Data/hora: 03/06/2024 11:00:52

Biblioteca(s): | Embrapa Amazônia Oriental.
Data corrente: | 01/09/2017
Data da última atualização: | 08/06/2022
Autoria: | PALACE, M.; KELLER, M.; ASNER, G. P.; SILVA, J. N. M.; PASSOS, C.
Afiliação: | MICHAEL PALACE, University of New Hampshire; MICHAEL KELLER, University of New Hampshire / USDA Forest Service; GREGORY P. ASNER, Stanford University; JOSÉ NATALINO MACÊDO SILVA, Embrapa Amazônia Oriental; CARLOS PASSOS, UFMT.
Título: | Necromass in undisturbed and logged forests in the Brazilian Amazon.
Ano de publicação: | 2007
Fonte/Imprenta: | Forest Ecology and Management, v. 238, n. 1/3, p. 309-318, Jan. 2007.
DOI: | 10.1016/j.foreco.2006.10.026
Idioma: | Inglês
Conteúdo: | Necromass is an important stock of carbon in tropical forests. We estimated volume, density, and mass of fallen and standing necromass in undisturbed and selectively logged forests at Juruena, Mato Grosso, Brazil (10.48°S, 58.47°W). We also measured standing dead trees at the Tapajos National Forest, Para, Brazil (3.08°S, 54.94°W) complementing our earlier study there on fallen necromass. We compared forest that was selectively logged using reduced-impact logging methods and undisturbed forest. We estimated necromass density accounting for void volume for necromass greater than 10 cm diameter at Juruena for five decay classes that ranged from freshly fallen (class 1) to highly decayed material (class 5). Average necromass density adjusted for void space (±S.E.) was 0.71 (0.02), 0.69 (0.04), 0.60 (0.04), 0.59 (0.06), and 0.33 (0.05) Mg m&#8722;3 for classes 1 through 5, respectively. Small (2?5 cm) and medium (5?10 cm) size classes had densities of 0.52 (0.02) and 0.50 (0.04) Mg m&#8722;3, respectively. The average dry mass (±S.E.) of fallen necromass at Juruena was 44.9 (0.2) and 67.0 (10.1) Mg ha&#8722;1 for duplicate undisturbed and reduced impact logging sites, respectively. Small and medium sized material together accounted for 12?21% of the total fallen necromass at Juruena. At Juruena, the average mass of standing dead was 5.3 (1.0) Mg ha&#8722;1 for undisturbed forest and 8.8 (2.3) Mg ha&#8722;1 for forest logged with reduced impact methods. At Tapajos, standing dead average mass was 7.7 (2.0) Mg ha&#8722;1 for undisturbed forest and 12.9 (4.6) Mg ha&#8722;1 for logged forest. The proportion of standing dead to total fallen necromass was 12?17%. Even with reduced impact harvest management, logged forests had approximately 50% more total necromass than undisturbed forests.
Palavras-Chave: | Registro de impacto reduzido.
Thesagro: | Densidade da Madeira; Floresta Tropical.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (54064-1) - UPC - AP - DD -  -  -  - DIS