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Balachandran KK Jayalakshmy KV Laluraj CM Nair M Joseph T Sheeba P 《Environmental monitoring and assessment》2008,139(1-3):217-226
The interaction effects of abiotic processes in the production of phytoplankton in a coastal marine region off Cochin are
evaluated using multiple regression models. The study shows that chlorophyll production is not limited by nutrients, but their
physiological regulations (responses to nutrients, pH, temperature and salinity) are mainly responsible for the increased
biological production. The model explaining 77% of variability for chlorophyll a production is indicative of preconditioning of the coastal waters. The phytoplankton production is found to be sensitive
to the environment, which varies seasonally. Further, the study suggests that supply of organic matter and grazing of zooplankton
(not included) would improve the model efficiency. Despite this, the good agreement in the computed and measured chlorophyll
a values shows that step-up multiple regression model is a useful tool to understand the influence of environmental variables
on the production of phytoplankton in these coastal waters. 相似文献
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Laluraj CM Kesavadas V Balachandran KK Gerson VJ Martin GD Shaiju P Revichandran C Joseph T Nair M 《Environmental monitoring and assessment》2007,125(1-3):41-45
Water quality in the Cochin Estuary, southwest coast of India during the tsunami attack was assessed and compared with the
pre and post tsunami characteristics. From the results obtained, it is evident that a drastic change in hydrography has been
inflicted by the energy transferred through the tsunami, which disturbed the entire estuarine embayment. However, the post
tsunami water quality showed normal levels indicating that the region has recovered from the tsunami impacts. 相似文献
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Kumar PK 《Environmental monitoring and assessment》2006,123(1-3):333-344
This study presents the results of the impact assessment analysis of the coastal zones of Cochin along the southwest coast of India. The climatological cycle of sea level derived for the region for the period 1939–2003 has shown a range of about 17 cm. From the results obtained on the coastal sedimentary environments, it is found that climate-induced sea level rise scenarios will bring profound effects. It is also revealed that the mean beach slope and relief play a vital role in land loss of the region. The local relief of coastal zone will decrease as sea level rises, thus increasing the percentage of land above mean sea level subjected to episodic inundations. Results of the yearly probability of damages indicated the urgency to upgrade the existing designs of coastal protection structures. A brief characterisation of the issues on infrastructure and uncertainties in policy planning also are attempted. 相似文献
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