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Impacts of two high-head dams on macroinvertebrate communities in the regulated river reaches of Wujiang River, China 两座高水头大坝对中国乌江调节河段大型无脊椎动物群落的影响
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-22 DOI: 10.1002/eco.2659
Shiyun Chi, Juxiang Hu, Xianfu Zhao, Jun Hu, Sixin Li, Hongjun Wang, Lianfeng Zhou, Dewang Li
{"title":"Impacts of two high-head dams on macroinvertebrate communities in the regulated river reaches of Wujiang River, China","authors":"Shiyun Chi,&nbsp;Juxiang Hu,&nbsp;Xianfu Zhao,&nbsp;Jun Hu,&nbsp;Sixin Li,&nbsp;Hongjun Wang,&nbsp;Lianfeng Zhou,&nbsp;Dewang Li","doi":"10.1002/eco.2659","DOIUrl":"10.1002/eco.2659","url":null,"abstract":"<p>The impact of two high-head dams on macroinvertebrate communities within the regulated reaches of the Wujiang River in China was explored, using longitudinal monitoring data spanning from 2006 to 2016. In this study, we set up 10 sampling sites categorized into four areas based on different stressors and defined three stages based on the timeline of dam construction. Our findings revealed significant changes in community composition before and after dam impoundment. While certain original dominant taxa, such as <i>Rivularia globosa</i> and <i>Lithoglyphopsis ovatus</i>, remained dominant throughout the stages, mayflies and caddisflies nearly vanished in the downstream reaches of the dams. This trend was accompanied by the disappearance of taxa with low adaptability and the emergence of tolerant taxa downstream of the dams. Additionally, typical limnological taxa colonized the inundated reaches. Dam impoundment affected not only macroinvertebrate community composition but also diversity. In this study, the recovery effect of communities downstream of dams was not observed due to the limited distance, but the presence of Wujiangdu Dam upstream of the two dams for over 20 years makes us believe that in a large river system, macroinvertebrate communities downstream of high-head dams may fully recover if the distance from the dams is long enough. The original and vulnerable species <i>R. globosa</i>, which demonstrated remarkable adaptability and thrived downstream of dams, should be further studied in the future.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
A review of carbon and phosphorus ratios in fresh water ecosystems dominated by phytoplankton: Effects of climate and geography 以浮游植物为主的淡水生态系统中的碳磷比例综述:气候和地理的影响
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-22 DOI: 10.1002/eco.2666
Gohar Ayub, Jinzhu Su, Yuping Su, Luwei Zheng, Yuanyuan Zhou, Sami ur Rehman, Muhammad Zahir
{"title":"A review of carbon and phosphorus ratios in fresh water ecosystems dominated by phytoplankton: Effects of climate and geography","authors":"Gohar Ayub,&nbsp;Jinzhu Su,&nbsp;Yuping Su,&nbsp;Luwei Zheng,&nbsp;Yuanyuan Zhou,&nbsp;Sami ur Rehman,&nbsp;Muhammad Zahir","doi":"10.1002/eco.2666","DOIUrl":"10.1002/eco.2666","url":null,"abstract":"<p>In freshwater systems, carbon, nitrogen, and phosphorus are essential macroelements. Changing ecological communities as a result of anthropogenic activity and climate change has become a global issue. C:P has been demonstrated to be a trustworthy and sensitive assay for detecting and monitoring single or multiple species in a wide range of samples. We look at how C:P can be utilized to manage and reduce eutrophication and harmful algal blooms (HABs) in freshwater environments in this review work. Recent research show how C:P has been shown to be a useful strategy for gathering complete data in freshwater ecosystem studies. The total number of papers in ScienceDirect from 2000 to 2023 with the terms “carbon and phosphorus ratios, fresh water ecosystems, and phytoplankton” in the title, abstract, or keywords was acquired for this review. Based on the number of published research demonstrating an increased understanding of the basic scientific concepts behind the carbon and phosphorus ratio, the overall temporal trend in publications on the ratio showed a steady growth. Compared to eutrophic Lake Victoria, which had a C:P of 149, mesotrophic Lakes Malawi and Kivu had a ratio of 263. Applying the carbon-to-phosphorus ratio to lake and reservoir eutrophication assessment is feasible, and the increasing C:P ratio serves as a prime indicator for the initiation of lake and reservoir reoligotrophication. Our findings establish the framework for future study into the relationship between organic nutrients and eutrophication, as well as the ecological ramifications of these relationships in freshwater systems. Furthermore, our prediction was that increases in C:P would change the structure of phytoplankton communities.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Advancements and trends in ecological models for lake ecosystems: A bibliometric analysis (2002–2022) 湖泊生态系统生态模型的进展与趋势:文献计量分析(2002-2022 年)
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-21 DOI: 10.1002/eco.2655
Wei Li, Jianjian Wang, Cheng Chen, Jiang Xia, Yong Niu, Zhiguo Yu, Shan Qu, Junjie Jia
{"title":"Advancements and trends in ecological models for lake ecosystems: A bibliometric analysis (2002–2022)","authors":"Wei Li,&nbsp;Jianjian Wang,&nbsp;Cheng Chen,&nbsp;Jiang Xia,&nbsp;Yong Niu,&nbsp;Zhiguo Yu,&nbsp;Shan Qu,&nbsp;Junjie Jia","doi":"10.1002/eco.2655","DOIUrl":"10.1002/eco.2655","url":null,"abstract":"<p>Ecological models hold significant potential for advancing lake research. In this study, we employed CiteSpace, a bibliometric analysis tool, and VOSviewer, a visualisation software, to facilitate a comprehensive understanding of recent advancements in ecological modelling within the context of lake research. The objective was to furnish valuable references in support of the widespread application of ecological models in aquatic environments. Using the 4688 articles collected in the Web of Science (WoS) core database as the sample data source, conducting corresponding data mining and quantitative analysis through visualisation analysis software such as CiteSpace and VOSviewer. From the perspectives of literature output patterns, keyword co-occurrence networks and future research directions, in-depth quantitative and visual analysis is carried out on the current status of research on lake ecological models, research institutions, journal publication situations, prolific authors and research hot topics. Through meticulous examination of literature and organisational categorisation techniques, we systematically scrutinised and synthesised the present state, limitations and noteworthy considerations associated with models such as EFDC, CE-QUAL-W2, DYRESM-CAEDYM, AQUATOX, Vollenweider, PCLake, MIKE, WASP and Deflt3D in the context of lake research. Our findings reveal that research focal points from 2002 to 2022 encompass climate change, the ramifications of eutrophication on aquatic ecosystems and the effects of phytoplankton and resuspended sediments on lake management.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141115050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Critical linkages among floodplain hydrology, geomorphology and ecology along a lowland meandering river, Illinois, USA 美国伊利诺伊州一条低地蜿蜒河流沿岸洪泛区水文、地貌和生态之间的重要联系
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-17 DOI: 10.1002/eco.2661
Tanya Shukla, Chelsy R. Salas, Ryan C. Pankau, Bruce L. Rhoads
{"title":"Critical linkages among floodplain hydrology, geomorphology and ecology along a lowland meandering river, Illinois, USA","authors":"Tanya Shukla,&nbsp;Chelsy R. Salas,&nbsp;Ryan C. Pankau,&nbsp;Bruce L. Rhoads","doi":"10.1002/eco.2661","DOIUrl":"10.1002/eco.2661","url":null,"abstract":"<p>The ecology of forested floodplains is intricately linked to river hydrology through the frequency, magnitude, timing and duration of floodplain inundation. Spatial variability in inundation characteristics is influenced by the geomorphic template of a floodplain, both in terms of the topography of floodplain features and connectivity of these features to the main river channel. Spatial variability in inundation, in turn, has the potential to produce spatial variability in forest ecological characteristics. This study examines the influence of floodplain geomorphic features on spatial variability in inundation frequency as well as the relationship between these geomorphic features and the ecological characteristics of a floodplain forest. The frequencies of floods of different magnitudes are determined from flow-duration analysis of over 100 years of discharge data for a lowland meandering river in Illinois, USA. Data on discharge, stage, and topography are then used to calibrate a two-dimensional hydraulic model of flow across the floodplain at different levels of inundation. Integrating the frequency and inundation data yields mapping of average annual inundation frequency for different parts of the floodplain. Significant differences in inundation frequency correspond to three distinct floodplain geomorphic features: secondary channels (frequency = 12%), closed depressions (frequency = 4%) and the floodplain surface (frequency = 3%). Tree density is similar among the three types of geomorphic features, but tree species composition and canopy density differ significantly between secondary channels and the floodplain surface. The results provide insight into linkages among hydrology, geomorphology and tree characteristics of forested floodplains of lowland meandering rivers.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2661","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140962619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
引用次数: 0
Bubbling trouble: Effects of supersaturated water on benthic macroinvertebrates 沸腾的烦恼过饱和水对底栖大型无脊椎动物的影响
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-15 DOI: 10.1002/eco.2665
Gaute Velle, Trond Einar Isaksen, Robert J. Lennox, Ulrich Pulg
{"title":"Bubbling trouble: Effects of supersaturated water on benthic macroinvertebrates","authors":"Gaute Velle,&nbsp;Trond Einar Isaksen,&nbsp;Robert J. Lennox,&nbsp;Ulrich Pulg","doi":"10.1002/eco.2665","DOIUrl":"10.1002/eco.2665","url":null,"abstract":"<p>The saturation of total dissolved gases (TDG) in water remains around 100%. Certain circumstances can lead to TDG values exceeding 100%, resulting in TDG supersaturation (TDGS). TDGS above about 110% can be toxic to animals that rely on water for gas exchange. However, saturation beyond 200% can occur in freshwater downstream of dams and hydroelectric power plants. Despite its impact, TDGS is often overlooked as a hazard to aquatic life, particularly for benthic macroinvertebrates. This study aimed to examine the effects of TDGS on nine species of benthic macroinvertebrates. We used replicated tank studies to manipulate TDGS levels from 100% to 120% and investigated the overall survival and species-specific effects on survival and buoyancy. We also present a summary on the effects of TDGS on invertebrate species previously tested. The results indicate that seven of nine species exhibited increased buoyancy when exposed to TDGS, causing them to float on the water surface. Additionally, a Cox Proportional Hazards model revealed a significant effect of TDGS on the survival of the macroinvertebrates. The sensitivity towards TDGS varied greatly among species of benthic macroinvertebrates, and significant species-specific effects were only observed for <i>Isoperla grammatica</i>, <i>Baetis rhodani</i> and <i>Asellus aquaticus</i>. Among these, the two latter species showed clear dose-related effects caused by TDGS, enabling the assessment of LT50 (time required to kill half of the tested population). <i>B. rhodani</i> was most sensitive with a LT50 of 3.7 days at 119% TDGS. Both species had visible air bubbles under the exoskeleton. Our findings highlight that direct and indirect effects on benthic macroinvertebrates can occur even at low to moderate levels of gas supersaturation, likely causing reduced density, decreased species diversity and altered species composition. The emerging evidence strongly supports the implementation of regulations on TDGS in freshwaters.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2665","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140978109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
引用次数: 0
The assessment of water quality by macroinvertebrate and water quality indices in small reservoir (Damsa, Türkiye) 用小型水库(土耳其达姆萨)中的大型无脊椎动物和水质指数评估水质
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-14 DOI: 10.1002/eco.2658
Özlem Fındık, Seval Aras
{"title":"The assessment of water quality by macroinvertebrate and water quality indices in small reservoir (Damsa, Türkiye)","authors":"Özlem Fındık,&nbsp;Seval Aras","doi":"10.1002/eco.2658","DOIUrl":"10.1002/eco.2658","url":null,"abstract":"<p>The composition and spatial distribution of macroinvertebrates in the Damsa reservoir have been analysed. Also, reservoir water was evaluated with water quality index (WQI). Damsa reservoir is significant for both biodiversity and recreation in the region. Except for the winter season, the lake water is of good quality for WQI. There is pollution in the lake in terms of phosphorus, especially for winter. In terms of phosphate, all of the stations are mezotrophic for the OECD; however, Stations 4 and 5 are eutrophic for the Türkiye Surface Water Quality Management Regulation (the others are mezotrophic). Community variation and status of benthic macroinvertebrate were evaluated with Ecological Status Class Assessment Tools (ESCATs) indices which have been widely used in the literature. In the present study, 1062 individual benthic macroinvertebrates from 11 orders and 17 families were collected. A total of 46 macroinvertebrates taxa were identified. The first three dominant groups are Oligochaeta (42.66%), Hemiptera (<i>Micronecta scholtzi</i>, 23.07%) and Chironomidae (19.67%).</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140978693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Dam-induced difference of fish habitat distribution in the fluctuating backwater zone of the Three Gorges Dam 大坝引起的三峡大坝波动回水区鱼类生境分布差异
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-02 DOI: 10.1002/eco.2657
Li Wang, Qingrong Xie, Shengfa Yang, Guanbing Xu, Wei Yang, Jiang Hu
{"title":"Dam-induced difference of fish habitat distribution in the fluctuating backwater zone of the Three Gorges Dam","authors":"Li Wang,&nbsp;Qingrong Xie,&nbsp;Shengfa Yang,&nbsp;Guanbing Xu,&nbsp;Wei Yang,&nbsp;Jiang Hu","doi":"10.1002/eco.2657","DOIUrl":"10.1002/eco.2657","url":null,"abstract":"<p>Changes in fish habitat induced by dam construction in the downstream river have been well documented in an increasing body of literature. Fish habitats in the backwater zone of dams have undergone dramatic changes, which have still remained poorly understood. This study aims to provide a more complete understanding of fish habitat distribution and clarify fish habitat utilization patterns in the upstream dam in order to adopt effective remediation activities. This study was conducted in the Three Gorges Dam (TGD) as it is the world's largest installed capacity hydropower station, with a backwater zone length of about 660 km. Four major Chinese carp (FMCC) were selected as target fish species, and fish habitat distribution upstream of TGD was assessed by integrating the swimming ability and environmental preference of different fish species into their critical life stages. Assessment results at different life stages of the target fish species showed that June was a critical period for spawning activities FMCC in the fluctuating backwater zone of TGD. The riverbank was an important feeding habitat for FMCC, and the high-velocity flow in the centre of the channel exceeded the limits of the swimming ability of target fish. The fish habitat distribution in the fluctuating backwater zone of TGD was heavily affected by runoff from April to September and by dam operation from October to March of the next year. This work provide valuable information about river conservation and management in the upstream of TGD.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140840624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Making temporal dynamics relevant: The role of macrophytes in the phenological complexity of a shallow freshwater lake 使时间动态具有相关性:大型植物在浅水淡水湖物候复杂性中的作用
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-05-01 DOI: 10.1002/eco.2663
Viktor R. Tóth
{"title":"Making temporal dynamics relevant: The role of macrophytes in the phenological complexity of a shallow freshwater lake","authors":"Viktor R. Tóth","doi":"10.1002/eco.2663","DOIUrl":"10.1002/eco.2663","url":null,"abstract":"<p>A multidisciplinary approach demonstrates how submerged macrophytes generate high phenological variability in Hungary's Lake Balaton. A 239-month time series of water chlorophyll indices derived from Landsat 7 imagery from 1999 to 2019 was used. These data facilitated the generation of area-based phenological patterns, which allowed an assessment of phenological variability by correlating chlorophyll index sequences with spatially adjacent values. The results showed that phenological variability was consistently low (below 5%) at the farthest points from the shore, indicating uniform phenological processes in the pelagic zone of Lake Balaton. Conversely, the littoral zone showed almost eight times higher variability, indicating increased diversity in shallow water areas. In particular, extensive macrophyte biomass datasets revealed a direct relationship between increased phenological variability in the littoral zone and macrophyte biomass (Spearman rank correlation: 0.893). This research highlights contrasting phenological patterns between phytoplankton and macrophyte communities, driven by different life cycles, and the possibility of effectively using satellite data to delineate phenological separation within lakes.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 6","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140840621","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
The riverbank vegetation for mitigating the adverse effects of sediment dredging 减轻泥沙疏浚不利影响的河岸植被
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-04-29 DOI: 10.1002/eco.2656
Sukhjeet Arora, Bimlesh Kumar
{"title":"The riverbank vegetation for mitigating the adverse effects of sediment dredging","authors":"Sukhjeet Arora,&nbsp;Bimlesh Kumar","doi":"10.1002/eco.2656","DOIUrl":"10.1002/eco.2656","url":null,"abstract":"<p>Sediment dredging has been an ever-growing issue, especially in developing nations with high demand for concrete filler material. River systems are adversely affected by sediment mining, resulting in decreased stability of the riverbed and riverbanks. Nature-based solutions for riverbank erosion have been a research topic that has led to the proposal of vegetation on the riverbanks. However, little is known about the extent of riverbank vegetation required to negate the devastating effects of sediment mining because dense vegetation severely affects the flow structure and becomes a waste trap. This experimental study uses sparsely dense, flexible, and bladed vegetation to study the annulment effects of vegetation against the existing mining pit. Near-bed turbulence and sediment transport have increased in the test section in the presence of a mining pit. The increase in near-bed streamwise and transverse Reynolds shear stresses helped us understand the increased sediment movement in streamwise and lateral directions. The morphology of the test section showed increased riverbed erosion at the beginning of the test segment. The entire cross-section was levelled at the end of the test section, and aggradation was downstream of the test segment. In contrast, in the vegetated riverbank case, the initial profile of the bank was almost unchanged for the same discharge of flow and upstream sand pit. The sparse vegetation overperformed the intended negation effects. This study establishes that sparse vegetation would perform better in maintaining the channel morphology, which otherwise in dense vegetation would have faced a high erosion rate in the main channel while giving the same protection to the riverbanks.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140841923","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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
Effects of natural flood management woody dams on benthic macroinvertebrates and benthic metabolism in upland streams: Importance of wood-induced geomorphic changes 天然洪水管理木坝对高地溪流底栖大型无脊椎动物和底栖新陈代谢的影响:木材引起的地貌变化的重要性
IF 2.5 3区 环境科学与生态学
Ecohydrology Pub Date : 2024-04-28 DOI: 10.1002/eco.2654
Ho Wen Lo, Megan Klaar, Mark Smith, Clare Woulds
{"title":"Effects of natural flood management woody dams on benthic macroinvertebrates and benthic metabolism in upland streams: Importance of wood-induced geomorphic changes","authors":"Ho Wen Lo,&nbsp;Megan Klaar,&nbsp;Mark Smith,&nbsp;Clare Woulds","doi":"10.1002/eco.2654","DOIUrl":"10.1002/eco.2654","url":null,"abstract":"<p>Natural Flood Management (NFM) aims to reduce flood hazard by working with nature and is gaining prominence worldwide. One particular NFM technique involves the use of channel-spanning woody dams that maintain a clearance height above baseflow. These dams function by increasing channel roughness during high flows and by forcing excessive water onto the floodplain. Whether these dams provide additional benefits to nature remains unclear. While there are many existing studies on natural in-stream wood structures, very few have documented the impact of NFM woody dams in particular. This study adopted a multidisciplinary approach and a Before–After Control–Impact (BACI) research design to assess whether NFM woody dams installed in a small upland catchment had driven changes in benthic macroinvertebrate assemblages and benthic metabolic activities through the geomorphic changes that they had created. Statistical results indicate that macroinvertebrate density, richness, and diversity did not show any difference between stream reaches with and without NFM woody dams. The metrics were generally not related to grain-size parameters and volumes of sediments eroded or deposited. However, individual genera such as <i>Baetis</i> and <i>Rhithrogena</i> became more dominant in the control reach towards the end of the study period, likely due to the higher flow velocities and coarser sediments there resulting from the lack of flow resistance in the absence of NFM woody dams. Rates of benthic respiration (but not rates of photosynthesis) were consistently significantly higher in woody dam reaches than in control reaches, likely due to the presence of patches of finer sediments in the former.</p>","PeriodicalId":55169,"journal":{"name":"Ecohydrology","volume":"17 5","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/eco.2654","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140840467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}
引用次数: 0
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