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

IRD

 

Publications des scientifiques de l'IRD

Ibanez T., Hequet Vanessa, Chambrey C., Jaffré Tanguy, Birnbaum P. (2017). How does forest fragmentation affect tree communities ? A critical case study in the biodiversity hotspot of New Caledonia. Landscape Ecology, 32 (8), 1671-1687. ISSN 0921-2973

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1007/s10980-017-0534-7

Titre
How does forest fragmentation affect tree communities ? A critical case study in the biodiversity hotspot of New Caledonia
Année de publication2017
Type de documentArticle référencé dans le Web of Science WOS:000405326500011
AuteursIbanez T., Hequet Vanessa, Chambrey C., Jaffré Tanguy, Birnbaum P.
SourceLandscape Ecology, 2017, 32 (8), p. 1671-1687. ISSN 0921-2973
RésuméContext The biodiversity hotspot for conservation of New Caledonia has facing high levels of forest fragmentation. Remnant forests are critical for biodiversity conservation and can help in understanding how does forest fragmentation affect tree communities. Objective Determine the effect of habitat configuration and availability on tree communities. Methods We mapped forest in a 60 km 2 landscape and sampled 93 tree communities in 52 forest fragments following stratified random sampling. At each sampling point, we inventoried all trees with a diameter at breast height >= 10 cm within a radius of 10 m. We then analysed the response of the composition, the structure and the richness of tree communities to the fragment size and isolation, distance from the edge, as well as the topographical position. Results Our results showed that the distance from the forest edge was the variable that explained the greatest observed variance in tree assemblages. We observed a decrease in the abundance and richness of animaldispersed trees as well as a decrease in the abundance of large trees with increasing proximity to forest edges. Near forest edgeswe found a shift in species composition with a dominance of stress-tolerant pioneer species. Conclusions Edge-effects are likely to be the main processes that affect remnant forest tree communities after about a century of forest fragmentation. It results in retrogressive successions at the edges leading to a dominance of stress-tolerant species. The vegetation surrounding fragments should be protected to promote the long process of forest extension and subsequently reduce edge-effects.
Plan de classementEtudes, transformation, conservation du milieu naturel [082]
Descr. géo.NOUVELLE CALEDONIE
LocalisationFonds IRD [F B010070338]
Identifiant IRDfdi:010070338
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010070338

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