Author(s): Teixeira L; Chambers J; Higuchi N; dos Santos J; Goulden M; Jardine K; East M
Site ID: BR-Ma2
Site Name: Manaus - ZF2 K34
Variables: Dendrometry; Stem CO2 Efflux
Date Range: Dec. 19, 2001 - Nov. 26, 2002
Description: We explored mechanisms responsible for disturbance-induced shifts in carbon metabolism in forests north of Manaus, Brazil (S2º 38' 17", W60º 09' 25"), using data from a selective logging experiment (BIONTE). BIONTE (the BIOmass and NuTrient Experiment) selective logging treatments were initiated in the mid-1980s and comprised variable removal of commercial tree (not total) species basal area (T1 =32%, T2 = 42%, T3 = 69%), and control plots with no logging (T0). Raw data including tree base diameter (Db), CO2 concentration versus time inside a static stem chamber, and wood density were used to derive stem respiration rates (Rw), wood production rates (Pw), and wood carbon use efficiency (CUE). Changes in tree base diameter (Db; measured at 1.3 m height, or above the buttresses) was used to calculate wood production for individual trees (Pw). Wood density enabled calculation of stem growth rate in the same units as stem respiration (mmol C m-2 s-1). Four trees were randomly selected from five tree growth rate classes for each treatment block, for a total of 20 trees per treatment block, or 80 trees total from the BIONTE plots. Each of the 80 trees selected for the Rw study were outfitted with dendrometer bands (da Silva et al. 2002). Stem respiration was measured using the method described in Chambers et al. (2004). Briefly, an infra-red gas analyzer (LiCor 820) was operated as a closed dynamic chamber with a flow rate of 1.0 L min-1. Polyvinyl chloride (PVC) semi-cylindrical chambers (250–400 mL) were secured to the tree stem near the dendrometer bands using nylon straps. The measurement interval spanned 1–2 min, and the CO2 flux from the stem of each tree was quantified using the enclosed stem area and slope of the stem CO2 concentration versus time. Data is included as text files along with a LiCor 820 manual in PDF format. Also in this dataset is a Metadata folder containing two CSV files with species lists and three metadata files in Excel format that include site, collection, and species information. These Excel files require the use of Microsoft Excel software.
QA/QC: Provisional QA-QC
Methods Description: We explored mechanisms responsible for disturbance-induced shifts in carbon metabolism in forests north of Manaus, Brazil (S2º 38' 17", W60º 09' 25"), using data from a selective logging experiment (BIONTE). BIONTE (the BIOmass and NuTrient Experiment) selective logging treatments were initiated in the mid-1980s and comprised variable removal of commercial tree (not total) species basal area (T1 =32%, T2 = 42%, T3 = 69%), and control plots with no logging (T0). Raw data including tree base diameter (Db), CO2 concentration versus time inside a static stem chamber, and wood density were used to derive stem respiration rates (Rw), wood production rates (Pw), and wood carbon use efficiency (CUE). Changes in tree base diameter (Db; measured at 1.3 m height, or above the buttresses) was used to calculate wood production for individual trees (Pw). Wood density enabled calculation of stem growth rate in the same units as stem respiration (mmol C m-2 s-1). Four trees were randomly selected from five tree growth rate classes for each treatment block, for a total of 20 trees per treatment block, or 80 trees total from the BIONTE plots. Each of the 80 trees selected for the Rw study were outfitted with dendrometer bands (da Silva et al. 2002). Stem respiration was measured using the method described in Chambers et al. (2004). Briefly, an infra-red gas analyzer (LiCor 820) was operated as a closed dynamic chamber with a flow rate of 1.0 L min-1. Polyvinyl chloride (PVC) semi-cylindrical chambers (250–400 mL) were secured to the tree stem near the dendrometer bands using nylon straps. The measurement interval spanned 1–2 min, and the CO2 flux from the stem of each tree was quantified using the enclosed stem area and slope of the stem CO2 concentration versus time.
Access Level: Public
Originating Institution(s): Programa de Pós-Gradução-CFT/INPA
Sponsor Organization(s): NASA LBA- ECO, INPA, US DOE
Contact: Jardine, Kolby - Lawrence Berkeley National Laboratory (kjjardine@lbl.gov)
Version: 1.0
Dataset Citation: Teixeira L; Chambers J; Higuchi N; dos Santos J; Goulden M; Jardine K; East M (2022): Stem CO2 Efflux and growth rates in a selectively logged experiment in Central Amazon, 2001-2002. 1.0. NGEE Tropics Data Collection. (dataset). http://dx.doi.org/10.15486/ngt/1767825
Acknowledgement: This work was supported by research infrastructure and personnel of INPA in Manaus, Brazil; NASA LBA- ECO (CD-34, CD-08, and CD-04), and the Next Generation Ecosystem Experiments-Tropics (NGEE-Tropics) funded by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research through contract No. DE-AC02-05CH11231 to LBNL, as part of DOE‟s Terrestrial Ecosystem Science Program.
Data Link: Download Dataset
Teixeira L, Chambers J, Tribuzy E, dos Santos J, Goulden M, Trumbore S, East M, Jardine K and Higuchi N (2021) Carbon Use Efficiency of Wood Production in an Old-Growth Amazon Forest, in prep.
