Artigo

Respiration from coarse wood litter in central Amazon forests

Respiration from coarse litter (trunks and large branches > 10 cm diameter) was studied in central Amazon forests. Respiration rates varied over almost two orders of magnitude (1.003-0.014 μg C g-1 C min-1, n = 61), and were significantly correlated with wood density (radj/2 = 0.42), and moisture...

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Autor principal: Chambers, Jeffrey Quintin
Outros Autores: Schimel, Joshua P., Nobre, Antônio Donato
Grau: Artigo
Idioma: English
Publicado em: Biogeochemistry 2020
Assuntos:
Carbon Cycle
Litter
Moisture Content
Respiration
Woody Debris
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/19129
id oai:repositorio:1-19129
recordtype dspace
spelling oai:repositorio:1-19129 Respiration from coarse wood litter in central Amazon forests Chambers, Jeffrey Quintin Schimel, Joshua P. Nobre, Antônio Donato Carbon Cycle Litter Moisture Content Respiration Woody Debris Respiration from coarse litter (trunks and large branches > 10 cm diameter) was studied in central Amazon forests. Respiration rates varied over almost two orders of magnitude (1.003-0.014 μg C g-1 C min-1, n = 61), and were significantly correlated with wood density (radj/2 = 0.42), and moisture content (radj/2 = 0.39). Additional samples taken from a nearby pasture indicated that wood moisture content was the most important factor controlling respiration rates across sites (radj/2 = 0.65). Based on average coarse litter wood density and moisture content, the mean long-term carbon loss rate due to respiration was estimated to be 0.13 yr-1 (range of 95% prediction interval (PI) = 0.11-0.15 yr-1). Comparing mean respiration rate with mean mass loss (decomposition) rate from a previous study, respiratory emissions to the atmosphere from coarse litter were predicted to be 76% (95% PI = 65-88%) of total carbon loss, or about 1.9 (95% PI = 1.6-2.2) Mg C ha-1 yr-1. Optimum respiration activity corresponded to about 2.5 g H2O g-1 dry wood, and severely restricted respiration to < 0.5 g H2O g-1 dry wood. Respiration from coarse litter in central Amazon forests is comparable in magnitude to decomposing fine surface litter (e.g. leaves, twigs) and is an important carbon cycling component when characterizing heterotropbic respiration budgets and net ecosystem exchange (NEE). 2020-06-15T22:05:38Z 2020-06-15T22:05:38Z 2001 Artigo https://repositorio.inpa.gov.br/handle/1/19129 10.1023/A:1006473530673 en Volume 52, Número 2, Pags. 115-131 Restrito Biogeochemistry
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Carbon Cycle
Litter
Moisture Content
Respiration
Woody Debris
spellingShingle Carbon Cycle
Litter
Moisture Content
Respiration
Woody Debris
Chambers, Jeffrey Quintin
Respiration from coarse wood litter in central Amazon forests
topic_facet Carbon Cycle
Litter
Moisture Content
Respiration
Woody Debris
description Respiration from coarse litter (trunks and large branches > 10 cm diameter) was studied in central Amazon forests. Respiration rates varied over almost two orders of magnitude (1.003-0.014 μg C g-1 C min-1, n = 61), and were significantly correlated with wood density (radj/2 = 0.42), and moisture content (radj/2 = 0.39). Additional samples taken from a nearby pasture indicated that wood moisture content was the most important factor controlling respiration rates across sites (radj/2 = 0.65). Based on average coarse litter wood density and moisture content, the mean long-term carbon loss rate due to respiration was estimated to be 0.13 yr-1 (range of 95% prediction interval (PI) = 0.11-0.15 yr-1). Comparing mean respiration rate with mean mass loss (decomposition) rate from a previous study, respiratory emissions to the atmosphere from coarse litter were predicted to be 76% (95% PI = 65-88%) of total carbon loss, or about 1.9 (95% PI = 1.6-2.2) Mg C ha-1 yr-1. Optimum respiration activity corresponded to about 2.5 g H2O g-1 dry wood, and severely restricted respiration to < 0.5 g H2O g-1 dry wood. Respiration from coarse litter in central Amazon forests is comparable in magnitude to decomposing fine surface litter (e.g. leaves, twigs) and is an important carbon cycling component when characterizing heterotropbic respiration budgets and net ecosystem exchange (NEE).
format Artigo
author Chambers, Jeffrey Quintin
author2 Schimel, Joshua P.
Nobre, Antônio Donato
author2Str Schimel, Joshua P.
Nobre, Antônio Donato
title Respiration from coarse wood litter in central Amazon forests
title_short Respiration from coarse wood litter in central Amazon forests
title_full Respiration from coarse wood litter in central Amazon forests
title_fullStr Respiration from coarse wood litter in central Amazon forests
title_full_unstemmed Respiration from coarse wood litter in central Amazon forests
title_sort respiration from coarse wood litter in central amazon forests
publisher Biogeochemistry
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/19129
_version_ 1787143373668220928
score 11.653393

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