Prey adaptation along a competition-defense tradeoff cryptically shifts trophic cascades from density- to trait-mediated
Prey adaptation along a competition-defense tradeoff cryptically shifts trophic cascades from density- to trait-mediated
复制标题
沿着竞争-防御权衡的猎物适应神秘地将营养级联从密度介导转变为性状介导
DOI:
10.1007/s00442-020-04610-2
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发表时间:
2020
期刊:
影响因子:
2.7
通讯作者:
Palkovacs, Eric P.
中科院分区:
文献类型:
--
作者:
Wood, Zachary T.;Fryxell, David C.;Moffett, Emma R.;Kinnison, Michael T.;Simon, Kevin S.;Palkovacs, Eric P.
Trophic cascades have become a dominant paradigm in ecology, yet considerable debate remains about the relative strength of density- (consumptive) and trait-mediated (non-consumptive) effects in trophic cascades. This debate may, in part, be resolved by considering prey experience, which shapes prey traits (through genetic and plastic change) and influences prey survival (and therefore density). Here, we investigate the cascading role of prey experience through the addition of mosquitofish (Gambusia affinis) from predator-experienced or predator-naïve sources to mesocosms containing piscivorous largemouth bass (Micropterus salmoides), zooplankton, and phytoplankton. These two sources were positioned along a competition-defense tradeoff. Results show that predator-naïve mosquitofish suffered higher depredation rates, which drove a density-mediated cascade, whereas predator-experienced mosquitofish exhibited higher survival but fed less, which drove a trait-mediated cascade. Both cascades were similar in strength, leading to indistinguishable top-down effects on lower trophic levels. Therefore, the accumulation of prey experience with predators can cryptically shift cascade mechanisms from density- to trait-mediated.
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影响因子:
5.2
作者:
B. H. Ousterhout;Savannah R. Graham;A. Hasik;M. Serrano;A. Siepielski
通讯作者:
A. Siepielski
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
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影响因子:
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通讯作者:
K. Gocke
DOI:
10.1098/rspb.2018.0384
发表时间:
2018
期刊:
Proceedings of the Royal Society B: Biological Sciences
影响因子:
--
作者:
Denon Start
通讯作者:
Denon Start
DOI:
10.1098/rspb.2012.0496
发表时间:
2012-08
期刊:
Proceedings of the Royal Society B: Biological Sciences
影响因子:
--
作者:
M. Walsh;J. Delong;T. C. Hanley;D. Post
通讯作者:
M. Walsh;J. Delong;T. C. Hanley;D. Post