Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean
Temporal fluctuations in appendicularian species composition, abundance, size structure, and biomass, and their relationships with physical and biological factors were studied biweekly to monthly from March 2000 to April 2001 at a coastal station (38°28'S, 57°41'W) off Argentina, SW Atlant...
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todo:paper_00074977_v82_n2_p171_Capitanio2023-10-03T14:05:49Z Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean Capitanio, F.L. Curelovich, J. Tresguerres, M. Negri, R.M. Viñas, M.D. Esnal, G.B. abundance biomass chlorophyll a community composition hypothesis testing metazoan seasonality secondary production size structure temporal variation zooplankton Argentina Atlantic Ocean Atlantic Ocean (Southwest) South America Animalia Appendicularia (class) Appendicularia sicula Copepoda Fritillaria (appendicularian) Fritillaria borealis Oikopleura dioica Oikopleura fusiformis Temporal fluctuations in appendicularian species composition, abundance, size structure, and biomass, and their relationships with physical and biological factors were studied biweekly to monthly from March 2000 to April 2001 at a coastal station (38°28'S, 57°41'W) off Argentina, SW Atlantic Ocean. The highest abundances and biomasses were recorded during spring-summer with a maximum in early January (4369 ind m-3 = 2321 μg C m -3). Secondary production was 76 mg C m-3 yr-1 and house production was 123 mg C m-3yr-1 Abundance of Fritillaria borealis Lohmann, 1896 was related to temperature changes, being more abundant during fall-winter; however, we measured only low biomasses. Appendicularia sicula Fol, 1874 and Oikopleura fusiformis Fol, 1872 appeared during summer and autumn, but their abundances were low. Oikopleura dioica Fol, 1872 was present all year and was the dominant species. When chlorophyll a concentration was high, and copepod abundance was low (fall-winter period), both juvenile and adult O. dioica were abundant in all of the samples. During the spring-summer period (low chlorophyll a concentration) a high predominance of adult animals (up to 1400 μm TL) was observed, suggesting a strong predation by copepods upon O. dioica eggs and juveniles. However, further field evidence is needed to test this hypothesis. © 2008 Rosenstiel School of Marine and Atmospheric Science of the University of Miami. Fil:Capitanio, F.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Curelovich, J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Tresguerres, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Esnal, G.B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00074977_v82_n2_p171_Capitanio |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
abundance biomass chlorophyll a community composition hypothesis testing metazoan seasonality secondary production size structure temporal variation zooplankton Argentina Atlantic Ocean Atlantic Ocean (Southwest) South America Animalia Appendicularia (class) Appendicularia sicula Copepoda Fritillaria (appendicularian) Fritillaria borealis Oikopleura dioica Oikopleura fusiformis |
| spellingShingle |
abundance biomass chlorophyll a community composition hypothesis testing metazoan seasonality secondary production size structure temporal variation zooplankton Argentina Atlantic Ocean Atlantic Ocean (Southwest) South America Animalia Appendicularia (class) Appendicularia sicula Copepoda Fritillaria (appendicularian) Fritillaria borealis Oikopleura dioica Oikopleura fusiformis Capitanio, F.L. Curelovich, J. Tresguerres, M. Negri, R.M. Viñas, M.D. Esnal, G.B. Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean |
| topic_facet |
abundance biomass chlorophyll a community composition hypothesis testing metazoan seasonality secondary production size structure temporal variation zooplankton Argentina Atlantic Ocean Atlantic Ocean (Southwest) South America Animalia Appendicularia (class) Appendicularia sicula Copepoda Fritillaria (appendicularian) Fritillaria borealis Oikopleura dioica Oikopleura fusiformis |
| description |
Temporal fluctuations in appendicularian species composition, abundance, size structure, and biomass, and their relationships with physical and biological factors were studied biweekly to monthly from March 2000 to April 2001 at a coastal station (38°28'S, 57°41'W) off Argentina, SW Atlantic Ocean. The highest abundances and biomasses were recorded during spring-summer with a maximum in early January (4369 ind m-3 = 2321 μg C m -3). Secondary production was 76 mg C m-3 yr-1 and house production was 123 mg C m-3yr-1 Abundance of Fritillaria borealis Lohmann, 1896 was related to temperature changes, being more abundant during fall-winter; however, we measured only low biomasses. Appendicularia sicula Fol, 1874 and Oikopleura fusiformis Fol, 1872 appeared during summer and autumn, but their abundances were low. Oikopleura dioica Fol, 1872 was present all year and was the dominant species. When chlorophyll a concentration was high, and copepod abundance was low (fall-winter period), both juvenile and adult O. dioica were abundant in all of the samples. During the spring-summer period (low chlorophyll a concentration) a high predominance of adult animals (up to 1400 μm TL) was observed, suggesting a strong predation by copepods upon O. dioica eggs and juveniles. However, further field evidence is needed to test this hypothesis. © 2008 Rosenstiel School of Marine and Atmospheric Science of the University of Miami. |
| format |
JOUR |
| author |
Capitanio, F.L. Curelovich, J. Tresguerres, M. Negri, R.M. Viñas, M.D. Esnal, G.B. |
| author_facet |
Capitanio, F.L. Curelovich, J. Tresguerres, M. Negri, R.M. Viñas, M.D. Esnal, G.B. |
| author_sort |
Capitanio, F.L. |
| title |
Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean |
| title_short |
Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean |
| title_full |
Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean |
| title_fullStr |
Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean |
| title_full_unstemmed |
Seasonal cycle of appendicularians at a coastal station (38°28'S, 57°41'W) of the SW Atlantic Ocean |
| title_sort |
seasonal cycle of appendicularians at a coastal station (38°28's, 57°41'w) of the sw atlantic ocean |
| url |
http://hdl.handle.net/20.500.12110/paper_00074977_v82_n2_p171_Capitanio |
| work_keys_str_mv |
AT capitaniofl seasonalcycleofappendiculariansatacoastalstation3828s5741woftheswatlanticocean AT curelovichj seasonalcycleofappendiculariansatacoastalstation3828s5741woftheswatlanticocean AT tresguerresm seasonalcycleofappendiculariansatacoastalstation3828s5741woftheswatlanticocean AT negrirm seasonalcycleofappendiculariansatacoastalstation3828s5741woftheswatlanticocean AT vinasmd seasonalcycleofappendiculariansatacoastalstation3828s5741woftheswatlanticocean AT esnalgb seasonalcycleofappendiculariansatacoastalstation3828s5741woftheswatlanticocean |
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1782026153661300736 |