (δ13C and δ15N) isotope analyses were used to quantify the use of aquatic insect prey by predatory terrestrial invertebrates (ground-hunting spiders and predatory beetles) in each habitat type. Aquatic prey availability and consumption by terrestrial predators varied between habitat types, and different-aged habitats better supported ground- and aerial-active terrestrial predators. At ground-level, more adult aquatic insects were available and consumed by predatory beetles in bare gravel habitat types. In contrast, older vegetated habitats had higher aerial aquatic insect availability, potentially better supporting aerial-active consumers. Our results show that a relatively natural braided river reach with minimal geomorphological alteration had spatial heterogeneity in aquatic prey availability, the locations of which differed for aerial- and ground-active consumers during the austral summer. These height-dependent locations of variable aquatic prey abundance will move at varying timescales within the naturally dynamic habitat mosaic. The observed spatial heterogeneity of resource availability is likely to enhance braidplain-scale biodiversity and resilience by supporting diverse consumer groups and providing stability during high-flow events. Understanding the structure of relatively unimpacted braided river systems can support their geomorphological conservation and restoration, thus enhancing their ecological resilience in the face of environmental change. Our results provide evidence that habitat patches of varying successional age, which require frequent bed-mobilising floods to maintain, can support diverse braided river ecosystems.

辫状河是一种动态的生态系统,其特征是频繁的水流重塑了辫状平原,形成了不同演替年龄的不断变化的栖息地马赛克。这种动态的生境马赛克促进了资源在水生和陆地环境之间的流动,促进了生物多样性和生态复原力。人为影响,如水库、水和砾石的抽取以及杂草的入侵,会降低河流改造河床、稳定和均匀化辫状平原的能力,影响生态系统功能和地貌。我们研究了新西兰辫状河河段不同年龄生境斑块中陆生无脊椎动物对成虫的可得性和消费量在最小人为改变下的变化。在3种不同年龄的辫状平原生境类型(新近形成的裸砾石生境、中间和较老的植被生境)的5个地点,分别采用陷阱和粘捕法在地面和空中量化了陆生和成虫的可利用性。稳定(δ13C和δ15N)同位素分析量化了不同生境类型陆生无脊椎动物(猎地蜘蛛和捕食甲虫)对水生昆虫猎物的利用。陆地捕食者的水生猎物可得性和食用量因生境类型而异,不同年龄的生境更有利于地面和空中活动的陆地捕食者。在地面上,裸砾石生境类型的水生成虫较多,并被掠食性甲虫消耗。相比之下,较老的植被栖息地具有较高的空中水生昆虫可用性,可能更好地支持空中活动消费者。研究结果表明,相对自然、地貌变化最小的辫状河河段在水生猎物可得性上存在空间异质性,在南方夏季,空中和地面活动的猎物可得性位置存在差异。在自然动态的生境马赛克中,这些高度相关的可变水生猎物丰度位置将在不同的时间尺度上移动。观察到的资源可用性的空间异质性可能通过支持不同的消费群体和在高流量事件期间提供稳定性来增强辫状平原尺度的生物多样性和恢复力。了解相对未受影响的辫状河水系的结构可以支持其地貌保护与恢复,从而增强其面对环境变化的生态恢复力。我们的研究结果提供了证据,表明不同演替年龄的栖息地斑块,需要频繁的河床动员洪水来维持,可以支持多种辫状河生态系统。
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引用次数: 0
Ecological and Genetic Insights Into Antarctic Fairy Shrimp, Branchinecta gaini Daday, 1910 (Branchiopoda: Anostraca) Populations on King George Island, Antarctica 南极仙女虾的生态学和遗传学研究,Branchinecta gaini Daday, 1910(鳃足目:无足目)在南极乔治王岛的种群
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-11 DOI: 10.1111/fwb.70144
Stanisław Cukier, Jakub Grzesiak, Robert Józef Bialik

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引用次数: 0
Unique Genetic Diversity Patterns and Extreme Endemism in Temperate Springs: Evidence From Narrow-Range Endemic Snails 温带温泉独特的遗传多样性模式和极端地方性:来自小范围地方性蜗牛的证据
IF 2.7 2区 生物学 Q2 ECOLOGY Pub Date : 2025-12-09 DOI: 10.1111/fwb.70149
Samantha A. Donohoo, Paul D. Johnson, Nathan V. Whelan

  1. Freshwater springs often have high rates of endemism with species displaying restricted distributions, low genetic diversity and increased risk to anthropogenic influences. Several models such as the Theory of Island Biogeography, the Stream Hierarchy Model or the Death Valley Model have been invoked to explain diversity patterns in springs, especially in arid systems. However, little information exists about whether previously developed models can predict population genetic and species-level diversity of temperate spring-obligate invertebrates. As a case study, we examined the biodiversity and genetic diversity of spring-obligate gastropods at six sites in the southeastern United States to examine gastropod diversity and test how well previously developed biogeographic models characterise an understudied and imperilled system.
  2. We examined two species of Pleuroceridae snails, Princess Elimia (Elimia bellacrenata) and Cockle Elimia (Elimia cochliaris), endemic to springs in central Alabama. We sampled specimens of both species from across their current ranges and generated genome-scale data using a 2b-RAD sequencing approach. To assess species diversity and ranges, we used maximum likelihood, species tree inference and phylogenetic network approaches. We also inferred genetic diversity, population genetic structure and historical demography of each species.
  3. Phylogenetic analyses recovered four species-level lineages, including two undescribed species. Each species was found in a single spring system, resulting in an extremely small distribution. Additionally, all four of these spring-obligate lineages had higher genetic diversity than most riverine pleurocerid species. Furthermore, demographic analyses suggested that each lineage has maintained a stable population size since the Pleistocene.
  4. Our findings indicate that diversity patterns of temperate, spring-endemic gastropods do not conform to previously developed biogeographic models. Moreover, differences among species studied here and other spring-obligate groups suggest that applying broad biogeographic models to any given spring system has the potential to obscure unique characteristics of regional spring ecosystems. Empirical data should be more widely generated for understudied spring systems, and such data should inform biodiversity assessments, conservation planning and, potentially, the development of additional biogeographic models.
淡水泉的特有率往往很高,其物种分布有限,遗传多样性低,受人为影响的风险增加。一些模型,如岛屿生物地理学理论、河流等级模型或死亡谷模型,已经被用来解释春季的多样性模式,特别是在干旱系统中。然而,以前建立的模型是否能够预测温带春季专性无脊椎动物的种群遗传和物种多样性,目前还缺乏相关信息。作为一个案例研究,我们在美国东南部的六个地点检查了春季专性腹足类动物的生物多样性和遗传多样性,以检查腹足类动物的多样性,并测试先前开发的生物地理模型如何很好地表征了一个研究不足和濒危的系统。我们研究了阿拉巴马州中部泉水特有的两种胸椎螺,公主螺(Princess Elimia bellacrenata)和蜗螺(Cockle Elimia cochliaris)。我们对这两个物种的标本进行了采样,并使用2b-RAD测序方法生成了基因组规模的数据。为了评估物种多样性和范围,我们使用了最大似然、物种树推理和系统发育网络方法。我们还推测了每个物种的遗传多样性、群体遗传结构和历史人口统计。系统发育分析恢复了四个物种水平的谱系,包括两个未描述的物种。每个物种都在一个单一的春季系统中被发现,导致分布非常小。此外,这4个春性系的遗传多样性都高于大多数河流胸膜科物种。此外,人口统计分析表明,自更新世以来,每个谱系都保持了稳定的种群规模。我们的研究结果表明,温带、春季特有的腹足类动物的多样性模式不符合以前开发的生物地理模型。此外,这里所研究的物种与其他春季特有物种之间的差异表明,将广泛的生物地理模型应用于任何给定的春季系统都有可能模糊区域春季生态系统的独特特征。应该为研究不足的春季系统更广泛地产生经验数据,这些数据应该为生物多样性评估、保护规划以及可能的其他生物地理模型的发展提供信息。
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引用次数: 0
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Freshwater Biology
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