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首页> 外文期刊>Iranian Journal of Fisheries Sciences >Mangrove vegetation and community structure of brachyuran crabs as ecological indicators of Pondicherry coast, South east coast of India
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Mangrove vegetation and community structure of brachyuran crabs as ecological indicators of Pondicherry coast, South east coast of India

机译：Brachyuran Crabs的红树林植被和群落结构作为印度东南海岸的本地河岸生态指标

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摘要

Baseline ecological studies of Pondicherry mangroves are important for monitoring, management and conservation of mangrove ecosystems. A brachyuran crab faunal assemblage at four stations of Pondicherry mangroves is described and monthly samplings were made during September 2008 – August 2009. Totally 22 species of brachyuran crabs belonging to 12 genera and 5 families were recorded crabs belonging to the family Portunidae and Ocipodidae are most dominant group represented by total of 16 species. Six species considered are as a commercially important and out of which, on three species Scylla serrata , Thalamitta crenata and Portunus sanguinolentus are catch large quantities from stations 1 and 2. Portunus pelagicus , P. sanguinolentus and T. crenata were totally absent in stations 3 and 4. Population densities of brachyuran fauna ranged from 29 -71 ind. msup2/sup, the diversity ranged from 0.96 -2.18 bit. ind sup-1/sup, the richness varied from 0.42 -0.74, and the evenness varied from 0.41 -.072. Maximum diversity values were recorded during post monsoon. The crab community recorded was analyzed by univariate and multivariate statistical techniques. Crab community structure was correlated with vegetation structure, and environmental factors were positively correlated with surface water pH, salinity, tree dominance, tree diversity and tidal inundation and negatively correlated with sulphide, organic matter, senescent leaves and decaying leaves, suggesting that the mangrove vegetation is important to the crab fauna as a habitat and food supply.
机译：Pondicherry Mangroves的基线生态学研究对于红树林生态系统的监测，管理和保护是重要的。在Pondicherry Mangroves的四个站的Brachyuran螃蟹鳄鱼群体被描述，并在2008年9月 - 2009年8月进行了每月抽样。完全22种属于12属和5个家庭的Brachyuran螃蟹被记录为Portunidae和Ocipodidae的螃蟹。最多主导团总数为16种。考虑了六种物种作为商业上重要的，其中，在三种物种Scylla Serrata，Thalamitta Crenata和Portunus sanguinolentus都是从站1和2. PortunusPelagicus，P. sanguinolentus和T. Crenata和T. Crenata在站3中缺席的大量4. Brachyuran Fauna的人口密度从29-71 Ind。 m 2 ，多样性范围为0.96 -2.18位。 IND -1 ，丰富度从0.42 -0.74变化，均匀度从0.41 -.072变化。在季风期间记录最大分集值。记录的螃蟹社区被单变量和多元统计技术分析。螃蟹群落结构与植被结构相关，环境因素与地表水pH，盐度，树优势，树分多样性和潮汐淹没以及与硫化物，有机物，衰老叶和腐烂的叶子负相关，表明红树林植被对螃蟹动物作为栖息地和食品供应非常重要。

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