Beckers Niklas, Hein Nils, Anneser Alessa, Vanselow Kim A, Löffler Jörg
Department of Geography, University of Bonn, Meckenheimer Allee 166, D-53115 Bonn, Germany.
School of Natural Sciences and Engineering, Ilia State University, 0162 Tbilisi, Georgia.
Insects. 2020 Jan 22;11(2):74. doi: 10.3390/insects11020074.
The Arctic is projected to be severely impacted by changes in temperature and precipitation. Species react to these changes by shifts in ranges, phenology, and body size. In ectotherms, the patterns of body size clines and their underlying mechanisms are often hard to untangle. Mountains provide a space-for-time substitute to study these shifts along multiple spatial gradients. As such, mobility and dispersal capacity might conceal reactions with elevation. We test this influence on body size clines by comparing two common arthropods of the alpine tundra. We find that high mobility in the lycosid spider blurs elevational effects. Partially low mobility at least during development makes the carabid beetle more susceptible to elevational effects. Specific life-history mechanisms, such as brood care in lycosid spiders and holometabolic development in carabid beetles, are the possible cause.
预计北极地区将受到温度和降水变化的严重影响。物种通过分布范围、物候和体型的变化对这些变化做出反应。在变温动物中，体型渐变群的模式及其潜在机制往往难以理清。山脉提供了一个时间换空间的替代方式，以便沿着多个空间梯度研究这些变化。因此，移动性和扩散能力可能会掩盖海拔高度带来的影响。我们通过比较两种常见的高山冻原节肢动物来测试这种对体型渐变群的影响。我们发现，狼蛛的高移动性模糊了海拔高度的影响。至少在发育期间部分较低的移动性使步甲更容易受到海拔高度的影响。特定的生活史机制，如狼蛛的育幼行为和步甲的全变态发育，可能是其原因。
