Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?

Cartes, Joan Enric; Lo Iacono, Claudio; Mamouridis, Valeria; López-Pérez, C.; Rodríguez Fornes, Pablo

Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?

14 pages, 9 figures, 7 tables

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Main Authors:	Cartes, Joan Enric, Lo Iacono, Claudio, Mamouridis, Valeria, López-Pérez, C., Rodríguez Fornes, Pablo
Format:	artículo biblioteca
Published:	Pergamon Press 2013-06
Subjects:	Stable isotopy, Trophic relationships, Invertebrates, Fish, Forming habitat, Canyons, Bamboo coral, Isidella elongata, Deep Mediterranean,
Online Access:	http://hdl.handle.net/10261/93837
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id	dig-icm-es-10261-93837
record_format	koha
spelling	dig-icm-es-10261-938372020-11-10T10:42:24Z Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates? Cartes, Joan Enric Lo Iacono, Claudio Mamouridis, Valeria López-Pérez, C. Rodríguez Fornes, Pablo Stable isotopy Trophic relationships Invertebrates Fish Forming habitat Canyons Bamboo coral Isidella elongata Deep Mediterranean 14 pages, 9 figures, 7 tables We analyzed what are the best ecological conditions for megafauna associated with the bamboo coral Isidella elongata based on the geomorphological, physical and trophic information taken in 3 stations (St1, St2, St3) off the southern Catalonian coasts at 620 m depth in June 2011. Results were compared with assemblage compositions recorded in past cruises (May 1992, 1994) at the same 3 stations. St1 was in a fishing ground exploited since the 1940s over a relatively wide slope at ca. 22 km from the nearest canyon head; St2 and St3 were on a narrower slope closer to canyon heads and to the Ebro river mouth than St1. I. elongata had formed (to May 1994, at least) a dense coral forest at St2–St3 (to ca. 255 colonies/ha at St3), and some isolated colonies (to ca. 0.9 colonies/ha) were still collected in 2011. Fish and invertebrate communities significantly differed between St1 and St2/St3, with two macrourid fishes (Trachrhynchus trachyrhynchus and Nezumia aequalis) and two decapods (Plesionika martia and Plesionika acanthonotus) more abundant at St2/St3. The following ecological indicators imply better food conditions for megafauna at St2–St3 and for I. elongata itself: (i) greater density of zooplankton (copepods, euphausiids, and others) as potential prey for planktivores (including I. elongata); (ii) greater biomass and mean weight of epifaunal and infaunal deposit feeders; (iii) higher feeding intensity, F, at St3 for benthos feeders (Phycis blennoides, N. aequalis and Aristeus antennatus). Also, at St2–St3 we found higher near-bottom turbidity (indicating particle resuspension: food for suspension feeders) and finer and more reduced (Eh) sediments. The results let us suggest that corals and accompanying fauna preferently found optimal ecological conditions in the same habitat, while habitat-forming capacity by I. elongata seemed weak to generate these conditions. Coral forests may enhance detritus accumulations around them, improving habitat conditions for benthos feeders (e.g. macrourid fish). At St3 our side-scan sonar recorded three types of tracks produced by trawler doors, which match with three identified vessels occasionally operating in the area. After this low fishing activity off the Ebro Delta since the mid-1990s, almost all colonies of I. elongata has been removed. However, this impact has hardly altered fish and invertebrate composition without any significant loss of diversity, pointing also toward a rather low capacity of I. elongata facies in forming habitat for megafauna on muddy bottoms of the Mediterranean slope This research was performed and financed within the framework of the MICYT project ANTROMARE (CTM2009-12214-C02-01-MAR) Peer Reviewed 2014-03-18T12:59:03Z 2014-03-18T12:59:03Z 2013-06 2014-03-18T12:59:03Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.dsr.2013.01.006 issn: 0967-0637 e-issn: 1879-0119 Deep-Sea Research Part I: Oceanographic Research Papers 76: 52-65 (2013) http://hdl.handle.net/10261/93837 10.1016/j.dsr.2013.01.006 https://doi.org/10.1016/j.dsr.2013.01.006 none Pergamon Press
institution	ICM ES
collection	DSpace
country	España
countrycode	ES
component	Bibliográfico
access	En linea
databasecode	dig-icm-es
tag	biblioteca
region	Europa del Sur
libraryname	Biblioteca del ICM España
topic	Stable isotopy Trophic relationships Invertebrates Fish Forming habitat Canyons Bamboo coral Isidella elongata Deep Mediterranean Stable isotopy Trophic relationships Invertebrates Fish Forming habitat Canyons Bamboo coral Isidella elongata Deep Mediterranean
spellingShingle	Stable isotopy Trophic relationships Invertebrates Fish Forming habitat Canyons Bamboo coral Isidella elongata Deep Mediterranean Stable isotopy Trophic relationships Invertebrates Fish Forming habitat Canyons Bamboo coral Isidella elongata Deep Mediterranean Cartes, Joan Enric Lo Iacono, Claudio Mamouridis, Valeria López-Pérez, C. Rodríguez Fornes, Pablo Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?
description	14 pages, 9 figures, 7 tables
format	artículo
topic_facet	Stable isotopy Trophic relationships Invertebrates Fish Forming habitat Canyons Bamboo coral Isidella elongata Deep Mediterranean
author	Cartes, Joan Enric Lo Iacono, Claudio Mamouridis, Valeria López-Pérez, C. Rodríguez Fornes, Pablo
author_facet	Cartes, Joan Enric Lo Iacono, Claudio Mamouridis, Valeria López-Pérez, C. Rodríguez Fornes, Pablo
author_sort	Cartes, Joan Enric
title	Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?
title_short	Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?
title_full	Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?
title_fullStr	Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?
title_full_unstemmed	Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?
title_sort	geomorphological, trophic and human influences on the bamboo coral isidella elongata assemblages in the deep mediterranean: to what extent does isidella form habitat for fish and invertebrates?
publisher	Pergamon Press
publishDate	2013-06
url	http://hdl.handle.net/10261/93837
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Geomorphological, trophic and human influences on the bamboo coral Isidella elongata assemblages in the deep Mediterranean: To what extent does Isidella form habitat for fish and invertebrates?

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