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Western Pond Turtle (Actinemys marmorata) Monitoring and Assessment Data from the Trinity River, California (2013-2017)

Metadata Updated: October 29, 2023

A key objective of the Trinity River Restoration Program (TRRP) is maintaining and enhancing other wildlife populations through the restoration initiatives. For herpetological species, the foothill yellow-legged frog and western pond turtle have been identified as important species on which to focus monitoring efforts due to their status as California state-listed Species of Concern. As a result, considerable prior effort has focused on understanding the distribution and demography of these species, both on the main Trinity River and on the South Fork Trinity River as a comparison population (potentially representing pre-dam population status). These studies have highlighted differences in life-history traits of each species between the two rivers that may be due to conditions of the main Trinity River. For western pond turtle these traits include slow growth rates, smaller adult sizes, lower annual fecundity, and later age at maturity in comparison to South Fork Trinity River and other western pond turtles in the region. For foothill yellow-legged frogs, densities of egg masses are an order of magnitude lower on the main Trinity River in comparison to the South Fork Trinity River. Egg masses on the main Trinity River are also vulnerable to scour depending on the timing and volume of water released from the dam. TRRP is working to address these issues by including consideration of the impacts of water management decisions on these species, as well as taking habitat requirements into account in their channel rehabilitation work that is geared towards improving salmonid rearing habitat.

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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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Geological Survey
Identifier USGS:5cc23843e4b09b8c0b7471e5
Data Last Modified 20211116
Category geospatial
Public Access Level public
Bureau Code 010:12
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Harvest Object Id c6de6b89-6c20-4eab-9723-135b373cbea9
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Metadata Type geospatial
Old Spatial -123.121479,40.648441,-122.822256,40.76768
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Geological Survey
Source Datajson Identifier True
Source Hash 5b28ecf2e5e9edbafbcc2286c6a48ba3e68c52edc0b5365186ad96fe5bbfe6aa
Source Schema Version 1.1
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