Temperature-dependent interactions explain unexpected responses to environmental warming in communities of competitors
Temperature-dependent interactions explain unexpected responses to environmental warming in communities of competitors
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DOI：
10.1111/j.0021-8790.2004.00830.x
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发表时间：
2004-05-01
影响因子：
4.8
通讯作者：
Morin, PJ
中科院分区：
文献类型：
--
作者：
Jiang, L;Morin, PJ
1. 关于物种如何应对气候变暖的预测通常基于生态生理模型或生态位模型。对这种做法的一个批评是它忽略了种间相互作用。2．我们研究了资源竞争如何影响两种纤毛虫物种（Colpidium striatum Stein 和 Paramecium tetraurelia Sonneborn）对实验室微观世界变暖的反应。3。我们发现，在没有种间竞争的情况下，变暖对 Colpidium 丰度有负面影响，而对草履虫丰度的影响可以忽略不计。然而，当草履虫与草履虫竞争时，草履虫在低温和高温下均与草履虫共存，而在中温时则被竞争排除。4． Colpidium和草履虫之间相互作用的温度依赖性强度可以解释草履虫的意外反应，这与其在没有Colpidium的情况下对温度的响应不一致。5．我们的研究结果进一步支持了物种相互作用在理解物种如何应对环境变暖方面的重要作用，并表明物种相互作用与气候之间复杂的相互作用可能使得准确预测复杂群落中的物种将如何应对气候变暖变得极其困难。
1. Predictions about how species will respond to climate warming are based commonly on eco-physiological models or niche models. One critique of this practice is that it ignores interspecific interactions.2. We examined how resource competition affects the responses of two ciliate species, Colpidium striatum Stein and Paramecium tetraurelia Sonneborn, to warming in laboratory microcosms.3. We found that warming had a negative effect on Colpidium abundance and a negligible effect on Paramecium abundance in the absence of interspecific competition. When Colpidium and Paramecium competed, however, Paramecium coexisted with Colpidium at low and high temperatures, and was competitively excluded at intermediate temperatures.4. Temperature-dependent strength of the interaction between Colpidium and Paramecium may explain the unexpected responses of Paramecium, which were inconsistent with its response to temperature in the absence of Colpidium.5. Our results provide further support for the important role of species interactions in understanding how species respond to environmental warming, and suggest that the complex interplay between species interactions and climate may make it extremely difficult to predict accurately how species embedded in complex communities will respond to climate warming.