Soil carbon stocks after forest conversion to tree plantations in lowland Amazonia, Brazil
| Autor: | A. M. V. Baima, C. Ken Smith, Henry L. Gholz, Francisco de Assis Oliveira |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Forest floor
Carapa guianensis geography geography.geographical_feature_category biology Agroforestry ved/biology ved/biology.organism_classification_rank.species Forestry Management Monitoring Policy and Law Old-growth forest biology.organism_classification Oxisol Litter Environmental science Multipurpose tree Dalbergia nigra Silviculture Nature and Landscape Conservation |
| Zdroj: | Forest Ecology and Management. 164:257-263 |
| ISSN: | 0378-1127 |
| Popis: | The large-scale conversion of Amazonian forest to other land-uses is altering carbon (C) stocks in this important eco-region, and these changes will in turn influence global C cycling. In this study, we evaluated changes of forest floor and surface soil C storage caused by converting primary Amazonian forest to tree plantations at the Curua-Una Forest Reserve, Para, Brazil. The plantations were established between 1959 and 1973 and they consisted of replicated plots of Pinus caribaea var. hondurensis Barrett and Golfari, Carapa guianensis Aubl., Euxylophora paraensis Hub., and a Leguminosae combination ( Parkia multijuga Benth., Dinizia excelsa Ducke, Dalbergia nigra Fr. All. In surface soils (0–20 cm), mean C stocks ranged from 7 ( P. caribaea ) to 11 kg m −2 ( E. paraensis ). Fine litter C inputs ranged from 380 g m −2 ( E. paraensis ) to 513 g m −2 ( P. caribaea ), and forest floor C stocks (fine material) ranged from 359 ( E. paraensis ) to 542 g m −2 ( P. caribaea ). P. caribaea had the smallest fine root biomass–C (≤2 mm diameter) in the forest floor and surface soils (101 g m −2 ). Relative to adjacent terra firme forest, total C stocks in the surface mineral soil, forest floor, and fine roots (live+dead) in the plantations ranged from a net decrease of 13% ( P. caribaea ) to a net increase of 7% ( E. paraensis ). |
| Databáze: | OpenAIRE |
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