|其他题名: ||Taxonomy and Ecology of Terrestrial Enchytraeidae (Clitellata, Annelida) from China|
参照Nielsen & Christensen(1959, 1961, 1963)和Schemlz (2003)分类系统和前人的研究结果，总结出中国陆栖线蚓的最新分类名录共17属81种，其中包括本文记述的8新种和21新纪录种。为进一步丰富我国线蚓研究的基础资料，作者本人采集到的物种以及新种和新纪录种进行了系统的描述，并附有手绘图和照片。
定量研究的工作集中在吉林省长白山北坡，对该地区线蚓分布和生物多样性进行了系统的摸底调查，共鉴定9属29种。种类最多的属依次是白线蚓属(8种)、亨利蚓属(6)和中线蚓属(5)。优势属类群依次为中线蚓属 (38.8%)，亨利蚓属 (28.3%)，白线蚓属 (19.7%)和苔丝蚓属 (6.9%)。同时发现线蚓群落结构与植被类型和海拔密切相关。随着海拔的升高线蚓密度、物种丰富度总体呈下降趋势。
|英文摘要: ||Enchytraeidae is one of the most specious clitellata groups. To date, all some 650 valid species of 31 genera are known. These tiny potworms are a critical component of terrestrial ecosystems, and play key roles in regulating ecosystem processes of decomposition and nutrient mineralization. In China, however, because these worms were ignored until the late twenties, there taxonomy as well as their biology has become a subject of study only recently. Compared to the other microdrile oligochaetes, related researches on Enchytraeidae started late and lagged far behind.
In this paper, a serial surveys were carried out in Yunnan, Hunan, Hubei, Guizhou, Shangdong, Jilin Provinces and Chongqing Municipality. More than 50 terrestrial species were identified. On the basis of this, the faunal composition, biodiversity and distribution of enchytraeids were discussed thoroughly in Changbai Mountain. In addition, the relationships between enchytraeids and environmental factors were discussed. The main results are summarized as follows:
A taxonomic catalogue of Enchytraeidae from China was listed according to Nielsen & Christensen (1959, 1961, 1963) and Schemlz (2003) classification systems and the previous research findings. 81 taxa belonging to 17 genera were presented. Further, 8 new species: Bryodrilus fuscistriatus; Fridericia dianchiensis; Oconnorella cheni; Oconnorella globula; Fridericia liangi; Mesenchytraeus anisodiverticulus; Mesenchytraeus megachaetus; Mesenchytraeus monodiverticulus, 21 new records species and one new record genus (Cognettia) were added to the catalogue and were fully described and illustrated by drawings and pictures.
Quantitative researches concentrated on the northern slope of Changbai Mountain. The distribution of enchytraeid communities and biodiversities in this region were investigated. 29 species belonging to 9 genera were found. The richnest genera were Fridericia (8 species), Henlea (6) and Mesenchytraeus (5). The predominant groups were Mesenchytraeus (38.8% of the total abundance), Henlea (28.3%), Fridericia (19.7%) and Bryodrilus (6.9%). The results suggested that types of plants and altitude play an important role in shaping the community structure and species divesities of enchytraeid. Along with the increased altitude, the density and richness of Enchytraeid showed a decreased trend.
Constrained ordination analysis (CCA) was applied to identify the relationship between enchytraeid community structures and environmental factors (including 3 basin variables and 11 habitat variables) in 18 sampling sites. The results showed that the depth of litter layer, altitude, the content of K and soil moisture were the most important factors influenced enchytraeid community structures, and explained ca. 43% of the total variations. In general, the structure and distribution of enchytraeids in the Changbai Mountain were mainly controled by habitat factors other than regional parameters.|
|Appears in Collections:||中科院水生所知识产出（2009年前）_学位论文|
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