Analysis of the elements of metacommunity structure in a Mediterranean basin: implications in the framework of global change

IF 2 3区 环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES
Alejandra Tierno-Cinque, José Manuel Tierno de Figueroa, Julio Miguel Luzón-Ortega, Manuel Jesús López-Rodríguez
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引用次数: 0

Abstract

Metacommunity studies have been gaining in importance in recent decades due to their relevance when interpreting community dynamics. The elements of metacommunity structure (EMS), i.e. coherence, turnover and boundary clumping, are used to assess the assembly of metacommunities. In the present study we analysed the EMS of the Guadiana Hydrographic Demarcation, a prominant seasonal basin located in the southern Iberian Peninsula characterised by a Mediterranean climate, with dry reaches and disconnected pools frequent in streams during the summer. We studied the EMS of the four different taxocoenoses used to assess the ecological status of streams and rivers according to the European Water Framework Directive (diatoms, macrophytes, macroinvertebrates and fishes), both independently of each other and taken together. These analyses were carried out using three different approaches: (1) using a gradient from reciprocal averaging analysis; (2) following a geographical gradient; and (3) following an environmental gradient. We found that the four groups of organisms analysed had either a Clementsian metacommunity structure or a similar structure. When all groups were considered together, the structure of the metacommunity was Clementsian or quasi-Clementsian. Thus, in the framework of the current global change scenario, communities in this basin may be vulnerable to increasing isolation due to more frequent and larger dry periods; consequently, management measures should be considered.

地中海盆地元群落结构要素分析:在全球变化框架下的意义
近几十年来,元社区研究因其在解释社区动态方面的相关性而变得越来越重要。利用元群落结构(EMS)要素,即相干性、周转性和边界聚集性来评价元群落的聚集性。在本研究中,我们分析了Guadiana水文分界线的EMS,这是位于伊比利亚半岛南部的一个突出的季节性盆地,以地中海气候为特征,在夏季,溪流中经常出现干燥的河段和断开的水池。根据欧洲水框架指令,我们研究了用于评估溪流和河流生态状况的四种不同分类科(硅藻、大型植物、大型无脊椎动物和鱼类)的EMS,它们彼此独立,也相互结合。这些分析使用三种不同的方法进行:(1)使用倒数平均分析的梯度;(2)遵循地理梯度;(3)遵循环境梯度。我们发现所分析的四组生物要么具有克莱门特式元群落结构,要么具有类似的结构。当将所有群体放在一起考虑时,元群落的结构为Clementsian或准Clementsian。因此,在当前全球变化情景的框架下,由于干旱期更频繁和更大,该流域的社区可能容易受到日益孤立的影响;因此,应考虑管理措施。
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来源期刊
Aquatic Sciences
Aquatic Sciences 环境科学-海洋与淡水生物学
CiteScore
3.90
自引率
4.20%
发文量
60
审稿时长
1 months
期刊介绍: Aquatic Sciences – Research Across Boundaries publishes original research, overviews, and reviews dealing with aquatic systems (both freshwater and marine systems) and their boundaries, including the impact of human activities on these systems. The coverage ranges from molecular-level mechanistic studies to investigations at the whole ecosystem scale. Aquatic Sciences publishes articles presenting research across disciplinary and environmental boundaries, including studies examining interactions among geological, microbial, biological, chemical, physical, hydrological, and societal processes, as well as studies assessing land-water, air-water, benthic-pelagic, river-ocean, lentic-lotic, and groundwater-surface water interactions.
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