Fish functional biotic simplification in a Neotropical reservoir: An approach from the ichthyoplankton

IF 1.6 3区 农林科学 Q3 FISHERIES Ecology of Freshwater Fish Pub Date : 2023-06-05 DOI:10.1111/eff.12729
Tatiane Mary Gogola, Pedro Rogério Leandro da Silva, Anderson Luiz Maciel, Dirceu Baumgartner, Pitágoras Augusto Piana, Paulo Vanderlei Sanches
{"title":"Fish functional biotic simplification in a Neotropical reservoir: An approach from the ichthyoplankton","authors":"Tatiane Mary Gogola,&nbsp;Pedro Rogério Leandro da Silva,&nbsp;Anderson Luiz Maciel,&nbsp;Dirceu Baumgartner,&nbsp;Pitágoras Augusto Piana,&nbsp;Paulo Vanderlei Sanches","doi":"10.1111/eff.12729","DOIUrl":null,"url":null,"abstract":"<p>Ecosystem services provided by communities are related to the diversity of functional traits, and biotic functional simplification occurs when this diversity is reduced. Thus, we used the approach of functional indices, applied to the abundance of fish larvae and traits of the spawning stock, to evaluate the spatial and temporal variations in the functional diversity of the fish community of a Neotropical reservoir. The following hypotheses were tested: (i) different environmental conditions between reproductive periods lead to temporal variations in the functional diversity of the community, and (ii) the spatial heterogeneity (longitudinal and lateral) of the environmental conditions formed in the reservoir causes functional biotic simplification to occur from lotic towards lentic areas since the original community was formed by rheophilic species. Larval collections were carried out monthly, at night, between October and March, from 2009 to 2016, with plankton nets equipped with a flowmeter in nine sample areas categorised into three longitudinal zones (fluvial-FLU, transition-TRA and lacustrine-LAC) and three sides (upper-UPP, middle-MID and lower-LOW). Water samples were obtained to measure the temperature and turbidity. Precipitation and reservoir quotas were obtained from official agencies. After the identification of captured larvae, we determined which species were present and used the functional traits of the adults (parental stock), obtained from specialised literature, and functional richness (FRic) and its corresponding standardised effect size (SES.FRic) were computed. The spatiotemporal variations in these indices were evaluated through the two-way block factorial MANOVA/ANOVA. Their association with environmental variables was inferred through multiple linear regression models. Altogether, 51,995 larvae were captured with the highest abundance in the period V, longitudinally in LAC and TRA and laterally in LOW. Among these, the functional indices were higher in periods IV and V. The highest values of FRic occurred longitudinally in FLU and laterally in LOW. Among the abiotic conditions, rainfall and water temperature were the most influential variables over functional indices and total larvae abundance. The results indicate that fish reproduction is linked to spatiotemporal variations in abiotic conditions confirming our first hypothesis. The second hypothesis was partially supported because functional biotic simplification was observed in the longitudinal gradient, with reductions in FRic in LAC. However, this reduction was not observed in the lateral gradient. We showed that the temporal variability of abiotic conditions is important for the high functional diversity of reservoirs.</p>","PeriodicalId":11422,"journal":{"name":"Ecology of Freshwater Fish","volume":null,"pages":null},"PeriodicalIF":1.6000,"publicationDate":"2023-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecology of Freshwater Fish","FirstCategoryId":"97","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1111/eff.12729","RegionNum":3,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"FISHERIES","Score":null,"Total":0}
引用次数: 0

Abstract

Ecosystem services provided by communities are related to the diversity of functional traits, and biotic functional simplification occurs when this diversity is reduced. Thus, we used the approach of functional indices, applied to the abundance of fish larvae and traits of the spawning stock, to evaluate the spatial and temporal variations in the functional diversity of the fish community of a Neotropical reservoir. The following hypotheses were tested: (i) different environmental conditions between reproductive periods lead to temporal variations in the functional diversity of the community, and (ii) the spatial heterogeneity (longitudinal and lateral) of the environmental conditions formed in the reservoir causes functional biotic simplification to occur from lotic towards lentic areas since the original community was formed by rheophilic species. Larval collections were carried out monthly, at night, between October and March, from 2009 to 2016, with plankton nets equipped with a flowmeter in nine sample areas categorised into three longitudinal zones (fluvial-FLU, transition-TRA and lacustrine-LAC) and three sides (upper-UPP, middle-MID and lower-LOW). Water samples were obtained to measure the temperature and turbidity. Precipitation and reservoir quotas were obtained from official agencies. After the identification of captured larvae, we determined which species were present and used the functional traits of the adults (parental stock), obtained from specialised literature, and functional richness (FRic) and its corresponding standardised effect size (SES.FRic) were computed. The spatiotemporal variations in these indices were evaluated through the two-way block factorial MANOVA/ANOVA. Their association with environmental variables was inferred through multiple linear regression models. Altogether, 51,995 larvae were captured with the highest abundance in the period V, longitudinally in LAC and TRA and laterally in LOW. Among these, the functional indices were higher in periods IV and V. The highest values of FRic occurred longitudinally in FLU and laterally in LOW. Among the abiotic conditions, rainfall and water temperature were the most influential variables over functional indices and total larvae abundance. The results indicate that fish reproduction is linked to spatiotemporal variations in abiotic conditions confirming our first hypothesis. The second hypothesis was partially supported because functional biotic simplification was observed in the longitudinal gradient, with reductions in FRic in LAC. However, this reduction was not observed in the lateral gradient. We showed that the temporal variability of abiotic conditions is important for the high functional diversity of reservoirs.

查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
新热带水库中鱼类功能生物简化:来自浮游鱼的研究
群落提供的生态系统服务与功能性状的多样性有关,当这种多样性减少时,就会发生生物功能的简化。为此,我们采用功能指数的方法,结合鱼苗丰度和产卵种群特征,对新热带水库鱼类群落功能多样性的时空变化进行了评价。对以下假设进行了验证:(1)不同繁殖期的环境条件导致群落功能多样性的时间变化;(2)水库中形成的环境条件的空间异质性(纵向和横向)导致原始群落由嗜流物种形成,从发生地到发生地发生了功能生物简化。2009年至2016年,在10月至3月期间每月夜间进行幼虫采集,浮游生物网配备流量计,在9个样本区域进行采集,分为三个纵向区(河流- flu,过渡- tra和湖泊- lac)和三个侧面(上-上、中-中和下-低)。取水样测量温度和浊度。降水和水库定额是从官方机构获得的。在对捕获的幼虫进行鉴定后,利用专业文献中获得的成虫(亲本种群)的功能性状,计算了功能丰富度(frc)及其相应的标准化效应量(sds . frc)。通过双向块因子方差分析(MANOVA/ANOVA)评估这些指标的时空变化。通过多元线性回归模型推断其与环境变量的关联。共捕获51,995只幼虫,丰度最高的是V期,纵向为LAC期和TRA期,横向为LOW期。其中,功能指数在IV期和v期较高。FRic的最大值出现在FLU的纵向和LOW的横向。在非生物条件中,降雨量和水温是影响功能指标和总幼虫丰度的主要变量。结果表明,鱼类繁殖与非生物条件下的时空变化有关,证实了我们的第一个假设。第二种假设得到了部分支持,因为在纵向梯度中观察到功能性生物简化,LAC中FRic减少。然而,在侧梯度中没有观察到这种减少。研究表明,非生物条件的时间变异性对水库的高功能多样性具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 去求助
来源期刊
Ecology of Freshwater Fish
Ecology of Freshwater Fish 农林科学-海洋与淡水生物学
CiteScore
4.10
自引率
0.00%
发文量
45
审稿时长
12-24 weeks
期刊介绍: Ecology of Freshwater Fish publishes original contributions on all aspects of fish ecology in freshwater environments, including lakes, reservoirs, rivers, and streams. Manuscripts involving ecologically-oriented studies of behavior, conservation, development, genetics, life history, physiology, and host-parasite interactions are welcomed. Studies involving population ecology and community ecology are also of interest, as are evolutionary approaches including studies of population biology, evolutionary ecology, behavioral ecology, and historical ecology. Papers addressing the life stages of anadromous and catadromous species in estuaries and inshore coastal zones are considered if they contribute to the general understanding of freshwater fish ecology. Theoretical and modeling studies are suitable if they generate testable hypotheses, as are those with implications for fisheries. Manuscripts presenting analyses of published data are considered if they produce novel conclusions or syntheses. The journal publishes articles, fresh perspectives, and reviews and, occasionally, the proceedings of conferences and symposia.
期刊最新文献
Issue Information Correction to ‘The influence of flow on movement of a headwater specialist in an intermittent urban headwater stream’ Introduction to the Proceedings of the Sixth ‘Advances in the Population Dynamics of Stream Salmonids’ Symposium Dispersal and gene flow in anadromous salmonids: A systematic review Ichthyoplankton dynamics in the Brazilian Pantanal: Contribution of an important tributary and maintenance of connectivity
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1