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Peat collapse and vegetation shift at Hickory Point

Metadata Updated: July 6, 2024

This work captures a multi-year progression from 2013 to 2021 of change in the height of the topographic surface and freshwater status of the rooting zone that may indicate impending vegetation transition. Two Surface Elevation Tables (SETs) in a tidal Taxodium distichum swamp at Hickory Point State Forest near Pocomoke City, Maryland were used to collect data on the height of the topographic surface established with respect to a local vertical datum. Annual root production over time was measured by collecting data on ingrowth into mesh root bags. Root bags were collected at 5 set locations within the study area and analyzed to determine the weight in grams of new root production per meter cubed each year. This project also uses data from a CTD DIver probe in a well located next to one of the SETs in the study site 48 cm below soil level. The data also documents the depth, salinity, and pH of the water as well as the vegetation found in the freshwater swamps of Hickory Point. In 2013 five Taxodium distichum trees along a 125 m long transect were outfitted with dendrobands. Each year the growth of the T. distichum trees was measured in terms of the ratio of that year's circumference to the previous year's circumference. Tree growth was measured until the year the tree died or the conclusion of the study in 2021. In November of 2021, the height, density, and species richness of all tree species were recorded in five plots along a 175 m transect. This data was divided into catagories depending on if the tree was alive, dead, or a sapling. Emergent species' height, density, and richness was also recorded.

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/a9adfc58bc4259a63e00427dca2e3104
Identifier USGS:63626cb9d34ebe442506b3b6
Data Last Modified 20221116
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 773280e7-d2db-443d-b642-032ded399307
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -75.6952,37.9832,-75.5949,38.0833
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 1646ebfe6209cba8439e363d34b1836e7ce33901a7ab3ccb31f9780f9190c1b2
Source Schema Version 1.1
Spatial {"type": "Polygon", "coordinates": -75.6952, 37.9832, -75.6952, 38.0833, -75.5949, 38.0833, -75.5949, 37.9832, -75.6952, 37.9832}

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