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Ohia Dieback Study - Hawaii Island Canopy Status Assessment Table, 1977 - 2015

Metadata Updated: October 30, 2025

We analyzed very-high-resolution imagery to assess status of Metrosideros polymorpha forests across an 83,603 hectare study area that experienced extensive canopy dieback in the 1970s on the eastern side of the island of Hawaii. Using GIS we generated 1170 virtual vegetation plots with a 100 m radius; 541 plots in areas mapped in 1977 with trees dead or mostly defoliated (dieback), and 629 plots in adjacent wet forest habitat, previously mapped as non-dieback condition. In each plot we estimated the percent of M. polymorpha trees dead or mostly defoliated, and percent of trees with healthy crowns. These results were combined with habitat data to produce a spatial model depicting probability of canopy dieback within the study area. Seventy-nine percent of plots mapped in 1977 in dieback condition recovered their canopy and were now considered in non-dieback condition. Ninety-one percent of plots in previous non-dieback areas were found to still have a healthy M. polymorpha canopy in 2015. This dataset contains the results of the analysis showing the status of the ohia canopy in 1977 and its status from the plot assessment conducted in 2015. Additionally, the dataset contains several covariate variables that were used during the analysis.

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.

Downloads & Resources

Dates

Metadata Created Date September 14, 2025
Metadata Updated Date October 30, 2025

Metadata Source

Harvested from DOI USGS DCAT-US

Additional Metadata

Resource Type Dataset
Metadata Created Date September 14, 2025
Metadata Updated Date October 30, 2025
Publisher U.S. Geological Survey
Maintainer
Identifier http://datainventory.doi.gov/id/dataset/usgs-5c5dfa7ce4b0fe48cb32e7d8
Data Last Modified 2020-08-27T00:00:00Z
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://ddi.doi.gov/usgs-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
Harvest Object Id ac91e856-f7a8-40ba-bb14-1733a447cd4d
Harvest Source Id 2b80d118-ab3a-48ba-bd93-996bbacefac2
Harvest Source Title DOI USGS DCAT-US
Metadata Type geospatial
Old Spatial -155.6850, 19.1360, -154.7534, 20.0290
Source Datajson Identifier True
Source Hash dc7458ebf46a249b7bb669e4070b3346005ea0d9b808b97041d9cabb23ca7ebf
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -155.6850, 19.1360, -155.6850, 20.0290, -154.7534, 20.0290, -154.7534, 19.1360, -155.6850, 19.1360}

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