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NPP Tropical Forest: Chamela, Mexico, 1982-1995, R1

Data Set Overview

Data setNPP Tropical Forest: Chamela, Mexico, 1982-1995, R1
Release date2013-09-13
ProjectNet Primary Productivity (NPP)
Time Period1982-01-01 to 1999-10-31


This data set contains five data files (.txt format). Three data files provide net primary productivity (NPP) estimates for a tropical dry deciduous forest within the 3,300-ha Chamela Biological Station, Mexico. There is one file for each of the three permanent watershed plots located along an elevational gradient from 60 to 160-m above sea level. NPP was estimated from field measurements obtained during wet and dry seasons between 1982 and 1995. A fourth NPP data file provides average nutrient fluxes into and out of five watersheds. The fifth file provides precipitation and minimum/maximum temperature data from measurements obtained onsite. Detailed data are available for above-ground NPP (ANPP) (fine litterfall, wood increment, and leaf herbivory plus an estimation of understory production), and below-ground NPP (BNPP) (fine root production and root increment). Biomass data and nutrient inputs/outputs (P, K, Ca, Mg) averaged from five watersheds are also included in the data set. Estimated ANPP ranged from 611 to 808 g/m2/year between the three sub-sites (average 682 g/m2/year), and total NPP ranged from 1,119 to 1,353 g/m2/year (average 1,206 g/m2/year). These estimates are thought to represent the lower bounds of NPP because root and stem herbivory have not been taken into account, although leaf herbivory is included. Revision Notes: Only the documentation for this data set has been modified. The data files have been checked for accuracy and are identical to those originally published in 2001.


Data set reference document


Maass, M., and A. Martinez-Yrizar. 2013. NPP Tropical Forest: Chamela, Mexico, 1982-1995, R1. ORNL DAAC, Oak Ridge, Tennessee, USA.
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Net Primary Productivity (NPP): NPP (net primary production) data from existing field measurements are being compiled for approximately 100 study sites covering several major world ecosystem types. These data are used by global change modelers to develop and validate models of vegetation-soil-atmosphere interactions within the global carbon cycle and to help calibrate remote sensing of vegetation worldwide

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Companion Files

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  • NPP_CHM.pdf

Data Files

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Data File (Granule)File SizeDates
chm1_npp.txt 3.3 KB 1982-06-01 - 1992-05-31
chm2_npp.txt 3.9 KB 1982-06-01 - 1992-05-31
chm3_npp.txt 3.3 KB 1982-01-01 - 1995-12-31
chm4_npp.txt 6.9 KB 1982-01-01 - 1995-12-31
chm_cli.txt 8.0 KB 1983-01-01 - 1999-10-31


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