Talaga S., Petitclerc F., Carrias J. F., Dezerald O., Leroy Céline, Cereghino R., Dejean A. (2017). Environmental drivers of community diversity in a neotropical urban landscape : a multi-scale analysis. Landscape Ecology, 32 (9), p. 1805-1818. ISSN 0921-2973.
Titre du document
Environmental drivers of community diversity in a neotropical urban landscape : a multi-scale analysis
Année de publication
2017
Auteurs
Talaga S., Petitclerc F., Carrias J. F., Dezerald O., Leroy Céline, Cereghino R., Dejean A.
Source
Landscape Ecology, 2017,
32 (9), p. 1805-1818 ISSN 0921-2973
Context Many aquatic communities are linked by the aerial dispersal of multiple, interacting species and are thus structured by processes occurring in both the aquatic and terrestrial compartments of the ecosystem. Objectives To evaluate the environmental factors shaping the aquatic macroinvertebrate communities associated with tank bromeliads in an urban landscape. Methods Thirty-two bromeliads were georeferenced to assess the spatial distribution of the aquatic metahabitat in one city. The relative influence of the aquatic and terrestrial habitats on the structure of macroin-vertebrate communities was analyzed at four spatial scales (radius = 10, 30, 50, and 70 m) using redundancy analyses. Results We sorted 18,352 aquatic macroinvertebrates into 29 taxa. Water volume and the amount of organic matter explained a significant part of the taxa variance, regardless of spatial scale. The remaining variance was explained by the meta-habitat size (i.e., the water volume for all of the bromeliads within a given surface area), the distance to the nearest building at small scales, and the surface area of buildings plus ground cover at larger scales. At small scales, the meta-habitat size influenced the two most frequent mosquito species in opposite ways, suggesting spatial competition and coexistence. Greater vegetation cover favored the presence of a top predator. Conclusions The size of the meta-habitat and urban landscape characteristics influence the structure of aquatic communities in tank bromeliads, including mosquito larval abundance. Modifications to this landscape will affect both the terrestrial and aquatic compartments of the urban ecosystem, offering prospects for mosquito management during urban planning.
Plan de classement
Ecologie, systèmes aquatiques [036]
;
Entomologie médicale / Parasitologie / Virologie [052]
;
Sciences du monde végétal [076]
;
Urbanisation et sociétés urbaines [102]
Description Géographique
GUYANE FRANCAISE ; SINNAMARY
Localisation
Fonds IRD [F B010070879]
Identifiant IRD
fdi:010070879
