Seasonal variations in abundance, biomass and grazing rates of microzooplankton in a tropical monsoonal estuary
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| 024 | 7 | 0 | |a 10.1007/s10872-015-0292-6 |2 doi |
| 035 | |a (NATIONALLICENCE)springer-10.1007/s10872-015-0292-6 | ||
| 245 | 0 | 0 | |a Seasonal variations in abundance, biomass and grazing rates of microzooplankton in a tropical monsoonal estuary |h [Elektronische Daten] |c [Mangesh Gauns, Sunita Mochemadkar, Shrikant Patil, Anil Pratihary, S. Naqvi, M. Madhupratap] |
| 520 | 3 | |a Seasonal abundance, composition and grazing rates of microzooplankton (20-200µm) in the Zuari estuary were investigated to evaluate their importance in food web dynamics of a tropical monsoonal estuary. Average abundances of microzooplankton (organisms × 104 l−1) during the three seasons were 0.44 (southwest monsoon), 1.13 (post-monsoon) and 0.96 (pre-monsoon). Protozoan (ciliates, heterotrophic dinoflagellates and sarcodines) accounted for most (96%) of the microzooplankton community, with micrometazoan (nauplii and copepodid stages of copepods, fish eggs, etc.). being far less abundant. Among protozoans, ciliates (loricates and aloricates) were most numerous (69% of the total microzooplankton). Statistically significant (p<0.001) co-variations of microzooplankton with other biological parameters such as chlorophyll a and bacterial biomass were observed. Salinity influenced microzooplankton distribution, with an optimum range of 15-20. Microzooplankton formed a large organic carbon pool, accounting for 24-40% of the total carbon in the living matter. Seasonally averaged microzooplankton biomasses were 22.3, 36.1 and 24.6mmol C m−3, respectively, during the southwest monsoon, post-monsoon and pre-monsoon periods, and were largely supported by non-living particulate carbon (detritus) particularly during the non-monsoon seasons. Experimental studies revealed significant microzooplankton grazing on phytoplankton standing stock, mainly (>60%) by the pico and nano fraction (<20µm) for most of the year. Phytoplankton growth rates (day−1) ranged between 0.69 and 1.24. Microzooplankton grazing was estimated to consume 30-82% of the phytoplankton standing stock, and 58-97% of the daily primary production. Results of the present study highlight the role of the microzooplankton as an important consumer of phytoplankton production. | |
| 540 | |a The Oceanographic Society of Japan and Springer Japan, 2015 | ||
| 690 | 7 | |a Microzooplankton |2 nationallicence | |
| 690 | 7 | |a Bacteria |2 nationallicence | |
| 690 | 7 | |a Phytoplankton |2 nationallicence | |
| 690 | 7 | |a Mesozooplankton |2 nationallicence | |
| 690 | 7 | |a Food web |2 nationallicence | |
| 690 | 7 | |a Zuari estuary |2 nationallicence | |
| 700 | 1 | |a Gauns |D Mangesh |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | |
| 700 | 1 | |a Mochemadkar |D Sunita |u Directorate of Fisheries, Govt. of Goa, Dayanand Bandokar Marg, Panaji, Goa, India |4 aut | |
| 700 | 1 | |a Patil |D Shrikant |u Stazione Zoologica Anton Dohrn, Naples, Italy |4 aut | |
| 700 | 1 | |a Pratihary |D Anil |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | |
| 700 | 1 | |a Naqvi |D S. |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | |
| 700 | 1 | |a Madhupratap |D M. |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | |
| 773 | 0 | |t Journal of Oceanography |d Springer Japan |g 71/4(2015-08-01), 345-359 |x 0916-8370 |q 71:4<345 |1 2015 |2 71 |o 10872 | |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s10872-015-0292-6 |q text/html |z Onlinezugriff via DOI |
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 900 | 7 | |a Metadata rights reserved |b Springer special CC-BY-NC licence |2 nationallicence | |
| 908 | |D 1 |a research-article |2 jats | ||
| 949 | |B NATIONALLICENCE |F NATIONALLICENCE |b NL-springer | ||
| 950 | |B NATIONALLICENCE |P 856 |E 40 |u https://doi.org/10.1007/s10872-015-0292-6 |q text/html |z Onlinezugriff via DOI | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Gauns |D Mangesh |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Mochemadkar |D Sunita |u Directorate of Fisheries, Govt. of Goa, Dayanand Bandokar Marg, Panaji, Goa, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Patil |D Shrikant |u Stazione Zoologica Anton Dohrn, Naples, Italy |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Pratihary |D Anil |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Naqvi |D S. |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 700 |E 1- |a Madhupratap |D M. |u CSIR-National Institute of Oceanography, 403 004, Dona Paula, Goa, India |4 aut | ||
| 950 | |B NATIONALLICENCE |P 773 |E 0- |t Journal of Oceanography |d Springer Japan |g 71/4(2015-08-01), 345-359 |x 0916-8370 |q 71:4<345 |1 2015 |2 71 |o 10872 | ||