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Biological Studies

Designing and conducting surveys with the end goal in mind.

Our team designs studies to help you get the information you really need. Since no two projects are alike, we efficiently evaluate every project to determine the right level of effort needed to inform project decisions. Ascent’s Natural Resources practice uses our full suite of wildlife biology and botany capabilities to support environmental decision making and stewardship of land and water resources. Our work supports natural resource and outdoor recreation planning and management, CEQA and NEPA documents, regulatory compliance, and monitoring during project implementation.

  • Habitat assessments
  • Wildlife and botanical surveys
  • Aquatic resource delineations
  • Invasive weed risk assessment
  • GIS modeling and analysis
  • Conservation and mitigation strategies
  • Natural resources management planning
  • Biological mitigation monitoring
Davis, California
Nesting Bird and Roosting Bat Guidance Document
Humboldt-Toiyabe National Forest, Nevada
Kyle Canyon Biological Surveys
Rancho Cordova, California
Prairie City SVRA Aquatic Resources Delineation
Stanislaus National Forest, California
Botanical Field Surveys, SERAL and Cedar Ridge Fuels Project

Tammie Beyerl
Senior Botanist and Wetland Ecologist
(Northern California)


Steve Henderson
Senior Wildlife Biologist
(Sierra Nevada)


Scott Gressard
Director of Biological Services
(Southern California)


  • California Department of Fish and Wildlife
  • California Department of Forestry and Fire Protection
  • California State Parks
  • California Department of Corrections and Rehabilitation
  • California Department of General Services
  • California Tahoe Conservancy
  • California Wildlife Foundation
  • City of Sacramento
  • City of South Lake Tahoe
  • Midpeninsula Regional Open Space District
  • NV Energy
  • County of Napa
  • North Tahoe Public Utilities District
  • Sacramento Area Flood Control District
  • County of Sacramento
  • Sacramento Regional County Sanitation District
  • Santa Clara Valley Open Space Authority
  • Sierra Nevada Conservancy
  • Stanislaus National Forest
  • Tahoe City Public Utilities District
  • Tahoe National Forest
  • Tahoe Regional Planning Agency
  • Tahoe Resource Conservation District
  • Tahoe Transportation District
  • County of Tuolumne
  • UC Davis
  • Vail Resorts
  • County of Yolo
  • Yuba Water Agency
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