Liming-induced taxonomic homogenization of chironomid assemblages in Scandinavian lakes as unraveled by paleolimnological reconstructions.

IF 8 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Journal of Environmental Management Pub Date : 2025-01-01 Epub Date: 2024-12-14 DOI:10.1016/j.jenvman.2024.123546
Simon Belle, Stina Drakare, Johnson Richard K
{"title":"Liming-induced taxonomic homogenization of chironomid assemblages in Scandinavian lakes as unraveled by paleolimnological reconstructions.","authors":"Simon Belle, Stina Drakare, Johnson Richard K","doi":"10.1016/j.jenvman.2024.123546","DOIUrl":null,"url":null,"abstract":"<p><p>In the 1980s, liming became a large-scale, governmentally supported restoration program implemented by many countries to mitigate the effects of acidification of freshwaters. Despite some 50 years of liming of thousands of lakes and streams, its efficacy remains largely debated. This study is the first of its kind to use paleolimnological reconstructions using both subfossil chironomid assemblages and their carbon stable isotopic composition to compare the ecological trajectories of limed and control (unlimed) lakes over the last 100 years in order to unravel the effects of liming on Scandinavian lakes. Our study revealed strong effects of liming on lake water chemistry and sedimentary characteristics of limed lakes. Overall, higher present-day pH values were observed in lake water of the limed lakes (average pH of 6.7 ± 0.2) than in control lakes (average pH of 5.9 ± 0.5), and the pH variability was much lower among limed lakes. A decrease in the dissimilarity of the chironomid assemblages among limed lakes was also observed as liming progressed, and the degree of dissimilarity after liming was largely lower than pre-acidified levels. This pattern suggests that liming favoured the selection of similar chironomid taxa in limed lakes, thus providing complementary empirical evidences about the effects of liming on aquatic communities through taxonomic homogenization of chironomid assemblages. As the ecological trajectories of limed and control lakes strongly differed, our study also questions the impact of liming on the resilience of Scandinavian lakes and, importantly, their ability to cope with ongoing and future climatic and environmental changes. Finally, isotope-based results indicated that liming masks potential complex effects on carbon flows at the base of the food web by shifting algal carbon isotopic baselines. The use of carbon stable isotope analysis of chironomid head capsules to study the effects of liming on energy flows within lake food webs is, therefore, not suitable.</p>","PeriodicalId":356,"journal":{"name":"Journal of Environmental Management","volume":"373 ","pages":"123546"},"PeriodicalIF":8.0000,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Environmental Management","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1016/j.jenvman.2024.123546","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/12/14 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
引用次数: 0

Abstract

In the 1980s, liming became a large-scale, governmentally supported restoration program implemented by many countries to mitigate the effects of acidification of freshwaters. Despite some 50 years of liming of thousands of lakes and streams, its efficacy remains largely debated. This study is the first of its kind to use paleolimnological reconstructions using both subfossil chironomid assemblages and their carbon stable isotopic composition to compare the ecological trajectories of limed and control (unlimed) lakes over the last 100 years in order to unravel the effects of liming on Scandinavian lakes. Our study revealed strong effects of liming on lake water chemistry and sedimentary characteristics of limed lakes. Overall, higher present-day pH values were observed in lake water of the limed lakes (average pH of 6.7 ± 0.2) than in control lakes (average pH of 5.9 ± 0.5), and the pH variability was much lower among limed lakes. A decrease in the dissimilarity of the chironomid assemblages among limed lakes was also observed as liming progressed, and the degree of dissimilarity after liming was largely lower than pre-acidified levels. This pattern suggests that liming favoured the selection of similar chironomid taxa in limed lakes, thus providing complementary empirical evidences about the effects of liming on aquatic communities through taxonomic homogenization of chironomid assemblages. As the ecological trajectories of limed and control lakes strongly differed, our study also questions the impact of liming on the resilience of Scandinavian lakes and, importantly, their ability to cope with ongoing and future climatic and environmental changes. Finally, isotope-based results indicated that liming masks potential complex effects on carbon flows at the base of the food web by shifting algal carbon isotopic baselines. The use of carbon stable isotope analysis of chironomid head capsules to study the effects of liming on energy flows within lake food webs is, therefore, not suitable.

古气候学重建揭示的斯堪的纳维亚湖泊中由限制引起的摇蚊群分类同质化问题
20世纪80年代,石灰化成为一项由政府支持的大规模恢复计划,由许多国家实施,以减轻淡水酸化的影响。尽管在过去的50年里,成千上万的湖泊和溪流都被污染了,但它的功效仍然存在很大的争议。本研究首次使用古湖泊学重建,使用亚化石chironomid组合及其碳稳定同位素组成来比较过去100年来石灰化和对照(未石灰化)湖泊的生态轨迹,以揭示石灰化对斯堪的纳维亚湖泊的影响。研究揭示了石灰化对湖泊水体化学和沉积特征的强烈影响。总体而言,石灰湖泊的湖水现今pH值(平均pH值为6.7±0.2)高于对照湖泊(平均pH值为5.9±0.5),而石灰湖泊之间的pH变异性要小得多。随着石灰化进程的推进,湖泊间摇尾鱼组合的差异性也逐渐减小,且不同程度明显低于酸化前水平。这一模式表明石灰化有利于湖泊中相似的手摇鱼类群的选择,从而为石灰化通过手摇鱼类群的分类均一化对水生群落的影响提供了补充的经验证据。由于石灰湖和对照湖的生态轨迹截然不同,我们的研究还质疑了石灰化对斯堪的纳维亚湖泊恢复力的影响,更重要的是,它们应对当前和未来气候和环境变化的能力。最后,基于同位素的结果表明,石灰化通过改变藻类碳同位素基线,掩盖了对食物网底部碳流动的潜在复杂影响。因此,利用手摇鱼头囊的碳稳定同位素分析来研究石灰化对湖泊食物网能量流动的影响是不合适的。
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 求助全文
来源期刊
Journal of Environmental Management
Journal of Environmental Management 环境科学-环境科学
CiteScore
13.70
自引率
5.70%
发文量
2477
审稿时长
84 days
期刊介绍: The Journal of Environmental Management is a journal for the publication of peer reviewed, original research for all aspects of management and the managed use of the environment, both natural and man-made.Critical review articles are also welcome; submission of these is strongly encouraged.
×
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
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
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 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信