Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)

The macro- fauna and flora associated with 36 Macrocystis holdfasts in the ría Deseado (47" 45’ S, 65° 55’ W) were studied. Among the 27 taxonomic groups found, the bryozoans, polychaetes and rhodophyta clearly predomínate. Sórensen’s cualitative Índex was used to calcúlate the affmity between...

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Autores principales: López Gappa, J. J., Romanello, E. E., Hernández, D. A.
Formato: Artículo revista
Lenguaje:Español
Publicado: Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025
Materias:
macrofauna
macrocystis pyrifera
Santa Cruz (Argentina)
Acceso en línea:https://revistas.unne.edu.ar/index.php/eco/article/view/8582
Aporte de:
Revistas UNNE - Universidad Nacional del Noroeste (UNNE) de Universidad Nacional del Nordeste
id I48-R154-article-8582
record_format ojs
spelling I48-R154-article-85822025-08-21T15:01:57Z Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina) Observaciones sobre la macro-fauna y flora asociadas a los grampones de Macrocystis pyrifera (L.) C. Ag. en la ría Deseado (Santa Cruz, Argentina) López Gappa, J. J. Romanello, E. E. Hernández, D. A. macrofauna macrocystis pyrifera Santa Cruz (Argentina) The macro- fauna and flora associated with 36 Macrocystis holdfasts in the ría Deseado (47" 45’ S, 65° 55’ W) were studied. Among the 27 taxonomic groups found, the bryozoans, polychaetes and rhodophyta clearly predomínate. Sórensen’s cualitative Índex was used to calcúlate the affmity between samples. Most of the species of this community are common members of the benthic biota of the area; only the isopod Limmoria (Ph.) chilensis and the anphipods Bircenna fulva and Ampithoe femorata are strongly associated to Macrocystis by trophic relationships. The specific composition of the community is greatly influenced by the 'composition of the surrounding benthic fauna and flora. The distribution of the epibiosis on different algae and invertebrate genera of the holdfast community was studied, and ecological segregation, owing to the preference for different kinds of substraía was observed in spirorbid polychaetes and the bryozoan genus Celleporella. In order to characterize the holdfast community in this area, a list of the most frequent and abundant species is given. A marine ascomicete (Lulworthia sp.) parasiting Macrocystis is recorded for the first time. Se estudió la macrofauna y flora asociadas a 36 bases (holdfasts) de Macrocystis en la Ría Deseado (47° 45’ S, 65° 55’ O). Entre los 27 grupos taxonómicos encontrados, los briozóos, los poliquetos y las rodófitas predominan claramente. Se utilizó el Índice cualitativo de Sørensen para calcular la afinidad entre las muestras. La mayoría de las especies de esta comunidad son miembros comunes de la biota bentónica del área; solo el isópodo Limmoria (Ph.) chilensis y los anfípodos Bircenna fulva y Ampithoe femorata están fuertemente asociados a Macrocystis por relaciones tróficas. La composición específica de la comunidad está muy influenciada por la composición de la fauna y flora bentónicas circundantes. Se estudió la distribución de la epibiosis en diferentes géneros de algas e invertebrados de la comunidad de la base, y se observó una segregación ecológica debido a la preferencia por diferentes tipos de sustratos en los poliquetos espirórbidos y el género de briozoos Celleporella. Para caracterizar la comunidad de la base en esta área, se proporciona una lista de las especies más frecuentes y abundantes. Se registra por primera vez un ascomiceto marino (Lulworthia sp.) que parasita a Macrocystis. Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste) 2025-08-21 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artículo revisado por pares application/pdf https://revistas.unne.edu.ar/index.php/eco/article/view/8582 Ecosur; 1982: vol. 9, no. 17; 67-106 0325-108X spa https://revistas.unne.edu.ar/index.php/eco/article/view/8582/8128 https://creativecommons.org/licenses/by-nc/4.0
institution Universidad Nacional del Nordeste
institution_str I-48
repository_str R-154
container_title_str Revistas UNNE - Universidad Nacional del Noroeste (UNNE)
language Español
format Artículo revista
topic macrofauna
macrocystis pyrifera
Santa Cruz (Argentina)
spellingShingle macrofauna
macrocystis pyrifera
Santa Cruz (Argentina)
López Gappa, J. J.
Romanello, E. E.
Hernández, D. A.
Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)
topic_facet macrofauna
macrocystis pyrifera
Santa Cruz (Argentina)
author López Gappa, J. J.
Romanello, E. E.
Hernández, D. A.
author_facet López Gappa, J. J.
Romanello, E. E.
Hernández, D. A.
author_sort López Gappa, J. J.
title Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)
title_short Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)
title_full Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)
title_fullStr Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)
title_full_unstemmed Observations on the macro-fauna and flora associated to the holdfasts of Macrocystis pyrifera (L.) C. Ag. in the ría Deseado (Santa Cruz, Argentina)
title_sort observations on the macro-fauna and flora associated to the holdfasts of macrocystis pyrifera (l.) c. ag. in the ría deseado (santa cruz, argentina)
description The macro- fauna and flora associated with 36 Macrocystis holdfasts in the ría Deseado (47" 45’ S, 65° 55’ W) were studied. Among the 27 taxonomic groups found, the bryozoans, polychaetes and rhodophyta clearly predomínate. Sórensen’s cualitative Índex was used to calcúlate the affmity between samples. Most of the species of this community are common members of the benthic biota of the area; only the isopod Limmoria (Ph.) chilensis and the anphipods Bircenna fulva and Ampithoe femorata are strongly associated to Macrocystis by trophic relationships. The specific composition of the community is greatly influenced by the 'composition of the surrounding benthic fauna and flora. The distribution of the epibiosis on different algae and invertebrate genera of the holdfast community was studied, and ecological segregation, owing to the preference for different kinds of substraía was observed in spirorbid polychaetes and the bryozoan genus Celleporella. In order to characterize the holdfast community in this area, a list of the most frequent and abundant species is given. A marine ascomicete (Lulworthia sp.) parasiting Macrocystis is recorded for the first time.
publisher Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
publishDate 2025
url https://revistas.unne.edu.ar/index.php/eco/article/view/8582
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