A5070712349- Insect and Arachnid Ecology and Behavior
- Species Distribution and Climate Change
- Plant and animal studies
- Ecology and biodiversity studies
- Animal and Plant Science Education
- Wildlife Ecology and Conservation
- Amphibian and Reptile Biology
- Animal Vocal Communication and Behavior
- Wildlife-Road Interactions and Conservation
- Marine animal studies overview
- Ecology and Vegetation Dynamics Studies
- Animal Ecology and Behavior Studies
- Bat Biology and Ecology Studies
- Archaeology and Natural History
- Botany and Plant Ecology Studies
United States Geological Survey
2010-2023
Western Ecological Research Center
2010-2022
We investigated the effect of broad-scale wildfire on ground foraging ants within southern California. In October and November 2003, two wildfires burned large portions wildlands San Diego County. Between January 2005 September 2006, we surveyed 63 plots across four sites to measure fires ant assemblages present in vegetation types: 1) coastal sage scrub, 2) chaparral, 3) grassland, 4) woodland riparian. Thirty-six were sampled before between March 2001 June 2003. Mixed model regression...
Abstract: In the United States multispecies habitat conservation plans were meant to be solution conflicts between economic development and protection of biological diversity. Although now widely applied, questions exist concerning scientific credibility planning process effectiveness plans. We used ants assess performance one first regional developed in States, Orange County Central‐Coastal Natural Community Conservation Plan (NCCP), meeting its broader objectives biodiversity...
Migratory amphibians are at high risk of negative impacts when roads intersect their upland and breeding habitats. Road mortality can reduce population abundance, survivorship, breeding, recruitment, probability long-term persistence. Increasingly, environmental planners recommend installation under-road tunnels with barrier fencing to direct towards the passages. Often, permeability these passage systems amphibian movements unknown. We studied California tiger salamanders (CTS: Ambystoma...
Prolonged drought due to climate change has negatively impacted amphibians in southern California, U.S.A. Due the severity and length of current drought, agencies researchers had growing concern for persistence arroyo toad (Anaxyrus californicus), an endangered endemic amphibian this region. Range-wide surveys species not been conducted at least 20 years. In 2017-2020, we collaborative toads historical locations. We surveyed 88 115 total sites having records confirmed that is currently...
Non-native species having high per capita impacts in invaded communities are those that modulate resource availability and alter disturbance regimes ways biologically incompatible with the native biota. In areas where it has been introduced by humans, American beaver ( Castor canadensis ) is an iconic example of such due to its capacity trophic dynamics entire ecosystems create new invasional pathways for other non-native species. The problematic several watersheds within Southern...
The invasiveness of nonnative taxa can vary across a landscape due to environmental gradients, suggesting that location-dependent management strategies may be more effective at reducing spread compared “one size fits all” approach the entire introduced range. Using bait stations placed along linear transects within habitat preserves, we tested for effects ecoregion, vegetation, soil moisture, edge type (i.e., moisture source), and distance from edges on presence invasive Argentine ant...
First posted October 22, 2019 For additional information, contact: Director, Western Ecological Research CenterU.S. Geological Survey3020 State University DriveModoc Hall, Room 4004Sacramento, California 95819 Track tubes are used to identify small animals by their tracks. Animals that enough fit into the walk over ink pads and onto cardstock paper obtain bait within tube, leaving footprints. The tracking described in this document designed be set on ground with free access exit at either...
Climate change and prolonged drought have negatively impacted amphibians in southern California, U.S.A. Due to the severe from 2012–2016, agencies researchers had growing concern for persistence of arroyo toad ( Anaxyrus californicus ), an endangered endemic amphibian this region. Range-wide surveys species not been conducted at least 20 years. In 2017–2020 we collaborative toads historical locations. We surveyed 87 115 total sites having records confirmed that is currently extant 60 19 25...