Section for Ecoinformatics and Biodiversity, Department of Biology, Aarhus University, 8000 Aarhus C, Denmark.
Plant Ecology, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440 Bayreuth, Germany.
Ecol Lett. 2020 May;23(5):800-810. doi: 10.1111/ele.13481. Epub 2020 Feb 21.
It has been suggested that biogeographic historical legacies in plant diversity may influence ecosystem functioning. This is expected because of known diversity effects on ecosystem functions, and impacts of historical events such as past climatic changes on plant diversity. However, empirical evidence for a link between biogeographic history and present-day ecosystem functioning is still limited. Here, we explored the relationships between Late-Quaternary climate instability, species-pool size, local species and functional diversity, and the net primary productivity (NPP) of Northern Hemisphere forests using structural equation modelling. Our study confirms that past climate instability has negative effects on plant functional diversity and through that on NPP, after controlling for present-day climate, soil conditions, stand biomass and age. We conclude that global models of terrestrial plant productivity need to consider the biogeographical context to improve predictions of plant productivity and feedbacks with the climate system.
有人认为，植物多样性的生物地理历史遗产可能会影响生态系统功能。这是因为已知多样性会对生态系统功能产生影响，而且过去的气候变化等历史事件也会对植物多样性产生影响。然而，生物地理历史与当今生态系统功能之间联系的实证证据仍然有限。在这里，我们使用结构方程模型探讨了晚第四纪气候不稳定性、物种库大小、本地物种和功能多样性与北半球森林的净初级生产力（NPP）之间的关系。我们的研究证实，在控制当今气候、土壤条件、林分生物量和年龄后，过去气候的不稳定性对植物功能多样性产生负面影响，并通过这种方式对 NPP 产生负面影响。我们的结论是，需要考虑生物地理背景来改进陆地植物生产力的全球模型，以提高对植物生产力的预测和与气候系统的反馈。
