Spatial variability of insect communities in a homogenous system:: Measuring biodiversity using Malaise trapped beetles in a Pinus radiata plantation in New Zealand
Spatial variability of insect communities in a homogenous system:: Measuring biodiversity using Malaise trapped beetles in a Pinus radiata plantation in New Zealand
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DOI：
10.1016/s0378-1127(98)00495-2
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发表时间：
1999-06-14
影响因子：
3.7
通讯作者：
Jones, D
中科院分区：
文献类型：
--
作者：
Hutcheson, J;Jones, D
采用虫诱法对Kaingaroa林二次轮作辐射松林分昆虫群落进行了研究。样本的采集时间为成虫活动期，这段时间以前被证明对来自新西兰生境的样本有最好的鉴别效果。14年辐射松林分的8个诱捕点提供了这种相对均匀的森林环境中群落变化的指示。相邻年轻（5岁）和年长（30岁）林分的单一诱捕点提供了初步的旋转内比较。3个林龄的甲虫组合不能用相似性和多样性指标进行区分，但用分裂聚类分析可以明显区分。林龄是区分聚类的主要因素，5年林龄的聚类差异最大。14年林分渔获的聚类受捕获周数（时间变化）的影响大于捕集地点（空间变化）的影响。在14年林分内，丰度的变化与优势碎屑种类、碎屑资源的范围和邻近程度有关。物种丰富度较为稳定，但组成物种有较大的变化。营养结构也相对一致，可能由于对物种生活史的无知而出现异常的明显变化。在旋转过程中，昆虫样品的连续过程是明显的。30年林分的甲虫群落主要集中在轮替中期，但组成物种的相对丰度发生了变化。3个年龄级林分的甲虫组合均以特有的腐殖物种类为主，反映了在这一快速生长的外来植被系统中不断添加木质碎屑。(C) 1999 Elsevier Science B.V.版权所有
Insect communities of second rotation Pinus radiata stands in Kaingaroa forest were characterised using Malaise trapped beetles. Samples were collected from the part of the adult beetle activity period previously shown to deliver best discrimination of samples from New Zealand habitats. Eight trap-sites within a 14-year-old Pinus radiata stand provide indications of community variation within this relatively homogenous forest environment. Single trap-sites in adjacent younger (five-year-old) and older (30-year-old) stands provided initial intra-rotation comparison.Beetle assemblages from the three stand ages were unable to be discriminated using similarity or diversity indices, but were clearly distinguishable using divisive cluster analysis. Age of stands was of primary importance in distinguishing clusters, with those from the five-year-old stand being most dissimilar. Clustering of catches from within the 14-year-old stand was influenced more by week of capture (temporal variation) than trap-site (spatial variation).Within the 14-year-old stand, variation of abundance was associated with dominant detritivore species, and the extent and proximity of debris resources. Species richness was more constant, although considerable variation in component species was recorded. Trophic structure was also relatively consistent, with anomalous apparent variation possibly due to ignorance of species life histories. Successional processes were apparent within the insect samples over the rotation. The majority of the beetle assemblage from the 30-year-old stand were present at mid-rotation, but relative abundance of component species had changed. Beetle assemblages from all three age classes of stands were dominated by endemic detritivore species, reflecting the constant addition of woody debris within this rapid growing exotic vegetation system. (C) 1999 Elsevier Science B.V. All rights reserved.