Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean)
In estuaries, detrital (i.e., non-living) organic matter (OM) contributes significantly to the particulate organic matter (POM) pool and we hypothesize that it may be a major source of estuarine zooplankton diet. To test this hypothesis, the isotopic composition of carbon (d13C) and nitrogen (d15N)...
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| Format: | Article |
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PAGEPress Publications
2018-07-01
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| Series: | Advances in Oceanography and Limnology |
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| Online Access: | https://pagepressjournals.org/index.php/aiol/article/view/7266 |
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| author | Jayati Mukherjee Sura A. Naidu V.V.S.S. Sarma Tuhin Ghosh |
| author_facet | Jayati Mukherjee Sura A. Naidu V.V.S.S. Sarma Tuhin Ghosh |
| author_sort | Jayati Mukherjee |
| collection | DOAJ |
| description | In estuaries, detrital (i.e., non-living) organic matter (OM) contributes significantly to the particulate organic matter (POM) pool and we hypothesize that it may be a major source of estuarine zooplankton diet. To test this hypothesis, the isotopic composition of carbon (d13C) and nitrogen (d15N) of phytoplankton, zooplankton, and POM was assessed in the Godavari estuary (Bay of Bengal, Indian Ocean) during wet (November) and dry periods (January). As a result of higher riverine discharge, POM concentrations and values of the C/Chl-a ratio during the wet period were higher than those measured during the dry one. Relatively lower δ13CPOM values were observed during wet than dry period and contrasting to that was found for δ15NPOM. Detritus from fresh water algae and C3 plants contributed significantly to the POM pool during the wet and dry period, respectively. Based on isotopic mixing model, detrital OM and phytoplankton mostly characterized the POM pools during the wet and dry periods, respectively. Accordingly, our results suggest also that the zooplankton diet was mostly supported by detrital OM during the wet period and by both phytoplankton and detrital OM during the dry one. The zooplankton trophic level (TL, 2.7) during the wet period was relatively higher than that (1.9) during the dry one, suggesting a relative higher preference for detritus than phytoplankton during the wet period. The results of this study allowed us confirming that detrital OM can significantly support zooplankton production in the Godavari estuary. |
| first_indexed | 2024-04-13T01:56:46Z |
| format | Article |
| id | doaj.art-08d574487d634335bc18501add992195 |
| institution | Directory Open Access Journal |
| issn | 1947-5721 1947-573X |
| language | English |
| last_indexed | 2024-04-13T01:56:46Z |
| publishDate | 2018-07-01 |
| publisher | PAGEPress Publications |
| record_format | Article |
| series | Advances in Oceanography and Limnology |
| spelling | doaj.art-08d574487d634335bc18501add9921952022-12-22T03:07:44ZengPAGEPress PublicationsAdvances in Oceanography and Limnology1947-57211947-573X2018-07-019110.4081/aiol.2018.7266Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean)Jayati Mukherjee0Sura A. Naidu1V.V.S.S. Sarma2Tuhin Ghosh3CSIR-National Institute of OceanographyCSIR-National Institute of OceanographyCSIR-National Institute of OceanographyJadavpur UniversityIn estuaries, detrital (i.e., non-living) organic matter (OM) contributes significantly to the particulate organic matter (POM) pool and we hypothesize that it may be a major source of estuarine zooplankton diet. To test this hypothesis, the isotopic composition of carbon (d13C) and nitrogen (d15N) of phytoplankton, zooplankton, and POM was assessed in the Godavari estuary (Bay of Bengal, Indian Ocean) during wet (November) and dry periods (January). As a result of higher riverine discharge, POM concentrations and values of the C/Chl-a ratio during the wet period were higher than those measured during the dry one. Relatively lower δ13CPOM values were observed during wet than dry period and contrasting to that was found for δ15NPOM. Detritus from fresh water algae and C3 plants contributed significantly to the POM pool during the wet and dry period, respectively. Based on isotopic mixing model, detrital OM and phytoplankton mostly characterized the POM pools during the wet and dry periods, respectively. Accordingly, our results suggest also that the zooplankton diet was mostly supported by detrital OM during the wet period and by both phytoplankton and detrital OM during the dry one. The zooplankton trophic level (TL, 2.7) during the wet period was relatively higher than that (1.9) during the dry one, suggesting a relative higher preference for detritus than phytoplankton during the wet period. The results of this study allowed us confirming that detrital OM can significantly support zooplankton production in the Godavari estuary.https://pagepressjournals.org/index.php/aiol/article/view/7266Phytoplanktonzooplanktondetritusstable isotopesriver dischargeGodavari estuary. |
| spellingShingle | Jayati Mukherjee Sura A. Naidu V.V.S.S. Sarma Tuhin Ghosh Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean) Advances in Oceanography and Limnology Phytoplankton zooplankton detritus stable isotopes river discharge Godavari estuary. |
| title | Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean) |
| title_full | Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean) |
| title_fullStr | Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean) |
| title_full_unstemmed | Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean) |
| title_short | Influence of river discharge on zooplankton diet in the Godavari estuary (Bay of Bengal, Indian Ocean) |
| title_sort | influence of river discharge on zooplankton diet in the godavari estuary bay of bengal indian ocean |
| topic | Phytoplankton zooplankton detritus stable isotopes river discharge Godavari estuary. |
| url | https://pagepressjournals.org/index.php/aiol/article/view/7266 |
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