快速的植物特征进化可能会改变沿海湿地对海平面上升的抵抗力
M L Vahsen1, M J Blum2, J P Megonigal3
1Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA.
概括
生态系统预测必须包括快速演变. 遗传植物特征和进化对沿海湿地生物量,碳积累和海平面上升的适应性产生重大影响,改变了预测.
科学领域:
- 生态学
- 进化生物学
- 气候变化科学
背景情况:
- 全球变化模型往往忽视了快速进化对生态系统动态的影响.
- 沿海湿地是面临全球变化的重大威胁的重要生态系统.
- 预测生态系统轨迹需要了解所有主要驱动因素,包括进化因素.
研究的目的:
- 量化遗传变异和特征演变对沿海湿地生态系统预测的影响.
- 评估进化在解释生态系统状态变化的作用.
- 评估将进化过程纳入生态系统模型的影响.
主要方法:
- 通过从种子库中复活的 *Schoenoplectus americanus* 的基因型进行了常见花园研究.
- 分析了植物特征的遗传变异及其对生态系统属性的影响.
- 将特征进化整合到现有生态系统模型中,以比较预测.
主要成果:
- 遗传变异和进化显著解释了地下生物质分配和分布的变异性.
- 结合进化过程改变了碳积累的模型预测.
- 进化动态影响了土壤表面积累的预测,这是沼泽弹性的一个关键因素.
结论:
- 在预测生态系统应对全球变化的过程中,
- 遗传性特征的变化和演变显然影响了生态系统的关键功能和弹性.
- 准确的生态系统预测需要整合进化动态.
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