Terrestrial subsidies and light affect an aquatic micro-ecosystem in unexpected ways

IF 2.8 2区生物学 Q2 ECOLOGY

Freshwater Biology Pub Date : 2024-04-13 DOI:10.1111/fwb.14252

Pierre Rogy, Diane S. Srivastava

引用次数: 0

Abstract

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陆地补贴和光照以意想不到的方式影响水生微型生态系统

资源补贴对受援生态系统的影响取决于多种因素。首先，增加限制性营养物质的供应往往会增加受体食物网不同部分的生物量积累。其次，就水生微生物而言，生物量的积累可能还取决于通过光照输入的能量，以及异养细菌和自养藻类之间的相互作用。第三，宏观消费者以微生物为食，并通过排泄和排出回收养分，从而对养分循环产生深远影响。为了研究水生系统中养分循环的环境依赖性，我们在中置培养箱中进行了一项实验，观察了溶解的养分、微生物和世界性蚊子库蚊（双翅目：Culicidae）幼虫对两种不同碳（C）:养分的陆地补助以及两种光照强度的反应。我们发现，在考虑了处理效应之后，细菌和藻类之间的相互作用总体上仍然不重要，而光照确实介导了营养补贴对微生物的一些影响。我们还发现，蚊子幼虫的存在与某些处理中氮（N）浓度的改变有关，最终有利于藻类。最后，我们发现低碳：营养补贴通常会提高蚊子幼虫的发育速度，而增加光照则会提高蚊子的存活率。总体而言，这些模式的原因可能是我们的系统中存在强烈的氮限制，导致两类微生物对养分供应的变化做出类似的反应，而没有直接的共变关系，也可能是蚊子幼虫对氮的循环利用在维持暴露处理中的藻类密度方面发挥了关键作用。我们研究中的环境依赖性可能反映了磷以外的元素或分子制约因素。因此，我们的实验需要进一步综合生态理论。

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来源期刊

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.