Uncovering the environmental factors that influence diversity patterns of Mediterranean terrestrial Gastropod communities: a useful tool for conservation

Bros Vicenc; Torre Ignasi; Santos Xavier

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Uncovering the environmental factors that influence diversity patterns of Mediterranean terrestrial Gastropod communities: a useful tool for conservation

机译：揭示影响地中海陆栖腹足动物群落多样性模式的环境因素：保护的有用工具

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Land snails are an important component of biodiversity but the information regarding the factors that influence their distribution is very incomplete or anecdotal in most geographic areas. In this article our aim was to uncover environmental factors that influence the distribution and diversity of a Gastropoda community in a Mediterranean Reserve (Collserola Natural Park, Barcelona). Fieldwork was conducted from 2001 to 2003, and we systematically sampled all 1 km(2) UTM squares throughout the park by randomly selecting at least one 200 m(2) plot within each square. We used a community-based approach to analyse the relationships between 61 Gastropod species distributions and environmental predictors by means of Redundancy Analysis (RDA). Our results highlighted that the land snail community was affected by the environmental predictors (even for short gradients), but their influence was low according to the explained variance (30 %). Climate and habitat predictors were more important than the spatial variables in determining the community composition and diversity. 48 out of 61 (78.7 %) land snail species showed significant responses to the environmental gradients with an association of specialist species with particular habitat types. Collserola is a reserve surrounded by urbanised areas and affected by multiple anthropogenic threats mostly related to habitat transformation. The high degree of specialisation within the Gastropoda community suggests that the restoration of heterogeneous landscapes would be useful to conserve and restore terrestrial mollusc diversity in Collserola. This study can help stakeholders to make decisions related to landscape planning and habitat transformation.

机译：蜗牛是生物多样性的重要组成部分，但在大多数地理区域中，有关影响其分布的因素的信息非常不完整或不完整。在本文中，我们的目的是发现影响地中海保护区（Collserola自然公园，巴塞罗那）中腹足纲动物群落分布和多样性的环境因素。从2001年到2003年进行了实地考察，我们通过在每个公园内随机选择至少一个200 m（2）地块，对整个公园内所有1 km（2）UTM广场进行了系统采样。我们采用了一种基于社区的方法，通过冗余分析（RDA）分析了61种腹足纲动物物种分布与环境预测因子之间的关系。我们的研究结果强调了蜗牛的群落受到环境预测因子的影响（即使对于短梯度而言），但根据所解释的方差（30％），它们的影响很小。在确定群落组成和多样性方面，气候和栖息地预测因素比空间变量更为重要。 61种陆地蜗牛物种中有48种（78.7％）对环境梯度表现出显着响应，其中包括特殊物种与特定栖息地类型的关联。 Collserola是一个被城市化地区包围的自然保护区，受到许多与栖息地转变有关的人为威胁的影响。腹足纲群落的高度专业化表明，异质景观的恢复将有助于保护和恢复Collserola的陆地软体动物多样性。这项研究可以帮助利益相关者做出与景观规划和栖息地转变有关的决策。

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《Ecological research》 |2016年第1期|39-47|共9页
作者
Bros Vicenc; Torre Ignasi; Santos Xavier;
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作者单位

Diputacio Barcelona C Urgell, Oficina Tecn Parcs Nat, Barcelona 08036, Spain;

Museu Granollers Ciencies Nat, Barcelona 08402, Spain;

Univ Porto, Ctr Invest Biodiversidade & Recursos Genet, CIBIO InBIO, P-4485661 Vairao, Portugal;

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正文语种 eng
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关键词
Biodiversity; Environmental factors; Terrestrial mollusc; Land snails; Mediterranean basin;

机译：生物多样性;环境因素;陆地软体动物;蜗牛;地中海盆地;

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Uncovering the environmental factors that influence diversity patterns of Mediterranean terrestrial Gastropod communities: a useful tool for conservation

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