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研究报道干旱对全球生态系统的影响

时间:2020-02-17 15:47 来源:www.86bts.com 作者:传奇私服

本期文章:《科学》:Volume 367 Issue 6479

西班牙阿利坎特大学Miguel Berdugo等研究人员报道干旱全球生态系统影响,并呼吁及时阻止干旱化发生。该项研究成果发表在2020年2月14日出版的《科学》上。

研究人员调查了全球干旱地区20种结构和功能生态系统属性如何响应干旱。 干旱化导致多种生态系统属性的系统性变化和突然改变。这些变化按三个阶段顺序发生,其特征是植物生产力、土壤肥力、植物覆盖率和丰富度突然下降,干旱度分别为0.54、0.7和0.8。到2100年,超过20%的陆地面积将超过某些阈值,这要求人们立即采取行动以最大程度地减少干旱化对生活在干旱地区的20多亿人口的基本生态系统服务的负面影响

 

据了解,由于气候变化,干旱在全球范围内不断增加,它影响着干旱地区生态系统的结构和功能。干旱是否会导致生态系统的逐渐变化(相对于突然变化)和系统性变化(相对于特定变化)尚不清楚。

 

附:英文原文

Title: Global ecosystem thresholds driven by aridity

Author: Miguel Berdugo, Manuel Delgado-Baquerizo, Santiago Soliveres, Rocío Hernández-Clemente, Yanchuang Zhao, Juan J. Gaitán, Nicolas Gross, Hugo Saiz, Vincent Maire, Anika Lehman, Matthias C. Rillig, Ricard V. Solé, Fernando T. Maestre

Issue&Volume: 2020/02/14

Abstract: Aridity, which is increasing worldwide because of climate change, affects the structure and functioning of dryland ecosystems. Whether aridification leads to gradual (versus abrupt) and systemic (versus specific) ecosystem changes is largely unknown. We investigated how 20 structural and functional ecosystem attributes respond to aridity in global drylands. Aridification led to systemic and abrupt changes in multiple ecosystem attributes. These changes occurred sequentially in three phases characterized by abrupt decays in plant productivity, soil fertility, and plant cover and richness at aridity values of 0.54, 0.7, and 0.8, respectively. More than 20% of the terrestrial surface will cross one or several of these thresholds by 2100, which calls for immediate actions to minimize the negative impacts of aridification on essential ecosystem services for the more than 2 billion people living in drylands.

DOI: 10.1126/science.aay5958

Source: https://science.sciencemag.org/content/367/6479/787

期刊信息

Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.037

官方网址:https://www.sciencemag.org/

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