Ecosystem resilience towards climate change - the role of interacting buffer mechanisms in Mediterranean-type ecosystems

生态系统对气候变化的复原力——地中海型生态系统中相互作用的缓冲机制的作用

• 批准号: 263483514
• 负责人: Professorin Dr. Britta Tietjen
• 金额: --
• 依托单位: Arbeitsgruppe Theoretische Ökologie (Tietjen)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2014
• 资助国家: 德国
• 起止时间: 2013-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/263483514?language=en
• 关键词: Ecosystem; resilience; towards; climate; change

Ecosystems are known to exhibit buffer mechanisms that reduce the impact of disturbances on vegetation and that prevent the system from easily shifting from one state to another. Buffering mechanisms can occur on the level of the population (e.g. trait variability), on the level of the community (e.g. substitution of one species by another with the same function), or on the level of the landscape (e.g. refuge sites, self organization). Although the role of single buffer mechanisms has been studied in several ecosystems, a thorough analysis of interacting buffer mechanisms on various scales is missing. Therefore, we often do not know what stabilizes ecosystems under present conditions and how this could change in the future.The aim of this project is therefore to first evaluate buffer mechanisms on different levels of an ecosystem in the species-rich Mediterranean-type shrublands of the Eneabba sandplain in south-western Australia and then to develop a general theory of buffer mechanisms in Mediterranean-type ecosystems. The Eneabba sandplain is a global biodiversity hotspot and consists of a landscape of dunes and interdunes covered by dense and spatially heterogeneous shrub vegetation with regular fire events that drive recruitment. In this project, we want to particularly understand the interacting mechanisms that stabilize this and other ecosystems against harsh environmental conditions and how the importance of each mechanism will shift under climate change. For this, we will develop an ecohydrological model, which simulates the spatially heterogeneous coupled dynamics of water and vegetation. The model combines the advantages of two existing models (Eneabba vegetation: Esther et al. 2008, 2010, 2011; ecohydrology: Tietjen et al. 2009, 2010, Lohmann et al. 2012), and its development and application will be closely accompanied by extensive field measurements and experiments of cooperation partners on soil moisture, water fluxes and vegetation dynamics under present and possible future climate conditions. Model experiments on trait variability, species composition and landscape heterogeneity will then help to asses the drivers of resilience under present conditions, to disentangle impacts of single buffer mechanisms, and to assess the role of different buffer mechanisms under climate change and the future resilience of the ecosystem. This will not only improve our site-specific knowledge of ecosystem dynamics, but will also provide a novel base to understand buffer mechanisms and their interactions in general.

众所周知，生态系统具有缓冲机制，可以减少干扰对植被的影响，并防止系统容易地从一种状态转移到另一种状态。缓冲机制可以发生在种群层面(如性状变异性)、群落层面(如具有相同功能的另一个物种取代一个物种)或景观层面(如避难点、自组织)。虽然已经在几个生态系统中研究了单一缓冲机制的作用，但缺乏对不同尺度上相互作用的缓冲机制的彻底分析。因此，我们常常不知道在目前的条件下是什么稳定了生态系统，以及这种情况在未来会如何改变。因此，本项目的目的是首先评估澳大利亚西南部埃尼亚巴沙地物种丰富的地中海型灌丛生态系统不同层次上的缓冲机制，然后发展地中海型生态系统缓冲机制的一般理论。Eneabba沙地是一个全球生物多样性热点，由沙丘和沙丘之间的景观组成，覆盖着密集和空间异质的灌木植被，定期发生火灾事件，推动补充。在这个项目中，我们希望特别了解在恶劣环境条件下稳定这个生态系统和其他生态系统的相互作用机制，以及在气候变化下每个机制的重要性将如何变化。为此，我们将开发一个生态水文模型，模拟水和植被在空间上的非均质耦合动态。该模型结合了现有的两个模型的优点(Eneabba植被：Esther等人)。2008年、2010年、2011年；生态水文学：Tietjen等人。2009年、2010年，Lohmann等人。它的开发和应用将密切伴随着合作伙伴就当前和未来可能的气候条件下的土壤水分、水通量和植被动态进行的广泛的实地测量和实验。然后，关于性状变异性、物种组成和景观异质性的模型实验将有助于评估当前条件下弹性的驱动因素，区分单一缓冲机制的影响，并评估不同缓冲机制在气候变化和生态系统未来弹性中的作用。这不仅将提高我们对生态系统动力学的特定地点的知识，而且还将提供一个新的基础，以了解缓冲机制及其相互作用。

项目成果

The expansion of short rotation forestry: characterization of determinants with an agent‐based land use model

• DOI: 10.1111/gcbb.12400
• 发表时间: 2017-06
• 期刊: GCB Bioenergy
• 作者: Jule Schulze;E. Gawel;Henning Nolzen;Hanna Weise;K. Frank

The role of landscape heterogeneity in regulating plant functional diversity under different precipitation and grazing regimes in semi-arid savannas

• DOI: 10.1016/j.ecolmodel.2018.04.009
• 发表时间: 2018-07-10
• 期刊: ECOLOGICAL MODELLING
• 影响因子: 3.1
• 作者: Guo, Tong;Weise, Hanna;Tietjen, Britta
• 通讯作者: Tietjen, Britta

Climate change‐induced vegetation shifts lead to more ecological droughts despite projected rainfall increases in many global temperate drylands

• DOI: 10.1111/gcb.13598
• 发表时间: 2017-07
• 期刊: Global Change Biology
• 影响因子: 11.6
• 作者: B. Tietjen;D. Schlaepfer;J. Bradford;W. Lauenroth;S. Hall;M. Duniway;T. Hochstrasser;G. Jia;S. Munson;D. Pyke;S. Wilson

Exploring resilience with agent-based models: State of the art, knowledge gaps and recommendations for coping with multidimensionality

• DOI: 10.1016/j.ecocom.2018.06.008
• 发表时间: 2019-12-01
• 期刊: ECOLOGICAL COMPLEXITY
• 影响因子: 3.5
• 作者: Egli, Lukas;Weise, Hanna;Grimm, Volker
• 通讯作者: Grimm, Volker

Resilience trinity: safeguarding ecosystem services across three different time horizons and decision contexts

弹性三位一体：在三个不同的时间范围和决策背景下保护生态系统服务

• DOI: 10.1101/549873
• 期刊: bioRxiv
• 作者: Weise H;Auge H;Baessler C;Bärlund I;Bennett E.M;Berger U;Bohn F;Bonn A;Borchardt D;Brand F;Chatzinotas A;Corstanje R;De Laender F;Dietrich P;Dunker S;Durka W;Fazey I;Groeneveld J;Guilbaud CSE;Harms H;Harpole S;Harris J;Jeltsc
• 通讯作者: Jeltsc