Untitled

Menon, Nandini; Balchand, A. N.; Menon, N. R.

doi:10.1023/a:1004033400255

Cited by 180 publications

(39 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even though station 5 was situated in an adjacent channel, we have considered it to be approximately 1 km north of station 4, as the tide at this point was found to lag behind station 4 [19]. The dominant fresh water flow on 28 th October was indicated by the near zero salinity towards the seaward end of the study area, which however showed saline incursion (6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) at bottom during high tide (Figure 2). During pre monsoon (March 2004), increased tidal activity brought in a vertical mixing, as the salinity increased (18)(19)(20)(21)(22)(23)(24)(25)(26)(27)(28)(29)(30) in the study region and water was warmer by 4°C (28° to 32.2°C) as compared to the previous season (Figure 3).…”

Section: Climatic Conditions and Hydrographymentioning

confidence: 99%

“…The nutrient supply is greater in estuaries that are near densely populated regions, due to the entry of domestic and industrial waste, urban drainage, and agricultural effluents. The increase of nutrient concentrations in estuarine and coastal waters causes several environmental modifications, such as increases in productivity and fishing yields [6,8,9,10]. However, anthropogenic inputs frequently cause excessive eutrophication in the environment, especially where the circulation is restricted, such as in estuaries and coastal regions.…”

Section: Introductionmentioning

confidence: 99%

“…Reclamations over the past several decades have resulted in considerable shrinkage of the Cochin backwaters [13]. The hydraulic barriers constructed to prevent saline incursion into the upstream agricultural fields imposed flow-restrictions and increased sedimentation in the estuary [2,6,14]. The monsoon-derived alluvium accumulates in the estuary during postmonsoon, whereas silting environment prevails during the pre-monsoon [15,16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fresh Water Influence on Nutrient Stoichiometry in a Tropical Estuary, Southwest Coast of India

Martin¹,

Vijay²,

Laluraj³

et al. 2007

Appl Ecol Env Res

View full text Add to dashboard Cite

Abstract. Cochin backwaters, a micro tidal estuary, undergo a characteristic transformation from a riverdominated system during summer monsoon to a tide-dominant system during pre-monsoon season. The present study observes that as the river flow weakens after monsoon, the flushing of the estuary diminishes and the nitrogen and phosphorous loadings through anthropogenic activities (industries) and sediment re-suspension alter the nutrient stoichiometry substantially. The increased tidal activity during pre-monsoon changes the estuary into a vertically mixed, eutrophic and flow-restricted system supporting an enhanced organic production. This implies that monsoon-induced hydrology plays an important role in regulating the nutrients, secondary production and even the migrant fauna of the estuary. The system is delicately poised, as continuous release of pollutants including nutrients into this estuary would suppress fish and shell fish production, where only pollution tolerant species can exist.

show abstract

Section: Climatic Conditions and Hydrographymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fresh Water Influence on Nutrient Stoichiometry in a Tropical Estuary, Southwest Coast of India

Martin¹,

Vijay²,

Laluraj³

et al. 2007

Appl Ecol Env Res

View full text Add to dashboard Cite

show abstract

“…To study the variations in food intake, individual fish were cut open and depending on the state of distension of the stomach were assigned as poorly fed (empty to 1/4 full), moderate ( 1/2 full) and actively fed (3/4 to full).To obtain information on the seasonal diet variations, data were analysed according to seasons based on ecological characters (Menon et al, 2000) and classified as follows -Pre-monsoon (February to May), Monsoon (June to September) and Postmonsoon (October to January).…”

Section: Diet Analysismentioning

confidence: 99%

Stock structure analysis of oil sardine Sardinella longiceps (Valenciennes, 1847) from southeast and southwest coasts of India

Remya¹,

Vivekanandan²,

Sreekanth³

et al. 2015

J.Mar.Biol.Ass.India

View full text Add to dashboard Cite

A total of 200 specimens of oil sardine Sardinella longiceps collected from Kochi in the southwest coast and Chennai in the southeast coast were subjected to truss analysis. A truss network was constructed by interconnecting 10 landmarks to form a total of 21 truss distance variables extracted from the landmarks. The transformed truss measurements were subjected to factor analysis which revealed that there is no separation of the stocks along southeast and southwest coasts. The marginal differences in shape and form are attributed to the ecological differences in the habitats which are evident from differences in length weight relationships and feeding intensity of the population along these two coasts.

show abstract

“…monsoon (June-September), postmonsoon (October-January), and pre-monsoon (February-May). Hydrobiological studies of the estuary (Menon et al 2000) showed that the high flushing during monsoon completely transforms the estuary into a freshwater habitat. Postmonsoon is generally the stabilization period and during pre-monsoon, when the runoff is least, the estuary is predominantly marine in nature.…”

Section: Study Areamentioning

confidence: 99%

Fractionation and bioavailability of phosphorus in a tropical estuary, Southwest India

Renjith

Chandramohanakumar

Joseph

2010

Environ Monit Assess

View full text Add to dashboard Cite

Phosphorus fractionation was employed to find the bioavailability of phosphorus and its seasonal variations in the Panangad region of Cochin estuary, the largest estuarine system in the southwest coast of India. Sequential extraction of the surficial sediments using chelating agents was taken as a tool for this. Phosphate in the water column showed seasonal variations, with high values during the monsoon months, suggesting external runoff. Sediment texture was found to be the main factor influencing the spatial distribution of the geochemical parameters in the study region. Similarly, total phosphorus also showed granulometric dependence and it ranged between 319.54 and 2,938.83 μg/g. Calcium-bound fraction was the main phosphorus pool in the estuary. Significant spatial variations were observed for all bioavailable fractions; iron-bound inorganic phosphorus (5.04-474.24 μg/g), calcium-bound inorganic phosphorus (11.16-826.09 μg/g), and acidsoluble organic phosphorus (22.22-365.86 μg/g). Among the non-bioavailable phosphorus, alkalisoluble organic fraction was the major one (51.92-1,002.45 μg/g). Residual organic phosphorus was K. R. Renjith (B) · N. Chandramohanakumar · M. M. Joseph Department of Chemical Oceanography, School of Marine Sciences, Cochin University of Science and Technology, Kochi 682016, Kerala, India e-mail: renjithaqua@gmail.com comparatively smaller fraction (3.25-14.64% of total). The sandy and muddy stations showed distinct fractional composition and the speciation study could endorse the overall geochemical character. There could be buffering of phosphorus, suggested by the increase in the percentage of bioavailable fractions during the lean premonsoon period, counteracting the decreases in the external loads. Principal component analysis was employed to find the possible processes influencing the speciation of phosphorus in the study region.

show abstract

Untitled

Cited by 180 publications

References 24 publications

Fresh Water Influence on Nutrient Stoichiometry in a Tropical Estuary, Southwest Coast of India

Fresh Water Influence on Nutrient Stoichiometry in a Tropical Estuary, Southwest Coast of India

Stock structure analysis of oil sardine Sardinella longiceps (Valenciennes, 1847) from southeast and southwest coasts of India

Fractionation and bioavailability of phosphorus in a tropical estuary, Southwest India

Contact Info

Product

Resources

About