Strengthening of negative density dependence mediates population decline at high temperatures

IF 4.4 2区 环境科学与生态学 Q1 ECOLOGY
Ecology Pub Date : 2025-03-03 DOI:10.1002/ecy.70030
Lillie Stockseth, Zoey Neale, Volker H. W. Rudolf
{"title":"Strengthening of negative density dependence mediates population decline at high temperatures","authors":"Lillie Stockseth,&nbsp;Zoey Neale,&nbsp;Volker H. W. Rudolf","doi":"10.1002/ecy.70030","DOIUrl":null,"url":null,"abstract":"<p>While temperature is well known to affect many life history traits of ectothermic organisms, any attempt to scale up these individual-level processes to population-level consequences must assume a relationship between temperature and the strength of per capita density dependence. Yet, theory has made contrasting predictions about this relationship, and we still need clear experimental tests to determine which relationship is realized in natural systems, especially in heterotrophs. Here, we experimentally isolated and quantified the thermal response of density dependence from the population dynamics of the herbivore <i>Daphnia pulex</i>. We show that the strength of negative density dependence increased linearly with temperature, doubling every 7°C, while the intrinsic growth rate of increase showed a humped shape relationship. This difference caused a humped-shaped relationship of carrying capacity with temperature, with a dramatic 50% decline at the highest temperature. The results provide a sorely needed test of theory and highlight the importance of accounting for thermal responses of indirect effects that only emerge at the population level when forecasting the effects of global warming. While warming temperatures may benefit the individual (via increased growth and reproduction), our results reveal that warming still can be a detriment to the population by strengthening density-dependent processes.</p>","PeriodicalId":11484,"journal":{"name":"Ecology","volume":"106 3","pages":""},"PeriodicalIF":4.4000,"publicationDate":"2025-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/ecy.70030","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecology","FirstCategoryId":"93","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/ecy.70030","RegionNum":2,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ECOLOGY","Score":null,"Total":0}
引用次数: 0

Abstract

While temperature is well known to affect many life history traits of ectothermic organisms, any attempt to scale up these individual-level processes to population-level consequences must assume a relationship between temperature and the strength of per capita density dependence. Yet, theory has made contrasting predictions about this relationship, and we still need clear experimental tests to determine which relationship is realized in natural systems, especially in heterotrophs. Here, we experimentally isolated and quantified the thermal response of density dependence from the population dynamics of the herbivore Daphnia pulex. We show that the strength of negative density dependence increased linearly with temperature, doubling every 7°C, while the intrinsic growth rate of increase showed a humped shape relationship. This difference caused a humped-shaped relationship of carrying capacity with temperature, with a dramatic 50% decline at the highest temperature. The results provide a sorely needed test of theory and highlight the importance of accounting for thermal responses of indirect effects that only emerge at the population level when forecasting the effects of global warming. While warming temperatures may benefit the individual (via increased growth and reproduction), our results reveal that warming still can be a detriment to the population by strengthening density-dependent processes.

Abstract Image

负密度依赖性的加强介导了高温下的种群数量下降
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
Ecology
Ecology 环境科学-生态学
CiteScore
8.30
自引率
2.10%
发文量
332
审稿时长
3 months
期刊介绍: Ecology publishes articles that report on the basic elements of ecological research. Emphasis is placed on concise, clear articles documenting important ecological phenomena. The journal publishes a broad array of research that includes a rapidly expanding envelope of subject matter, techniques, approaches, and concepts: paleoecology through present-day phenomena; evolutionary, population, physiological, community, and ecosystem ecology, as well as biogeochemistry; inclusive of descriptive, comparative, experimental, mathematical, statistical, and interdisciplinary approaches.
×
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