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Four indexes of species diversity (H''), species richness (d), species evenness (J) and species dominance (D2) are used in this paper to analyse the.characteristics of the benthic faunal community structure in the soft-bottom intertidal zone along the northern coast of the Hang-zhou Bay.The results show a rather simple benthic faunal community structure in the survey area, with the average values of the four indexes from the five transects, namly, H''=2.06, d=3.34, J=0.46 and D2=0.73.Different degrees of the seasonal and regional variations have been observed from each index per transect. 相似文献
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Four indexes of species diversity (H'), species richness (d), species evenness (J) and species dominance (D2) are used in this paper to analyse the .characteristics of the benthic faunal community structure in the soft-bottom intertidal zone along the northern coast of the Hang-zhou Bay. The results show a rather simple benthic faunal community structure in the survey area, with the average values of the four indexes from the five transects, namly, H'=2.06, d=3.34, J=0.46 and D2=0.73. Different degrees of the seasonal and regional variations have been observed from each index per transect. 相似文献
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台湾海峡西部近海底栖生物生态初步研究 总被引:5,自引:0,他引:5
1961-1964年于台湾海峡西部近海进行了七航次调查,其范围为23°20'-25°54'N,117°11'-119°58'E,水深一般不超过50米,布设了定量采泥189站和定性拖网33站. 本次调查获得的底栖动物已鉴定到种的共392种.种类组成特点:以近岸浅水种占主导地位,而且热带亚热带种占绝对优势,显示了台湾海峡具有热带海区的特征.本海区底栖生物生物量总平均为38.0克/米2,平均密度为116个/米2,生物量组成以棘皮动物占优势,其次是软体动物. 群落的分布特点:(1)阳遂足-海地瓜群落属于近岸低盐性质,主要分布在平潭岛以北受闽江径流影响较大的水域,底质为软泥.(2)歪刺锚参-薄倍棘蛇尾-浅缝合骨螺群落则广泛分布于调查海区,群落种类繁多,结构较复杂.底质为软泥.(3)麦氏偏顶蛤-刘五店沙鸡子-阿曼吉娅虫群落以细砂底为主,局限于北部海区.(4)厦门文昌鱼-瑰斑竹蛏-中华岩鳃-多鳃欧努菲虫群落则以粗、中砂为主,仅分布于南部海区.(5)日本俏羽枝-布纹蚶群落分布在港湾的出口处或岛屿之间,流速较大,底质为砾石或石块. 相似文献
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本文根据台湾海峡西部海域调查中采集的标本进行鉴定研究,发现了沙蚕科全刺沙蚕属一新种。文中附图并详细地描述了其形态特征,同时与其近似种作了比较。 相似文献
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