Phenotypic response to different predator strategies can be mediated by temperature.
Phenotypic response to different predator strategies can be mediated by temperature.
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DOI：
10.1002/ece3.10474
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发表时间：
2023-09
影响因子：
2.6
通讯作者：
中科院分区：
文献类型：
--
作者：
尾草履虫（Paramecium caudatum）对栉毛虫（Didinium nasutum）的存在表现出明显的温度依赖性形态反应（但对蛭态轮虫（Homalozoon vermiculare）则没有），在15°C时细胞形状向更细长的形态改变（但在25°C时没有）。这表明温度对猎物针对捕食者存在的形态反应有强烈影响，但这种反应可能取决于捕食者的捕食策略。
Temperature change affects biological systems in multifaceted ways, including the alteration of species interaction strengths, with implications for the stability of populations and communities. Temperature‐dependent changes to antipredatory responses are an emerging mechanism of destabilization and thus there is a need to understand how prey species respond to predation pressures in the face of changing temperatures. Here, using ciliate protozoans, we assess whether temperature can alter the strength of phenotypic antipredator responses in a prey species and whether this relationship depends on the predator's hunting behavior. We exposed populations of the ciliate Paramecium caudatum to either (i) a sit‐and‐wait generalist predator (Homalozoon vermiculare) or (ii) a specialized active swimmer predator (Didinium nasutum) across two different temperature regimes (15 and 25°C) to quantify the temperature dependence of antipredator responses over a 24‐h period. We utilized a novel high‐throughput automated robotic monitoring system to track changes in the behavior (swimming speed) and morphology (cell size) of P. caudatum at frequencies and resolutions previously unachievable by manual sampling. The change in swimming speed through the 24 h differed between the two temperatures but was not altered by the presence of the predators. In contrast, P. caudatum showed a substantial temperature‐dependent morphological response to the presence of D. nasutum (but not H. vermiculare), changing cell shape toward a more elongated morph at 15°C (but not at 25°C). Our findings suggest that temperature can have strong effects on prey morphological responses to predator presence, but that this response is potentially dependent on the predator's feeding strategy. This suggests that greater consideration of synergistic antipredator behavioral and physiological responses is required in species and communities subject to environmental changes. Paramecium caudatum shows a substantial temperature‐dependent morphological response to the presence of Didinium nasutum (but not Homalozoon vermiculare), changing cell shape toward a more elongated morph at 15°C (but not at 25°C). This suggests that temperature can have strong effects on prey morphological responses to predator presence, but that this response is potentially dependent on the predator's feeding strategy.
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影响因子：
2.6
作者：
Clements, Christopher F.;Warren, Philip H.;Collen, Ben;Blackburn, Tim;Worsfold, Nicholas;Petchey, Owen
通讯作者：
Petchey, Owen
影响因子：
8.8
作者：
通讯作者：
--
影响因子：
5.2
作者：
Chevin, Luis-Miguel;Collins, Sinead;Lefevre, Francois
通讯作者：
Lefevre, Francois
影响因子：
3.4
作者：
Hammill, E.;Kratina, P.;Anholt, B. R.
通讯作者：
Anholt, B. R.
影响因子：
2.7
作者：
KUSCH, J
通讯作者：
KUSCH, J