Environmental heterogeneity compensates the potential homogenising effect of abandonment of grazing in a sub-Mediterranean mountain landscape

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-11-02 DOI:10.1080/17550874.2022.2039314

Alessandro Bricca, F. Tardella, A. Ferrara, Xia Xinfang, Fabio Tolu, A. Catorci

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引用次数: 2

Abstract

ABSTRACT Background Anthropogenic mountain grasslands undergo major changes in their composition and structure after abandonment of their use as pastures or hay meadows. Distinct plant community-types may develop in habitats that differ in environmental conditions, such as soil water availability; however, few studies have addressed this issue in abandoned anthropogenic grasslands. Aims To quantify the effects of topographic factors and variables related to soil water availability on α and β taxonomic diversity (TD) and functional diversity (FD) to assess the role of landform heterogeneity in shaping vegetation structure. Methods We classified the vegetation of long-abandoned central Apennine pastures and related their species composition and diversity to environmental variables. Results We identified four community-types whose distribution was related to topographically determined soil water availability. The species composition of drought-tolerant communities on south-eastern slopes with shallow soils was largely similar to that of anthropogenic grasslands. Resource-poor conditions were related to enhanced α-TD and β-TD and reduced α-FD for traits related to temporal niche differentiation and resource acquisition strategies. Conclusion In long-abandoned sub-Mediterranean grasslands, landform heterogeneity guarantees a certain level of TD and FD at the landscape scale, contrasting the assumed role of abandonment of grazing on homogenisation of vegetation features.

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环境异质性补偿了亚地中海山地景观中放弃放牧的潜在均质效应

摘要/ ABSTRACT背景:人为山地草地在放弃牧场或草甸的使用后，其组成和结构发生了重大变化。不同的植物群落类型可能在不同的环境条件下发展，例如土壤水分的有效性;然而，很少有研究在废弃的人为草地中解决这一问题。目的量化地形因子和土壤水分有效性相关变量对α和β分类多样性(TD)和功能多样性(FD)的影响，以评估地形异质性对植被结构的影响。方法对亚平宁中部长期废弃牧场进行植被分类，并将其物种组成和多样性与环境变量进行关联。结果鉴定出四种不同类型的群落，其分布与地形决定的土壤水分有效性有关。东南浅层土壤坡地耐旱群落的物种组成与人工草地基本相似。资源贫乏条件下，与时间生态位分化和资源获取策略相关的α-TD和β-TD增强，α-FD降低有关。结论在位sub-Mediterranean草原、地形异质性保证一定程度的TD和FD在景观尺度,对比放弃放牧的假定作用在植被均化特性。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.