Seasonal variation in thermal tolerance and hypoxia tolerance of a threatened minnow and a non-imperilled congener: a cautionary tale for surrogate species in conservation.

IF 2.6 3区 环境科学与生态学 Q2 BIODIVERSITY CONSERVATION Conservation Physiology Pub Date : 2024-10-16 eCollection Date: 2024-01-01 DOI:10.1093/conphys/coae071
Jessica E Reemeyer, Dominique Rumball, Nicholas E Mandrak, Lauren J Chapman
{"title":"Seasonal variation in thermal tolerance and hypoxia tolerance of a threatened minnow and a non-imperilled congener: a cautionary tale for surrogate species in conservation.","authors":"Jessica E Reemeyer, Dominique Rumball, Nicholas E Mandrak, Lauren J Chapman","doi":"10.1093/conphys/coae071","DOIUrl":null,"url":null,"abstract":"<p><p>Freshwater organisms face multiple threats to their ecosystems, including warming associated with climate change and low dissolved oxygen (environmental hypoxia), which are both increasing in frequency and extent in freshwater systems. Understanding tolerance thresholds for these environmental stressors as well as the plasticity of responses is the key for informing the conservation of imperilled species. Direct measurement of imperilled species can be difficult, and the use of surrogate (non-imperilled but closely related) species has been proposed as a remedy, but the degree to which surrogate data are representative of the imperilled species has not been widely validated. In this study, we measured physiological performance of two species: one federally listed as Threatened in Canada (Pugnose Shiner, <i>Miniellus anogenus</i>) and a non-imperilled congener (Blackchin Shiner, <i>Miniellus heterodon</i>). Hypoxia tolerance (critical oxygen tension and loss of equilibrium) and upper thermal tolerance (CT<sub>max</sub>) were measured streamside over a period of 5 months. We found that the Threatened Pugnose Shiner had lower tolerance to both elevated temperature and hypoxia than the non-imperilled Blackchin Shiner. The species also differed in their responses to environmental dissolved oxygen (DO). CT<sub>max</sub> of Pugnose Shiner had a positive relationship with DO such that CT<sub>max</sub> was lowered when environmental DO was low, whereas there was no effect of DO on CT<sub>max</sub> of Blackchin Shiner. Blackchin Shiner also showed plasticity of hypoxia tolerance in response to changes in environmental DO, while Pugnose Shiner showed little plasticity. We conclude that Pugnose Shiner may be more sensitive to heat waves and hypoxia associated with climate change. We also assert that researchers should be cautious when using surrogate species to inform tolerance limits of imperilled species and highlight the value of measuring imperilled species directly when possible.</p>","PeriodicalId":54331,"journal":{"name":"Conservation Physiology","volume":null,"pages":null},"PeriodicalIF":2.6000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11482009/pdf/","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Conservation Physiology","FirstCategoryId":"93","ListUrlMain":"https://doi.org/10.1093/conphys/coae071","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2024/1/1 0:00:00","PubModel":"eCollection","JCR":"Q2","JCRName":"BIODIVERSITY CONSERVATION","Score":null,"Total":0}
引用次数: 0

Abstract

Freshwater organisms face multiple threats to their ecosystems, including warming associated with climate change and low dissolved oxygen (environmental hypoxia), which are both increasing in frequency and extent in freshwater systems. Understanding tolerance thresholds for these environmental stressors as well as the plasticity of responses is the key for informing the conservation of imperilled species. Direct measurement of imperilled species can be difficult, and the use of surrogate (non-imperilled but closely related) species has been proposed as a remedy, but the degree to which surrogate data are representative of the imperilled species has not been widely validated. In this study, we measured physiological performance of two species: one federally listed as Threatened in Canada (Pugnose Shiner, Miniellus anogenus) and a non-imperilled congener (Blackchin Shiner, Miniellus heterodon). Hypoxia tolerance (critical oxygen tension and loss of equilibrium) and upper thermal tolerance (CTmax) were measured streamside over a period of 5 months. We found that the Threatened Pugnose Shiner had lower tolerance to both elevated temperature and hypoxia than the non-imperilled Blackchin Shiner. The species also differed in their responses to environmental dissolved oxygen (DO). CTmax of Pugnose Shiner had a positive relationship with DO such that CTmax was lowered when environmental DO was low, whereas there was no effect of DO on CTmax of Blackchin Shiner. Blackchin Shiner also showed plasticity of hypoxia tolerance in response to changes in environmental DO, while Pugnose Shiner showed little plasticity. We conclude that Pugnose Shiner may be more sensitive to heat waves and hypoxia associated with climate change. We also assert that researchers should be cautious when using surrogate species to inform tolerance limits of imperilled species and highlight the value of measuring imperilled species directly when possible.

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
一种濒危鲦鱼和一种非鲦鱼同系物的耐热性和耐缺氧性的季节性变化:保护代用物种的警示。
淡水生物的生态系统面临着多重威胁,包括与气候变化相关的气候变暖和低溶解氧(环境缺氧),这两种因素在淡水系统中出现的频率和程度都在增加。了解对这些环境压力的耐受阈值以及反应的可塑性是为保护濒危物种提供信息的关键。直接测量濒危物种可能比较困难,有人提出使用替代物种(非濒危但密切相关)作为补救措施,但替代物种的数据在多大程度上能代表濒危物种尚未得到广泛验证。在这项研究中,我们测量了两个物种的生理表现:一个是被联邦列为加拿大濒危物种的帕格诺斯水蚤(Pugnose Shiner, Miniellus anogenus),另一个是非濒危物种的同系物(黑颏水蚤(Blackchin Shiner, Miniellus heterodon))。在 5 个月的时间里,我们在溪边测量了缺氧耐受性(临界氧张力和失去平衡)和上热耐受性(CTmax)。我们发现,濒危的帕格诺什纳鱼对温度升高和缺氧的耐受性均低于非濒危的黑颏什纳鱼。这些物种对环境溶解氧(DO)的反应也不同。八钩鱼的 CTmax 与溶解氧呈正相关,当环境溶解氧较低时,CTmax 会降低,而溶解氧对黑琴鱼的 CTmax 没有影响。黑棘鲷还表现出耐受缺氧能力对环境溶解氧变化的可塑性,而八钩鲱的可塑性很小。我们的结论是,巴氏湘鲈可能对与气候变化相关的热浪和缺氧更为敏感。我们还认为,研究人员在使用替代物种来告知濒危物种的耐受极限时应谨慎,并强调在可能的情况下直接测量濒危物种的价值。
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
Conservation Physiology
Conservation Physiology Environmental Science-Management, Monitoring, Policy and Law
CiteScore
5.10
自引率
3.70%
发文量
71
审稿时长
11 weeks
期刊介绍: Conservation Physiology is an online only, fully open access journal published on behalf of the Society for Experimental Biology. Biodiversity across the globe faces a growing number of threats associated with human activities. Conservation Physiology will publish research on all taxa (microbes, plants and animals) focused on understanding and predicting how organisms, populations, ecosystems and natural resources respond to environmental change and stressors. Physiology is considered in the broadest possible terms to include functional and mechanistic responses at all scales. We also welcome research towards developing and refining strategies to rebuild populations, restore ecosystems, inform conservation policy, and manage living resources. We define conservation physiology broadly and encourage potential authors to contact the editorial team if they have any questions regarding the remit of the journal.
期刊最新文献
The plasma proteome reveals markers of recent and repeated stress in free-ranging seals. Repeatability of swimming activity of the Patagonian grouper Acanthistius patachonicus based on accelerometry. Captivity conditions matter for the gut microbiota of an endangered obligate hibernator. Multiple stressors disrupt sex hormones and fitness outcomes: effects of hypoxia and turbidity on an African cichlid fish. Seasonal variation in thermal tolerance and hypoxia tolerance of a threatened minnow and a non-imperilled congener: a cautionary tale for surrogate species in conservation.
×
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