Inland Waters最新文献_第10页

The effects of changes in diversity on phytoplankton community metabolism 多样性变化对浮游植物群落代谢的影响

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-03-01 DOI: 10.1080/20442041.2022.2040406

A. Parparov, G. Gal

{"title":"The effects of changes in diversity on phytoplankton community metabolism","authors":"A. Parparov, G. Gal","doi":"10.1080/20442041.2022.2040406","DOIUrl":"https://doi.org/10.1080/20442041.2022.2040406","url":null,"abstract":"ABSTRACT Changes in composition of phytoplankton communities cause drastic changes in functioning of aquatic ecosystems. In this study, we hypothesized that the shifts in composition of the phytoplankton community of Lake Kinneret induced notable shifts in the relationship between primary production and decomposition of organic matter in the lake ecosystem. To test this, we created an approach based on a statistical analysis of long-term dynamics of diversity indices and their relationships with potential perturbations: changes in lake water level, nutrient loads, and annual average epilimnetic temperature. Biodiversity of the algal community was estimated using Simpson’s Diversity Index and community-weighted mean trait value (functional diversity index). Specific community respiration and photosynthesis assimilation number were considered as the functional traits characterizing the role of phytoplankton in cycling organic matter. The observed temporal trends in the diversity indices provided estimates of the shift in the biotic community from large, relatively faster aerobic decomposing and slower photosynthesizing producers towards slower aerobic decomposing and faster photosynthesizing producers. These trends were confirmed by the results of direct determination of community respiration and (indirectly) by the reduced microbial activity in the epilimnetic waters of the lake.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48091503","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: 1

Influence of fisheries and shoreline management on limnological characteristics of three Missouri reservoirs 渔业和海岸线管理对密苏里州三座水库湖泊特征的影响

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-02-04 DOI: 10.1080/20442041.2022.2037991

J. Jones, D. Obrecht, R. North

{"title":"Influence of fisheries and shoreline management on limnological characteristics of three Missouri reservoirs","authors":"J. Jones, D. Obrecht, R. North","doi":"10.1080/20442041.2022.2037991","DOIUrl":"https://doi.org/10.1080/20442041.2022.2037991","url":null,"abstract":"ABSTRACT Landscape-level analyses based on land cover, morphology, and hydrology account for most of the cross-system variation in pelagic nutrients and suspended solids in Missouri reservoirs. They are based on geometric means, which reduce the influence of extreme temporal variation measured in individual reservoirs. This analysis of 3 conservation reservoirs, managed to benefit recreational fisheries, details how internal processes can alter nutrients, chlorophyll, mineral turbidity, and transparency in long-term (21–42 year) datasets, which contribute to temporal variation. Management practices include the addition of grass carp and herbicides to control nuisance macrophytes and shoreline stabilization with rock and water willow. Among these reservoirs, there is strong evidence that macrophyte removal can increase pelagic nutrients by >90%, resulting in a switch to plankton-dominated conditions (alternative states). In one case, eradication of aquatic vegetation increased mineral turbidity by >60%, which was reversed by reestablishing macrophytes and stabilizing the shoreline. This temporal series supports the modifications of phytoplankton–nutrient relations by mineral turbidity shown in state-wide analyses. Collectively, the long-term data show a significant increase in cyanobacteria biovolume and cyanotoxins, with maximum microcystin concentrations increasing as much as 20 times. Actively flipping lakes to plankton-dominated systems via fisheries management and shoreline stabilization practices has negative impacts on overall water quality, with implications for human and wildlife health.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44999553","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

Impacts of damming and climate change on the ecosystem structure of headwater streams: a case study from the Pyrenees 筑坝和气候变化对源流生态系统结构的影响——以比利牛斯山脉为例

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-28 DOI: 10.1080/20442041.2021.2021776

Alejandro López-de Sancha, Romero Roig, Iara Jiménez, A. Vila-Gispert, H. Guasch

{"title":"Impacts of damming and climate change on the ecosystem structure of headwater streams: a case study from the Pyrenees","authors":"Alejandro López-de Sancha, Romero Roig, Iara Jiménez, A. Vila-Gispert, H. Guasch","doi":"10.1080/20442041.2021.2021776","DOIUrl":"https://doi.org/10.1080/20442041.2021.2021776","url":null,"abstract":"ABSTRACT Climate change, damming, and metal pollution are among the main anthropogenic threats to headwater streams. We designed a case study to assess how these stressors impact the ecosystem structure of headwater streams by using the biofilm and macroinvertebrate communities of a Pyrenean stream. We observed a strong seasonal pattern in the stream that interacted with the analysed stressors by having synergistic, but also antagonistic, responses on the ecosystem structural parameters. Both damming and a decrease in precipitation reduced the water flow of the stream and increased its temperature, which promoted an increase in algal and macroinvertebrate biomass at the expense of the biodiversity of their communities, a situation expected to worsen in a climate change context. The decrease in precipitation also increased the concentration of metals and metalloids in the water column and in biofilms, but the water diversion from damming reduced their contributions downstream. The maintenance of an adequate ecological flow in dam-impounded streams is encouraged to overcome these impacts in the current climate change context. More field studies are needed to assess how multiple anthropogenic stressors interact and threaten the ecosystem integrity in a realistic and applied context.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42859860","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: 2

Temperature explains the formation of a metalimnetic oxygen minimum in a deep mesotrophic lake 温度解释了深中营养湖泊中金属氮氧最低值的形成

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-28 DOI: 10.1080/20442041.2022.2029318

C. McDonald, Mahta Naziri Saeed, D. Robertson, S. Prellwitz

{"title":"Temperature explains the formation of a metalimnetic oxygen minimum in a deep mesotrophic lake","authors":"C. McDonald, Mahta Naziri Saeed, D. Robertson, S. Prellwitz","doi":"10.1080/20442041.2022.2029318","DOIUrl":"https://doi.org/10.1080/20442041.2022.2029318","url":null,"abstract":"ABSTRACT Green Lake, a deep mesotrophic lake located in a primarily agricultural watershed in central Wisconsin, USA, has experienced annual metalimnetic oxygen minima since the early 20th century. However, the severity of the phenomenon has increased over time, and late-summer dissolved oxygen (DO) concentrations have typically been <3 mg L−1 in recent years. In situ, high-frequency observations of oxygen depletion at multiple depths reveal that while DO consumption during stratification occurs most rapidly in the metalimnion, there is synchrony between DO time series extending into the hypolimnion. A biochemical oxygen demand-based modeling approach suggests that much of the relationship between water depth and respiration rates can be explained by differences in water temperature. The amount of labile organic matter present throughout the water column at the onset of stratification seems to be a primary determinant of the severity of the annual metalimnetic DO minimum in late summer. Productivity has increased in the lake as a result of increased nutrient loading and is the likely driver of the decrease in minimum DO concentrations. In addition, the onset and duration of stratification is an important factor in determining the severity of the DO minimum.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45210875","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: 2

The limnological response of Arctic deltaic lakes to alterations in flood regime 北极三角洲湖泊对洪水变化的湖沼学响应

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-28 DOI: 10.1080/20442041.2022.2030628

Ryan W. Scott, Sapna Sharma, Xiaowa Wang, R. Quinlan

{"title":"The limnological response of Arctic deltaic lakes to alterations in flood regime","authors":"Ryan W. Scott, Sapna Sharma, Xiaowa Wang, R. Quinlan","doi":"10.1080/20442041.2022.2030628","DOIUrl":"https://doi.org/10.1080/20442041.2022.2030628","url":null,"abstract":"ABSTRACT Arctic freshwaters are being rapidly altered by global climate change with consequences to hydrology, biogeochemistry, and ecology, but in many cases the trajectory of these changes is poorly understood. We collected a unique 5-year time series of major ion, nutrient, and trace metal data from lakes in the Mackenzie Delta (NT, Canada) to examine limnological changes during a period of variable flood conditions, including years of recent historic high and low peak river levels. Previous work in the Mackenzie Delta has established that lake water chemistry is strongly related to connection time with the river during the period of spring ice-jam flooding or via channel connections through the growing season. We show that differences in peak spring water levels explain differences in lake chemistry in lakes isolated from the channel during the summer. Isolated, macrophyte-rich lakes in the Mackenzie Delta have been shown to be CO2 absorbers during summer. We demonstrate a response to alterations in flood regime by variables related to macrophyte productivity in isolated lakes with the greatest connectivity to the river that suggests productivity declines with increasing connection time. The connectivity of low-elevation lakes, which represent a majority of lake number and area in the Mackenzie Delta, has been projected to increase with climate change. Our work suggests that an increase in connection time may decrease the macrophyte productivity of these lakes, with potential consequences to the CO2 balance of individual lakes and the Mackenzie Delta as a whole.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42265673","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

First evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA) 怀俄明州大提顿国家公园杰克逊湖现存淡水海绵动物群的首次证据（美国）

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-28 DOI: 10.1080/20442041.2022.2035190

G. Rasbold, U. Pinheiro, Leandro Domingos-Luz, John Dilworth, J. Thigpen, L. Pessenda, M. McGlue

{"title":"First evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA)","authors":"G. Rasbold, U. Pinheiro, Leandro Domingos-Luz, John Dilworth, J. Thigpen, L. Pessenda, M. McGlue","doi":"10.1080/20442041.2022.2035190","DOIUrl":"https://doi.org/10.1080/20442041.2022.2035190","url":null,"abstract":"ABSTRACT Skeletal remains of freshwater sponges are important microfossils that may be preserved in the sediments of inland waters, but much is still unknown about the sponge fauna of the Nearctic, which limits their use in paleoenvironmental reconstructions. Here, we report the first evidence of an extant freshwater sponge fauna in Jackson Lake, Grand Teton National Park, Wyoming (USA). Two sponge species were identified living in shallow littoral and shoreline environments: Eunapius fragilis (Leidy 1851) and Ephydatia muelleri (Lieberkühn 1856). The spicules of Eunapius fragilis present high morphological variability, in contrast to gemmuloscleres reported in specimens from lakes and rivers in southern South America and eastern North America. Ephydatia muelleri also exhibits morphological differences in comparison to published examples, chiefly related to the spines on megascleres. The megascleres of Ephydatia muelleri are straight or slightly curved, sharpening gradually toward the apices, with completely smooth surfaces (13%), surfaces with minimal spines (65%), or highly spined surfaces in the central area (22%). These morphological differences in the Ephydatia muelleri megascleres suggest the potential for ecophenotypic effects in Jackson Lake. Furthermore, the morphological and ecological variability of Eunapius fragilis and Ephydatia muelleri observed in Jackson Lake suggest the need for further studies of the Nearctic to understand if a species complex exists or if morphological dissimilarities are indicative of true taxonomic differences and therefore multiple new species. This study expands the biogeography of freshwater sponges and provides the first documentation of benthic sessile filter feeders in Jackson Lake, a key source of ecosystem services.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45288712","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: 1

Feedback between climate change and eutrophication: revisiting the allied attack concept and how to strike back 气候变化和富营养化之间的反馈：重新审视联合攻击概念以及如何反击

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-28 DOI: 10.1080/20442041.2022.2029317

M. Meerhoff, J. Audet, T. Davidson, L. De Meester, S. Hilt, S. Kosten, Zhengwen Liu, N. Mazzeo, H. Paerl, M. Scheffer, E. Jeppesen

{"title":"Feedback between climate change and eutrophication: revisiting the allied attack concept and how to strike back","authors":"M. Meerhoff, J. Audet, T. Davidson, L. De Meester, S. Hilt, S. Kosten, Zhengwen Liu, N. Mazzeo, H. Paerl, M. Scheffer, E. Jeppesen","doi":"10.1080/20442041.2022.2029317","DOIUrl":"https://doi.org/10.1080/20442041.2022.2029317","url":null,"abstract":"ABSTRACT Despite its well-established negative impacts on society and biodiversity, eutrophication continues to be one of the most pervasive anthropogenic influences along the freshwater to marine continuum. The interaction between eutrophication and climate change, particularly climate warming, was explicitly focused upon a decade ago by Brian Moss and others in “Allied attack: climate change and eutrophication,” which called for an integrated response to both problems, given their apparent synergy. In this review, we summarise advances in the theoretical framework and empirical research on this issue and analyse the current understanding of the major drivers and mechanisms by which climate change can enhance eutrophication, and vice versa, with a particular focus on shallow lakes. Climate change can affect nutrient loading through changes at the catchment and landscape levels by affecting hydrological patterns and fire frequency and through temperature effects on nutrient cycling. Biotic communities and their interactions can also be directly and indirectly affected by climate change, leading to an overall weakening of resilience to eutrophication impacts. Increasing empirical evidence now indicates several mechanisms by which eutrophying aquatic systems can increasingly act as important sources of greenhouse gases to the atmosphere, particularly methane. We also highlight potential feedback among eutrophication, cyanobacterial blooms, and climate change. Facing both challenges simultaneously is more pressing than ever. Meaningful and strong measures at the landscape and waterbody levels are therefore required if we are to ensure ecosystem resilience and safe water supply, conserve biodiversity, and decrease the carbon footprint of freshwaters.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42438514","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: 28

Modelling how bottom-up and top-down processes control the major functional groups of biota in a large temperate shallow lake 模拟一个大型温带浅湖中自下而上和自上而下的过程如何控制生物群的主要功能群

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-28 DOI: 10.1080/20442041.2022.2031813

Upendra Bhele, Burak Öğlü, T. Feldmann, P. Bernotas, H. Agasild, P. Zingel, P. Nõges, T. Nõges, F. Cremona

{"title":"Modelling how bottom-up and top-down processes control the major functional groups of biota in a large temperate shallow lake","authors":"Upendra Bhele, Burak Öğlü, T. Feldmann, P. Bernotas, H. Agasild, P. Zingel, P. Nõges, T. Nõges, F. Cremona","doi":"10.1080/20442041.2022.2031813","DOIUrl":"https://doi.org/10.1080/20442041.2022.2031813","url":null,"abstract":"ABSTRACT Ecosystem models that measure the impact of quantitative interactions between trophic levels are widely used tools in ecosystem studies and fishery management. We constructed a mass-balance trophic model using an Ecopath with Ecosim (EwE) modelling suite for large shallow Lake Võrtsjärv, Estonia. The model was calibrated for 36 years (1983–2018) and included 23 functional groups. We examined trophic relationships, functional group interactions, energy fluxes, and keystone groups having a high impact on the ecosystem relative to their biomass. We tested 6 hypothetical scenarios based on future biomass changes for the major functional groups (phytoplankton, zooplankton, macrozoobenthos, piscivorous fish, and bream) for 20 years. The output of the predictive scenarios showed that the biomass changes of planktonic groups would affect the whole food web. Among consumers, macrozoobenthos was crucial for the food web balance because a reduction of their biomass would also reduce the biomass of the fish community. Changes in fish catches would cause minimal biomass difference in other groups. While increased fishing pressure on large piscivores would have a marked effect on the rest of the food web, the reduction of nonpiscivorous fish like bream would have little effect. The results suggested a positive relationship between the biomass of small phytoplankton and fish, alluding to the prevalence of bottom-up trophic processes. These outcomes could be helpful for assessing trophic dynamics in shallow lakes and important aspects for fisheries and ecosystem management.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47912749","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: 2

Imperfect slope measurements drive overestimation in a geometric cone model of lake and reservoir depth 不完善的坡度测量导致湖泊和水库深度几何锥模型的高估

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-14 DOI: 10.1080/20442041.2021.2006553

Jemma Stachelek, Patrick J. Hanly, P. Soranno

{"title":"Imperfect slope measurements drive overestimation in a geometric cone model of lake and reservoir depth","authors":"Jemma Stachelek, Patrick J. Hanly, P. Soranno","doi":"10.1080/20442041.2021.2006553","DOIUrl":"https://doi.org/10.1080/20442041.2021.2006553","url":null,"abstract":"ABSTRACT Lake and reservoir (waterbody) depth is a critical characteristic that influences many important ecological processes. Unfortunately, depth measurements are labor-intensive to gather and are only available for a small fraction of waterbodies globally. Therefore, scientists have tried to predict depth from characteristics easily obtained for all waterbodies, such as surface area or the slope of the surrounding land. One approach for predicting waterbody depth simulates basins using a geometric cone model where the nearshore land slope and distance to the center of the waterbody are assumed to be representative proxies for in-lake slope and distance to the deepest point respectively. We tested these assumptions using bathymetry data from ∼5000 lakes and reservoirs to examine whether differences in waterbody type or shape influenced depth prediction error. We found that nearshore land slope was not representative of in-lake slope, and using it for prediction increases error substantially relative to models using true in-lake slope for all waterbody types and shapes. Predictions were biased toward overprediction in concave waterbodies (i.e., bowl-shaped; up to 18% of the study population) and reservoir waterbodies (up to 30% of the study population). Despite this systematic overprediction, model errors were fewer (in absolute and relative terms, irrespective of any specific slope covariate) for concave than convex waterbodies, suggesting the geometric cone model is an adequate representation of depth for these waterbodies. But because convex waterbodies are far more common (>72% of our study population), minimizing overall depth prediction error remains a challenge.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43685529","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: 3

Nitrogen and phosphorus removal by fishing in a large freshwater lake (Lake Balaton, Hungary) 在一个大型淡水湖(匈牙利巴拉顿湖)捕鱼去除氮和磷

IF 3.1 3区环境科学与生态学

Inland Waters Pub Date : 2022-01-14 DOI: 10.1080/20442041.2021.1991754

G. Boros

{"title":"Nitrogen and phosphorus removal by fishing in a large freshwater lake (Lake Balaton, Hungary)","authors":"G. Boros","doi":"10.1080/20442041.2021.1991754","DOIUrl":"https://doi.org/10.1080/20442041.2021.1991754","url":null,"abstract":"ABSTRACT Fish biomass can serve as a large temporary sink of limiting nutrients, and thus fishing may represent an important anthropogenic nutrient efflux from aquatic ecosystems. However, the significance of this type of nutrient removal has rarely been evaluated for freshwater lakes. The aim of this study was to reveal how fishing contributed to the nutrient output from Lake Balaton (Hungary), the largest lake in Central Europe. The results show that net fish removal (the difference between the removed and stocked fish biomass) returned to land on average (standard deviation) 3.1 (0.3) tonnes of phosphorus (P) and 10.2 (1.1) tonnes of nitrogen (N) per year from Lake Balaton between 2017 and 2019, which is equivalent to a removal rate of 0.05 (0) kg ha−1 yr−1 P and 0.17 (0.02) kg ha−1 yr−1 N. These rates corresponded to 7.5% (1.5%) of the annual external P and 1.4% (0.6%) of the annual N loads from the inflowing watercourses. These findings suggest that fish harvest was moderately effective at offsetting external loading during the observed period. To mitigate the ongoing within-lake nutrient accumulation, more intensive selective fishing should be promoted in Lake Balaton, along with reconsideration of regulations on fishing practices.","PeriodicalId":49061,"journal":{"name":"Inland Waters","volume":null,"pages":null},"PeriodicalIF":3.1,"publicationDate":"2022-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48691772","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: 2