在食物网模型中提高捕食者-猎物大小关系的生物现实性,改变了生态系统的动态
Kieran J Murphy1,2, Gretta T Pecl1, Jason D Everett3,4,5
1Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Australia.
Biology letters
|October 24, 2023
概括
捕食者与猎物的尺寸关系比传统模型所假设的要多. 将这种多样性纳入生态系统模型,如头足动物的生态系统模型,可以提高生态准确性和稳定性预测.
科学领域:
- 生态生态学 生态生态学
- 生态系统建模 生态系统建模
- 海洋生物学 海洋生物学
背景情况:
- 捕食者-猎物体型关系是生态系统结构和功能的基础.
- 传统的生态系统模型往往简化了这些关系,假设捕食者消耗相对较小的猎物.
- 这种简化忽略了在自然界观察到的各种养策略和生命史.
研究的目的:
- 研究将生物现实的捕食者-猎物大小关系纳入生态系统模型的影响.
- 评估各种食策略如何影响能量流动和生态系统动态,以头足动物为例.
- 挑战和完善现有的规模结构化生态系统模型.
主要方法:
- 根据不同的,经验上得出的捕食者-猎物大小关系,将足动物分为高活动和低活动群.
- 将这些基于尺寸的多样化养策略集成到一个以尺寸结构化的生态系统模型中.
- 分析了生态系统生物质,生产,稳定性和周转率的变化.
主要成果:
- 将更大的生物现实主义纳入掠食者-猎物大小关系,减少了整体生态系统生物量和生产.
- 随着更现实的养假设,观察到生物质稳定性和周转率的增加.
- 明显的捕食者-猎物大小关系显著改变了模拟的生态系统能量流.
结论:
- 生物现实的捕食者-猎物大小关系对于准确的生态系统建模至关重要.
- 这些发现对模拟包括鱼类和海洋哺乳动物在内的各种类型有广泛的影响.
- 采用各种养策略的增强食品网络模型提高了生态和预测准确性.
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