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oai:mercury-ops2.ornl.gov:ornldaac_475 2017-01-20T09:44:55Z ORNLDAAC

NPP_JHN NPP Tropical Forest: John Crow Ridge, Jamaica, 1974-1978, R1 TANNER, E.V.J.; GRUBB, P.J. NPP Tropical Forest: John Crow Ridge, Jamaica, 1974-1978, R1 2013 Oak Ridge, Tennessee, U.S.A. Oak Ridge National Laboratory Distributed Active Archive Center Online Files doi:10.3334/ORNLDAAC/475 475

ABSTRACT: This data set contains five NPP data files and three climate data files (ASCII .txt format). There is one NPP file for each of the five sub-types of upper montane tropical forest located along John Crow Ridge in the Blue Mountains of Jamaica. Biomass, productivity, tree mortality, standing crop of litter, LAI, and nutrient content of leaf fall were measured from 1974 to 1978. Long-term climate data are available from Cinchona Botanic Gardens, approximately 3 km south of the John Crow Ridge study area and at similar elevation. The John Crow Ridge study areas (18.08 N 76.65 W) consist of 8 to 10 contiguous 10 m x 10 m permanent plots. The forests are of low stature and appear to be completely undisturbed. The forest floor at one sub-site (Mor Ridge) was overlain by a 30-50 cm layer of mor humus with a high C/N ratio. ANPP was estimated to be between 654-997 g/m2/year (sum of litterfall and trunk/branch increment), or 854-1,057 g/m2/year (including tree mortality). These figures are lower than for lowland tropical forests with greater leaf turnover and reflect the relatively low stature of the upper montane forest plots. Above-ground biomass was estimated by both destructive methods and nondestructive regression analysis. Values ranged from 23,000 to 34,000 g/m2. Below-ground biomass (5,370 g/m2) was determined for one site by harvesting roots to a depth of 50 cm. LAI for trees plus understory, where measured, was 5.5-5.7 m2/m2.

1871-01-01 1983-03-31 COMPLETE 18.08 18.08 -76.65 -76.65 ESIP Earth Science Information Partners Program EOSDIS Earth Observing System Data Information System TECHNICAL CONTACT ORNL DAAC User Services ORNL DAAC USER SERVICES OFFICE OAK RIDGE NATIONAL LABORATORY OAK RIDGE, TENNESSEE 37831 USA DIF AUTHOR ORNL DAAC User Services ornldaac@ornl.gov (865) 241-3952 (865) 574-4665

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Oak Ridge Tennessee 37831-6407 USA EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS EARTH SCIENCE BIOSPHERE ECOLOGICAL DYNAMICS ECOSYSTEM FUNCTIONS EARTH SCIENCE BIOSPHERE VEGETATION BIOMASS BALANCE FIELD INVESTIGATION EARTH SCIENCE STEEL MEASURING TAPE FIELD INVESTIGATION EARTH SCIENCE CORING DEVICES FIELD INVESTIGATION EARTH SCIENCE QUADRATS FIELD INVESTIGATION EARTH SCIENCE NPP EOSDIS GET DATA http://daac.ornl.gov/cgi-bin/dsviewer.pl?ds_id=475 VIEW RELATED INFORMATION https://daac.ornl.gov//NPP/guides/NPP_JHN.html NPP Tropical Forest: John Crow Ridge, Jamaica, 1974-1978, R1 USA/NASA ENGLISH GCMD CEOS IDN DIF VERSION 9.0