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LBA-ECO CD-08 Coarse Wood Litter Respiration and Decomposition, Manaus, Brazil

Metadata Updated: December 6, 2023

This data sets contains data on coarse wood density, moisture content, respiration rates and decomposition rate constants in csv format from Manaus Brazil measured from 1/1/1996 through 12/31/1997. The data for respiration reports CO2 flux from coarse litter (trunks and large branches > 10 cm diameter) that was studied in central Amazon forests (Chambers et al. 2001). The respiration study took place during the transition from wet to dry season of 1997 (June-August),and sampling from the decomposition study (Chambers et al. 2000) was carried out during both the dry and wet seasons of 1996-97 (see below). Respiration rates varied over almost two orders of magnitude (1.003-0.014 micro g C g-1 C min-1, n=61), and were significantly correlated with wood density (r2adj = 0.42), and moisture content (r2adj = 0.39). Additional samples taken from a nearby pasture indicated that wood moisture content was the most important factor controlling respiration rates across sites (r2adj = 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).Decomposition rate constants are reported as mass loss fraction per year, for boles of 155 large dead trees (> 10 cm diameter) in central Amazon forests (Chambers et al. 2000). The measurements were carried out over a 2-year period (1996-1997) on permanent plots monitored by the Biological Dynamics of Forest Fragments Project (BDFFP) of the Smithsonian Institution (Lovejoy and Bierregaard 1990; Rankin-De Merona et al. 1992) and the Biomass and Nutrient Experiment (BIONTE) of the National Institute for Amazon Research (Instituto Nacional de Pesquisas da Amazonia-INPA). Mortality data from 21 hectares of permanent inventory plots, monitored for 10-15 years, were used to select dead trees for sampling. A single csv formatted data file includes dates when trees died, their diameter and breast height (DBH, i.e., at 1.3 m) and taxonomic information.Measured rate constants varied by over 1.5 orders of magnitude (0.015-0.67 /yr), averaged 0.19 /yr with predicted error averaging 0.026 /yr. Wood density and bole diameter were significantly and inversely correlated with rate constants. A tree of average biomass was predicted to decompose at 0.17 /yr.Understanding how tropical forest carbon balance will respond to global change requires knowledge of individual heterotrophic and autotrophic respiratory sources, together with factors that control respiratory variability. These data, along with estimates of ecosystem leaf, live wood and soil respiration, were used to estimate total carbon balance as described in Chambers et al (2004).

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Dates

Metadata Created Date October 11, 2023
Metadata Updated Date December 6, 2023

Metadata Source

Harvested from NASA Data.json

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Additional Metadata

Resource Type Dataset
Metadata Created Date October 11, 2023
Metadata Updated Date December 6, 2023
Publisher ORNL_DAAC
Maintainer
Identifier C2777409227-ORNL_CLOUD
Data First Published 2023-10-03
Language en-US
Data Last Modified 2023-10-04
Category LBA-ECO, geospatial
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Citation Chambers, J.Q., J.P. Schimel, A.D. Nobre, N. Higuchi, L.V. Ferreira, J.M. Melack, and S.E. Trumbore. 2009. LBA-ECO CD-08 Coarse Wood Litter Respiration and Decomposition, Manaus, Brazil. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/911
Graphic Preview Description Browse Image
Graphic Preview File https://daac.ornl.gov/graphics/browse/project/square/lba_logo_square.png
Harvest Object Id a2c18736-30db-4bd1-a281-cfff439deede
Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
Harvest Source Title NASA Data.json
Homepage URL https://doi.org/10.3334/ORNLDAAC/911
Metadata Type geospatial
Old Spatial -60.21 -2.61 -60.12 -2.59
Program Code 026:001
Source Datajson Identifier True
Source Hash 9919915f9c5da5aaf79c3cc23e5e6309545e314906908ab29a47d328dcc7aff6
Source Schema Version 1.1
Spatial
Temporal 1996-07-01T00:00:00Z/1997-08-31T23:59:59Z

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