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首页> 外文期刊>African Entomology >Distribution and diversity of epigaeic invertebrate assemblages in Silaka Nature Reserve, Eastern Cape, South Africa
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Distribution and diversity of epigaeic invertebrate assemblages in Silaka Nature Reserve, Eastern Cape, South Africa

机译：南非东开普西拉卡自然保护区表生无脊椎动物组合的分布和多样性

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摘要

Disturbance in habitat complexity and niche availability affect competitive interactions between faunal species which may result in their extinction. This study was conducted to assess the conservation value of four a priori selected sites, A: 'minimally disturbed natural forest patch', B: 'herbaceous grassland patch', C: 'road verge patch' and D: 'highly disturbed natural forest patch' using epigaeic invertebrate assemblages in Silaka Nature Reserve. A total of 2415 specimens belonging to three phyla (Arthropoda, Mollusca and Annelida) were caught from all sites using pitfall traps, and these were sorted into 14 orders, 15 families, 21 species and 17 morphospecies. Multivariate approaches using canonical correspondence analysis (CCA) showed that some measured site variables, e.g. litter depth, grazing intensity, soil pH, soil phosphorus content and texture (percentage clay and silt) accounted for species distribution trends across sites. Site A had both common/widespread and rare/typical invertebrate taxa, and therefore was of high value for conserving invertebrate biotic communities within the reserve. The other three sites also offered optimal and unique habitat requirements for protecting and preserving species such as Ancylotrypha zuluensis,Lycosidae sp. 2, and the Opiliones. Biotope management in the reserve should therefore aim at preserving a variety of habitat patches that differ in structural and compositional vegetation. Furthermore, anthropogenic pressures resulting from frequent clearing should be regulated especially during the summer to cater for various developmental (including immature) stages of the invertebrate assemblage of the reserve.
机译：栖息地复杂性和生态位可用性的扰动会影响动物物种之间的竞争性相互作用，从而可能导致其灭绝。进行这项研究的目的是评估四个先验选定地点的保护价值，A：“受到最小干扰的天然森林斑块”，B：“草皮草原斑块”，C：“道路边缘斑块”和D：“受到高度干扰的天然森林斑块”在Silaka自然保护区中使用表皮无脊椎动物组合。使用陷阱陷阱从所有地点总共捕获了2415个属于三个门（节肢动物，软体动物和猫科动物）的标本，这些标本被分为14个科，15科，21种和17种形态。使用规范对应分析（CCA）的多变量方法显示，某些测得的站点变量（例如凋落物深度，放牧强度，土壤pH，土壤磷含量和质地（粘土和粉砂的百分比）说明了地点间的物种分布趋势。地点A具有常见/广泛分布的和罕见/典型的无脊椎动物类群，因此对于保护保护区内的无脊椎动物生物群落具有很高的价值。其他三个地点还提供了最佳和独特的栖息地要求，以保护和保存祖种（Ancylotrypha zuluensis，Lycosidae sp。）。 2，和Opiliones。因此，保护​​区的生物群落管理应旨在保护结构和组成植被不同的各种生境斑块。此外，应对频繁清理造成的人为压力进行调节，尤其是在夏季，以适应保护区无脊椎动物组合的各种发育（包括未成熟）阶段。

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