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

IRD

 

Publications des scientifiques de l'IRD

Diouf M., Sillam-Dussès David, Alphonse V., Frechault S., Miambi E., Mora P. (2019). Mercury species in the nests and bodies of soil-feeding termites, Silvestritermes spp. (Termitidae, Syntermitinae), in French Guiana. Environmental Pollution, 254 (B), art. 113064 [9 p.]. ISSN 0269-7491

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1016/j.envpol.2019.113064

Titre
Mercury species in the nests and bodies of soil-feeding termites, Silvestritermes spp. (Termitidae, Syntermitinae), in French Guiana
Année de publication2019
Type de documentArticle référencé dans le Web of Science WOS:000488887600061
AuteursDiouf M., Sillam-Dussès David, Alphonse V., Frechault S., Miambi E., Mora P.
SourceEnvironmental Pollution, 2019, 254 (B), p. art. 113064 [9 p.]. p. art. 113064 [9 p.] ISSN 0269-7491
RésuméMercury pollution is currently a major public health concern, given the adverse effects of mercury on wildlife and humans. Soil plays an essential role in speciation of mercury and its global cycling, while being a habitat for a wide range of terrestrial fauna. Soil fauna, primarily soil-feeding taxa that are in intimate contact with soil pollutants are key contributors in the cycling of soil mercury and might provide relevant indications about soil pollution. We studied the enrichment of various mercury species in the nests and bodies of soil-feeding termites Silvestritermes spp. in French Guiana. Soil-feeding termites are the only social insects using soil as both shelter and food and are major decomposers of organic matter in neotropical forests. Nests of S. minutus were depleted in total and mobile mercury compared to nearby soil. In contrast, they were enriched 17 times in methylmercury. The highest concentrations of methylmercury were found in body of both studied termite species, with mean bioconcentration factors of 58 for S. minutus and 179 for S. holmgreni relative to the soil. The assessment of the body distribution of methylmercury in S. minutus showed concentrations of 221 ng g(-1) for the guts and even higher for the gut-free carcasses (683 ng g(-1)), suggesting that methylmercury is not confined to the gut where it was likely produced, but rather stored in various tissues. This enrichment in the most toxic form of Hg in termites may be of concern on termite predators and the higher levels in the food chain that may be endangered through prey-to-predator transfers and bioaccumulation. Soil-feeding termites appear to be promising candidates as bio-indicators of mercury pollution in soils of neotropical rainforest ecosystems.
Plan de classementBiologie du sol [074] ; Pédologie [068] ; Pollution [038]
Descr. géo.GUYANE FRANCAISE
LocalisationFonds IRD [F B010077060]
Identifiant IRDfdi:010077060
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010077060

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