Pub Date : 2025-01-01DOI: 10.1016/j.ecohyd.2024.02.003
Zdeněk Adámek , Jana Konečná , Petr Karásek
Alterations to hydrological regime of running waters are one of the typical manifestations of current climate change. Small streams in particular are subject to both periods of critically low flow rates on the one hand and increased discharges at spates on the other. The response of macroinvertebrate assemblages to flow pulses following severe rainfall events was studied in two small highland streams. Benthic macroinvertebrates showed good resistance and resilience against the impacts of increased discharge rates caused by severe rainfall events not exceeding certain limits. No distinct changes were recorded in macroinvertebrate composition following discharge events in which current velocities increased by < 0.35 m.s−1; however, significant (p < 0.05) reductions in abundance was recorded following the spate where current velocity increased by > 1 m.s−1. Macroinvertebrate assemblages on gravel substrates were more resistant to the impact of sudden flow pulses than those on sandy substrates.
{"title":"Resistance of headwater stream macroinvertebrates to flow pulses","authors":"Zdeněk Adámek , Jana Konečná , Petr Karásek","doi":"10.1016/j.ecohyd.2024.02.003","DOIUrl":"10.1016/j.ecohyd.2024.02.003","url":null,"abstract":"<div><div><span><span>Alterations to hydrological regime of running waters are one of the typical manifestations of current </span>climate change<span><span>. Small streams in particular are subject to both periods of critically low flow rates on the one hand and increased discharges at spates on the other. The response of macroinvertebrate assemblages to flow pulses following severe rainfall events was studied in two small highland streams. Benthic macroinvertebrates showed good resistance and resilience against the impacts of increased discharge rates caused by severe rainfall events not exceeding certain limits. No distinct changes were recorded in macroinvertebrate composition following discharge events in which </span>current velocities increased by < 0.35 m.s</span></span><sup>−1</sup>; however, significant (p < 0.05) reductions in abundance was recorded following the spate where current velocity increased by > 1 m.s<sup>−1</sup>. Macroinvertebrate assemblages on gravel substrates were more resistant to the impact of sudden flow pulses than those on sandy substrates.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"25 1","pages":"Pages 166-171"},"PeriodicalIF":2.7,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167518","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2023.11.012
Sabina Smolska , Maciej Karpowicz , Magdalena Świsłocka , Elżbieta Jekatierynczuk-Rudczyk , Adam Więcko , Kamil Tarasewicz
Our research provides valuable insights into the uneven distribution of groundwater copepods in the lowland river valley ecosystem using an integrative taxonomy approach. The study was conducted in 101 wells in the Biebrza River Valley (northeastern Poland), which is one of the largest and best-preserved lowland rivers in Europe. It stands out for its exceptional biodiversity and pristine natural landscapes. Groundwater copepods were found in 49 of the 101 analyzed wells. We identified ten species of Copepoda and eight species of Cladocera. The most frequent copepods were Diacyclops bicuspidatus, Diacyclops crassicaudis, Canthocamptus staphylinus, Paracyclops cf. fimbriatus, Diacyclops bisetosus, and Eucyclops serrulatus. The aforementioned species were categorized as stygophiles, and no stygobionts were detected. Our findings suggest that the groundwater Copepoda community in this region is relatively stable and composed mostly of stygophiles along with stygoxenes. We did not find any significant impact of environmental parameters or different aquifers on the distribution of copepods, suggesting a patchy distribution of groundwater copepods in the lowland river valley. The relatively high presence of stygoxenes suggests that the exchange of organisms between surface water and groundwater plays a vital role in maintaining the diversity of microcrustaceans in lowland river valleys. Our study contributes to filling the knowledge gap regarding groundwater fauna in lowland Europe, particularly in areas affected by Pleistocene glaciations.
{"title":"The patchy distribution of groundwater copepods in the lowland river valley","authors":"Sabina Smolska , Maciej Karpowicz , Magdalena Świsłocka , Elżbieta Jekatierynczuk-Rudczyk , Adam Więcko , Kamil Tarasewicz","doi":"10.1016/j.ecohyd.2023.11.012","DOIUrl":"10.1016/j.ecohyd.2023.11.012","url":null,"abstract":"<div><div><span><span>Our research provides valuable insights into the uneven distribution of groundwater copepods in the lowland river valley ecosystem using an integrative taxonomy approach. The study was conducted in 101 wells in the Biebrza River Valley (northeastern Poland), which is one of the largest and best-preserved lowland rivers in Europe. It stands out for its exceptional biodiversity and pristine natural landscapes. Groundwater copepods were found in 49 of the 101 analyzed wells. We identified ten species of </span>Copepoda<span> and eight species of Cladocera. The most frequent copepods were </span></span><em>Diacyclops bicuspidatus, Diacyclops crassicaudis, Canthocamptus staphylinus, Paracyclops</em> cf. <em>fimbriatus, Diacyclops bisetosus</em>, and <em>Eucyclops serrulatus</em><span>. The aforementioned species were categorized as stygophiles, and no stygobionts were detected. Our findings suggest that the groundwater Copepoda community in this region is relatively stable and composed mostly of stygophiles along with stygoxenes. We did not find any significant impact of environmental parameters or different aquifers on the distribution of copepods, suggesting a patchy distribution of groundwater copepods in the lowland river valley. The relatively high presence of stygoxenes suggests that the exchange of organisms between surface water and groundwater plays a vital role in maintaining the diversity of microcrustaceans in lowland river valleys. Our study contributes to filling the knowledge gap regarding groundwater fauna in lowland Europe, particularly in areas affected by Pleistocene glaciations.</span></div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 773-784"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138691746","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2023.03.009
Xiaomin Yuan , Qiang Liu , Baoshan Cui , Wei Yang , Tao Sun , Xuan Wang , Chunhui Li , Yanpeng Cai
Shallow lakes are characterized by strong water-level fluctuations, which control shifts in carbon (C) sources and sinks. However, there remains uncertainty in elucidating the alteration in the carbon budget with water-level changes. Here, carbon budget variation with water level was estimated by between carbon sequestration (Cs) and carbon emission (Ce) (including carbon dioxide, methane) using an improved logistic model and the DeNitrification-DeComposition (DNDC) model in Baiyangdian Lake (BYD), a typical shallow lake. According to the results, the Cs and Ce were 5.33 Tg/a and 1.72 Tg/a, respectively, which indicated that BYD acted as a carbon source (3.60 Tg/a net carbon emission). The spatial pattern and high value areas (HVA) of the carbon budget showed significant change with water depth variation under water level fluctuation. The HVA of Cs, Ce and Cnet in the BYD was distributed at water depths of -0.24±0.77 m, 2.41±0.50 m and 2.53±0.26 m, respectively. At the lake scale, increasing water level will increase the unevenness of the water depth contribution of Cs, with a higher variation coefficient of the contribution structure, while the impact on the Ce contribution is not significant. Furthermore, elevating the water level increases the contribution of Cs in HVA to the whole lake, while the effect of water level on Ce is characterized by segmentation. In combination with the goal of increasing sinks and reducing emissions and the feasibility of management operation, the water level threshold based on the net carbon emissions reduction can be more accurately identified with vegetation coverage demand.
{"title":"The carbon budget induced by water-level fluctuation in a typical shallow lake","authors":"Xiaomin Yuan , Qiang Liu , Baoshan Cui , Wei Yang , Tao Sun , Xuan Wang , Chunhui Li , Yanpeng Cai","doi":"10.1016/j.ecohyd.2023.03.009","DOIUrl":"10.1016/j.ecohyd.2023.03.009","url":null,"abstract":"<div><div><span>Shallow lakes are characterized by strong water-level fluctuations, which control shifts in carbon (C) sources and sinks. However, there remains uncertainty in elucidating the alteration in the carbon budget<span> with water-level changes. Here, carbon budget variation with water level was estimated by between carbon sequestration (</span></span><em>C<sub>s</sub></em><span>) and carbon emission (</span><em>C<sub>e</sub></em>) (including carbon dioxide, methane) using an improved logistic model and the DeNitrification-DeComposition (DNDC) model in Baiyangdian Lake (BYD), a typical shallow lake. According to the results, the <em>C<sub>s</sub></em> and <em>C<sub>e</sub></em> were 5.33 Tg/a and 1.72 Tg/a, respectively, which indicated that BYD acted as a carbon source (3.60 Tg/a net carbon emission). The spatial pattern and high value areas (HVA) of the carbon budget showed significant change with water depth variation under water level fluctuation. The HVA of <em>C<sub>s</sub>, C<sub>e</sub></em> and <em>C<sub>net</sub></em> in the BYD was distributed at water depths of -0.24±0.77 m, 2.41±0.50 m and 2.53±0.26 m, respectively. At the lake scale, increasing water level will increase the unevenness of the water depth contribution of <em>C<sub>s</sub></em>, with a higher variation coefficient of the contribution structure, while the impact on the <em>C<sub>e</sub></em> contribution is not significant. Furthermore, elevating the water level increases the contribution of <em>C<sub>s</sub></em> in HVA to the whole lake, while the effect of water level on <em>C<sub>e</sub></em> is characterized by segmentation. In combination with the goal of increasing sinks and reducing emissions and the feasibility of management operation, the water level threshold based on the net carbon emissions reduction can be more accurately identified with vegetation coverage demand.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 901-909"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115547552","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2023.03.001
Ke-Gang Zhang , Ying Du , Yu-Ping Cao , Zhi-Wei Wang , Kun Zhang , Yi Jin , Jun-Hong Bai , Chun-Gang Yuan
A new alternative supporting matrix for constructed wetlands was explored using fly ash modified with Zr-Mn binary oxides (Zr-Mn/FA) and examined its performance in the control of arsenic pollution in wetland waters. The prepared matrix was characterized by SEM, XRD and EDS. Batch experiments were performed to investigate the effects of various conditions for the adsorption of arsenic onto Zr-Mn/FA including pH, contact time, concentration, temperature,loading amount of Zr-Mn and co-existing ions. The results showed that Zr-Mn oxides on the surface of Zr-Mn/FA dominated the reaction force between arsenic and adsorbent. The phosphate anion could reduce the adsorption process of arsenite (As(Ⅲ))and arsenate (As(Ⅴ)) when its concentration exceeds 1.0 mg·L−1. The experimental data of both As(Ⅲ) and As(Ⅴ) adsorption on Zr-Mn/FA were well fitted with pseudo-second order kinetic model as well as Langmuir adsorption isotherm model with the maximum adsorption capacities of 70.13 mg·g−1 for As(Ⅲ) and 43.19 mg·g−1 for As(Ⅴ), respectively. The thermodynamic study suggested that the adsorption of As(Ⅲ) and As(Ⅴ) were both endothermic. However, the adsorption of As(Ⅴ) was spontaneous while the opposite conclusion was obtained for As(Ⅲ). The prepared material (Zr-Mn/FA) was then successfully applied in the real water samples from wetland which indicated that Zr-Mn/FA composite could be a promising matrix for constructed wetland to effectively remove inorganic arsenic from water.
{"title":"Removal of arsenic in freshwater wetland waters using fly ash modified with zirconium-manganese binary oxides","authors":"Ke-Gang Zhang , Ying Du , Yu-Ping Cao , Zhi-Wei Wang , Kun Zhang , Yi Jin , Jun-Hong Bai , Chun-Gang Yuan","doi":"10.1016/j.ecohyd.2023.03.001","DOIUrl":"10.1016/j.ecohyd.2023.03.001","url":null,"abstract":"<div><div>A new alternative supporting matrix for constructed wetlands was explored using fly ash modified with Zr-Mn binary oxides (Zr-Mn/FA) and examined its performance in the control of arsenic pollution in wetland waters. The prepared matrix was characterized by SEM, XRD and EDS. Batch experiments were performed to investigate the effects of various conditions for the adsorption of arsenic onto Zr-Mn/FA including pH, contact time, concentration, temperature,loading amount of Zr-Mn and co-existing ions. The results showed that Zr-Mn oxides on the surface of Zr-Mn/FA dominated the reaction force between arsenic and adsorbent. The phosphate anion could reduce the adsorption process of arsenite (As(Ⅲ))and arsenate (As(Ⅴ)) when its concentration exceeds 1.0 mg·L<sup>−1</sup><span>. The experimental data of both As(Ⅲ) and As(Ⅴ) adsorption on Zr-Mn/FA were well fitted with pseudo-second order kinetic model as well as Langmuir adsorption isotherm model with the maximum adsorption capacities of 70.13 mg·g</span><sup>−1</sup> for As(Ⅲ) and 43.19 mg·g<sup>−1</sup> for As(Ⅴ), respectively. The thermodynamic study suggested that the adsorption of As(Ⅲ) and As(Ⅴ) were both endothermic. However, the adsorption of As(Ⅴ) was spontaneous while the opposite conclusion was obtained for As(Ⅲ). The prepared material (Zr-Mn/FA) was then successfully applied in the real water samples from wetland which indicated that Zr-Mn/FA composite could be a promising matrix for constructed wetland to effectively remove inorganic arsenic from water.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 875-883"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127076719","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2023.09.004
Junxiang Cheng , Ligang Xu , Rong Wang , Hailin You , Hongxiang Fan , Yakun Wu
The ecological sustainability of rivers and floodplains depends on their natural flows. Dam construction on rivers has dramatically altered the hydrologic regimes, in turn affecting aquatic ecosystem integrity. The environmental flow components was applied to exam the impacts of the two dams (i.e., the Gezhouba Dam and the Three Gorges Dam) on downstream flows of the Yangtze River, China. Due to the operation of the two dams, the Yangtze River's flow regimes became homogenous through increasing streamflow during the dry season and decreasing streamflow in the flood season. The monthly low flows from January to April significantly increased by 14-31%, while October and November low flows significantly decreased by 18-25%. We observed the decreased duration and frequency of extreme low flows and floods, particularly the disappearance in large floods. These homogenous flows strongly influence the aquatic biodiversity. To alleviate the hydrologic alteration and minimize the negative ecological influence, low flows should be lower and floods should be reestablished as a natural state. The flow characteristics of duration, timing and rate of change should also be incorporated into the environmental flow recommendations. Our results could provide a potential solution to the tradeoffs between water resources exploitation and natural water requirement in the highly regulated rivers.
{"title":"Comprehensive evaluation of environmental flows in the Yangtze River regulated by two large dams","authors":"Junxiang Cheng , Ligang Xu , Rong Wang , Hailin You , Hongxiang Fan , Yakun Wu","doi":"10.1016/j.ecohyd.2023.09.004","DOIUrl":"10.1016/j.ecohyd.2023.09.004","url":null,"abstract":"<div><div>The ecological sustainability of rivers and floodplains depends on their natural flows. Dam construction on rivers has dramatically altered the hydrologic regimes, in turn affecting aquatic ecosystem integrity. The environmental flow components was applied to exam the impacts of the two dams (i.e., the Gezhouba Dam and the Three Gorges Dam) on downstream flows of the Yangtze River, China. Due to the operation of the two dams, the Yangtze River's flow regimes became homogenous through increasing streamflow during the dry season and decreasing streamflow in the flood season. The monthly low flows from January to April significantly increased by 14-31%, while October and November low flows significantly decreased by 18-25%. We observed the decreased duration and frequency of extreme low flows and floods, particularly the disappearance in large floods. These homogenous flows strongly influence the aquatic biodiversity. To alleviate the hydrologic alteration and minimize the negative ecological influence, low flows should be lower and floods should be reestablished as a natural state. The flow characteristics of duration, timing and rate of change should also be incorporated into the environmental flow recommendations. Our results could provide a potential solution to the tradeoffs between water resources exploitation and natural water requirement in the highly regulated rivers.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 950-957"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135348902","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2024.07.009
Mateusz Grygoruk, Tomasz Okruszko
{"title":"Reference in transition or transitional reference? Documenting ecohydrological features of wetlands and aquatic ecosystems in the Biebrza Valley at the beginning of the 21st century","authors":"Mateusz Grygoruk, Tomasz Okruszko","doi":"10.1016/j.ecohyd.2024.07.009","DOIUrl":"10.1016/j.ecohyd.2024.07.009","url":null,"abstract":"","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 727-729"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143158927","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2022.01.005
Bo Kuang , Rong Xiao , Chen Wang , Ling Zhang , Zhuoqun Wei , Junhong Bai , Kegang Zhang , Marco Campos , Milko A. Jorquera
Anthropogenic perturbations make negative effects on wetland ecosystems, such as increasing levels of eutrophication. Under variable environmental conditions, studying the processes and mechanisms underlying their spatial distribution is critical to biogeochemical significance of microorganisms. In order to understand the changes in sediment bacterial community and their assembly with long-term eutrophication of the Baiyangdian Lake of China, we explored the microbial communities for 24 surface sediment samples using high throughput sequencing of V3-V4 region of 16S rRNA gene, meanwhile we employed Neutral community model (NCM) to characterize the community assembly processes. Then, the β-nearest taxon index (βNTI) based on a null model was used to provide a quantitative description of the assembly processes of the bacterial community. Dispersal limitation, quantified by βNTI, accounted for ∼64.6% of all assembly processes. As the increasing levels of eutrophication, deterministic processes of bacterial community assembly may be enhanced. Moreover, the significant correlation between the βNTI and change in water NO3− or sediment pH might lead to deterministic processes. There was some selection pressure acting within the Baiyangdian lake sediments. The neutral community model properly explained bacterial community assembly. The NO3−, NH4+, pH and EC were main influencing factors on the composition of the bacterial community. The overlying water NO3−, surface water NO3− and sediment pH were the three most crucial environmental factors to drive bacterial assembly. The findings revealed that Group 4 with relatively stronger deterministic processes as a more eutrophic area should be monitored as an indicator for eutrophication governance.
{"title":"Bacterial community assembly in surface sediments of a eutrophic shallow lake in northern China","authors":"Bo Kuang , Rong Xiao , Chen Wang , Ling Zhang , Zhuoqun Wei , Junhong Bai , Kegang Zhang , Marco Campos , Milko A. Jorquera","doi":"10.1016/j.ecohyd.2022.01.005","DOIUrl":"10.1016/j.ecohyd.2022.01.005","url":null,"abstract":"<div><div><span><span><span><span>Anthropogenic perturbations make negative effects on wetland ecosystems, such as increasing levels of </span>eutrophication. Under variable environmental conditions, studying the processes and mechanisms underlying their spatial distribution is critical to biogeochemical significance of </span>microorganisms<span>. In order to understand the changes in sediment bacterial community and their assembly with long-term eutrophication of the Baiyangdian Lake of China, we explored the </span></span>microbial communities for 24 surface sediment samples using high throughput sequencing of V3-V4 region of 16S rRNA gene, meanwhile we employed Neutral community model (NCM) to characterize the community assembly processes. Then, the β-nearest taxon index (βNTI) based on a null model was used to provide a quantitative description of the assembly processes of the bacterial community. Dispersal limitation, quantified by βNTI, accounted for ∼64.6% of all assembly processes. As the increasing levels of eutrophication, deterministic processes of bacterial community assembly may be enhanced. Moreover, the significant correlation between the βNTI and change in water NO</span><sub>3</sub><sup>−</sup><span> or sediment pH might lead to deterministic processes. There was some selection pressure acting within the Baiyangdian lake sediments. The neutral community model properly explained bacterial community assembly. The NO</span><sub>3</sub><sup>−</sup>, NH<sub>4</sub><sup>+</sup>, pH and EC were main influencing factors on the composition of the bacterial community. The overlying water NO<sub>3</sub><sup>−,</sup><span> surface water NO</span><sub>3</sub><sup>−</sup> and sediment pH were the three most crucial environmental factors to drive bacterial assembly. The findings revealed that Group 4 with relatively stronger deterministic processes as a more eutrophic area should be monitored as an indicator for eutrophication governance.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 828-838"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72926059","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2024.04.006
Paweł Marcinkowski, Mikołaj Piniewski, Mateusz Grygoruk, Dorota Mirosław-Świątek
Over the last decades observed climate change in Poland had a significant impact on the condition and functioning of the environment. Thus, it is crucial to analyze further future changes to be able to cope with the potential effects of changing climate conditions. In this study, we aimed to assess the impact of projected climate change on meteorological and hydrological conditions in the Biebrza Basin. We analyzed seasonal and annual changes in air temperature, precipitation, streamflow and flood characteristics using the hydrological Soil and Water Assessment Tool (SWAT) model. We examined projected changes for two future time horizons (2024–2050 and 2074–2100) under the Representative Concentration Pathways (RCP) 4.5 and 8.5 using an ensemble of nine EUROCORDEX model scenarios. Climate change projections indicated an increase in precipitation by up to +17 % (+117 mm) and air temperature by up to 3.8 °C by the end of the 21st century. In the analyzed flow gauges a considerable increase in low and mean flows is projected in the future. High flows are projected to slightly decrease for Sztabin, remain at a similar level for Dębowo and slightly increase for Osowiec and Burzyn. Flood area and volume will slightly increase in future horizons. The greatest increase in flood duration (by up to 16 days) is projected for RCP8.5 by the end of the 21st century. It seems, that the expected hydrological conditions, both in the short and long term, will become more stable and improve the conditions for the development of wetlands.
{"title":"Climate change in the Biebrza Basin—Projections and ecohydrological implications","authors":"Paweł Marcinkowski, Mikołaj Piniewski, Mateusz Grygoruk, Dorota Mirosław-Świątek","doi":"10.1016/j.ecohyd.2024.04.006","DOIUrl":"10.1016/j.ecohyd.2024.04.006","url":null,"abstract":"<div><div>Over the last decades observed climate change in Poland had a significant impact on the condition and functioning of the environment. Thus, it is crucial to analyze further future changes to be able to cope with the potential effects of changing climate conditions. In this study, we aimed to assess the impact of projected climate change on meteorological and hydrological conditions in the Biebrza Basin. We analyzed seasonal and annual changes in air temperature, precipitation, streamflow and flood characteristics using the hydrological Soil and Water Assessment Tool (SWAT) model. We examined projected changes for two future time horizons (2024–2050 and 2074–2100) under the Representative Concentration Pathways (RCP) 4.5 and 8.5 using an ensemble of nine EURO<img>CORDEX model scenarios. Climate change projections indicated an increase in precipitation by up to +17 % (+117 mm) and air temperature by up to 3.8 °C by the end of the 21st century. In the analyzed flow gauges a considerable increase in low and mean flows is projected in the future. High flows are projected to slightly decrease for Sztabin, remain at a similar level for Dębowo and slightly increase for Osowiec and Burzyn. Flood area and volume will slightly increase in future horizons. The greatest increase in flood duration (by up to 16 days) is projected for RCP8.5 by the end of the 21st century. It seems, that the expected hydrological conditions, both in the short and long term, will become more stable and improve the conditions for the development of wetlands.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 796-807"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141027490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2023.08.014
Xinyu Liu , Wei Yang , Xianting Fu , Xiaoxiao Li
Water level management is an effective way to promote ecological restoration of shallow lakes. However, efforts to achieve an ecologically suitable water level often emphasize keeping water above the minimum water level and reducing water level fluctuations, but ignore the purpose of maintaining the ecosystem's stability and health. In this paper, we developed a PCLake model to determine the optimal monthly ecological water level with the goals of stably achieving clear water and maintaining ecosystem health. We simulated the regime shifts between eutrophic and oligotrophic in China's Baiyangdian Lake, and determined that the critical P loadings during eutrophication and oligotrophication were 1.57 and 0.835 mg/m2/day, respectively. The annual and monthly optimal water levels ranged from 7.8 to 8.6 m and from 7.6 to 8.6 m, respectively. Our results provide a scientific basis for the ecological restoration of Baiyangdian Lake.
{"title":"Determination of the ecological water levels in shallow lakes based on regime shifts: A case study of China's Baiyangdian Lake","authors":"Xinyu Liu , Wei Yang , Xianting Fu , Xiaoxiao Li","doi":"10.1016/j.ecohyd.2023.08.014","DOIUrl":"10.1016/j.ecohyd.2023.08.014","url":null,"abstract":"<div><div><span>Water level management is an effective way to promote ecological restoration of shallow lakes. However, efforts to achieve an ecologically suitable water level often emphasize keeping water above the minimum water level and reducing water level fluctuations, but ignore the purpose of maintaining the ecosystem's stability and health. In this paper, we developed a PCLake model to determine the optimal monthly ecological water level with the goals of stably achieving clear water and maintaining ecosystem health. We simulated the regime shifts between eutrophic and oligotrophic in China's Baiyangdian Lake, and determined that the critical P loadings during eutrophication and oligotrophication were 1.57 and 0.835 mg/m</span><sup>2</sup>/day, respectively. The annual and monthly optimal water levels ranged from 7.8 to 8.6 m and from 7.6 to 8.6 m, respectively. Our results provide a scientific basis for the ecological restoration of Baiyangdian Lake.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 931-943"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125455020","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}
Pub Date : 2024-12-01DOI: 10.1016/j.ecohyd.2023.08.007
Jonas Schoelynck , Ewa Papierowska , Daria Sikorska , Jan Szatyłowicz
Leaf water repellency (LWR) is a very important plant trait that influences plant performance in many different ways in different habitats. Being always in contact with water, the conditions for aquatic plants (macrophytes) are very different than for terrestrial plants and many of the advantages of high water repellency are less relevant for submerged macrophyte leaves. This paper is the first to determine the LWR of submerged leaves of 6 common macrophyte species by measurements of a contact angle between a water droplet and the leaf surface. Contact angles varied between 30° and 80°, classifying all species as hydrophilic. Yet significant interspecific differences were found. Differences between the ab- and adaxial leaf sides were small. The presence of a biofilm changed contact angles across species by about 20° in a positive or negative direction, depending on periphyton mass. Potential ecological effects of variation in LWR are discussed for macrophytes and manipulation of the biofilm by the plants to optimize LWR is hypothesized.
{"title":"How wet are water plants? Determination of macrophyte leaf water repellency","authors":"Jonas Schoelynck , Ewa Papierowska , Daria Sikorska , Jan Szatyłowicz","doi":"10.1016/j.ecohyd.2023.08.007","DOIUrl":"10.1016/j.ecohyd.2023.08.007","url":null,"abstract":"<div><div>Leaf water repellency (LWR) is a very important plant trait that influences plant performance in many different ways in different habitats. Being always in contact with water, the conditions for aquatic plants (macrophytes) are very different than for terrestrial plants and many of the advantages of high water repellency are less relevant for submerged macrophyte leaves. This paper is the first to determine the LWR of submerged leaves of 6 common macrophyte species by measurements of a contact angle between a water droplet and the leaf surface. Contact angles varied between 30° and 80°, classifying all species as hydrophilic. Yet significant interspecific differences were found. Differences between the ab- and adaxial leaf sides were small. The presence of a biofilm changed contact angles across species by about 20° in a positive or negative direction, depending on periphyton mass. Potential ecological effects of variation in LWR are discussed for macrophytes and manipulation of the biofilm by the plants to optimize LWR is hypothesized.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 730-737"},"PeriodicalIF":2.7,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117178906","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}
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