Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Tribollet Aline, Grange J. S., Parra H., Rodolfo-Metalpa Riccardo, Carreiro-Silva M. (2018). Limited carbonate dissolution by boring microflora at two volcanically acidified temperate sites : Ischia (Italy, Mediterranean Sea) and Faial (Azores, NE Atlantic Ocean). Global Biogeochemical Cycles, 32 (1), 78-91. ISSN 0886-6236

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1002/2016gb005575

Titre
Limited carbonate dissolution by boring microflora at two volcanically acidified temperate sites : Ischia (Italy, Mediterranean Sea) and Faial (Azores, NE Atlantic Ocean)
Année de publication2018
Type de documentArticle référencé dans le Web of Science WOS:000425394900006
AuteursTribollet Aline, Grange J. S., Parra H., Rodolfo-Metalpa Riccardo, Carreiro-Silva M.
SourceGlobal Biogeochemical Cycles, 2018, 32 (1), p. 78-91. ISSN 0886-6236
RésuméIn situ effects of ocean acidification on carbonate dissolution by microboring flora, also called biogenic dissolution, have only been studied once in tropical environments. Naturally acidified seawaters due to CO2 vents offer a perfect setting to study these effects in temperate systems. Three sites were selected at Ischia (Italy, Mediterranean Sea) with one experiencing ambient pH and the two others a mean pH(T) of 7.2 and 7.5. At Faial (Azores, NE Atlantic), one site with ambient pH and one acidified site with a mean pH(T) of 7.4 were selected. Experiments were carried out during 1.5 months and 6 months in Azores and Ischia, respectively, to determine the effects of OA on microboring communities in various carbonate substrates. Low pH influenced negatively boring microflora development by limiting their depth of penetration and abundance in substrates. Biogenic dissolution was thus reduced by a factor 3 to 7 depending on sites and substrate types. At sites with ambient pH in Faial, biogenic dissolution contributed up to 23% to the total weight loss, while it contributed less than 1% to the total weight loss of substrates at the acidified sites. Most of the dissolution at these sites was due to chemical dissolution (often Omega <= 1). Such conditions maintained microboring communities at a pioneer stage with a limited depth of penetration in substrates. Our results, together with previous findings that showed an increase of biogenic dissolution at pH>7.7, suggest that there is a pH tipping point below which microborer development and thus carbonate biogenic dissolution is strongly limited.
Plan de classementLimnologie physique / Océanographie physique [032]
Descr. géo.MEDITERRANEE ; ITALIE ; ATLANTIQUE ; ACORES ; ZONE TEMPEREE
LocalisationFonds IRD [F B010072366]
Identifiant IRDfdi:010072366
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010072366

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito