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This dataset includes tables with physical information and isotopic data that are used to calculate uranium-series ages (230Th/U method) and initial 234U/238U activity ratios on a suite of mastodon bones from the Cerutti Mastodon site near San Diego, CA area.
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We surveyed for Least Bell’s Vireos (Vireo bellii pusillus; vireo) and Southwestern Willow Flycatchers (Empidonax traillii extimus; flycatcher) along the San Luis Rey River, between College Boulevard in Oceanside and Interstate 15 in Fallbrook, California (middle San Luis Rey River), in 2021. Surveys were conducted from April 13 to July 14 (vireo) and from May 18 to July 13 (flycatcher). We found 180 vireo territories, at least 125 of which were occupied by pairs. The vireo population size decreased by 6 percent from 2020 to 2021. One resident flycatcher, of undetermined breeding status, was observed in the survey area in 2021. He was detected from May 20 to June 4, 2021, and no evidence of pairing or nesting was...
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Data presented are results of surveys for California gnatcatchers and vegetation sampling conducted in 2015, 2016, and 2020 to address two inter-related questions: (1) How have gnatcatchers and their habitat recovered in areas burned by wildfires in 2003, 2007, and 2014?, and (2) What is the current regional occupancy of gnatcatchers throughout their southern California range? Data for the post-fire study were collected in 2015, 2016, and 2020, while the regional occupancy survey was conducted in 2016, and 2020. In 2015, gnatcatcher occupancy as a function of fire history was derived from 324 points in the following fire categories: 2003-2006 (106 points), 2007-2010 (111 points), and 2011-2014 (107 points). In 2016,...
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Map showing Existing and Proposed Hardline Preserves within the City of Carlsbad Habitat Management Plan and associated Biological Core and Linkage Areas
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Map showing current year and cumulative habitat losses and gains in approved subareas within the Multiple Species Conservation Program and Pre-approved Mitigation Areas.
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Chloropyron maritimum subsp. maritimum population counts at Sweetwater Marsh National Wildlife Refuge, California, and tide and weather data from San Diego, California, are used to explain interannual variation in Chloropyron counts and to predict past population counts.
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The goal of this project was to primarily assess east-west connectivity across Route 67 and secondarily, north-south connectivity across Scripps Poway Parkway and Poway Road, two highly trafficked roads to the west of Route 67. We collected deer scat piles from both sides of these crossings in spring between March and June of 2015, and again in fall throughout October 2015. Collected pellets were extracted and amplified using protocols and loci developed by Bohonak and Mitelberg (2014). DNA fingerprinting results were used to investigate mule deer movement in the region directly by identifying individuals which had been captured multiple times throughout the study period. We also assessed movement indirectly through...


    map background search result map search result map San Diego MSCP Habitat Gains and Losses City of Carlsbad Habitat Management Plan DNA fingerprinting of Southern Mule Deer (Odocoileus hemionus fuliginatus) to determine movement across California State Route 67 U-series isotope data used to date a 130,000-year-old archaeological site in southern California, U.S.A. Chloropyron maritimum subsp. maritimum population counts, tide, and weather data for Sweetwater Marsh National Wildlife Refuge Rangewide Occupancy and Post-Fire Recovery of California Gnatcatchers in Southern California, 2020 Distribution and Abundance of Least Bell's Vireos (Vireo bellii pusillus) and Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Middle San Luis Rey River, San Diego County, Southern California in 2021 U-series isotope data used to date a 130,000-year-old archaeological site in southern California, U.S.A. DNA fingerprinting of Southern Mule Deer (Odocoileus hemionus fuliginatus) to determine movement across California State Route 67 Distribution and Abundance of Least Bell's Vireos (Vireo bellii pusillus) and Southwestern Willow Flycatchers (Empidonax traillii extimus) on the Middle San Luis Rey River, San Diego County, Southern California in 2021 Chloropyron maritimum subsp. maritimum population counts, tide, and weather data for Sweetwater Marsh National Wildlife Refuge City of Carlsbad Habitat Management Plan San Diego MSCP Habitat Gains and Losses Rangewide Occupancy and Post-Fire Recovery of California Gnatcatchers in Southern California, 2020