Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle

Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle

12 pages, 4 figures, 5 tables

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Bibliographic Details
Main Authors: Ribes, Marta, Coma, Rafael, Gili, Josep Maria
Format: artículo biblioteca
Published: Inter Research 1999-01
Subjects:Prey selection, Suspension feeding, Natural diet, Grazing rate, Sponges, Dysidea avara, Mediterranean Sea,
Online Access:http://hdl.handle.net/10261/184203
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spelling dig-icm-es-10261-1842032020-12-11T08:59:05Z Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle Ribes, Marta Coma, Rafael Gili, Josep Maria Prey selection Suspension feeding Natural diet Grazing rate Sponges Dysidea avara Mediterranean Sea 12 pages, 4 figures, 5 tables Sponges are one of the major invertebrate groups inhabiting hard-bottom communities worldwide. In this study, we measured in situ rates of grazing on DOC (dissolved organic carbon), POC (particulate organic carbon), and pico- nano- and microplankton for the common temperate sponge Dysidea avara throughout a yearly cycle. The natural diet of the species was highly heterogeneous and included procaryotes (heterotrophic bacteria, Prochlorococcus sp., Synechococcus sp.) and eucaryotes (protozoa, phytoplankton, and ciliates) ranging m size from 0.5 ± 0.3 (heterotrophic bacteria) to 70 ± 0.3 μm (pennate diatoms). Procaryotic cell clearance rates were higher than those for the other groups, suggesting a higher grazing efficiency upon these prey types. Specific clearance rates showed a pattern of decrease with sponge size increase, although they did not vary with prey concentration or with temperature. Overall, procaryotes contributed 74 ± 14% of the total ingested carbon. pico- and nanoeucaryotes contributed 11 ± 3%, and phytoplankton contributed 11 ± 10%. Therefore, Dysidea avara obtained 85% of its ingested carbon from the fraction smaller than 5 μm and 15% from the fraction larger than 5 μm. However, the partial contributions of the different groups varied seasonally, following the planktonic composition of the water column. During winter phytoplankton was an important component of the total uptake (26%), whereas during the rest of the year it contributed less than 7% of the total uptake. The capacity of this sponge to feed on a broad size range of prey allowed it to maintain rather constant food uptake throughout the year. These results show the importance of particle type (size) for selective uptake in sponges, as well as the relevance of phytoplankton in the sponge diet. This trophic plasticity may represent an advantage for the species because it attenuates the effects of seasonal fluctuations in the planktonic community. This plasticity in trophic ecology may be one of the main factors contributing to the worldwide abundance and distribution of sponges despite large spatial and temporal variations in food sources Peer Reviewed 2019-06-17T09:10:38Z 2019-06-17T09:10:38Z 1999-01 2019-06-17T09:10:38Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.3354/meps176179 issn: 0171-8630 e-issn: 1616-1599 Marine Ecology Progress Series 176: 179-190 (1999) http://hdl.handle.net/10261/184203 10.3354/meps176179 Publisher's version https://doi.org/10.3354/meps176179 Sí open Inter Research
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 Prey selection
Suspension feeding
Natural diet
Grazing rate
Sponges
Dysidea avara
Mediterranean Sea
Prey selection
Suspension feeding
Natural diet
Grazing rate
Sponges
Dysidea avara
Mediterranean Sea
spellingShingle Prey selection
Suspension feeding
Natural diet
Grazing rate
Sponges
Dysidea avara
Mediterranean Sea
Prey selection
Suspension feeding
Natural diet
Grazing rate
Sponges
Dysidea avara
Mediterranean Sea
Ribes, Marta
Coma, Rafael
Gili, Josep Maria
Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle
description 12 pages, 4 figures, 5 tables
format artículo
topic_facet Prey selection
Suspension feeding
Natural diet
Grazing rate
Sponges
Dysidea avara
Mediterranean Sea
author Ribes, Marta
Coma, Rafael
Gili, Josep Maria
author_facet Ribes, Marta
Coma, Rafael
Gili, Josep Maria
author_sort Ribes, Marta
title Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle
title_short Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle
title_full Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle
title_fullStr Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle
title_full_unstemmed Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle
title_sort natural diet and grazing rate of the temperate sponge dysidea avara (demospongiae, dendroceratida) throughout an annual cycle
publisher Inter Research
publishDate 1999-01
url http://hdl.handle.net/10261/184203
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AT comarafael naturaldietandgrazingrateofthetemperatespongedysideaavarademospongiaedendroceratidathroughoutanannualcycle
AT gilijosepmaria naturaldietandgrazingrateofthetemperatespongedysideaavarademospongiaedendroceratidathroughoutanannualcycle
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