English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/112568
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:

Natural heterotrophic feeding by a temperate octocoral with symbiotic zooxanthellae: a contribution to understanding the mechanisms of die-off events

AuthorsComa, Rafael ; Llorente-Llurba, Eduard; Serrano, Eduard ; Gili, Josep Maria ; Ribes, Marta
KeywordsEunicella singularis
Natural diet
Capture rate
Digestion time
Feeding ecology
Issue Date2015
CitationCoral Reefs 34(2): 549-560 (2015)
AbstractOctocorals are among the most emblematic and representative organisms of sublittoral communities in both tropical and temperate seas. Eunicella singularis is the most abundant gorgonian in shallow waters and the only gorgonian with symbiotic zooxanthellae in the Mediterranean Sea. We studied the natural diet and prey capture rate of this species over an annual cycle and characterized prey digestion time over the natural temperature regime. The species captured zooplankton prey between 40 and 920 lm. A mean content of 0.14 ± 0.02 prey polyp-1 was observed throughout the year. The strong pattern of decrease in digestion time with temperature increase (from 25 h at 13 C to 8 h at 21 C) allowed us to estimate that the prey capture rate was 0.017 ± 0.002 prey polyp-1 h-1 (mean ± SE); the ingestion rate exhibited a seasonal pattern with higher values in spring (0.007 lg C polyp-1 h-1). Feeding on zooplankton had a low contribution to the respiratory expenses of E. singularis except in early spring. Then, heterotrophic nutrition in the natural environment seems unable to meet basal metabolic requirements, especially in summer and fall. This result, in conjunction with the documented collapse of photosynthetic capacity above a warm temperature threshold, indicates the occurrence of a resource acquisition limitation that may play a role in the repeated summer die-off events of the species.
Description12 páginas, 6 figuras, 2 tablas
Publisher version (URL)http://dx.doi.org/10.1007/s00338-015-1281-3
Appears in Collections:(CEAB) Artículos
(ICM) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.