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John Bailey, Oregon State University Keith Slauson, USFS, Pacific Southwest Research Station Katie Moriarty, Oregon State University Photo: K. Slauson.

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Presentation on theme: "John Bailey, Oregon State University Keith Slauson, USFS, Pacific Southwest Research Station Katie Moriarty, Oregon State University Photo: K. Slauson."— Presentation transcript:

1 John Bailey, Oregon State University Keith Slauson, USFS, Pacific Southwest Research Station Katie Moriarty, Oregon State University Photo: K. Slauson Effects of Landscape-scale Forest Management on Pacific Marten Occupancy & Population Connectivity

2 Presentation Outline i. Background

3 Presentation Outline i. Background ii. Summary of Accomplishments

4 Presentation Outline i. Background iii. Animals Detected ii. Summary of Accomplishments

5 Presentation Outline i. Background iii. Animals Detected iv. Goals for 2015 - timeline ii. Summary of Accomplishments

6 Pacific Marten (Martes caurina) Squirrel-sized carnivore within the weasel family (600-1000g) Associated with structurally-complex forests Rest and den sites = snags, trees and logs >36” DBH Populations decline in areas with 25-30% forest cover removed (Hargis et al. 1999, Potvin et al. 2000) Dietary generalist (given high metabolism) High predation risk Marten

7 Washington – Martes caurina caurina Oregon and N. California – M. c. humboldtensis Historical Distribution of Pacific Marten in Coastal Forests

8 Historical distribution: Humboldt Marten (M. c. caurina) in Oregon and California Single subspecies in California and Oregon Status Review For Federally Endangered in coastal CA & OR by April 2015

9 Survey Locations Marten Detections Roadkill Records Recent Trapping Extant Pop. Areas Potential Pop. Areas 14 roadkill (1985-2013) 3 trapped (2011-2013) 9 detections (~2000) Two extant populations in Oregon Known (Central Coast) Known (South Coast) Potential Central Coast South Coast

10 Sample Unit Design Example Replicate Study Area Multi-Scale Analysis Home-Range Connectivity 1-km 500m Edge of Marten Population Marten Study Design – FWHMF 2014

11 Overall Study Design Sample areas at border known locations 2 stations/ sample unit Project Cooperators & Contributors* Federal Agencies U.S.F.S. Rogue-Siskiyou NF* U.S.F.S. Siuslaw NF* B.L.M. Coos Bay* & Salem* U.S. Fish and Wildlife Service* U.S.F.S. PSW Research Station* Private Landowners Hancock Forest Management* Plum Creek Timber Company* Weyerhauser* State Agencies Oregon Dept. of Fish and Wildlife Oregon Dept. of Forestry OSU Project Goals: Locate marten populations and identify suitable landscape conditions

12 Presentation Outline i. Background iii. Animals Detected iv. Goals for 2015 v. Timeline ii. Summary of Accomplishments

13 Protocol Created – Consistent Effort Protocol for Oregon -2 & 6-km grid -Established methods -Genetic snares

14 Undergraduate Training Opportunity Five OSU Students

15 Two Grids Surveyed – Several Ownerships USFS – 7 sections BLM – 2 sections Plum Creek – 9 sections “Grass Mountain” 18 Sample Units Hwy 34 “Powers” 18 Sample Units Powers

16 Expanded Efforts – Beyond the FWHMF Vehicles and Fuel - BLM and USFWS Housing – Siuslaw and Rogue Siskiyou National Forests Additional Surveys – Plum Creek, Hancock, Siuslaw NF 87 sample units surveyed! (174 stations, >3500 trap nights)

17 Presentation Outline i. Background iii. Animals Detected ii. Summary of Accomplishments

18 Percent Stations with Species Detected

19 Only One Marten Detected on One Occasion

20 Presentation Outline i. Background iii. Animals Detected iv. Goals for 2015 ii. Summary of Accomplishments

21 Some knowledge to guide efforts Slauson et al. 2007 and Slauson et al. in prep Key Variables: - High Precipitation Areas-forest productivity - Middle Elevations - High Old Growth Structure-key structural habitat features - Serpentine habitat-unique habitat association

22 Subspecies information – Dispersal Study

23 Forensic Results: 9 of 9 carcasses or remains DNA = bobcat At den sites, 3/5 den areas had bobcats investigating den trees Mortalities: 9 of 22 (41%) radio collared martens have died in the first 23 months Humboldt Marten Dispersal Study: Predation Likely a Limiting Factor Product of the Humboldt Marten Conservation Working Group Slauson et al. in prep

24 New Study (OFIC) – Increase Effectiveness Martens Present Martens Absent Not Detected Not detected…Detected Occupancy Models (MacKenzie et al. 2006) Predation Risk Bait and Lure Station Scale Survey Duration

25 Combining Multiple Research Projects Adapt survey protocol next season to best understand marten occurrence and range Martens Present Not detected…Detected Occupancy Models (MacKenzie et al. 2006) Predation Risk Bait and Lure Station Scale Survey Duration

26 On Schedule – Fiscal Year 2014-2015 Fiscal Year 2015-2016 May & June 2015 - Survey 2-3 replicates July & August 2015 - Survey 2-3 replicates July & August 2014 - Survey 1-2 replicates Progress Report and Planning Before Summer 2016 - Final Report Timeline Dec 2014

27 On Schedule – And Continuing to Build Fiscal Year 2014-2015 Fiscal Year 2015-2016 May & June 2015 - Survey 2-3 replicates July & August 2015 - Survey 2-3 replicates July & August 2014 - Survey 1-2 replicates Progress Report and Planning Before Summer 2016 - Final Report Timeline February – May 2015 - Survey Effectiveness - OFIC Re-evaluate Protocol Supplementation to Hire Larger Crew - NCASI

28 1.New Scientific Foundation: First quantitative evaluation of marten distribution 2.Identify the range of habitat conditions capable of supporting home range occupancy & connectivity 3.Identify approaches to how marten habitat can move in space and time to provide flexible alternatives for management Significance to Managing Coastal Oregon’s Working Forests

29 Acknowledgements Field Crew: B. Peterson, T. Stinson, J. Ellison, C. Scott, A. Palmer T. McBride (Hancock), J. Verschuyl (NCASI), J. Thrailkill (USFWS), R. Price (BLM), R. Steiner (Plum Creek), M. Rochelle (Weyerhaeuser), D. Williams (Siuslaw NF), D. Clayton (Rogue Siskiyou NF) and many more…

30 Questions?

31 Example of a Camera Set

32 Example of a Track Plate Set

33 What characterizes a marten? Territoriality 4 main tasks: - Sleep - Eat - Reproduce - Survive

34 Territorial – 4 adult males with little overlap

35 Rest and denning locations -Refugia from predators, temperature extremes, precipitation -Often large structures (>36” dbh) Resting location provide elements key to survival: Photo: Mark Linnell, Oregon State Cavity in Downed Log Cavity in Live Tree

36 Specialized generalists – limited by calories Range may be restricted by availability of ‘large’ prey

37 Females - March to September - 1-2 kits ( up to 4) - 1/3 annual energy during lactation ( Powell and Leonard 1983 ) Photo: P. Figura, Ca. Dept. Fish and Wildlife Female + 3 kits Shasta-T National Forest Males - June to September - 2 to 5 females * Weight and mortality Reproduction – Period of Decreased Survival Sexually reproductive at 2 years

38 Survival Larry Ostby Annual survival ~0.53-0.65

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