Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information
The composition of endobionts in the sponge Mycale (Aegogropila) magellanica at the shelf-break, near 100 m depth, in the Argentine Sea was studied. We also provide new information on the distribution of M. (A.) magellanica, extending its northern limit to 38o36.02'S and 55o44.68'W, 91 m i...
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todo:paper_02148358_v76_n4_p753_Schejter2023-10-03T15:10:18Z Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information Schejter, L. Chiesa, I.L. Doti, B.L. Bremec, C. Argentine Sea Benthic richness Mycale (Aegogropila) magellanica Sponge-invertebrate associations benthos biodiversity community composition crustacean fauna invertebrate shelf break sponge taxonomy Argentine Sea Atlantic Ocean Amphipoda Aristias antarcticus Bivalvia Caecognathia Crustacea Demospongiae Hiatella Invertebrata Isopoda Leucothoe spinicarpa Mycale magellanica Ophiactis asperula Ophiuroidea Porifera The composition of endobionts in the sponge Mycale (Aegogropila) magellanica at the shelf-break, near 100 m depth, in the Argentine Sea was studied. We also provide new information on the distribution of M. (A.) magellanica, extending its northern limit to 38o36.02'S and 55o44.68'W, 91 m in the SW Atlantic Ocean. The main Patagonian scallop fishing grounds are located in the shelf-break frontal area of the Argentine Sea. In this area, M. (A.) magellanica plays an important role in providing habitat for at least 23 taxa of small invertebrates, mostly crustaceans (66% to 96% of the total number of individuals). On average, this sponge hosted 348 individuals per litre; Aristias cf. antarcticus (Amphipoda) was the most frequent and abundant species. Other organisms commonly found were the isopod Caecognathia sp., the amphipod Leucothoe cf. spinicarpa, the bivalve Hiatella meridionalis and the ophiuroid Ophiactis asperula. As previously demonstrated for other sponges, our study suggests that M. (A.) magellanica enhances benthic biodiversity, as it shelters a variety of invertebrate species. In areas of soft and flat substrate, erect and sessile epifauna usually acts as an ecosystem engineer, structuring the architecture of the habitat by increasing the sea-bottom complexity. Mass removal of this fauna due to intense trawling activities on Patagonian scallop beds could have devastating effects on local biodiversity. Fil:Chiesa, I.L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Doti, B.L. 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_02148358_v76_n4_p753_Schejter |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Argentine Sea Benthic richness Mycale (Aegogropila) magellanica Sponge-invertebrate associations benthos biodiversity community composition crustacean fauna invertebrate shelf break sponge taxonomy Argentine Sea Atlantic Ocean Amphipoda Aristias antarcticus Bivalvia Caecognathia Crustacea Demospongiae Hiatella Invertebrata Isopoda Leucothoe spinicarpa Mycale magellanica Ophiactis asperula Ophiuroidea Porifera |
| spellingShingle |
Argentine Sea Benthic richness Mycale (Aegogropila) magellanica Sponge-invertebrate associations benthos biodiversity community composition crustacean fauna invertebrate shelf break sponge taxonomy Argentine Sea Atlantic Ocean Amphipoda Aristias antarcticus Bivalvia Caecognathia Crustacea Demospongiae Hiatella Invertebrata Isopoda Leucothoe spinicarpa Mycale magellanica Ophiactis asperula Ophiuroidea Porifera Schejter, L. Chiesa, I.L. Doti, B.L. Bremec, C. Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information |
| topic_facet |
Argentine Sea Benthic richness Mycale (Aegogropila) magellanica Sponge-invertebrate associations benthos biodiversity community composition crustacean fauna invertebrate shelf break sponge taxonomy Argentine Sea Atlantic Ocean Amphipoda Aristias antarcticus Bivalvia Caecognathia Crustacea Demospongiae Hiatella Invertebrata Isopoda Leucothoe spinicarpa Mycale magellanica Ophiactis asperula Ophiuroidea Porifera |
| description |
The composition of endobionts in the sponge Mycale (Aegogropila) magellanica at the shelf-break, near 100 m depth, in the Argentine Sea was studied. We also provide new information on the distribution of M. (A.) magellanica, extending its northern limit to 38o36.02'S and 55o44.68'W, 91 m in the SW Atlantic Ocean. The main Patagonian scallop fishing grounds are located in the shelf-break frontal area of the Argentine Sea. In this area, M. (A.) magellanica plays an important role in providing habitat for at least 23 taxa of small invertebrates, mostly crustaceans (66% to 96% of the total number of individuals). On average, this sponge hosted 348 individuals per litre; Aristias cf. antarcticus (Amphipoda) was the most frequent and abundant species. Other organisms commonly found were the isopod Caecognathia sp., the amphipod Leucothoe cf. spinicarpa, the bivalve Hiatella meridionalis and the ophiuroid Ophiactis asperula. As previously demonstrated for other sponges, our study suggests that M. (A.) magellanica enhances benthic biodiversity, as it shelters a variety of invertebrate species. In areas of soft and flat substrate, erect and sessile epifauna usually acts as an ecosystem engineer, structuring the architecture of the habitat by increasing the sea-bottom complexity. Mass removal of this fauna due to intense trawling activities on Patagonian scallop beds could have devastating effects on local biodiversity. |
| format |
JOUR |
| author |
Schejter, L. Chiesa, I.L. Doti, B.L. Bremec, C. |
| author_facet |
Schejter, L. Chiesa, I.L. Doti, B.L. Bremec, C. |
| author_sort |
Schejter, L. |
| title |
Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information |
| title_short |
Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information |
| title_full |
Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information |
| title_fullStr |
Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information |
| title_full_unstemmed |
Mycale (Aegogropila) magellanica (Porifera: Demospongiae) in the southwestern Atlantic Ocean: Endobiotic fauna and new distributional information |
| title_sort |
mycale (aegogropila) magellanica (porifera: demospongiae) in the southwestern atlantic ocean: endobiotic fauna and new distributional information |
| url |
http://hdl.handle.net/20.500.12110/paper_02148358_v76_n4_p753_Schejter |
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