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首页> 外文期刊>Aquatic Sciences >Sediment size influences habitat selection and use by groundwater macrofauna and meiofauna
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Sediment size influences habitat selection and use by groundwater macrofauna and meiofauna

机译：沉积物大小影响栖息地选择和地下水Macrofauna和Meiofauna的使用

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Understanding environmental factors that influence obligate groundwater dwelling (stygobiotic) fauna is crucial for groundwater ecosystem monitoring and management. Field studies have indicated geological factors are a major influence on the abundance and richness of stygofauna, however the precise mechanisms and true influence of the aquifer sediment matrix on biota is unclear. In this study we examined the habitat use and preferences, in terms of sediment particle sizes, of stygobiotic meiofauna (Harpacticoida and Cyclopoida Copepoda), and macroinvertebrates (Amphipoda and Syncarida) using laboratory microcosms. We first tested the ability of each taxon to use (move into) clay (0.06mm), sand (0.3-0.7mm) and gravel sediments (2-4mm). Subsequently, the preference for each sediment was compared by examining the distribution of animals in microcosms containing two different sediment types. Both the harpacticoids and cyclopoids were able to use clay, whereas larger amphipods and syncarids mostly remained on the sediment surface. All taxa were able to use sand and gravel substrates. Amphipods preferred gravel over sand and clay. Both copepods and syncarids preferred sand and gravel over clay, but showed no preference between gravel and sand. This study demonstrates the general inability of some stygobiotic macroinvertebrates to use clay sediments and overall differences in sediment use among stygobiotic meio- and macrofauna. From these findings, the typically heterogenous distributions and diversity of stygofauna observed in field studies may be related to variability in sediment composition.
机译：了解影响义金地下水住所（Stygobiotic）动物的环境因素对于地下水生态系统监测和管理至关重要。现场研究表明，地质因素是对斯蒂哥苏纳的丰富和丰富性的主要影响，然而，含水层沉积物基质对生物症的确切机制和真实影响尚不清楚。在这项研究中，我们使用实验室微观审查了沉积物颗粒（HarpactioIroda和Cyclopoida Copopoda）的沉积物粒度，以及使用实验室微观的大脊椎动物（Amphipoda和Syncarida）的栖息地使用和偏好。我们首先测试了每个分类群使用（进入）粘土（<0.06mm），沙（0.3-0.7mm）和砾石沉积物（2-4mm）的能力。随后，通过检查含有两种不同沉积物类型的微观微观的动物的分布来比较对每个沉积物的偏好。 Harpacticoids和Cyperopoids都能够使用粘土，而较大的两种和Syncarids大多是沉积物表面。所有分类群都能够使用沙子和砾石基板。 Amphipods优选的砾石在沙子和粘土上。桡足类和Syncarids在粘土上首选沙子和砾石，但在砾石和砂之间没有偏好。本研究表明，一些胸腔内脊椎动物的一般不能使用粘土沉积物和沉积物中的沉积物中使用的总体差异，并在肺炎中使用沉积物。从这些发现中，在现场研究中观察到的静脉曲生的典型异质分布和多样性可能与沉积物组成的可变性有关。

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