Browsing by Author "Madhu, N.V."
Now showing items 41-55 of 55
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Response of coastal phytoplankton to upwelling induced hydrological changes in the Alappuzha mud bank region, southwest coast of India
Madhu, N.V.; Anil, P.; Meenu, P.; Gireeshkumar, T.R.; Muraleedharan, K.R.; Rehitha, T.V.; Dayana, M.; Vishal, C.R. (Elsevier, 2021)The response of phytoplankton community to the co-existing events of coastal upwelling and mud banks in the nearshore waters of Alappuzha (15 m depth), located in the southwest coast of India from April to November 2016, ... -
Seasonal dynamics of the copepod community in a tropical monsoonal estuary and the role of sex ratio in their abundance pattern
Vineetha, G.; Madhu, N.V.; Kusum, K.K.; Sooria, P.M. (Springer, 2015)As salinity is considered the prime “ecological master factor” governing the zooplankton distribution and abundance in estuaries, a spatio-temporal interactive approach was followed to assess whether the responses of the ... -
Seasonal variation of microzooplankton (20-200 mu m) and its possible implications on the vertical carbon flux in the western Bay of Bengal
Jyothibabu, R.; Madhu, N.V.; Maheswaran, P.A.; Jayalakshmy, K.V.; Nair, K.K.C.; Achuthankutty, C.T. (Elsevier, 2008)Stratification (throughout the year) and low solar radiation (during monsoon periods) have caused low chlorophyll a and primary production (seasonal average 13-18 mg m sup(-2) and 242-265 mg C m sup(-2) d sup(-1), respectively) ... -
Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters - India)
Madhu, N.V.; Balachandran, K.K.; Martin, G.D.; Jyothibabu, R.; Thottathil, S.D.; Nair, M.; Joseph, T.; Kusum, K.K. (Springer, 2010)Changes in the phytoplankton biomass (chlorophyll a), production rate, and species composition were studied over two seasons using the time series measurements in the northern limb of the Cochin estuary in relation to the ... -
Spatio-temporal variability in macrobenthic communities and trophic structure of a tropical estuary and its adjacent coastal waters
Rehitha, T.V.; Madhu, N.V.; Vineetha, G.; Vipindas, P.V.; Resmi, P.; Revichandran, C. (2019)Spatio-temporal distribution of the macrobenthic community (> 500 ?m) and the trophic ecology of polychaetes were studied for a year in the Cochin estuary (CE) and its adjacent coastal waters. A profound influence of the ... -
Surge in the jellyfish population of a tropical monsoonal estuary: A boon or bane to its plankton community dynamics?
Vineetha, G.; Kripa, V.; Kusum, K.K.; Madhu, N.V.; Anil, P.; Nair, M.S.V. (Elsevier, 2022)Recurrent jellyfish blooms and their impacts on ecosystem deliverables of coastal habitats have become a major ecological concern.In view of this, repercussions of a surge in the jellyfish population on the plankton community ... -
The response of microzooplankton (20-200 mu m) to coastal upwelling and summer stratification in the southeastern
Jyothibabu, R.; Devi, C.R.A.; Madhu, N.V.; Sabu, P.; Jayalakshmy, K.V.; Jacob, J.; Habeebrehman, H.; Prabhakaran, M.P.; Balasubramanian, T.; Nair, K.K.C. (Elsevier, 2008)During the late summer monsoon (LSM), coastal upwelling and river runoff have increased the nutrient concentration in the inshore region of the southeastern Arabian Sea. This has resulted in elevated chlorophyll-a (av. 40 ... -
The September 2004 stench off the southern Malabar coast - A consequence of holococcolithophore bloom
Ramaiah, N.; Paul, J.T.; Fernandes, V.; Raveendran, T.V.; Raveendran, O.; Sundar, D.; Revichandran, C.; Shenoy, D.M.; Gauns, M.; Kurian, S.; Gerson, V.J.; Shoji, D.T.; Madhu, N.V.; SreeKumar, S.; LokaBharathi, P.A.; Shetye, S.R. (Indian Academy of Sciences, 2005)During the third week of September 2004, particularly on 16th and 17th, an unusual and strong stench was reported from the coast at Kollam and Vizhinjam in Kerala (India). Local dailies reported that over 200 children, ... -
Tidal influence on the diel vertical migration pattern of zooplankton in a tropical monsoonal Estuary
Vineetha, G.; Jyothibabu, R.; Madhu, N.V.; Kusum, K.K.; Sooria, P.M.; Shivaprasad, A.; Reny, P.D.; Deepak, M.P. (Springer, 2015)Monsoonal estuaries, located along the coastline of the Indian subcontinent, differ from other estuaries by their time dependence on the salinity characteristics. Effective sustenance and retention of the mesozooplankton ... -
Variability in the phytoplankton community of Kavaratti reef ecosystem (northern Indian Ocean) during peak and waning periods of El Ni�o 2016
Kusum, K.K.; Vineetha, G.; Madhu, N.V.; Anil, P.; Dayana, M.; Shihab, B.K.; Muhsin, A.I.; Riyas, C.; Raveendran, T.V. (Springer, 2017)El Ni�o, an interannual climate event characterized by elevated oceanic temperature, is a prime threat for coral reef ecosystems worldwide, owing to their thermal threshold sensitivity. Phytoplankton plays a crucial role ... -
Vertical distribution of mesozooplankton biomass in relation to oxygen minimum layer in the Andaman Sea during February 1999
Madhu, N.V.; Jyothibabu, R.; Ramu, K.; Sunil, V.; Gopalakrishnan, T.C.; Nair, K.K.C. (CMFRI, 2003)Mesozooplankton biomass in the upper 1000m of the Andaman Sea was studied as part of the Marine Research-Living Resources (MR-LR) assessment programme during February 1999 providing baseline information on stratification ... -
Viral-Induced Mortality of Prokaryotes in a Tropical Monsoonal Estuary
Jasna, V.; Parvathi, A.; Ram, A.S.P.; Balachandran, K.K.; Madhu, N.V.; Nair, M.; Jyothibabu, R.; Jayalakshmy, K.V.; Revichandran, C.; Sime-Ngando, T. (Frontiers, 2017)Viruses are recognized as the most abundant and dynamic biological entities in the marine and estuarine environment. However, studies on the dynamics and activity of viruses in transient estuarine systems are limited. This ... -
Waning of plankton food web in the upstream region of the Cochin backwaters during the southwest monsoon
Jyothibabu, R.; Madhu, N.V.; Martin, G.D.; Aneesh, C.; Sooria, P.M.; Vineetha, G. (CSIR-NISCAIR, 2015)Heterotrophic bacteria (0.2-2 µm), pico-phytoplankton (0.2-2 µm), nano-phytoplankton (2-20 µm), micro-phytoplankton (>20 µm), heterotrophic nanoflagellates (2-20 µm), and micro-zooplankton (20- 200 µm) present in the Cochin ... -
Why do satellite imageries show exceptionally high chlorophyll in the Gulf of mannar and the Palk bay during the norteast monsoon?.
Jyothibabu, R.; Madhu, N.V.; Jagadeesan, L.; Anjusha, A.; Mohan, A.P.; Ullas, N.; Sudheesh, K.; Karnan, C. (Springer, 2014)The Gulf of Mannar (GoM) and the Palk Bay (PB) are two least studied marine environments located between India and Sri Lanka. Exceptionally high chlorophyll a concentration in the GoM and the PB during the Northeast Monsoon ... -
Zooplankton
Jyothibabu, R.; Madhu, N.V. (National Institute of Oceanography, India, 2007)A review on some important aspects of zooplankton community in the Mandovi and Zuari estuaries, Goa, India is presented. Both these estuaries have more or less similar zooplankton fauna with nearly 20 different taxonomic ...