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    • NPP Tropical Forest: John Crow Ridge, Jamaica, 1974-1978, R1

    Metadata Updated: December 3, 2024

    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.

    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 September 27, 2023
    Metadata Updated Date December 3, 2024

    Metadata Source

    Harvested from NASA Data.json

    Other Data Resources

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    Additional Metadata

    Resource Type Dataset
    Metadata Created Date September 27, 2023
    Metadata Updated Date December 3, 2024
    Publisher ORNL_DAAC
    Maintainer
    Identifier C2751945511-ORNL_CLOUD
    Data First Published 2013-09-13
    Language en-US
    Data Last Modified 2024-11-27
    Category NPP, 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 Tanner, E.V.J., and P.J. Grubb. 2013. NPP Tropical Forest: John Crow Ridge, Jamaica, 1974-1978, R1. ORNL DAAC, Oak Ridge, Tennessee, USA. http://dx.doi.org/10.3334/ORNLDAAC/475
    Graphic Preview Description Browse Image
    Graphic Preview File https://daac.ornl.gov/graphics/browse/project/square/npp_logo_square.png
    Harvest Object Id cc35f93d-fc88-42da-8d22-2786f0888554
    Harvest Source Id 58f92550-7a01-4f00-b1b2-8dc953bd598f
    Harvest Source Title NASA Data.json
    Homepage URL https://doi.org/10.3334/ORNLDAAC/475
    Metadata Type geospatial
    Old Spatial 18.08 -76.65
    Program Code 026:001
    Source Datajson Identifier True
    Source Hash 4f433fc40daf60e8feb67b358c4bd8074239755cd12c8923adf8ec4aec57a0d1
    Source Schema Version 1.1
    Spatial
    Temporal 1871-01-01T00:00:00Z/1983-03-31T23:59:59Z

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