Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)

Salps and chaetognaths constitute an important fraction of the macrozooplankton and have a prominent role in the marine food web. In our study, we analyzed the species composition, density, and biomass in an area of the southern Atlantic Ocean during the austral winters of 1999, 2000, and 2001. The...

Descripción completa

Detalles Bibliográficos
Autores principales: Daponte, María Cristina, Calcagno, Javier Angel, Acevedo, Nuria Cristina, Martos, Pedro José, Esnal, Graciela Beatriz
Publicado: 2011
Materias:
aquatic organism
biomass
community composition
estimation method
food web
invertebrate
marine environment
population density
species diversity
zooplankton
Atlantic Ocean
Atlantic Ocean (Southeast)
Chaetognatha
Copepoda
Iasis zonaria
Ihlea
Parasagitta
Salpida
Salpidae
Serratosagitta tasmanica
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00074977_v87_n3_p437_Daponte
http://hdl.handle.net/20.500.12110/paper_00074977_v87_n3_p437_Daponte
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00074977_v87_n3_p437_Daponte
record_format dspace
spelling paper:paper_00074977_v87_n3_p437_Daponte2023-06-08T14:31:51Z Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S) Daponte, María Cristina Calcagno, Javier Angel Acevedo, Nuria Cristina Martos, Pedro José Esnal, Graciela Beatriz aquatic organism biomass community composition estimation method food web invertebrate marine environment population density species diversity zooplankton Atlantic Ocean Atlantic Ocean (Southeast) Chaetognatha Copepoda Iasis zonaria Ihlea Parasagitta Salpida Salpidae Serratosagitta tasmanica Salps and chaetognaths constitute an important fraction of the macrozooplankton and have a prominent role in the marine food web. In our study, we analyzed the species composition, density, and biomass in an area of the southern Atlantic Ocean during the austral winters of 1999, 2000, and 2001. The most abundant and frequent species were the salpids Ihlea magalhanica (Apstein, 1894) and Iasis zonaria (Pallas, 1774), and the chaetognaths Parasagitta friderici (Ritter-Zahony, 1911) and Serratosagitta tasmanica (Thomson, 1947). Chaetognaths were found in over 80% of the stations throughout the three winters, reaching up to 67 individuals (ind) m -3. Salps were found surviving at low population densities in 2000 and 2001, but in 1999, there were mass occurrences of I. zonaria and I. magalhanica, reaching densities of 301 and 123 ind m -3, respectively. To estimate biomass in C units, the relationship between dry weight and size was calculated for S. tasmanica and for solitaries and aggregates of I. zonaria and I, magalhanica. The biomass of salps and chaetognaths (as mg C m -3) over the shelf during the three consecutive winters was strongly related to prevailing physical and biological conditions. In 1999, the greatest contribution to macrozooplankton biomass corresponded to salps, while in 2000 and 2001, chaetognaths dominated the biomass. In swarm conditions, like in 1999, I. zonaria and I. magalhanica widely dominated over copepods and chaetognaths, producing an increase in the quantity of available C of up to 60 times in relation to the periods with very low population densities. © 2011 Rosenstiel School of Marine and Atmospheric Science. Fil:Daponte, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Calcagno, J.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Acevedo-Luque, M.J.J. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Martos, P. 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. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00074977_v87_n3_p437_Daponte http://hdl.handle.net/20.500.12110/paper_00074977_v87_n3_p437_Daponte
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic aquatic organism
biomass
community composition
estimation method
food web
invertebrate
marine environment
population density
species diversity
zooplankton
Atlantic Ocean
Atlantic Ocean (Southeast)
Chaetognatha
Copepoda
Iasis zonaria
Ihlea
Parasagitta
Salpida
Salpidae
Serratosagitta tasmanica
spellingShingle aquatic organism
biomass
community composition
estimation method
food web
invertebrate
marine environment
population density
species diversity
zooplankton
Atlantic Ocean
Atlantic Ocean (Southeast)
Chaetognatha
Copepoda
Iasis zonaria
Ihlea
Parasagitta
Salpida
Salpidae
Serratosagitta tasmanica
Daponte, María Cristina
Calcagno, Javier Angel
Acevedo, Nuria Cristina
Martos, Pedro José
Esnal, Graciela Beatriz
Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)
topic_facet aquatic organism
biomass
community composition
estimation method
food web
invertebrate
marine environment
population density
species diversity
zooplankton
Atlantic Ocean
Atlantic Ocean (Southeast)
Chaetognatha
Copepoda
Iasis zonaria
Ihlea
Parasagitta
Salpida
Salpidae
Serratosagitta tasmanica
description Salps and chaetognaths constitute an important fraction of the macrozooplankton and have a prominent role in the marine food web. In our study, we analyzed the species composition, density, and biomass in an area of the southern Atlantic Ocean during the austral winters of 1999, 2000, and 2001. The most abundant and frequent species were the salpids Ihlea magalhanica (Apstein, 1894) and Iasis zonaria (Pallas, 1774), and the chaetognaths Parasagitta friderici (Ritter-Zahony, 1911) and Serratosagitta tasmanica (Thomson, 1947). Chaetognaths were found in over 80% of the stations throughout the three winters, reaching up to 67 individuals (ind) m -3. Salps were found surviving at low population densities in 2000 and 2001, but in 1999, there were mass occurrences of I. zonaria and I. magalhanica, reaching densities of 301 and 123 ind m -3, respectively. To estimate biomass in C units, the relationship between dry weight and size was calculated for S. tasmanica and for solitaries and aggregates of I. zonaria and I, magalhanica. The biomass of salps and chaetognaths (as mg C m -3) over the shelf during the three consecutive winters was strongly related to prevailing physical and biological conditions. In 1999, the greatest contribution to macrozooplankton biomass corresponded to salps, while in 2000 and 2001, chaetognaths dominated the biomass. In swarm conditions, like in 1999, I. zonaria and I. magalhanica widely dominated over copepods and chaetognaths, producing an increase in the quantity of available C of up to 60 times in relation to the periods with very low population densities. © 2011 Rosenstiel School of Marine and Atmospheric Science.
author Daponte, María Cristina
Calcagno, Javier Angel
Acevedo, Nuria Cristina
Martos, Pedro José
Esnal, Graciela Beatriz
author_facet Daponte, María Cristina
Calcagno, Javier Angel
Acevedo, Nuria Cristina
Martos, Pedro José
Esnal, Graciela Beatriz
author_sort Daponte, María Cristina
title Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)
title_short Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)
title_full Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)
title_fullStr Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)
title_full_unstemmed Composition, density, and biomass of salpidae and chaetognatha in the southwestern Atlantic Ocean (34.5°S-39°S)
title_sort composition, density, and biomass of salpidae and chaetognatha in the southwestern atlantic ocean (34.5°s-39°s)
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00074977_v87_n3_p437_Daponte
http://hdl.handle.net/20.500.12110/paper_00074977_v87_n3_p437_Daponte
work_keys_str_mv AT dapontemariacristina compositiondensityandbiomassofsalpidaeandchaetognathainthesouthwesternatlanticocean345s39s
AT calcagnojavierangel compositiondensityandbiomassofsalpidaeandchaetognathainthesouthwesternatlanticocean345s39s
AT acevedonuriacristina compositiondensityandbiomassofsalpidaeandchaetognathainthesouthwesternatlanticocean345s39s
AT martospedrojose compositiondensityandbiomassofsalpidaeandchaetognathainthesouthwesternatlanticocean345s39s
AT esnalgracielabeatriz compositiondensityandbiomassofsalpidaeandchaetognathainthesouthwesternatlanticocean345s39s
_version_ 1768542297352306688

Ejemplares similares