Rossi J. P., Celini L., Mora P., Mathieu Jérôme, Lapied E., Nahmani J., Ponge J.F., Lavelle Patrick. (2010). Decreasing fallow duration in tropical slash-and-burn agriculture alters soil macro invertebrate diversity : a case study in southern French Guiana. Agriculture Ecosystems and Environment, 135 (1-2), p. 148-154. ISSN 0167-8809.
Titre du document
Decreasing fallow duration in tropical slash-and-burn agriculture alters soil macro invertebrate diversity : a case study in southern French Guiana
Rossi J. P., Celini L., Mora P., Mathieu Jérôme, Lapied E., Nahmani J., Ponge J.F., Lavelle Patrick
Source
Agriculture Ecosystems and Environment, 2010,
135 (1-2), p. 148-154 ISSN 0167-8809
In the humid tropics, slash-and-burn cultivation causes changes in the composition of soil biota communities. We investigated the soil macroinvertebrates (body length >= 2 mm) in five sites, two at Maripasoula, an Aluku village along the Maroni river (French Guiana), with short fallow (approximate to 8 years), and the other three at Elahe, a Wayana village along the same river, with long fallow (approximate to 25 years). We report observed species richness, the corresponding estimates by bootstrap and its associated standard deviation. At both sites the cultivation led to impoverished communities. The overall observed species richness Le. gamma diversity was ca. twice as larger in Elahe than in Maripasoula. The landscape at Maripasoula was dominated by highly disturbed areas with the direct consequence that local species richness relied on colonization from an impoverished regional species pool. On the contrary, in Elahe, crops formed small patches scattered across a landscape essentially constituted of rich undisturbed or slightly disturbed forests hence higher gamma diversity. The proportion of rare species ranged from 44% to 54%. We found 6 indicator species amongst which 5 were associated to the old secondary forest in Elahe and one, the earthworm Pontoscolex corethrurus was associated to crop fields in Maripasoula (short fallow system). Results are discussed in a landscape context in terms of conservation and management of soil macrofaunal diversity in agro-ecosystems.
Plan de classement
Sciences du milieu [021]
;
Biologie du sol [074]
;
Sciences du monde végétal [076]
