Richard Brock - Manager, Botany, Ecology, GIS

Richard Callagan - Manager, Botany, Ecology, Seed Collecting

Greg Carey - Botany, Ecology, Seed Collecting, Restoration, Canopy Science

Gretchen Vos - Botany, Ecology, Wildlife Surveys, NEPA

Mark Harris - Botany, Ecology, Forest Science

Jason Clark - Botany, Ecology, Wetlands Science, GIS, Restoration

John Villella - Botany, Senior Lichenologist, Mycologist


Siskiyou BioSurvey is a team of dedicated botanists and ecologists with a long history of effective cooperation, friendship, and a love for their work.

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Richard Brock - Manager
Richard Brock has more than 30 years working in the forests of Oregon, Washington, and Northern California. His experience includes managing and conducting botanical field surveys, fungi surveys, project design and GIS, ecosystem inventory and assessment, plant ecology research, public lands planning, forest management, rangeland monitoring, forest science, and wildlife inventories. He has personally conducted botanical surveys on over 85,000 acres in 27 years on federal and private lands. As a project manager for SBS, he has guided field crews on large-scale complex surveys for federal agencies and private land owners in a region known for its high species diversity and endemism. Mr. Brock is intimately familiar with the flora of Oregon and is regarded as an authority on the taxonomy and ecology of Southwest Oregon's rare and sensitive plant species. He was certified for his expertise with lichens west of the Cascade Mountains by the Northwest Lichenologists in 2009.

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Richard Callagan - Manager
Richard Callagan has 39 years experience working in the forests of Oregon, Washington, and Northern California. Prior to joining SBS, Mr. Callagan spent over 20 years as a sole proprietor environmental consultant with extensive expertise in botanical and forest management projects. His expertise in field botany has made him an authority on the taxonomy and ecology of Southwest Oregon's rare and sensitive plant species. He also has a long history conducting surveys for non-vascular species and fungi. Mr. Callagan also brings forest and plant ecology experience to the SBS team, including ecosystem inventory and assessment, rangeland analysis and inventory, native seed collection, forest management, and wildlife inventories. As a project manager and coordinator for SBS, he coordinates and supervises field crews, manages and tracks project data, and provides consistent communication with a range of clients.

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Greg Carey - Botany, Ecology, Canopy Research, Landscape Restoration, Seed Collecting
Greg Carey has over 30 years working in the forests of Oregon, Washington, Idaho, Colorado, Alaska, and Northern California. He has 18 years of field experience as a field botanist and ecologist. He is intimately familiar with the flora of Oregon, Washington, and Northern California and has an extensive experience conducting noxious weed inventories, sensitive and listed vascular and non-vascular plant surveys, fungi surveys, and classifying and mapping plant communities on a landscape scale. Mr. Carey also brings professional horticulture and landscape restoration expertise to the SBS team. He is an authority on native seed collection and plant propagation. As a sole proprietor and as member of SBS, he has provided native seed for over 30 years to federal and private land owners, as well as designing and implementing restoration projects for state departments of transportation, municipalities, and private landowners.

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Gretchen Vos - Botany, Ecology, Wildlife Surveys, NEPA
Gretchen Vos has over 20 years experience as a field botanist and biologist in the Pacific Northwest and Northern California regions. She has particular expertise in the flora of Southern Oregon, an area known for its high species diversity and endemism. Ms. Vos is highly qualified to conduct sensitive and rare plant surveys, noxious weed inventories, fungi surveys, and plant community mapping in Oregon, Washington, and Northern California. She has conducted non-vascular surveys since 1999 and was certified for her expertise with lichens west of the Cascade Mountains by the Northwest Lichenologists in 2009. Prior to coming to SBS, she had extensive wildlife survey experience throughout the West Coast, and has worked with Northern Spotted Owls, Northern Goshawks, and federally listed large branchiopods and amphibians. As a consulting biologist in Northern California, she supervised complex large-scale botanical and biological survey projects, and developed land use management plans.

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Mark Harris - Botany, Ecology, Forest Science
Mark Harris has over 30 years working in the forests of Oregon, Washington, and Northern California. He is intimately familiar with the flora of the Oregon and Northern California, and has years of experience conducting botanical surveys. He has been conducting non-vascular surveys for fungi, lichens, and bryophytes since 1999. Mr. Harris also brings professional reforestation expertise to the SBS team. As a sole proprietor contractor, he has 31 years experience managing contracts with private timber companies in the Southern Oregon region, providing tree planting, plantation management, cone collection, stocking surveys, and stand exams. Mark heads up our forest and fuels monitoring team and manages FireMon contracts, which collect forest condition data before and after fuels treatments.

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Jason Clark - Botany, Ecology, Wetlands Science, Restoration
Jason Clark has worked as a botanist, plant ecologist, and wetland scientist for 12 years. He has conducted rare vascular, non-vascular, and fungi surveys, mapped plant communities, and gathered ecological data in a wide variety of ecotypes in Oregon, Washington, and Northern California. He was certified for his expertise with lichens west of the Cascade Mountains by the Northwest Lichenologists in 2009. He regularly manages projects, coordinates field crews, and provides consistent communication with a variety of clients and team members. He has consulted with landowners and public lands managers on ecological restoration objectives and fuels management issues, designed restoration and monitoring plans, and conducted numerous site assessments and evaluations. He also conducts ecological monitoring in forests, rangelands, restoration and wetland mitigation sites, and has written restoration and wetland mitigation plans. He regularly utilizes GPS and GIS technologies to map ecological features, support project planning, and produce geographic deliverables.

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John Villella - Botany, Senior Lichenologist, Mycologist
John Villella has 14 years experience consulting as a rare plant and non-vascular botanist and mycologist on BLM and Forest Service lands in Alaska, Oregon, Washington, and California. During this time, he has been responsible for training and leading surveys crews, producing and editing reports, and managing projects. Mr. Villella has worked on a variety of different types of projects including timber and rangeland management, dam re-licensing, and ecological research including forest canopy surveys. He has also worked in the academic field using his botanical expertise to instruct for several colleges and non-profit educational organizations. Mr. Villella has particular expertise in the Pacific Northwest bryophyte, fungi, and lichen flora, with a special interest in crustose lichens. He was certified for his expertise with macrolichens west of the Cascade Mountains by the Northwest Lichenologists in 2004. He serves on the board of directors of the Northwest Scientific Association and is the Editor of the Bulletin of the California Lichen Society.

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