实验性热浪促进了入侵,并改变了热带宿主-寄生虫社区中的物种相互作用和组成
1Department of Biology, University of Oxford, Oxford, UK.
Global change biology
|September 21, 2023
概括
气候变化对社区的影响不同:热浪与不断变暖不同,促进了热带雨林昆虫社区的入侵,改变了物种相互作用和丰富性. 这凸显了极端温度如何改变气候变化影响.
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
- 社区生态学 社区生态学
背景情况:
- 全球气温上升和热浪频率的增加推动了物种范围的扩大.
- 由气候变化促进的入侵造成的新物种相互作用可以重组居民社区.
- 气候变化和气候入侵对多种食物群体的互动影响仍未得到充分研究,尤其是在不同的气候驱动因素方面.
研究的目的:
- 研究气候变化 (热浪与持续变暖) 和物种入侵对宿主寄生虫群体的相互作用影响.
- 为了比较极端温度事件与逐渐变暖对社区组成和动态的影响.
- 了解入侵物种如何改变气候变化的影响在双网络中.
主要方法:
- 在实验室条件下重建了宿主-寄生虫群落 (四种Drosophila物种,两种寄生虫物种).
- 应用模拟的热浪或持续升温处理.
- 引入了一种新的,低海拔的宿主物种作为入侵治疗.
主要成果:
- 寄生虫物种对变暖和热浪治疗都很敏感.
- 果虫种类由于耐热性,寄生性,竞争性和促进性而表现出各种各样的人口反应.
- 热浪处理促进了高地社区的低海拔物种的建立.
- 侵袭与一种寄生虫物种有负相关性,对其宿主和竞争对手产生级联影响.
结论:
- 极端温度 (热浪) 和持续升温对社区组成产生不同的影响.
- 侵袭物种可以改变气候变化影响的规模和方向,在一个生物群体中.
- 了解这些复杂的相互作用对于预测对气候变化的生态反应至关重要.
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