海拔对表居土壤动物不同取食功能群多度分布的影响

发布时间：2018-06-09 12:12

本文选题：土壤动物群落 + 食性　；参考：《土壤学报》2017年01期

【摘要】：物种多度分布格局是群落生态学研究的前沿领域之一。海拔梯度下开展土壤动物多度分布研究有利于认识分解者群落的构建过程如何响应环境变化。选用5种常见的生态位分配模型(断棍模型、生态位优先占领模型、生态位重叠模型、随机分配模型和优势优先模型),分别采用个体数量与生物量作为多度表征指标,对分布于北京东灵山辽东栎林下不同海拔范围的表居土壤动物群落整体与不同取食功能群(杂食者、植食者、捕食者、腐食者)的相对多度分布进行研究。结果表明,拟合表居土壤动物群落整体的最优生态位分配模型不受海拔影响,均为断棍模型。但表居土壤动物各功能群多度分布受海拔影响,杂食者随海拔升高,最优模型由断棍模型转变为生态位优先占领模型,而植食者与之相反。多度表征指标选择影响拟合表居土壤动物不同功能群(捕食者和腐食者)多度分布的最优模型。总体而言,海拔和多度指标选择并未影响表居土壤动物整体的多度分布,但对表居土壤动物中不同取食功能群的多度分布有影响。
[Abstract]:Species abundance distribution pattern is one of the frontier fields in community ecology. The study of soil animal abundance distribution at the altitude gradient is helpful to understand how the construction process of the decomposer community responds to environmental changes. Five common niche allocation models (broken stick model, niche priority occupation model, niche overlap model, random allocation model and dominant priority model) were selected. The distribution of relative abundance of soil fauna communities and different feeding function groups (omnivore, herbivore, predator, saproot) under the oak forest in Dongling Mountain, Beijing, was studied. The results showed that the optimal niche allocation model of the soil fauna community was not affected by altitude, but was a broken bar model. However, the abundance distribution of various functional groups of soil fauna was affected by altitude. The optimal model of omnivore changed from the broken stick model to the niche priority occupation model with the increase of altitude, whereas the herbivore was the opposite. The optimal model for fitting the abundance distribution of different functional groups of soil animals (predator and saproot) was studied. In general, the selection of altitude and abundance index did not affect the abundance distribution of the soil animals, but had an effect on the abundance distribution of different feeding function groups in the soil animals.
【作者单位】：中国科学院生态环境研究中心城市与区域生态国家重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(31470481)资助~~
【分类号】：S154

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