Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters—India)
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 prevailing hydrological conditions. The present study showed the significant s...
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| description | 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 prevailing hydrological conditions. The present study showed the significant seasonal variation in water temperature (F = 69.4, P < 0.01), salinity (F = 341.93, P < 0.01), dissolved inorganic phosphorous (F = 17.71, P < 0.01), and silica (F = 898.1, P < 0.01) compared to nitrogen (F = 1.646, P > 0.05). The uneven input of ammonia (3.4-224.8 μM) from upstream (Periyar River) leads to the inconsistency in the N/P ratio (range 6.8-262). A distinct seasonality was observed in Si/N (F = 382.9, P < 0.01) and Si/P (F = 290.3, P < 0.01) ratios compared to the N/P ratio (F = 1.646, P > 0.05). The substantial increase in chlorophyll a (average, 34.8 ± 10 mg m ⁻ ³) and primary production (average, 1,304 ± 694 mg C m ⁻ ³ day ⁻ ¹) indicated the mesotrophic condition of the study area during the premonsoon (PRM) and it was attributed to the large increase in the population of nanoplankton (size < 20 μ ) such as Skeletonema costatum, Thalassiosira subtilis, Nitzschia closterium, and Navicula directa. In contrast, during the post monsoon (PM), low chlorophyll a concentration (average, 9.3 ± 9.2 mg m ⁻ ³) and primary production (average, 124 ± 219 mg C m ⁻ ³ day ⁻ ¹) showed heterotrophic condition. It can be stated that favorable environmental conditions (optimum nutrients and light intensity) prevailing during the PRM have enhanced the abundance of the nanoplankton community in the estuary, whereas during the PM, the light limitation due to high turbidity can reduce the nanoplankton growth and abundance, even though high nutrient level exists. |
| doi_str_mv | 10.1007/s10661-009-1232-y |
| format | Article |
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V ; Balachandran, K. K ; Martin, G. D ; Jyothibabu, R ; Thottathil, Shoji D ; Nair, Maheswari ; Joseph, T ; Kusum, K. K</creator><creatorcontrib>Madhu, N. V ; Balachandran, K. K ; Martin, G. D ; Jyothibabu, R ; Thottathil, Shoji D ; Nair, Maheswari ; Joseph, T ; Kusum, K. K</creatorcontrib><description><![CDATA[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 prevailing hydrological conditions. The present study showed the significant seasonal variation in water temperature (F = 69.4, P < 0.01), salinity (F = 341.93, P < 0.01), dissolved inorganic phosphorous (F = 17.71, P < 0.01), and silica (F = 898.1, P < 0.01) compared to nitrogen (F = 1.646, P > 0.05). The uneven input of ammonia (3.4-224.8 μM) from upstream (Periyar River) leads to the inconsistency in the N/P ratio (range 6.8-262). A distinct seasonality was observed in Si/N (F = 382.9, P < 0.01) and Si/P (F = 290.3, P < 0.01) ratios compared to the N/P ratio (F = 1.646, P > 0.05). The substantial increase in chlorophyll a (average, 34.8 ± 10 mg m ⁻ ³) and primary production (average, 1,304 ± 694 mg C m ⁻ ³ day ⁻ ¹) indicated the mesotrophic condition of the study area during the premonsoon (PRM) and it was attributed to the large increase in the population of nanoplankton (size < 20 μ ) such as Skeletonema costatum, Thalassiosira subtilis, Nitzschia closterium, and Navicula directa. In contrast, during the post monsoon (PM), low chlorophyll a concentration (average, 9.3 ± 9.2 mg m ⁻ ³) and primary production (average, 124 ± 219 mg C m ⁻ ³ day ⁻ ¹) showed heterotrophic condition. It can be stated that favorable environmental conditions (optimum nutrients and light intensity) prevailing during the PRM have enhanced the abundance of the nanoplankton community in the estuary, whereas during the PM, the light limitation due to high turbidity can reduce the nanoplankton growth and abundance, even though high nutrient level exists.]]></description><identifier>ISSN: 0167-6369</identifier><identifier>EISSN: 1573-2959</identifier><identifier>DOI: 10.1007/s10661-009-1232-y</identifier><identifier>PMID: 19936957</identifier><identifier>CODEN: EMASDH</identifier><language>eng</language><publisher>Dordrecht: Dordrecht : Springer Netherlands</publisher><subject>Ammonia ; Animal, plant and microbial ecology ; Applied ecology ; Aquatic ecosystems ; Atmospheric Protection/Air Quality Control/Air Pollution ; Backwaters ; Biogeochemistry ; Biological and medical sciences ; Biomass ; Brackish ; Brackish water ; Chlorophyll ; Chlorophyll - analysis ; Cochin estuary ; Earth and Environmental Science ; Ecology ; Ecotoxicology ; Ecotoxicology, biological effects of pollution ; Environment ; Environmental conditions ; Environmental Management ; Environmental Monitoring ; Estuaries ; Food chains ; Fresh Water - chemistry ; Fundamental and applied biological sciences. Psychology ; India ; Light intensity ; Marine and brackish environment ; Monitoring/Environmental Analysis ; N/P ratio ; Navicula directa ; Nitrogen ; Nitrogen - analysis ; Nitzschia closterium ; Nutrients ; Phosphorus - analysis ; Phytoplankton ; Phytoplankton - classification ; Phytoplankton - growth & development ; Plankton ; Pore size ; Primary production ; Rivers ; Salinity ; Seasonal variations ; Seasons ; Seawater - chemistry ; Silica ; Skeletonema costatum ; Species composition ; Studies ; Thalassiosira subtilis ; Time series ; Tropical Climate ; Turbidity ; Water Pollutants, Chemical - analysis ; Water Pollution, Chemical - statistics & numerical data ; Water quality ; Water temperature ; Weather ; Wind</subject><ispartof>Environmental monitoring and assessment, 2010-11, Vol.170 (1-4), p.287-300</ispartof><rights>Springer Science+Business Media B.V. 2009</rights><rights>2015 INIST-CNRS</rights><rights>Springer Science+Business Media B.V. 2010</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c456t-b868013dd63bdc0651d91c24d3700e47de49e8ac028ba528933a02d8839b42e43</citedby><cites>FETCH-LOGICAL-c456t-b868013dd63bdc0651d91c24d3700e47de49e8ac028ba528933a02d8839b42e43</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10661-009-1232-y$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10661-009-1232-y$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>314,780,784,27924,27925,41488,42557,51319</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=23321532$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/19936957$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Madhu, N. V</creatorcontrib><creatorcontrib>Balachandran, K. K</creatorcontrib><creatorcontrib>Martin, G. D</creatorcontrib><creatorcontrib>Jyothibabu, R</creatorcontrib><creatorcontrib>Thottathil, Shoji D</creatorcontrib><creatorcontrib>Nair, Maheswari</creatorcontrib><creatorcontrib>Joseph, T</creatorcontrib><creatorcontrib>Kusum, K. K</creatorcontrib><title>Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters—India)</title><title>Environmental monitoring and assessment</title><addtitle>Environ Monit Assess</addtitle><addtitle>Environ Monit Assess</addtitle><description><![CDATA[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 prevailing hydrological conditions. The present study showed the significant seasonal variation in water temperature (F = 69.4, P < 0.01), salinity (F = 341.93, P < 0.01), dissolved inorganic phosphorous (F = 17.71, P < 0.01), and silica (F = 898.1, P < 0.01) compared to nitrogen (F = 1.646, P > 0.05). The uneven input of ammonia (3.4-224.8 μM) from upstream (Periyar River) leads to the inconsistency in the N/P ratio (range 6.8-262). A distinct seasonality was observed in Si/N (F = 382.9, P < 0.01) and Si/P (F = 290.3, P < 0.01) ratios compared to the N/P ratio (F = 1.646, P > 0.05). The substantial increase in chlorophyll a (average, 34.8 ± 10 mg m ⁻ ³) and primary production (average, 1,304 ± 694 mg C m ⁻ ³ day ⁻ ¹) indicated the mesotrophic condition of the study area during the premonsoon (PRM) and it was attributed to the large increase in the population of nanoplankton (size < 20 μ ) such as Skeletonema costatum, Thalassiosira subtilis, Nitzschia closterium, and Navicula directa. In contrast, during the post monsoon (PM), low chlorophyll a concentration (average, 9.3 ± 9.2 mg m ⁻ ³) and primary production (average, 124 ± 219 mg C m ⁻ ³ day ⁻ ¹) showed heterotrophic condition. It can be stated that favorable environmental conditions (optimum nutrients and light intensity) prevailing during the PRM have enhanced the abundance of the nanoplankton community in the estuary, whereas during the PM, the light limitation due to high turbidity can reduce the nanoplankton growth and abundance, even though high nutrient level exists.]]></description><subject>Ammonia</subject><subject>Animal, plant and microbial ecology</subject><subject>Applied ecology</subject><subject>Aquatic ecosystems</subject><subject>Atmospheric Protection/Air Quality Control/Air Pollution</subject><subject>Backwaters</subject><subject>Biogeochemistry</subject><subject>Biological and medical sciences</subject><subject>Biomass</subject><subject>Brackish</subject><subject>Brackish water</subject><subject>Chlorophyll</subject><subject>Chlorophyll - analysis</subject><subject>Cochin estuary</subject><subject>Earth and Environmental Science</subject><subject>Ecology</subject><subject>Ecotoxicology</subject><subject>Ecotoxicology, biological effects of pollution</subject><subject>Environment</subject><subject>Environmental conditions</subject><subject>Environmental Management</subject><subject>Environmental Monitoring</subject><subject>Estuaries</subject><subject>Food chains</subject><subject>Fresh Water - chemistry</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>India</subject><subject>Light intensity</subject><subject>Marine and brackish environment</subject><subject>Monitoring/Environmental Analysis</subject><subject>N/P ratio</subject><subject>Navicula directa</subject><subject>Nitrogen</subject><subject>Nitrogen - analysis</subject><subject>Nitzschia closterium</subject><subject>Nutrients</subject><subject>Phosphorus - analysis</subject><subject>Phytoplankton</subject><subject>Phytoplankton - classification</subject><subject>Phytoplankton - growth & development</subject><subject>Plankton</subject><subject>Pore size</subject><subject>Primary production</subject><subject>Rivers</subject><subject>Salinity</subject><subject>Seasonal variations</subject><subject>Seasons</subject><subject>Seawater - chemistry</subject><subject>Silica</subject><subject>Skeletonema costatum</subject><subject>Species composition</subject><subject>Studies</subject><subject>Thalassiosira subtilis</subject><subject>Time series</subject><subject>Tropical Climate</subject><subject>Turbidity</subject><subject>Water Pollutants, Chemical - analysis</subject><subject>Water Pollution, Chemical - statistics & numerical data</subject><subject>Water quality</subject><subject>Water temperature</subject><subject>Weather</subject><subject>Wind</subject><issn>0167-6369</issn><issn>1573-2959</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNp9kctu1TAQhiMEoofCA7ABC6kCFgFf4tsSHXGpVIlF6dpybKfHbRKf2g4ou65Z84Q8CU5zRCUWrCzPfDPzz_xV9RzBdwhC_j4hyBiqIZQ1wgTX84NqgygnNZZUPqw2EDFeM8LkUfUkpStYQN7Ix9URkrJEKd9UP893IeY6uziA7zp63fre5xmEDvzQJQpuJn0X0KMFPifgh33vjc4-jAmEEex3cw77Xo_XefnFYCezJIEfgQY5hn2he-BSnnScwZttMLuSarW5vhuQft_-Oh2t12-fVo863Sf37PAeVxefPn7bfqnPvn4-3X44q01DWa5bwQRExFpGWmsgo8hKZHBjCYfQNdy6RjqhDcSi1RQLSYiG2ApBZNtg15Dj6vXat4i9mYowNfhkXF92cGFKSlDGheQIFvLVP-RVmOJYxClOmYQYU1wgtEImhpSi69Q--qHsqhBUi01qtUmV66vFJjWXmheHxlM7OHtfcfClACcHQKdyvi7q0fj0l8OEYETJMhyvXCqp8dLFe4X_m_5yLep0UPoylsYX57jcFCIhKRKQ_AErtray</recordid><startdate>20101101</startdate><enddate>20101101</enddate><creator>Madhu, N. 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V ; Balachandran, K. K ; Martin, G. D ; Jyothibabu, R ; Thottathil, Shoji D ; Nair, Maheswari ; Joseph, T ; Kusum, K. 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Psychology</topic><topic>India</topic><topic>Light intensity</topic><topic>Marine and brackish environment</topic><topic>Monitoring/Environmental Analysis</topic><topic>N/P ratio</topic><topic>Navicula directa</topic><topic>Nitrogen</topic><topic>Nitrogen - analysis</topic><topic>Nitzschia closterium</topic><topic>Nutrients</topic><topic>Phosphorus - analysis</topic><topic>Phytoplankton</topic><topic>Phytoplankton - classification</topic><topic>Phytoplankton - growth & development</topic><topic>Plankton</topic><topic>Pore size</topic><topic>Primary production</topic><topic>Rivers</topic><topic>Salinity</topic><topic>Seasonal variations</topic><topic>Seasons</topic><topic>Seawater - chemistry</topic><topic>Silica</topic><topic>Skeletonema costatum</topic><topic>Species composition</topic><topic>Studies</topic><topic>Thalassiosira subtilis</topic><topic>Time series</topic><topic>Tropical Climate</topic><topic>Turbidity</topic><topic>Water Pollutants, Chemical - analysis</topic><topic>Water Pollution, Chemical - statistics & numerical data</topic><topic>Water quality</topic><topic>Water temperature</topic><topic>Weather</topic><topic>Wind</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Madhu, N. 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V</au><au>Balachandran, K. K</au><au>Martin, G. D</au><au>Jyothibabu, R</au><au>Thottathil, Shoji D</au><au>Nair, Maheswari</au><au>Joseph, T</au><au>Kusum, K. K</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters—India)</atitle><jtitle>Environmental monitoring and assessment</jtitle><stitle>Environ Monit Assess</stitle><addtitle>Environ Monit Assess</addtitle><date>2010-11-01</date><risdate>2010</risdate><volume>170</volume><issue>1-4</issue><spage>287</spage><epage>300</epage><pages>287-300</pages><issn>0167-6369</issn><eissn>1573-2959</eissn><coden>EMASDH</coden><abstract><![CDATA[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 prevailing hydrological conditions. The present study showed the significant seasonal variation in water temperature (F = 69.4, P < 0.01), salinity (F = 341.93, P < 0.01), dissolved inorganic phosphorous (F = 17.71, P < 0.01), and silica (F = 898.1, P < 0.01) compared to nitrogen (F = 1.646, P > 0.05). The uneven input of ammonia (3.4-224.8 μM) from upstream (Periyar River) leads to the inconsistency in the N/P ratio (range 6.8-262). A distinct seasonality was observed in Si/N (F = 382.9, P < 0.01) and Si/P (F = 290.3, P < 0.01) ratios compared to the N/P ratio (F = 1.646, P > 0.05). The substantial increase in chlorophyll a (average, 34.8 ± 10 mg m ⁻ ³) and primary production (average, 1,304 ± 694 mg C m ⁻ ³ day ⁻ ¹) indicated the mesotrophic condition of the study area during the premonsoon (PRM) and it was attributed to the large increase in the population of nanoplankton (size < 20 μ ) such as Skeletonema costatum, Thalassiosira subtilis, Nitzschia closterium, and Navicula directa. In contrast, during the post monsoon (PM), low chlorophyll a concentration (average, 9.3 ± 9.2 mg m ⁻ ³) and primary production (average, 124 ± 219 mg C m ⁻ ³ day ⁻ ¹) showed heterotrophic condition. It can be stated that favorable environmental conditions (optimum nutrients and light intensity) prevailing during the PRM have enhanced the abundance of the nanoplankton community in the estuary, whereas during the PM, the light limitation due to high turbidity can reduce the nanoplankton growth and abundance, even though high nutrient level exists.]]></abstract><cop>Dordrecht</cop><pub>Dordrecht : Springer Netherlands</pub><pmid>19936957</pmid><doi>10.1007/s10661-009-1232-y</doi><tpages>14</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0167-6369 |
| ispartof | Environmental monitoring and assessment, 2010-11, Vol.170 (1-4), p.287-300 |
| issn | 0167-6369 1573-2959 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_856789710 |
| source | MEDLINE; SpringerLink Journals - AutoHoldings |
| subjects | Ammonia Animal, plant and microbial ecology Applied ecology Aquatic ecosystems Atmospheric Protection/Air Quality Control/Air Pollution Backwaters Biogeochemistry Biological and medical sciences Biomass Brackish Brackish water Chlorophyll Chlorophyll - analysis Cochin estuary Earth and Environmental Science Ecology Ecotoxicology Ecotoxicology, biological effects of pollution Environment Environmental conditions Environmental Management Environmental Monitoring Estuaries Food chains Fresh Water - chemistry Fundamental and applied biological sciences. Psychology India Light intensity Marine and brackish environment Monitoring/Environmental Analysis N/P ratio Navicula directa Nitrogen Nitrogen - analysis Nitzschia closterium Nutrients Phosphorus - analysis Phytoplankton Phytoplankton - classification Phytoplankton - growth & development Plankton Pore size Primary production Rivers Salinity Seasonal variations Seasons Seawater - chemistry Silica Skeletonema costatum Species composition Studies Thalassiosira subtilis Time series Tropical Climate Turbidity Water Pollutants, Chemical - analysis Water Pollution, Chemical - statistics & numerical data Water quality Water temperature Weather Wind |
| title | Short-term variability of water quality and its implications on phytoplankton production in a tropical estuary (Cochin backwaters—India) |
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