Empirical assessments of small-scale ecosystem service flows in rural mosaic landscapes in the Ethiopian highlands

IF 6.1 2区 环境科学与生态学 Q1 ECOLOGY
Tegegne Molla Sitotaw , Louise Willemen , Derege Tsegaye Meshesha , Andrew Nelson
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引用次数: 0

Abstract

Human activities have rapidly altered natural ecosystems worldwide, resulting in fragmented ecosystems that are either culturally or formally protected. These ecosystem patches can be critical for ecosystem services (ES) that support human well-being. In the Ethiopian highlands, the remaining church forests and wetlands have a unique conservation status and are part of the global priority areas for biodiversity conservation. ES flows from these ecosystems to surrounding benefiting areas lack local-scale field evidence data and are not well-understood. Here, we empirically quantify the distance-dependent flows for four ES: grass biomass, microclimate regulation, crop pollination, and soil erosion retention since they exhibit considerable variation in spatial scales and processes of ES flows. The effect of spatial distance on each ES benefit flow was analysed using spatially explicit empirical models. The key findings are as follows: (1) The benefit of ES varies significantly with distance to the source ecosystems. (2) ES supply is determined by the extent (fragmentation) and condition of ecosystems, together with ecosystem type. (3) The quantity and number of ES provided decreases with distance from the source, and beneficiaries up to 3 km of the source only receive one type of ES (grass biomass). Approximately 80 % of the benefiting areas are within a radius of 200 m from forests and wetlands. Bundles of multiple ES types are received at the frontiers of service-providing ecosystems, where number of benefits are compared at particular locations from the source point. The investigated ecosystems (440 km2) provided benefits to 8,770 km2 for the four types of ES. Our findings imply that non-linear effects of key ecosystem variables need to be considered when mapping the distance-dependent ES flows. This study helps to understand the spatial connectivity between ecosystems and beneficiaries in the human-nature interdependency, which is useful for developing different strategies for ES conservation.

埃塞俄比亚高原农村马赛克景观中小规模生态系统服务流的经验评估
人类活动迅速改变了世界各地的自然生态系统,导致生态系统支离破碎,这些生态系统要么受到文化保护,要么受到正式保护。这些生态系统斑块对于支持人类福祉的生态系统服务 (ES) 至关重要。在埃塞俄比亚高原,剩余的教堂森林和湿地具有独特的保护地位,是全球生物多样性保护优先区域的一部分。从这些生态系统流向周边受益地区的生态系统服务(ES)缺乏当地尺度的实地证据数据,也没有得到很好的理解。在此,我们对草地生物量、小气候调节、作物授粉和土壤侵蚀保持这四种生态系统的距离依赖性流动进行了实证量化,因为它们在空间尺度和生态系统流动过程中表现出相当大的差异。利用空间显式经验模型分析了空间距离对每种环境服务效益流的影响。主要结论如下(1) 生态系统惠益随距离源生态系统的远近而显著不同。(2) 生态系统供应由生态系统的范围(破碎化)和状况以及生态系统类型决定。(3) 提供的生态系统服务的数量和种类随距离源的远近而减少,距离源 3 公里以内的受益者只能获得一种生态系统服务(草生物量)。约 80% 的受益区距离森林和湿地半径在 200 米以内。在提供服务的生态系统的前沿可获得多种 ES 类型的捆绑,在此可比较从源点出发的特定地点的受益数量。所调查的生态系统(440 平方公里)为 8,770 平方公里提供了四种 ES 的效益。我们的研究结果表明,在绘制与距离相关的 ES 流量图时,需要考虑关键生态系统变量的非线性效应。这项研究有助于了解人与自然相互依存关系中生态系统与受益者之间的空间连接性,这对制定不同的生态系统服务保护策略非常有用。
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来源期刊
Ecosystem Services
Ecosystem Services ECOLOGYENVIRONMENTAL SCIENCES&-ENVIRONMENTAL SCIENCES
CiteScore
14.90
自引率
7.90%
发文量
109
期刊介绍: Ecosystem Services is an international, interdisciplinary journal that is associated with the Ecosystem Services Partnership (ESP). The journal is dedicated to exploring the science, policy, and practice related to ecosystem services, which are the various ways in which ecosystems contribute to human well-being, both directly and indirectly. Ecosystem Services contributes to the broader goal of ensuring that the benefits of ecosystems are recognized, valued, and sustainably managed for the well-being of current and future generations. The journal serves as a platform for scholars, practitioners, policymakers, and other stakeholders to share their findings and insights, fostering collaboration and innovation in the field of ecosystem services.
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