Browsing by Author "Karnan, C."
Now showing items 1-20 of 21
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Biophysical implications of the freshwater influx over small spatial scale in the coastal waters along the southwest coast of India during the Southwest Monsoon
Santhikrishnan, S.; Jyothibabu, R.; Albin, K.J.; Alok, K.T.; Karnan, C.; Arunpandi, N.; Camey, M.F.; Gireeshkumar, T.R. (Elsevier BV, 2021)This study in the coastal waters off Kochi along the southwest coast of India during the Southwest Monsoon (SWM) presents the biophysical implications of freshwater influx over a small spatial scale. Field sampling was ... -
Discriminating the biophysical impacts of coastal upwelling and mud banks along the southwest coast of India
Karnan, C.; Jyothibabu, R.; Arunpandi, N.; Jagadeesan, L.; Muraleedharan, K.R.; Pratihary, A.K.; Balachandran, K.K.; Naqvi, S.W.A. (Elsevier, 2017)Coastal upwelling and mud banks are two oceanographic processes concurrently operating along certain stretches of the southwest (Kerala) coast of India during the Southwest Monsoon period (June-September), facilitating ... -
Dominance of coastal upwelling over Mud Bank in shaping the mesozooplankton along the southwest coast of India during the Southwest Monsoon
Jagadeesan, L.; Jyothibabu, R.; Arunpandi, N.; Karnan, C.; Balachandran, K.K. (Pergamon, 2017)Mud Banks are littoral zones along the Kerala (southwest) coast of India with increased suspended sediments during the Southwest Monsoon (SWM), which facilitate remarkable damping of incident waves creating a localized ... -
Ecological indications of copepods to oxygen-deficient near-shore waters
Jyothibabu, R.; Jagadeesan, L.; Karnan, C.; Arunpandi, N.; Pandiyarajan, R.S.; Balachandran, K.. (Elsevier, 2018)Dissolved oxygen deficiency and its impacts on marine organisms is an important research topic world over. In this study, we utilized the advantage of a shallow seasonal hypoxic zone occurring along the Southwest Coast of ... -
Ecological responses of autotrophic microplankton to the eutrophication of the coastal upwelling along the Southwest coast of India
Jyothibabu, R.; Karnan, C.; Jagadeesan, L.; Arunpandi, N.; Parthasarathi, N.; Albin, K.J. (Springer, 2021)The primary ecological effects of the eutrophication of upwelling in the nearshore waters are the triggering and sustenance of phytoplankton (diatom) blooms. Here, we present the changes in the morphological characteristics ... -
Environmental and human facets of the waterweed proliferation in a vast tropical Ramsar wetland - Vembanad lake system
Jyothibabu, R.; Sarath, S.; Balachandran, K.K.; SanthiKrishnan, S.; Karnan, C.; Arunpandi, N.; Alok, K.T.; Ramanamurty, M.V. (Springer, 2023)The Vembanad Lake and its associated low-lying areas and network of canals (hereafter VBL) form the major part of India’s second-largest Ramsar wetland (1512 km2) located in Kerala State along India’s southwest coast. The ... -
Fragilariopsis sp. bloom causes yellowish-brown waters off Alappuzha, south-central Kerala coast, India, during the mud bank-upwelling phase
Jyothibabu, R.; Arunpandi, N.; Karnan, C.; Jagadeesan, L.; Manojkumar, T.M.; Balachandran, K.K.; Naqvi, S.W.A. (Current Science Association & Indian Academy of Sciences, 2018)Mud banks (Chakara) of Kerala are calm coastal waters that form in several isolated stretches along the coast usually during the southwest monsoon (SWM) period (June-September). They are characterized by the damping of ... -
Impact of lockdown on the environmental quality along the Indian coast and a tropical estuary
Karnan, C.; Sandhya, S.V.; Gauns, M.; Pratihary, A.K. (Elsevier, 2021)The COVID-19 lockdown significantly improved the global environmental quality by restricted anthropogenic activities. We aimed to understand the response of Indian coastal environmental quality and an estuarine (Zuari ... -
Implications of micro-plankton and micro-detritus on the food web in the largest monsoonal estuary along the west coast of India
Karnan, C.; Jyothibabu, R.; Arunpandi, N.; Albin, K.J.; Parthasarathi, S. (Elsevier Ltd, 2021)This study presents how seasonal hydrographical changes affect the size structure of the micro-plankton community and thereby the availability of micro-detritus in the Kochi backwaters (KBW). Advanced quantification of ... -
Microplankton size structure induced by a warm-core eddy in the western Bay of Bengal: Role of Trichodesmium abundance
Karnan, C.; Jyothibabu, R.; Arunpandi, N.; Pandiyarajan, R.S.; Parthasarathi, Singaram; Shoba, Santhikrishnan (Elsevier, 2021)Mesoscale warm-core eddies are common in the Bay of Bengal (BoB), and this study in the western BoB during Pre-Southwest Monsoon (April 2015) presents how a prolonged warm-core core eddy could modify the microplankton ... -
Mud Banks along the southwest coast of India are not too muddy for plankton
Jyothibabu, R.; Balachandran, K.K.; Jagadeesan, L.; Karnan, C.; Arunpandi, N.; Naqvi, S.W.A.; Pandiyarajan, R.S. (2018)Considering Alappuzha Mud Bank in the southern Kerala coast as a typical case of biologically productive Mud Banks that form along the southwest coast of India during the Southwest Monsoon (June - September), the present ... -
Noctiluca and copepods grazing on the phytoplankton community in a nutrient-enriched coastal environment along the southwest coast of India
Arunpandi, N.; Jyothibabu, R.; Jagadeesan, L.; Gireeshkumar, T.R.; Karnan, C.; Naqvi, S.W.A. (Springer, 2017)The relative grazing impact of Noctiluca scintillans (hereafter referred only Noctiluca) and copepods (Acrocalanus gracilis, Paracalanus parvus, Acartia danae and Oithona similis) on the phytoplankton community in an ... -
On the accuracy of assessing copepod size and biovolume using FlowCAM and traditional microscopy
Karnan, C.; Jyothibabu, R.; ManojKumar, T.M.; Jagadeesan, L.; Arunpandi, N. (CSIR, India, 2017)In this paper, based on the biovolume estimation of different genera of copepods, we present the fact that only the Area-based Diameter (ABD) algorithm of FlowCAM has the efficiency to measure the bio-volume of copepods ... -
Response of microplankton size structure to summer stratification, freshwater influx and coastal upwelling in the Southeastern Arabian Sea
Karnan, C.; Jyothibabu, R.; Arunpandi, N.; Albin, K.J.; Parthasarathi, S.; SanthiKrishnan, S. (2020)A year-round FlowCAM-based study of micro-plankton (20-200 μm) size structure was conducted in several locations along a cross-shore transect off Kochi in the near-shore waters of the southeastern Arabian Sea (SEAS; along ... -
Response of phytoplankton to heavy cloud cover and turbidity in the northern Bay of Bengal
Jyothibabu, R.; Arunpandi, N.; Jagadeesan, L.; Karnan, C.; Lallu, K.R.; Vinayachandran, P.N. (Nature Publishing Group, 2018)An interesting physiological response of phytoplankton to large fluctuations in underwater photosynthetically active radiation (PAR) levels in the northern Bay of Bengal has been presented here. This study is primarily ... -
Seasonality in autotrophic mesoplankton in a coastal upwelling-mud bank environment along the southwest coast of India and its ecological implications
Karnan, C.; Jyothibabu, R.; ManojKumar, T.M.; Balachandran, K.K.; Arunpandi, N.; Jagadeesan, L. (Elsevier, 2017)Mesoplankton refers to both autotrophic and heterotrophic�plankton�with a body size between 200 � 20,000��m. Here, we applied a FlowCAM to identify the�autotrophs�present in the mesoplankton size class in a�coastal ... -
Significantly dominant warm-core eddies: An ecological indicator of the basin-scale low biological production in the Bay of Bengal
Jyothibabu, R.; Karnan, C.; Arunpandi, N.; SanthiKrishnan, S.; Balachandran, K.K.; Sahu, K.C. (Elsevier B.V., 2021)This paper introduces the cumulative impact of cyclonic (cold-core) and anticyclonic (warm-core) eddies on the distribution of phytoplankton biomass in the Bay of Bengal (BoB). Estimations of the ocean surface eddy features ... -
Summer monsoon onset-induced changes of autotrophic pico- and nanoplankton in the largest monsoonal estuary along the west coast of India
Mohan, A.P.; Jyothibabu, R.; Jagadeesan, L.; Lallu, K.R.; Karnan, C. (Springer, 2016)This study presents the response of autotrophic pico- and nanoplankton to southwest monsoon-associated hydrographical transformations in the Cochin backwaters (CBW), the largest monsoonal estuary along the west coast of ... -
Trichodesmium blooms and warm-core ocean surface features in the Arabian Sea and the Bay of Bengal
Jyothibabu, R.; Karnan, C.; Jagadeesan, L.; Arunpandi, N.; Pandiarajan, R.S.; Muraleedharan, K.R.; Balachandran, K.K. (Elsevier, 2017)Trichodesmium is a bloom-forming, diazotrophic, non-heterocystous cyanobacteria widely distributed in the warmer oceans, and their bloom is considered a �biological indication� of stratification and nitrogen limitation in ... -
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 ...