Impact of Natural and Anthropogenic Disturbances on the Benthic Ecological Quality of the Coastal Waters of Kochi, Southwest Coast of India

作者: Sura Appala Naidu , Gijjapu Durga Rao , Kanuri Vishnu Vardhan , Munnooru Kumaraswami , Vinjamuri Ranga Rao

DOI: 10.1007/S41742-018-0140-9

关键词: Abundance (ecology)Environmental scienceCommunity structureUpwellingEcologyMonsoonPopulationSpecies richnessBenthic zoneWater column

摘要: This study aimed at assessing the seasonal, spatial macrobenthic community structure and impact of natural, anthropogenic effects on benthic ecological quality coastal waters Kochi, southwest coast India. The exhibited high diversity, species richness during winter monsoon (WM) spring inter-monsoon (SIM) than (SWM) season. factors contributing to such temporal variation are stable water column, downward flux surface production recruitment process WM SIM. occurrence upwelling SWM leads biological production, followed by degradation organic matter in column ultimately leading depleted oxygen levels waters. presence polychaetes as Paraprionospio pinnata, sp., Magelona cincta, Heteromastus Notomastus Lumbrineris Chaetozone sp. Tharyx large numbers demonstrates that they can withstand oxygen-depleted High abundance diversity were noticed mid shelf region inner throughout period. Overall, dominant deposit feeding type M. P. pinnata., contributed ~ 83% carnivores ~ 16% (Goniadae Syllis sp.), whereas only ~ 1% filter feeders omnivores region. low population could be due physical stress, intense fishing activities matter. BENTIX Index (mean ~ 3.5) (mean ~ 4.2) reveals Kochi “moderate” “good” terms quality.

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