Changes in feeding selectivity of freshwater invertebrates across a natural thermal gradient.
Changes in feeding selectivity of freshwater invertebrates across a natural thermal gradient.
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DOI：
10.1093/cz/zoy011
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发表时间：
2018-04
期刊：
影响因子：
2.2
通讯作者：
Handling editor: David Bierbach
中科院分区：
文献类型：
--
作者：
Gordon TAC;Neto-Cerejeira J;Furey PC;O'Gorman EJ;Handling editor: David Bierbach
环境变暖对生物的生理限制，这可能会通过它们的摄食行为来缓解。理论预测，消费者应该增加他们的喂养选择性更有价值的能源在温暖的环境中，以抵消不成比例的增加代谢需求相对于摄食率。这也可能导致喂养策略的改变或转向更专业的饮食。采用自然升温实验，研究了温度对三种淡水无脊椎食草动物--黑蜗牛（Radix balthica）、拟金蝇幼虫（Simuquillary aureum）和小真蠓幼虫（Eukiquilliella minor）--摄食选择性的影响。Chesson的选择性指数被用来比较硅藻物种的比例丰度的肠道中的每一种无脊椎动物与相应的岩石生物膜样品从不同温度的流。在温暖的溪流中，蜗牛变得更具选择性，选择高姿态的石生硅藻而不是其他公会，并以较低多样性的硅藻物种为食。黑蝇幼虫似乎从主动收集器收集无柄高姿态硅藻切换到更被动的过滤器喂养的能动硅藻在温暖的溪流。没有变化的选择性，观察到的蠓幼虫，其饮食是代表资源的环境中的可用性。这些结果表明，在淡水流，这构成了无脊椎动物生物量的主要部分，主要的初级消费者，可以改变他们的摄食行为在温暖的沃茨在一系列不同的方式。这些模式可能会导致淡水食物网中能量流动的根本变化。
Environmental warming places physiological constraints on organisms, which may be mitigated by their feeding behavior. Theory predicts that consumers should increase their feeding selectivity for more energetically valuable resources in warmer environments to offset the disproportionate increase in metabolic demand relative to ingestion rate. This may also result in a change in feeding strategy or a shift towards a more specialist diet. This study used a natural warming experiment to investigate temperature effects on the feeding selectivity of three freshwater invertebrate grazers: the snail Radix balthica, the blackfly larva Simulium aureum, and the midgefly larva Eukiefferiella minor. Chesson’s Selectivity Index was used to compare the proportional abundance of diatom species in the guts of each invertebrate species with corresponding rock biofilms sampled from streams of different temperature. The snails became more selective in warmer streams, choosing high profile epilithic diatoms over other guilds and feeding on a lower diversity of diatom species. The blackfly larvae appeared to switch from active collector gathering of sessile high profile diatoms to more passive filter feeding of motile diatoms in warmer streams. No changes in selectivity were observed for the midgefly larvae, whose diet was representative of resource availability in the environment. These results suggest that key primary consumers in freshwater streams, which constitute a major portion of invertebrate biomass, can change their feeding behavior in warmer waters in a range of different ways. These patterns could potentially lead to fundamental changes in the flow of energy through freshwater food webs.
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影响因子：
3.7
作者：
Castillo G;Cruz LL;Tapia-López R;Olmedo-Vicente E;Carmona D;Anaya-Lang AL;Fornoni J;Andraca-Gómez G;Valverde PL;Núñez-Farfán J
通讯作者：
Núñez-Farfán J
影响因子：
56.9
作者：
Chen, I-Ching;Hill, Jane K.;Thomas, Chris D.
通讯作者：
Thomas, Chris D.
影响因子：
1.8
作者：
Furey, P. C.;Kupferberg, S. J.;Lind, A. J.
通讯作者：
Lind, A. J.
影响因子：
11.6
作者：
Binzer, Amrei;Guill, Christian;Brose, Ulrich
通讯作者：
Brose, Ulrich
影响因子：
4.8
作者：
CHESSON, J
通讯作者：
CHESSON, J