解开昆虫群体十年体型下降的驱动因素
Jamieson C Botsch1, Aayush N Zaveri1, Lucas A Nell1
1Department of Integrative Biology, University of Wisconsin-Madison, Madison, Wisconsin, USA.
Global change biology
|November 9, 2023
概括
在冰岛,气候变暖并没有显著缩小中年人体大小. 温度,人口规模和食物供应等多个因素相互作用,影响ectotherm体型趋势.
科学领域:
- 生态生态学 生态生态学
- 气候变化生物学 气候变化生物学
- 动物学 动物学
背景情况:
- 预计气候变暖将减少热体大小,但经验证据不一致.
- 身体大小受到温度,食物质量和人口密度的影响,而长期的环境变化也会影响到这些因素.
- 将温度的影响与其他因素分开,对于理解体型趋势至关重要.
研究的目的:
- 为了研究中Tanytarsus gracilentus的体型趋势.
- 识别和量化水温,人口数量和食物质量对中等体型的影响.
- 分析这些关系长期 (1977年至2015年) 在冰岛米瓦特湖.
主要方法:
- 对中等体型,水温,人口丰度和食品质量 (使用13C丰富) 的长期数据的分析.
- 应用状态空间模型来解释多个相互作用的预测因素.
- 环境因素与中等体型之间的关联的统计评估.
主要成果:
- 尽管Mývatn湖的水温上升,但中年成年人身体大小的减少只是不显著的.
- 体大小与水温和人口丰富性都有负面关联.
- 身体大小与13C丰富有积极的关联,这表明食物条件更好.
结论:
- 该研究强调,包括温度,人口密度和食物供应在内的多个因素相互作用,以确定ectotherm体型.
- 观察到的身体尺寸趋势可能是由于这些相互作用因素的抵消作用,掩盖了简单的温度驱动的预测.
- 全球变化对这些多重因素的影响可能会导致复杂的,非线性影响平均ectotherm身体大小.
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