Mixed Forest plantations for climate Change mitigation and adaptation

减缓和适应气候变化的混合人工林

• 批准号: 451394862
• 负责人: Professor Dr. Jürgen Bauhus
• 金额: --
• 依托单位: São Paulo Research Foundation (FAPESP)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/451394862?language=en
• 关键词: Mixed; Forest; plantations; climate; Change

Forest landscape restoration and afforestation have recently received much international attention as a crucial opportunity for mitigating climate change (CC). Therefore, it features prominently in many political initiatives such as the EU Green Deal and the Bonn Challenge. Yet, the ongoing increase in biotic and abiotic stress driven by CC puts forests under threat. In the face of CC, adaptation and mitigation by forests are ultimately linked, because the ability of forests to sequester carbon (C) in the long run depends on the ability of trees to cope with multiple stresses. A growing body of evidence suggests that mixed forest plantations, i.e., plantations where several tree species are mixed, are more efficient in sequestrating C, while better coping with CC-related stress. Mixed plantations thus represent an opportunity for an important nature-based solution for CC mitigation and adaptation. However, monocultures still dominate the world’s forest plantations. The reasons for the apparent resistance to mixed plantations among landowners and stakeholders need to be identified and addressed in future forest policies to promote the large-scale expansion of more CC-resilient mixed forest plantations. One of the possible factors that may have prevented the expansion of mixed plantations at large scales is insufficient scientific evidence for practitioners and policy-makers. Using a global network of forest biodiversity experiments (TreeDivNet), we will provide a mechanistic understanding of how tree diversity, species identities and management (thinning and fertilization) influence both the potential of mixed forest plantations to mitigate (C sequestration) and adapt (drought and herbivory resilience) to CC, in a win-win approach. In addition, we will translate this knowledge into guidelines that can be widely adopted by practitioners and policy-makers. The TreeDivNet network comprises 26 experiments spread across the globe, with ca. 1.2M planted trees. All these experiments were based on a common, statistically sound design that allows detection of causal relationships between tree diversity, management and forest ecosystem functioning (incl. C sequestration). The functional and mechanistic focus of MixForChange and the contrasting environmental contexts embedded in the network will allow us to scale-up our findings beyond case studies to provide evidence-based guidelines for mixed plantation management in a broad range of environments. Moreover, MixForChange will analyse in a common framework, and at unprecedented scale, synergies and trade-offs between the CC mitigation and adaptation potential of mixed plantations and the fulfilment of stakeholders’ objectives. The societal impact of MixForChange will be ensured by a strong focus on knowledge transfer and capacity-building at all levels of management and governance. MixForChange will make an important contribution to promoting mixed forest plantations as nature-based solutions to fight CC.

森林景观恢复和植树造林作为减缓气候变化的一个重要机会，最近受到国际社会的广泛关注。因此，它在欧盟绿色交易和波恩挑战等许多政治倡议中占有突出地位。然而，气候变化造成的生物和非生物压力持续增加，使森林受到威胁。面对气候变化，森林的适应和减缓最终是相互联系的，因为森林长期固碳的能力取决于树木科普多重压力的能力。越来越多的证据表明，混交林种植，即，几个树种混合的种植园，更有效地固碳，同时更好地应对CC相关的压力。因此，混合种植是一个机会，一个重要的基于自然的解决方案，气候变化的缓解和适应。然而，单一栽培仍然在世界森林种植中占主导地位。需要在未来的森林政策中查明和解决土地所有者和利益相关者对混交林明显抵制的原因，以促进对气候变化更具抵抗力的混交林种植园的大规模扩张。阻碍大规模混合种植的一个可能因素是从业者和决策者缺乏足够的科学证据。利用全球森林生物多样性实验网络（TreeDivNet），我们将从机制上了解树木多样性、物种身份和管理（间伐和施肥）如何影响混交林种植园缓解（碳封存）和适应（碳封存）的潜力干旱和草食动物恢复力）以双赢的方式应对气候变化。此外，我们将把这些知识转化为可被从业者和政策制定者广泛采用的指导方针。TreeDivNet网络由分布在地球仪的26个实验组成。1.2万棵树所有这些实验都是基于一个共同的，统计上合理的设计，允许检测树木多样性，管理和森林生态系统功能（包括）之间的因果关系。C螯合）。MixForChange的功能和机制重点以及网络中嵌入的对比环境背景将使我们能够扩大我们的研究结果，超越案例研究，为广泛环境中的混合种植园管理提供基于证据的指导方针。此外，MixForChange将在一个共同的框架内，以前所未有的规模，分析混合种植的气候变化缓解和适应潜力与实现利益攸关方目标之间的协同作用和权衡。将通过大力注重各级管理和治理的知识转让和能力建设，确保MixForChange产生社会影响。MixForChange将为促进混合林种植作为防治气候变化的基于自然的解决方案作出重要贡献。