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首页> 外文期刊>Applied Soil Ecology >Interactive effects between vegetation structure and soil fertility on tropical ground-dwelling arthropod assemblages
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Interactive effects between vegetation structure and soil fertility on tropical ground-dwelling arthropod assemblages

机译：热带地面居住节肢动物组合的植被结构与土壤肥力之间的互动影响

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The development of forests undergoing restoration determines the structure of the vegetation, influencing ground-dwelling arthropod composition. Soil fertility can interact with vegetation structure, influencing the diversity and composition of arthropod assemblages through bottom-up effects on developing forests. We evaluated if soil fertility (here defined by the attributes directly related to macronutrient availability) and the vegetation structure in three adjacent areas from different land-use/cover categories (abandoned pasture, riparian forest undergoing restoration, and remnant riparian forest) influences ground-dwelling arthropod assemblages. These areas were subject to a gradient of soil fertility due to the presence of a corral that resulted in a local increase of soil nutrients in the three areas, enabling to evaluate the interaction between soil fertility and vegetation structure. We hypothesized that ground-dwelling arthropod assemblages have lower diversity in pasture, intermediate in forest undergoing restoration and higher diversity in the remnant forest. Furthermore, we expected that increasing soil fertility would have a positive effect in these assemblages through bottom-up effects. Environmental conditions were characterized by vegetation structure and soil chemical attributes variables, whereas arthropods were sampled with pitfalls and identified to morphospecies. Diversity indicators responded differentially to the studied effects. Abundances decreased with soil fertility, and were higher in the forest undergoing restoration, followed by pasture and remnant forest. Species richness also varied among categories, following the same pattern as abundances. On the other hand, diversity indices indicated an interaction between soil fertility and land use category, with larger effects of soil fertility on diversity in the more simplified habitats (pasture and forest undergoing restoration), whereas no bottom-up effects were recorded in the remnant forest; species evenness increased with soil fertility in all studied areas. A redundancy analysis (RDA) indicated that both vegetation structure and soil attributes significantly influenced arthropod composition. Arthropod assemblages in areas undergoing restoration with higher soil fertility and low grass cover were more similar to assemblages in remnant forest when compared to areas with low soil fertility, independently of the vegetation structure, indicating an interaction between these two effects. Therefore, ground-dwelling arthropod assemblages responded both to increasing vegetation complexity resulting from the different land use/cover categories, and to increasing soil fertility, so that they are effective indicators to evaluate the recovery of ecosystems in forest restoration projects and to determine the importance of soil fertility in this process.
机译：接受恢复森林的发展决定了植被的结构，影响了地面居住节肢动物组合物。土壤肥力可以与植被结构相互作用，影响节肢动物组合的多样性和组成，通过对发展森林的自下而上影响。我们评估土壤肥力（这里由与Macronutrient可用性直接相关的属性定义）以及来自不同土地使用/覆盖类别的三个相邻地区的植被结构（被废弃的牧场，经历恢复和残余河流林）影响地面 - 住宅节肢动物组合。由于存在畜栏的存在，这些区域受土壤肥力的梯度，导致三个区域的土壤营养素增加，使得能够评估土壤肥力和植被结构之间的相互作用。我们假设地面居住节肢动物组合在牧场中具有较低的多样性，森林中间的森林中恢复和较高的森林多样性。此外，我们预计通过自下而上效应，越来越多的土壤肥力将在这些组合中具有积极的影响。环境条件的特​​征是植被结构和土壤化学属性变量，而节肢动物被陷入困境并鉴定为Morphospecies。多样性指标对研究的效果差异差异。丰富的土壤肥力下降，森林经历恢复后较高，其次是牧场和残余林。物种丰富度也在类别中变化，遵循与丰富相同的模式。另一方面，多样性指数表明了土壤肥力和土地利用类别之间的相互作用，土壤肥力对更简单的栖息地（牧草和恢复的牧草）的多样性影响，而残余物中没有记录自下而上效应森林;物种均匀性随着土壤肥力的增加而增加。冗余分析（RDA）表示植被结构和土壤属性都显着影响了节肢动物组合物。与具有低土壤肥力的区域相比，在较高土壤肥力和低草覆盖的地区接受恢复的地区的节肢动物组合与植被结构的较低的区域更相似，表明这两种效果之间的相互作用。因此，地面居住的节肢动物组合组件响应了不同土地使用/覆盖类别产生的植被复杂性，并增加土壤肥力，从而有效指标，以评估森林修复项目中生态系统的恢复并确定重要性土壤肥力在这一过程中。

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