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Brazoria NWR Prairie Resilience Data

Metadata Updated: July 6, 2024

In 1996, 400 tree-centered plots were established by first randomly choosing x- and y- coordinates from an imaginary grid overlaying the study area. Each random point was also randomly assigned a tree-size category from a pre-determined sampling scheme. The scheme was to include 20 trees from each of 5 size categories. Size/height categories were: less than 0.1m, 0.1-1m, 1-2m, 2-3m, and greater than 3.0m. To avoid excessive aggregation of samples, no more than 5 trees in a size class could be chosen within a 100-meter sub-area of the sampling grid. The nearest tree to each random point that met the pre-determined size requirement was identified and marked with a permanent aluminum tag. For the size category less than 0.1m tall, field-collected seedlings were transplanted into plots. Transplanted seedlings were monitored and watered for 2 months prior to pre-burn measurements. Pre-burn measurements included: maximum tree height (using telescoping measuring poles), non-destructive estimation of total community biomass (Whitbeck and Grace 2006), and herbaceous community species composition. Sub-areas within the study area were randomly chosen for burning in either the growing or dormant season. Dormant-season burns were conducted in January 1997 and growing-season burns in August 1997. Prescribed burns were conducted by USFWS fire crews according to normal prescriptions for the area. Plots were resampled immediately following fire to determine burn completeness of plots, as well as for general observations. Effectiveness of fire treatments were assessed at the end of the subsequent growing season (September 1998). At that time, maximum height of trees was remeasured, along with general community characteristics.

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 June 1, 2023
Metadata Updated Date July 6, 2024

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date July 6, 2024
Publisher U.S. Geological Survey
Maintainer
@Id http://datainventory.doi.gov/id/dataset/c74f8d29f00d0e62a79fc50fd1e66cae
Identifier USGS:5addda05e4b0e2c2dd2b7ca2
Data Last Modified 20200830
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://datainventory.doi.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
Harvest Object Id 6304c871-fb3e-4d63-9eb9-64e7c565f47d
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -95.377807617042,28.934233210193,-95.16357421862,29.116756359632
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 239a45270e01996c07b45c607f51cafbbb85907a65471e6587be9df8196bd968
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -95.377807617042, 28.934233210193, -95.377807617042, 29.116756359632, -95.16357421862, 29.116756359632, -95.16357421862, 28.934233210193, -95.377807617042, 28.934233210193}

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