Elevated temperatures translate into reduced dispersal abilities in a natural population of an aquatic insect.
Elevated temperatures translate into reduced dispersal abilities in a natural population of an aquatic insect.
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温度升高会导致水生昆虫自然种群的扩散能力降低。
DOI：
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发表时间：
2019
影响因子：
4.8
通讯作者：
P. Haase
中科院分区：
文献类型：
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作者：
Jonas Jourdan;V. Baranov;R. Wagner;M. Plath;P. Haase
1.全球气温上升迫使许多物种改变其分布范围。然而，这种范围转移是否发生(以及发生的速度有多快)取决于物种的扩散能力。在大多数生态学研究中，与扩散相关的特征(如昆虫的翅膀大小或翅膀负载)被视为固定的、物种特有的特征，忽视了表型可塑性在昆虫发育中的重要作用。2.我们验证了散布相关性状本身随环境条件(温度制度、放电模式和个体发育期间的生物相互作用)而变化的假设。3.对德国中部地区鹤类自然种群Tipula Maxima进行了8年的采集。利用线性混合效应模型，我们分析了前3个月、6个月和12个月的环境条件对表型性状、物候特征和种群密度的影响。4.我们发现，前一年年平均气温每升高1°C，翅膀长度就会适度增加(5.6%)。同时，雌性和雄性的体重每1°C增加了17.8%和26.9%，这可能是由于栖息地生产力的增加，导致雌性和雄性的翅膀负荷增加了16.4%和19.3%。我们进一步发现，随着温度的升高，羽化期更短、更同步(即扩散的时间框架更窄)。5.综上所述，我们的结果表明，温度升高对极大毛虫的扩散能力产生了负面影响，并讨论了相似的格局可能如何影响其他水生昆虫，特别是分布范围较窄的狭角类群的种群持续存在。我们的研究呼吁将温度诱导的分散相关性状的表型可塑性的信息整合到预测气候变化范围变化的模型中。此外，本文报告的模式可能会影响气候变化条件下水生昆虫的集合种群动态，并可能导致昆虫生物量和多样性的持续下降。这篇文章受版权保护。版权所有。
1.Rising global temperatures force many species to shift their distribution ranges. However, whether or not (and how fast) such range shifts occur depends on species' dispersal capacities. In most ecological studies, dispersal-related traits (such as the wing size or wing loading in insects) are treated as fixed, species-specific characteristics, ignoring the important role of phenotypic plasticity during insect development. 2.We tested the hypothesis that dispersal-related traits themselves vary in dependence of ambient environmental conditions (temperature regimes, discharge patterns and biotic interactions during individual development). 3.We collected data over 8 years from a natural population of the crane fly Tipula maxima in central Germany. Using linear mixed-effect models, we analysed how phenotypic traits, phenological characteristics and population densities are affected by environmental conditions during the preceding 3, 6 and 12 months. 4.We found a moderate (5.6%) increase in wing length per 1°C increase of mean annual temperatures during the previous year. At the same time, body weight increased by as much as 17.8% in females and 26.9% in males per 1°C, likely driven by increased habitat productivity, which resulted in a 16.4% (female) and 19.3% (male) increased wing loading. We further found a shorter, more synchronized emergence period (i.e., a narrower time frame for dispersal) with increasing temperatures. 5.Altogether, our results suggest that dispersal abilities of T. maxima were negatively affected by elevated temperatures, and we discuss how similar patterns might affect the persistence of populations of other aquatic insects, especially stenoecious taxa with narrow distribution ranges. Our study calls for integration of information on temperature-induced phenotypic plasticity of dispersal-related traits into models forecasting range shifts in the face of climate change. Furthermore, the patterns reported here are likely to affect metapopulation dynamics of aquatic insects under climate change conditions and may contribute to the ongoing decline of insect biomass and diversity. This article is protected by copyright. All rights reserved.
影响因子：
8.8
作者：
Horne, Curtis R.;Hirst, Andrew. G.;Atkinson, David
通讯作者：
Atkinson, David