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: | , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
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Centro de Ecología Aplicada del Litoral (Consejo Nacional de Investigaciones Científicas y Técnicas - Universidad Nacional de Nordeste)
2025
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| Acceso en línea: | https://revistas.unne.edu.ar/index.php/eco/article/view/8582 |
| Aporte de: |
| Sumario: | 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. |
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