22333 – Assessment of Sensitive Amphibians in Southwest Oregon (State – Federal Partnership)

Investigator’s Annual Reports (IAR’s) for Crater Lake National Park

Assessment of Sensitive Amphibians in Southwest Oregon (State – Federal Partnership)


Report Number: 22333

Permit Number: CRLA-2001-SCI-0006

Date Received: Apr 25, 2002

Reporting Year: 2001

Principal Investigator: Bruce Bury, Forest and Rangeland, Ecosystem Science Center, Corvallis, OR

Additional investigator(s): Brome McCreary, Christopher Pearl, Christopher Rombought

Park-assigned Study Id. # CRLA-01029

Permit Expiration Date: Dec 31, 2002

Permit Start Date: Jun 15, 2001

Study Starting Date: Jun 15, 2001

Study Ending Date: Dec 31, 2002

Study Status: Continuing

Activity Type: Research

Subject/Discipline: Herpetology (Amphibians / Reptiles)

Objectives: Conduct field surveys and assess status of species of management concern. We propose to develop a database on past and recent distribution records, and relate habitat variables that will provide better opportunities to protect these particular species and their breeding habitats. Our focus in southwestern Oregon will be on the Cascade frog (Rana cascadae) and western toad (Bufo boreas) on NPS, USFS and BLM lands.

Findings and Status: We surveyed at least 4 lentic sites during summer 2001 for cascade frog and western toad breeding. Larval and juvenile western toads confirmed breeding in 2001 within the crater itself. Western toads were also encountered near the Munson Meadow complex. Due to the drought year, most of the other sites were almost completely desiccated at time of July/August surveys. We plan to contact Park staff and resurvey these sites in summer 2002, which appears to be a more normal precipitation year. We also utilized the Crater Lake National Park museum collection to confirm historical localities within and outside park boundaries.

For this study, were one or more specimens collected and removed from the park but not destroyed during analyses? No

Funding provided this reporting year by NPS: 0

Funding provided this reporting year by other sources: 25000

Full name of college or university: n/a

Annual funding provided by NPS to university or college this reporting year: 0


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