Identification of birds as biological markers along a neotropical urban-rural gradient (Cayenne, French Guiana), using co-inertia analysis

摘要: Abstract This article examines the utility of particular bird species and guilds as bioindicators in a complex habitat mosaic, namely that tropical city Cayenne (French Guyana). For this purpose, an urbanization gradient was divided up into nine classes based on 576 standard counts (using point-count method) conducted around between 1992 1995. Each location characterized by 10 variables. A multiple correspondence analysis data set, followed cluster analysis, used to establish classification eight habitats, according level anthropogenic disturbance diversity vegetation. 13 667 birds, belonging 136 species, were recorded. co-inertia linking point-counts 72 most common urban–rural showed populations distributed along extending from second-growth forest old center. The fell 11 trophic guilds. Six these guilds, which had high relative density or homogenous distribution, not characterization habitats. large differences among five other allowed them serve indicators. dominant wide-ranging, could be biological markers. brought out associations with some habitats 64 species. omnivorous marker specific step gradient, while each insectivorous associated increased vegetation structure. With investment just sampling points, it possible characterize using combination observations maximum case shows methodology understand relationships environmental changes avifaunal responses. conclusions will useful for management open spaces growing towns belt.