In Nov. 2005, the macrobenthic community and niche analysis at creeks in three diked tidal flats were studied at Lingkun Island, Wenzhou City, Zhejiang Province. The result revealed 31 species belonging to 19 families...In Nov. 2005, the macrobenthic community and niche analysis at creeks in three diked tidal flats were studied at Lingkun Island, Wenzhou City, Zhejiang Province. The result revealed 31 species belonging to 19 families, 7 classes and 6 phyla most of which were gastropoda, lamellibranchia, crustacea and polychaeta. In the different habitats of the creeks (the grass flat, the bank of creek and the bottom of the creek), the composition and abundance of the macrobenthic differed. There were 16 species in the grass flat, 21 species in the bank of the creek and 13 species at the bottom of creek. The macrobenthic structure and life forms of the creeks were different in these three habitats, and showed that the creeks changed regularly with the environment factors. In general, the Margalef’s species diversity index: BaC > BoC > GF; the Shannon-Wiener’s index: BaC > Boc > GF; the Pielou’s index: BoC > BaC > GF; the Simpson’s index: GF > BaC > BoC. The analysis of the niche breadth and niche overlap showed that these two were closed related to the distribution and density of the species, which revealed that the niche breadth and the niche overlaps reflect the species distribution, the abundance and the species ability of utilizing the environmental resource. Combined with the data of the four times extraction of the density of macrobenthic species, using the Hierarchical Cluster of between-groups linkage method and the Non-matric Multidimentional Scaling method, these species could be assigned to several groups.展开更多
2008年秋季在浙江景宁望东洋溪源湿地对5种代表性样地的土壤动物进行了调查.结果显示:望东洋溪源湿地的土壤动物隶属4门7纲17目,其中优势类群为弹尾目、双翅目、膜翅目,常见类群为蜱螨目、线虫目、鞘翅目、同翅目、等翅目和半翅目,其他...2008年秋季在浙江景宁望东洋溪源湿地对5种代表性样地的土壤动物进行了调查.结果显示:望东洋溪源湿地的土壤动物隶属4门7纲17目,其中优势类群为弹尾目、双翅目、膜翅目,常见类群为蜱螨目、线虫目、鞘翅目、同翅目、等翅目和半翅目,其他均为稀有类群;土壤动物群落复杂性指数(C)为针阔混交林>阔叶林>稀疏小乔木林>五节芒草丛>白茅草丛,Shannon-W e iner指数(H′)和P ielou均匀性指数(J)呈显著负相关;望东洋溪源湿地土壤动物的表聚性现象明显.根据5种植被类型下土壤动物的聚类和二维非度量标度排序(MDS)的结果,可将土壤动物分为3种类型,即湿润江南桤木林型、干燥乔木林型和杂草型,反映了土壤动物群落对湿地不同植被类型的响应;并依此推断含水量和植被的盖度,尤其是灌木盖度可能是影响土壤动物群落特征的主要因素.展开更多
文摘In Nov. 2005, the macrobenthic community and niche analysis at creeks in three diked tidal flats were studied at Lingkun Island, Wenzhou City, Zhejiang Province. The result revealed 31 species belonging to 19 families, 7 classes and 6 phyla most of which were gastropoda, lamellibranchia, crustacea and polychaeta. In the different habitats of the creeks (the grass flat, the bank of creek and the bottom of the creek), the composition and abundance of the macrobenthic differed. There were 16 species in the grass flat, 21 species in the bank of the creek and 13 species at the bottom of creek. The macrobenthic structure and life forms of the creeks were different in these three habitats, and showed that the creeks changed regularly with the environment factors. In general, the Margalef’s species diversity index: BaC > BoC > GF; the Shannon-Wiener’s index: BaC > Boc > GF; the Pielou’s index: BoC > BaC > GF; the Simpson’s index: GF > BaC > BoC. The analysis of the niche breadth and niche overlap showed that these two were closed related to the distribution and density of the species, which revealed that the niche breadth and the niche overlaps reflect the species distribution, the abundance and the species ability of utilizing the environmental resource. Combined with the data of the four times extraction of the density of macrobenthic species, using the Hierarchical Cluster of between-groups linkage method and the Non-matric Multidimentional Scaling method, these species could be assigned to several groups.
文摘2008年秋季在浙江景宁望东洋溪源湿地对5种代表性样地的土壤动物进行了调查.结果显示:望东洋溪源湿地的土壤动物隶属4门7纲17目,其中优势类群为弹尾目、双翅目、膜翅目,常见类群为蜱螨目、线虫目、鞘翅目、同翅目、等翅目和半翅目,其他均为稀有类群;土壤动物群落复杂性指数(C)为针阔混交林>阔叶林>稀疏小乔木林>五节芒草丛>白茅草丛,Shannon-W e iner指数(H′)和P ielou均匀性指数(J)呈显著负相关;望东洋溪源湿地土壤动物的表聚性现象明显.根据5种植被类型下土壤动物的聚类和二维非度量标度排序(MDS)的结果,可将土壤动物分为3种类型,即湿润江南桤木林型、干燥乔木林型和杂草型,反映了土壤动物群落对湿地不同植被类型的响应;并依此推断含水量和植被的盖度,尤其是灌木盖度可能是影响土壤动物群落特征的主要因素.
