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首页> 外文期刊>Estuarine Coastal and Shelf Science >Effects of two antagonistic ecosystem engineers on infaunal diversity
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Effects of two antagonistic ecosystem engineers on infaunal diversity

机译：两名对抗性生态系统工程师对信息多样性的影响

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摘要

The role of ecosystem engineers has been highlighted in recent decades because of their importance for ecosystem functioning, although the interaction between different antagonistic engineer species and their effects on ecosystems have been so far poorly investigated. Coastal areas are good natural laboratories to explore such interactions, since they are often inhabited by macrophyte beds (autogenic engineers) and bioturbator species (allogenic engineers) with antagonistic effects on ecosystem properties and processes (e.g. species diversity, nutrient fluxes, etc.). The main goal of this study was to determine how coexisting antagonistic ecosystem engineers could influence benthic diversity and available resources in soft-bottom areas. To achieve this goal, a two-month experiment was carried out in situ by introducing artificial seagrass patches in a soft-bottom area inhabited by the fiddler crab Uca tangeri. Both the experimental exclusion of burrows as well as the presence of artificial seagrass-like structures (mimics) resulted in higher macrobenthic density and species richness in the benthic community. Resource availability for organisms (sediment chlorophyll a and epiphytes) was also favoured by the presence of mimics. Therefore, the higher structural complexity (above- and below-ground) associated with seagrass mimics promoted positive effects for infauna such as creation of a new habitat ready to colonize, reduction of the crab burrowing activity and the enhancement of resource availability, which resulted in increased diversity in the benthic community.
机译：尽管到目前为止，对敌对工程师物种之间的相互作用及其对生态系统的影响的研究还很不充分，但由于生态工程师对生态系统功能的重要性，近来他们的作用得到了强调。沿海地区是探索此类相互作用的良好自然实验室，因为沿海地区经常被大型植物床（自生工程师）和生物扰动物种（同种异体工程师）所居住，对生态系统特性和过程（例如物种多样性，养分通量等）产生拮抗作用。这项研究的主要目标是确定并存的对立生态系统工程师如何影响底栖生物多样性和软底地区的可用资源。为了实现这一目标，在提琴蟹Uca tangeri居住的软底区域引入了人工海草斑块，进行了为期两个月的原位实验。在实验中排除洞穴以及存在人工海草样结构（模拟物）都会导致底栖动物群落中较高的大型底栖动物密度和物种丰富度。模拟物的存在也有利于生物体（沉积物叶绿素a和附生植物）的资源利用。因此，与海草模拟物相关的较高的结构复杂性（地上和地下）促进了对盗贼的积极影响，例如创造了一个易于定居的新栖息地，减少了蟹的穴居活动和增加了资源的利用，从而导致底栖生物群落的多样性增加。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2014年第20期|20-26|共7页
  • 作者

    V. Gonzalez-Ortiz; P. Alcazar; J.J. Vergara; J.L. Perez-Llorens; F.G. Brun;

  • 作者单位

    Department of Biology, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

    Department of Biology, Faculty of Marine and Environmental Sciences, University of Cadiz, 11510 Puerto Real, Cadiz, Spain;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    ecosystem engineers; infauna; artificial seagrass; diversity; fiddler crab; belowground network;

    机译：生态系统工程师;盗贼人工海草多样性招潮蟹地下网络;

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