Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil)
16 pages, 8 figures, 4 tables
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Elsevier
2016-12
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| Subjects: | Rainfall anomalies, Hydrological process, Zooplankton, Amazon coast, Diversity, |
| Online Access: | http://hdl.handle.net/10261/143404 http://dx.doi.org/10.13039/501100003593 http://dx.doi.org/10.13039/501100002322 |
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dig-icm-es-10261-1434042017-12-18T14:33:19Z Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) Andrade, Marcela Magalhães, André Pereira, Luci C.C. Flores-Montes, Manuel J. Pardal, Emarielle C. Andrade, Thamara P. Costa, Rauquírio M. Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (Brasil) Rainfall anomalies Hydrological process Zooplankton Amazon coast Diversity 16 pages, 8 figures, 4 tables The influences of the 2011 La Niña event on the hydrological patterns and copepod community structure were investigated in a shallow tropical estuary, the Taperaçu, in northern Brazil. Specifically, this study aimed to explore the response of the most dominant copepod species and ecological indices (diversity, evenness and richness) to temporal changes in rainfall regime and water parameters in a tropical meso-macro tidal setting. Zooplankton samples were collected from three sampling sites using a conical plankton net (120 μm mesh), with both water and zooplankton samples analyzed by standard methods. In 2011, the physical, chemical and biological parameters of the water were exacerbated by increased rainfall levels resulting from the La Niña event. This resulted in a reduction in the salinity and an increase in dissolved nutrient concentrations and phytoplankton biomass in the study area. These conditions had a direct effect on the monthly dynamics of copepods as a whole, and in particular of five species, O. oswaldocruzi (169,090 ± 254,609 ind. m− 3; p < 0.0001), P. acutus (301,133 ± 518,065 ind. m− 3; p < 0.05), P. marshi (329,391 ± 563,009 ind. m− 3; p > 0.05), O. hebes (40,888 ± 64,893 ind. m− 3; p < 0.05) and A. tonsa (10,680 ± 13,877 ind. m− 3; p > 0.05), all of which were represented by higher densities in February. An extremely high recruitment rate of copepod nauplii was also observed during this month (3,088,309 ± 5,206,645 ind. m− 3; p < 0.05), with this peak in density thus overlapping that of the adult forms. The anomalous period of rainfall was also reflected in reduced species richness and diversity, which not only affected the structure of the copepod community, but may also have provoked shifts in trophic dynamics at higher levels, such as zooplanktivorous fishes This research was supported by the CNPq (Universal project - 483913/2012-0), CAPES (Ciências do Mar II, 43/2013), FAPESPA (79/2014) and PROPESP/UFPA/FADESP (Programa de Apoio à Publicação Qualificada – PAPQ, 2012/458998) Peer Reviewed 2017-02-03T13:35:20Z 2017-02-03T13:35:20Z 2016-12 2017-02-03T13:35:21Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.jmarsys.2016.07.006 issn: 0924-7963 e-issn: 1879-1573 Journal of Marine Systems 164: 128-143 (2016) http://hdl.handle.net/10261/143404 10.1016/j.jmarsys.2016.07.006 http://dx.doi.org/10.13039/501100003593 http://dx.doi.org/10.13039/501100002322 https://dx.doi.org/10.1016/j.jmarsys.2016.07.006 none Elsevier |
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Rainfall anomalies Hydrological process Zooplankton Amazon coast Diversity Rainfall anomalies Hydrological process Zooplankton Amazon coast Diversity |
| spellingShingle |
Rainfall anomalies Hydrological process Zooplankton Amazon coast Diversity Rainfall anomalies Hydrological process Zooplankton Amazon coast Diversity Andrade, Marcela Magalhães, André Pereira, Luci C.C. Flores-Montes, Manuel J. Pardal, Emarielle C. Andrade, Thamara P. Costa, Rauquírio M. Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) |
| description |
16 pages, 8 figures, 4 tables |
| author2 |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) |
| author_facet |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil) Andrade, Marcela Magalhães, André Pereira, Luci C.C. Flores-Montes, Manuel J. Pardal, Emarielle C. Andrade, Thamara P. Costa, Rauquírio M. |
| format |
artículo |
| topic_facet |
Rainfall anomalies Hydrological process Zooplankton Amazon coast Diversity |
| author |
Andrade, Marcela Magalhães, André Pereira, Luci C.C. Flores-Montes, Manuel J. Pardal, Emarielle C. Andrade, Thamara P. Costa, Rauquírio M. |
| author_sort |
Andrade, Marcela |
| title |
Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) |
| title_short |
Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) |
| title_full |
Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) |
| title_fullStr |
Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) |
| title_full_unstemmed |
Effects of a La Niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (Taperaçu, Northern Brazil) |
| title_sort |
effects of a la niña event on hydrological patterns and copepod community structure in a shallow tropical estuary (taperaçu, northern brazil) |
| publisher |
Elsevier |
| publishDate |
2016-12 |
| url |
http://hdl.handle.net/10261/143404 http://dx.doi.org/10.13039/501100003593 http://dx.doi.org/10.13039/501100002322 |
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