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Lewis and Clark National Historical Park Forest Restoration Dataset

Published by National Park Service | Department of the Interior | Catalog Last Checked: August 09, 2026 at 11:00 PM | Dataset Last Updated: August 07, 2026 at 12:00 AM
This dataset contains forest monitoring data collected from 57 permanent 20x20 meter plots within the Fort Clatsop Unit of Lewis and Clark National Historical Park (LEWI), Oregon. Plots were surveyed approximately every five years beginning in 2012 to evaluate the effectiveness of LEWI's forest restoration treatments designed to promote late-successional forest characteristics in acquired industrial timber stands. Ten plots were designated as untreated controls, while the remaining 47 plots received restoration treatments including variable density thinning, snag creation, and native species planting. These treatments were implemented to increase forest structural complexity, improve ecosystem function, and accelerate the development of old-growth characteristics in historically managed forest stands. Data collected at the time of each visit serves as a method to evaluate changes in forest structure over time and determine the effectiveness of LEWI's treatments in promoting the development of late-successional characteristics. Data collected include measurements of forest structure, such as overstory density, tree species and DBH, understory vegetation composition and diversity, coarse woody debris and standing dead wood habitat, and woody tree recruitment.

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Complete Metadata
@type dcat:Dataset
accessLevel public
bureauCode 
[
  "010:24"
]
contactPoint 
{
  "fn": "NPS IRMA Help",
  "@type": "vcard:Contact",
  "hasEmail": "mailto:NRSS_DataStore@nps.gov"
}
description This dataset contains forest monitoring data collected from 57 permanent 20x20 meter plots within the Fort Clatsop Unit of Lewis and Clark National Historical Park (LEWI), Oregon. Plots were surveyed approximately every five years beginning in 2012 to evaluate the effectiveness of LEWI's forest restoration treatments designed to promote late-successional forest characteristics in acquired industrial timber stands. Ten plots were designated as untreated controls, while the remaining 47 plots received restoration treatments including variable density thinning, snag creation, and native species planting. These treatments were implemented to increase forest structural complexity, improve ecosystem function, and accelerate the development of old-growth characteristics in historically managed forest stands. Data collected at the time of each visit serves as a method to evaluate changes in forest structure over time and determine the effectiveness of LEWI's treatments in promoting the development of late-successional characteristics. Data collected include measurements of forest structure, such as overstory density, tree species and DBH, understory vegetation composition and diversity, coarse woody debris and standing dead wood habitat, and woody tree recruitment.
distribution 
[
  {
    "@type": "dcat:Distribution",
    "title": "Recruitment.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Counts of tree stems < 2.5 centimeters in diameter at breast height (1.4 meters) rooted within a subplot.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761223?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "TreatmentTypes.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Description of treatment types applied to thinned monitoring plots.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761227?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "LEWI_Forest_Restoration_metadata.xml",
    "format": "xml",
    "mediaType": "application/xml",
    "description": "EML Metadata",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761228?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Subplot.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Lookup table containing subplot codes and descriptions.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761225?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "DecayClass.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Lookup table for decay class codes and descriptions.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761216?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "ProjectTaxa.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Lookup table for species code of all taxa included in dataset",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761222?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "CoarseWoodyDebris.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Measurements of coarse woody debris  along the northern and eastern transects of the plot.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761214?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "HerbaceousCover.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Measurements of herbaceous plant percent cover within five subplots (center, northeast, northwest, southeast, southwest).",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761219?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "CornerTrees.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Measurements of live trees >= 2.5 centimeters at 1.4 meters height closest to each plot corner.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761215?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Locations.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Plot location data.  Plots are 20m^2.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761221?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Events.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Sampling event data for each plot visit.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761217?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "StandingDeadWood.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Species and diameters at 1.4 meters of all standing dead wood >= 20 centimeters and taller than 2 meters within the 20 meter x 20 meter plot.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761224?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "InteriorTrees.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Species and diameters at 1.4 meters of all woody stems >= 2.5 centimeters within the 20 meter x 20 meter plot.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761220?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "ForestOverstoryDensity.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Tree canopy cover density measurements at plot centers, or if the plot center is obscured by understory vegetation, then a selected location from plot center.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761218?Reference=2319292"
  },
  {
    "@type": "dcat:Distribution",
    "title": "Treatments.csv",
    "format": "csv",
    "mediaType": "text/csv",
    "description": "Year(s) plots received thinning treatment.",
    "downloadURL": "https://irma.nps.gov/DataStore/DownloadFile/761226?Reference=2319292"
  }
]
identifier http://datainventory.doi.gov/id/dataset/NPS_DataStore_2319292
issued 2026-08-07T00:00:00Z
keyword 
[
  "Astoria",
  "Field inventory and monitoring",
  "LEWI",
  "Lewis and Clark National Historical Park",
  "Long-term ecological monitoring",
  "NCCN",
  "North Coast and Cascades Network",
  "Oregon",
  "biota",
  "coarse woody debris",
  "community structure",
  "diameter at breast height",
  "disturbance patterns",
  "ecosystem ecology",
  "forest disturbance",
  "forest dynamics",
  "forest ecology",
  "forest ecosystems",
  "forest floor",
  "habitat alteration and disturbance",
  "human disturbance",
  "old growth forests",
  "permanent plots",
  "plant cover",
  "plant species composition",
  "plot sampling",
  "recovery",
  "reference stands",
  "resource management",
  "revegetation",
  "seedling establishment",
  "species composition",
  "thinning",
  "timber harvest",
  "transect sampling",
  "tree age",
  "tree growth",
  "tree mortality",
  "understory vegetation"
]
landingPage https://irma.nps.gov/DataStore/Reference/Profile/2319292
license https://creativecommons.org/publicdomain/zero/1.0/deed.en
modified 2026-08-07T00:00:00Z
programCode 
[
  "010:118",
  "010:119"
]
publisher 
{
  "name": "National Park Service",
  "@type": "org:Organization"
}
spatial -124.0828,45.9841,-123.8515,46.3025
temporal 2012-06-27/2026-07-03
theme 
[
  "Data Package"
]
title Lewis and Clark National Historical Park Forest Restoration Dataset

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