Comprehensive thermal performance curves for yellow dung fly life history traits and the temperature-size-rule
Comprehensive thermal performance curves for yellow dung fly life history traits and the temperature-size-rule
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DOI：
10.1016/j.jtherbio.2021.103069
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发表时间：
2021-08-11
影响因子：
2.7
通讯作者：
Walters, Richard J.
中科院分区：
文献类型：
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作者：
Blanckenhorn, Wolf U.;Berger, David;Walters, Richard J.
环境温度在很大程度上决定了所有生物的行为、生理和生活史。因此，以现在所谓的热性能曲线（TPC）的形式对生物体热生态位进行技术评估在生物研究中具有悠久的传统。然而，一些性状并不显示理想化的，直观的圆顶形TPC，并且在实践中评估通常不覆盖生物体的整个现实或自然温度范围。我们在这里说明这一点，提出全面的性别特异性TPC的主要（ju-venile）的生活史特征的黄粪蝇（Scathophaga stercoraria;双翅目：Scathophagidae）。这涉及到重要的生物地理学规则的估计，例如温度-尺寸规则（TSR），即变温生物体中的常见现象，即身体尺寸随着温度的升高而减小。S. Stercoraria显示了一个不典型的渐近TPC的连续的身体大小的增加，随着温度的降低，没有一个高峰（最佳），因此在整个热范围内的TSR（不像其他几种昆虫在这里）。卵到成虫的死亡率（我们最好的适应性估计）也没有显示中间最大值。两者都可能与这种苍蝇在12摄氏度以下进入蛹冬滞育有关。发育时间与温度呈负指数关系，发育速率和生长速率则为典型的TPC形式。迄今为止，在很大程度上未开发的近亲S。猪笼草与更北极的分布表现出非常相似的反应，表现出两个生态相似，共存的粪蝇物种之间的大重叠，从而意味着有限的效用，甚至完整的TPC预测物种分布和共存。
Ambient temperature strongly determines the behaviour, physiology, and life history of all organisms. The technical assessment of organismal thermal niches in form of now so-called thermal performance curves (TPC) thus has a long tradition in biological research. Nevertheless, several traits do not display the idealized, intuitive dome-shaped TPC, and in practice assessments often do not cover the entire realistic or natural temperature range of an organism. We here illustrate this by presenting comprehensive sex-specific TPCs for the major (ju-venile) life history traits of yellow dung flies (Scathophaga stercoraria; Diptera: Scathophagidae). This concerns estimation of prominent biogeographic rules, such as the temperature-size-rule (TSR), the common phenomenon in ectothermic organisms that body size decreases as temperature increases. S. stercoraria shows an untypical asymptotic TPC of continuous body size increase with decreasing temperature without a peak (optimum), thus following the TSR throughout their entire thermal range (unlike several other insects presented here). Egg-to -adult mortality (our best fitness estimator) also shows no intermediate maximum. Both may relate to this fly entering pupal winter diapause below 12 degrees C. While development time presents a negative exponential rela-tionship with temperature, development rate and growth rate typify the classic TPC form for this fly. The hitherto largely unexplored close relative S. suilla with an even more arctic distribution showed very similar responses, demonstrating large overlap among two ecologically similar, coexisting dung fly species, thus implying limited utility of even complete TPCs for predicting species distribution and coexistence.