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Quantifying resilience of multiple ecosystem services and biodiversity in a temperate forest landscape

机译:在温带森林景观中量化多种生态系统服务和生物多样性的复原力

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摘要

Resilience is increasingly being considered as a new paradigm of forest management among scientists, practitioners, and policymakers. However, metrics of resilience to environmental change are lacking. Faced with novel disturbances, forests may be able to sustain existing ecosystem services and biodiversity by exhibiting resilience, or alternatively these attributes may undergo either a linear or nonlinear decline. Here we provide a novel quantitative approach for assessing forest resilience that focuses on three components of resilience, namely resistance, recovery, and net change, using a spatially explicit model of forest dynamics. Under the pulse set scenarios, we explored the resilience of nine ecosystem services and four biodiversity measures following a one‐off disturbance applied to an increasing percentage of forest area. Under the pulse + press set scenarios, the six disturbance intensities explored during the pulse set were followed by a continuous disturbance. We detected thresholds in net change under pulse + press scenarios for the majority of the ecosystem services and biodiversity measures, which started to decline sharply when disturbance affected >40% of the landscape. Thresholds in net change were not observed under the pulse scenarios, with the exception of timber volume and ground flora species richness. Thresholds were most pronounced for aboveground biomass, timber volume with respect to the ecosystem services, and ectomycorrhizal fungi and ground flora species richness with respect to the biodiversity measures. Synthesis and applications. The approach presented here illustrates how the multidimensionality of stability research in ecology can be addressed and how forest resilience can be estimated in practice. Managers should adopt specific management actions to support each of the three components of resilience separately, as these may respond differently to disturbance. In addition, management interventions aiming to deliver resilience should incorporate an assessment of both pulse and press disturbances to ensure detection of threshold responses to disturbance, so that appropriate management interventions can be identified.
机译:在科学家,从业者和政策制定者中,抵御力越来越被视为森林管理的新范例。但是,缺乏对环境变化的适应力指标。面对新的干扰,森林可能会通过展现弹性来维持现有的生态系统服务和生物多样性,或者这些属性可能会经历线性或非线性下降。在这里,我们提供了一种新颖的定量方法来评估森林的复原力,它使用森林动态空间明确模型,着重于复原力的三个组成部分,即抵抗力,恢复力和净变化。在脉冲集情景下,在对森林面积百分比不断增加的一次性干扰之后,我们探索了9种生态系统服务和4种生物多样性措施的复原力。在脉冲加压力设定的情况下,在脉冲设定期间探索的六个干扰强度随后是连续的干扰。对于大多数生态系统服务和生物多样性措施,我们在脉冲加压力情景下检测到净变化的阈值,当干扰影响大于40%的景观时,阈值开始急剧下降。在脉冲情景下,未观察到净变化的阈值,但木材量和地面植物区系物种丰富度除外。对于地上生物量,就生态系统服务而言的木材量以及就生物多样性措施而言,外生菌根真菌和地面植物物种丰富度的阈值最为明显。综合与应用。本文介绍的方法说明了如何解决生态学稳定性研究的多维问题,以及如何在实践中评估森林的适应力。管理人员应采取特定的管理措施来分别支持弹性的三个组成部分,因为这三个组成部分可能会对干扰做出不同的响应。此外,旨在提供弹性的管理干预措施应包括对脉冲和压力干扰的评估,以确保检测到对干扰的阈值响应,以便可以确定适当的管理干预措施。

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