多种竞争者之间的生态进化动态减少了浮游植物的共存,但对社区生产力的影响有限
Charlotte Louise Briddon1, Aurora Menéndez García1,2, Giulia Ghedini1,3
1GIMM - Gulbenkian Institute, Lisbon, Portugal.
Proceedings. Biological sciences
|July 8, 2025
概括
在社区中共同进化的物种减少了它们的共存,但没有影响整体生物量. 进化加强了竞争差异,不均地影响了像氧气流这样的社区功能.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 海洋生物学 海洋生物学
背景情况:
- 物种相互作用推动了快速的进化,但这种进化的社区层面后果仍然不太清楚.
- 利基理论预测资源分割,增强共存和生产力,但经验证据表明,竞争能力的演变也是可能的.
研究的目的:
- 研究由社区内部竞争驱动的物种进化如何影响物种共存和生产力等社区属性.
- 为了确定进化的竞争能力是否会改变社区的功能,而不是与孤立进化的物种相比.
主要方法:
- 三种海洋浮游植物物种被单独培养 (单一培养) 或一起培养 (多种植) 长达4.5个月.
- 社区根据他们之前的竞争历史 (单种与多种) 进行了隔离组装.
- 随着时间的推移,监测了社区的组成和生产力 (生物量,氧气流).
主要成果:
- 物种的主导地位保持不变,但在物种共同进化 (多种植孤立) 的社区中,共存减少了.
- 在单一种植和多种植孤立群体中,总生物量增长率和承载能力是相似的.
- 在指数增长阶段,多种植孤立的社区表现出更大的氧气流.
结论:
- 社区内部的进化可以加剧物种之间的竞争差异,从而对生态系统功能产生不同的影响.
- 社区生物质可能对进化变化具有弹性,但其他生产力指标和稳定性方面需要仔细考虑.
- 从社区生物质单独推断进化后果可能是不够的;更广泛地看待生态系统的运作是必要的.
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