Integrated Range Assessment for Woodland Caribou and Their Habitat Kesagami Range 2010
Total Page:16
File Type:pdf, Size:1020Kb
Integrated Range Assessment for Woodland Caribou and their Habitat Kesagami Range 2010 Ministry of Natural Resources and Forestry. Species at Risk Branch. December 2014. Version 1.1. Cite as: MNRF. 2014. Integrated Range Assessment for Woodland Caribou and their Habitat: Kesagami Range 2010. Species at Risk Branch, Thunder Bay, Ontario xi + 83pp. For a copy of the Integrated Assessment Protocol for Woodland Caribou Ranges in Ontario (2014) and/or Delineation of Woodland Caribou Ranges in Ontario (2014), please email [email protected] i Table of Contents List of Figures ............................................................................................................................... iv List of Tables ............................................................................................................................... vii Acknowledgements .................................................................................................................... viii Executive Summary ...................................................................................................................... ix 1.0 Overview ............................................................................................................................... 1 2.0 Range Description and Delineation ....................................................................................... 1 3.0 Background Information and Data ......................................................................................... 5 3.1 Land management history and management direction ...................................................... 5 3.2 Caribou occupancy history and assessment .................................................................... 17 3.3 Probability of occupancy survey and analysis .................................................................. 23 3.4 Caribou ecology and range narrative ............................................................................... 29 3.5 Influence of current management direction ...................................................................... 33 3.6 Major data and analysis uncertainties .............................................................................. 35 3.7 Special considerations within the range ........................................................................... 37 3.7.1 Quebec ..................................................................................................................... 38 3.8 Other wildlife .................................................................................................................... 39 3.9 Results of past range assessments ................................................................................. 44 4.0 Integrated Range Assessment Framework ......................................................................... 45 5.0 Quantitative Lines of Evidence Methods and Results .......................................................... 46 5.1 Population state: size and trend ....................................................................................... 46 5.1.1 Population state methods ......................................................................................... 47 5.1.2 Population state results ............................................................................................ 48 5.2 Habitat state: disturbance and habitat .............................................................................. 53 5.2.1 Disturbance assessment .......................................................................................... 53 5.2.2 Disturbance analysis results ..................................................................................... 54 5.2.3 Disturbance analysis summary ................................................................................. 61 5.2.4 Disturbance considerations related to water ............................................................. 63 5.2.5 Habitat state: habitat assessment ............................................................................. 65 5.2.6 Habitat assessment results ....................................................................................... 65 6.0 Interpretation of Lines of Evidence ...................................................................................... 72 6.1 Interpretation of the population state ................................................................................ 72 6.2 Interpretation of habitat state ........................................................................................... 73 7.0 Integrated Risk Analysis ...................................................................................................... 74 7.1 Population size................................................................................................................. 74 7.2 Population trend ............................................................................................................... 74 7.3 Disturbance analysis ........................................................................................................ 76 7.4 Risk assessment process ................................................................................................ 76 7.5 Range condition ............................................................................................................... 76 8.0 Involvement of First Nation Communities ............................................................................ 77 9.0 Comparison with the Federal Generalized Approach .......................................................... 77 10.0 Literature Cited .................................................................................................................... 79 ii List of Figures Figure 1. Location of the Kesagami Range within the Continuous Distribution in Ontario. ........... 3 Figure 2. The Kesagami Range and associated ecodistricts and protected areas. ...................... 4 Figure 3. Dates and locations of significant historical natural and anthropogenic disturbances that have occurred within the Kesagami Range. .......................................................................... 6 Figure 4. Human infrastructure and historical developments occurring within the Kesagami Range. .......................................................................................................................................... 7 Figure 5. Caribou occurrence across Ontario summarized by date of most recent observation as of June 2013. Assessment activities within the Kesagami Range have been variable. Absence of observations may reflect low survey effort, lack of reporting, or the absence of caribou. ....................................................................................................................................... 20 Figure 6. Historical caribou observations1,2 within the Kesagami Range and surrounding area including observations from aerial surveys, collared caribou locations, research projects, and casual observations as of August 2013. ..................................................................................... 21 Figure 7. Caribou observations in the Kesagami Range1 during February and March from all observation sources (i.e. aerial surveys, collared caribou locations, and casual observations) as of August 2013. ...................................................................................................................... 22 Figure 8. Fixed-wing aerial survey transects on the Kesagami Range following the hexagon sampling grid as well as survey transects from moose aerial inventory surveys flown on a linear grid during the winter of 2010. Observations of caribou and their sign are also shown from the surveys; any evidence of caribou presence from either survey contributes to the probability of occupancy calculation. .......................................................................................... 24 Figure 9. Probability of occupancy across the Kesagami Range conditional on detection (i.e. ψ = 1) where caribou were confirmed to be present from data collected during the winter 2010 aerial survey. .............................................................................................................................. 25 Figure 10. Probability of occupancy derived using habitat covariates acoss the Kesagami Range using the best predictive model based on the winter 2010 aerial surveys. ...................... 27 Figure 11. Probability of occupancy derived using habitat covariates across the Kesagami Range overlaid with caribou observations from the winter 2010 aerial surveys. ......................... 28 Figure 12. Probability of occupancy determined using habitat covariates from data collected during the winter 2010 aerial survey as well as historical natural and anthropogenic disturbances within the Kesagami Range. .................................................................................. 28 Figure 13. Dynamic caribou habitat schedule (DCHS) for the Kesagami Range as reflected within contemporary Forest Management Plans (FMPs). ........................................................... 34 Figure 14. Wildlife Management Units with moose and wolf sightings or sign observed during the winter 2010 aerial surveys in the Kesagami Range. ............................................................. 40 Figure 15. Moose density estimates with 90% confidence intervals for WMUs 24, 26, 27, and 30 from 1981-2010. ...................................................................................................................