Resource level modifies heatwave responses in the freshwater snail Lymnaea stagnalis

IF 2.8 2区 生物学 Q2 ECOLOGY Freshwater Biology Pub Date : 2024-03-16 DOI:10.1111/fwb.14239
Otto Seppälä, Georgios Katsianis, Veronika Stabauer, Katri Seppälä, Tiina Salo
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资源水平改变淡水蜗牛 Lymnaea stagnalis 的热浪反应
预测气候变化介导的环境对生物的影响十分困难,因为这些影响的方向和强度可能取决于多种生态因素,而这些因素的性质各不相同。这是因为环境因素的影响往往是相互影响的。改变生物体热性能的一个潜在重要因素是其资源水平。我们通过实验研究了淡水蜗牛(Lymnaea stagnalis)对热浪的表型反应对资源/食物供应的依赖性。我们将蜗牛饲养在不同的食物水平下(无限量、减少[预期消耗量的 50%]、无食物),并将它们暴露在热浪温度(27°C)或良性温度(17°C)下一周,然后再暴露在热浪后一周(17°C)。为了评估蜗牛的表现,我们对其新陈代谢活动(呼吸速率)、生长速率、繁殖力和免疫活动进行了量化。所有考察的性状都对温度做出了反应,与体能相关的性状(生长率、繁殖力)的变化取决于蜗牛的资源水平。在热浪阶段,在资源无限的情况下,温度升高带来的益处(生长率和繁殖力提高)要高于资源有限的情况。此外,在热浪过后的阶段,资源有限的蜗牛先前受热挑战的表现下降得最厉害。即使在食物供应充足的情况下,高温处理也会对蜗牛的免疫活动产生负面影响,但热浪过后,免疫特征又会恢复。有趣的是,高温对蜗牛表型的影响主要是直接的,而不是由代谢活动的增加所驱动的。我们的研究结果表明,滞育蜗牛的热浪反应对其资源水平很敏感。这种条件依赖性可能具有重要的生态和进化意义,具体表现为(1)使低质量栖息地的自然种群最容易受到热浪的影响;以及(2)通过改变热性能表型变异的表达方式,改变气候变化介导的进化。通过展示热浪反应的条件依赖性,我们的研究强调了研究气候变化介导的环境变化与自然界中不同的生态因素的相互作用的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Freshwater Biology
Freshwater Biology 生物-海洋与淡水生物学
CiteScore
5.90
自引率
3.70%
发文量
162
审稿时长
2 months
期刊介绍: Freshwater Biology publishes papers on all aspects of the ecology of inland waters, including rivers and lakes, ground waters, flood plains and other freshwater wetlands. We include studies of micro-organisms, algae, macrophytes, invertebrates, fish and other vertebrates, as well as those concerning whole systems and related physical and chemical aspects of the environment, provided that they have clear biological relevance. Studies may focus at any level in the ecological hierarchy from physiological ecology and animal behaviour, through population dynamics and evolutionary genetics, to community interactions, biogeography and ecosystem functioning. They may also be at any scale: from microhabitat to landscape, and continental to global. Preference is given to research, whether meta-analytical, experimental, theoretical or descriptive, highlighting causal (ecological) mechanisms from which clearly stated hypotheses are derived. Manuscripts with an experimental or conceptual flavour are particularly welcome, as are those or which integrate laboratory and field work, and studies from less well researched areas of the world. Priority is given to submissions that are likely to interest a wide range of readers. We encourage submission of papers well grounded in ecological theory that deal with issues related to the conservation and management of inland waters. Papers interpreting fundamental research in a way that makes clear its applied, strategic or socio-economic relevance are also welcome. Review articles (FRESHWATER BIOLOGY REVIEWS) and discussion papers (OPINION) are also invited: these enable authors to publish high-quality material outside the constraints of standard research papers.
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