De Barros J. A., De Medeiros E. V., Da Costa D. P., Duda G. P., Lima J. R. D., Dos Santos U. J., Antonino A. C. D., Hammecker Claude. (2020). Human disturbance affects enzyme activity, microbial biomass and organic carbon in tropical dry sub-humid pasture and forest soils. Archives of Agronomy and Soil Science, 66 (4), 458-472. ISSN 0365-0340.
Titre du document
Human disturbance affects enzyme activity, microbial biomass and organic carbon in tropical dry sub-humid pasture and forest soils
Année de publication
2020
Auteurs
De Barros J. A., De Medeiros E. V., Da Costa D. P., Duda G. P., Lima J. R. D., Dos Santos U. J., Antonino A. C. D., Hammecker Claude
Source
Archives of Agronomy and Soil Science, 2020,
66 (4), 458-472 ISSN 0365-0340
The Brazilian dry forest occupies an area of about 1 million km(2) approximately 46% of which has been deforested. Many studies have been done on the effects of this on productivity and soil chemical attributes. However, little is known about soil enzymatic activity, which is sensitive to environmental changes. The objective of this study was to evaluate the effects of deforestation using different levels of human disturbance on soil enzyme activities, organic carbon content, microbial biomass, and microbial community. We studied areas covered with forest (TDF), old grass (OG), or new grass (NG). Soils from NG had increased microorganisms, which restored important processes related to carbon, sulfur, and nitrogen cycling, so that they resembled those in the forested area. The results of this study showed that the conversion of forest to pasture with a high level of human disturbance could decrease the activities of beta-glucosidase, urease, alkaline phosphatase, and fluorescein diacetate in the soil by up to 87%, 66%, 62%, and 58%, respectively. These findings suggest that human disturbance can cause substantial changes in the enzymatic activity and microbial community in the soil. We suggest that maintaining grass pasture with low human disturbance should have fewer impacts on soil quality.
Plan de classement
Pédologie [068]
;
Biologie du sol [074]
;
Etudes, transformation, conservation du milieu naturel [082]
Description Géographique
BRESIL ; PERNAMBUCO ; ZONE TROPICALE
Localisation
Fonds IRD [F B010076095]
Identifiant IRD
fdi:010076095
