Evaluating the intersection of a regional wildlife connectivity network with highways

BackgroundReliable predictions of regional-scale population connectivity are needed to prioritize conservation actions. However, there have been few examples of regional connectivity models that are empirically derived and validated. The central goals of this paper were to (1) evaluate the effectiveness of factorial least cost path corridor mapping on an empirical resistance surface in reflecting the frequency of highway crossings by American black bear, (2) predict the location and predicted intensity of use of movement corridors for American black bear, and (3) identify where these corridors cross major highways and rank the intensity of these crossings.ResultsWe used factorial least cost path modeling coupled with resistant kernel analysis to predict a network of movement corridors across a 30.2 million hectare analysis area in Montana and Idaho, USA. Factorial least cost path corridor mapping was associated with the locations of actual bear highway crossings. We identified corridor-highway intersections and ranked these based on corridor strength. We found that a major wildlife crossing overpass structure was located close to one of the most intense predicted corridors, and that the vast majority of the predicted corridor network was “protected” under federal management. However, narrow, linear corridors connecting the Greater Yellowstone Ecosystem to the rest of the analysis area had limited protection by federal ownership, making these additionally vulnerable to habitat loss and fragmentation.ConclusionsFactorial least cost path modeling coupled with resistant kernel analysis provides detailed, synoptic information about connectivity across populations that vary in distribution and density in complex landscapes. Specifically, our results could be used to quantify the structure of the connectivity network, identify critical linkage nodes and core areas, map potential barriers and fracture zones, and prioritize locations for mitigation, restoration and conservation actions.

[1]  Samuel A. Cushman,et al.  Effects of habitat loss and fragmentation on amphibians: A review and prospectus , 2006 .

[2]  Jon S. Horne,et al.  Identifying habitat characteristics to predict highway crossing areas for black bears within a human-modified landscape , 2011 .

[3]  B. Mclellan,et al.  Grizzly bears and resource-extraction industries: effects of roads on behaviour, habitat use and demography , 1988 .

[4]  T. Bailey.  Spatial Analysis: A Guide for Ecologists , 2006 .

[5]  R. Forman,et al.  Estimate of the Area Affected Ecologically by the Road System in the United States , 2000 .

[6]  Edsger W. Dijkstra,et al.  A note on two problems in connexion with graphs , 1959, Numerische Mathematik.

[7]  Erik Matthysen,et al.  The application of 'least-cost' modelling as a functional landscape model , 2003 .

[8]  John F. Lehmkuhl,et al.  Landscape permeability for large carnivores in Washington: a geographic information system weighted-distance and least-cost corridor assessment. , 2002 .

[9]  Emilio M. Bruna,et al.  Habitat fragmentation and large‐scale conservation: what do we know for sure? , 1999 .

[10]  S. Cushman,et al.  Use of Empirically Derived Source‐Destination Models to Map Regional Conservation Corridors , 2009, Conservation biology : the journal of the Society for Conservation Biology.

[11]  C. J. Hill,et al.  Linear Strips of Rain Forest Vegetation as Potential Dispersal Corridors for Rain Forest Insects , 1995 .

[12]  Nick M. Haddad,et al.  CORRIDOR USE BY DIVERSE TAXA , 2003 .

[13]  Samuel A. Cushman,et al.  Gene Flow in Complex Landscapes: Testing Multiple Hypotheses with Causal Modeling , 2006, The American Naturalist.

[14]  C. L. Shafer,et al.  NATURE RESERVES - Island Theory and Conservation Practice , 1991 .

[15]  R. Hobbs.  The role of corridors in conservation: Solution or bandwagon? , 1992, Trends in ecology & evolution.

[16]  Paul C. Paquet,et al.  Conservation Biology and Carnivore Conservation in the Rocky Mountains , 1996 .

[17]  P. Beier,et al.  Do Habitat Corridors Provide Connectivity? , 1998 .

[18]  D. Theobald,et al.  Connecting natural landscapes using a landscape permeability model to prioritize conservation activities in the United States , 2012 .

[19]  Paul Beier,et al.  Biological corridors and connectivity , 2013 .

[20]  S. Cushman,et al.  Spurious correlations and inference in landscape genetics , 2010, Molecular ecology.

[21]  R. G. Anthony,et al.  Effects of Road Management on Movement and Survival of Roosevelt Elk , 1997 .

[22]  Paul Beier,et al.  Forks in the Road: Choices in Procedures for Designing Wildland Linkages , 2008, Conservation biology : the journal of the Society for Conservation Biology.

[23]  S. Cushman,et al.  Re-Evaluating Causal Modeling with Mantel Tests in Landscape Genetics , 2013 .

[24]  R. Thiel,et al.  Relationship between Road Densities and Wolf Habitat Suitability in Wisconsin , 1985 .

[25]  Marie-Josée Fortin,et al.  Applications of landscape genetics in conservation biology: concepts and challenges , 2010, Conservation Genetics.

[26]  Aurélie Coulon,et al.  Identifying future research needs in landscape genetics: where to from here? , 2009, Landscape Ecology.

[27]  Barry R. Noon,et al.  Biological Corridors: Form, Function, and Efficacy , 1997 .

[28]  J. Craig.  Viable populations for conservation , 1990 .

[29]  Å. Berggren,et al.  Effect of Corridors and Habitat Edges on Dispersal Behavior, Movement Rates, and Movement Angles in Roesel's Bush‐Cricket (Metrioptera roeseli) , 2002 .

[30]  C. Flather,et al.  Evaluating the sufficiency of protected lands for maintaining wildlife population connectivity in the U.S. northern Rocky Mountains , 2012 .

[31]  E. Zavaleta,et al.  Biodiversity management in the face of climate change: A review of 22 years of recommendations , 2009 .

[32]  David J. Mladenoff,et al.  Predicting gray wolf landscape recolonization: logistic regression models vs. new field data , 1999 .

[33]  L J Lyon,et al.  Road Density Models Describing Habitat Effectiveness for Elk , 1983 .

[34]  A. U.S.,et al.  Movement Corridors : Conservation Bargains or Poor Investments ? , 2022 .

[35]  Liping Xu,et al.  [Response of maize emergence rate and yield to soil water stress in period of seeding emergence and its meteorological assessment in central area of Jilin Province]. , 1988, Ying yong sheng tai xue bao = The journal of applied ecology.

[36]  D. Simberloff,et al.  Conservation Biology: An Evolutionary-Ecological Perspective , 1980 .

[37]  G. Luikart,et al.  Why replication is important in landscape genetics: American black bear in the Rocky Mountains , 2011, Molecular ecology.

[38]  Samuel A. Cushman,et al.  Multi-taxa population connectivity in the Northern Rocky Mountains , 2012 .

[39]  M. Fortin,et al.  Spatial Analysis: A Guide for Ecologists 1st edition , 2005 .

[40]  A. Storfer,et al.  Landscape genetics of the blotched tiger salamander (Ambystoma tigrinum melanostictum) , 2005, Molecular ecology.

[41]  R. Forman,et al.  ROADS AND THEIR MAJOR ECOLOGICAL EFFECTS , 1998 .

[42]  Kevin McGarigal,et al.  Estimating landscape resistance to movement: a review , 2012, Landscape Ecology.

[43]  Erin L. Landguth,et al.  UNICOR: a species connectivity and corridor network simulator , 2012 .

[44]  Samuel A. Cushman,et al.  Movement behavior explains genetic differentiation in American black bears , 2010, Landscape Ecology.

[45]  L. Fahrig.  Effects of Habitat Fragmentation on Biodiversity , 2003 .

[46]  Reed F. Noss,et al.  A Regional Landscape Approach to Maintain Diversity , 1983 .

[47]  Kevin McGarigal,et al.  A Resistant‐Kernel Model of Connectivity for Amphibians that Breed in Vernal Pools , 2007, Conservation biology : the journal of the Society for Conservation Biology.

[48]  Gordon B. Stenhouse,et al.  A habitat-based framework for grizzly bear conservation in Alberta , 2006 .

[49]  Anthony P. Clevenger,et al.  Highway mitigation fencing reduces wildlife-vehicle collisions , 2001 .

[50]  J. Peek,et al.  Elk Habitat Use Relative to Forest Succession in Idaho , 1983 .

[51]  R. East.  Species-area curves and populations of large mammals in African savanna reserves , 1981 .

[52]  S. Barnum.  Identifying the best locations to provide safe highway crossing opportunities for wildlife , 2003 .

[53]  M. Fortin,et al.  Use of resistance surfaces for landscape genetic studies: considerations for parameterization and analysis , 2010, Molecular ecology.

[54]  Shelley M. Alexander,et al.  The effects of highway transportation corridors on wildlife: a case study of Banff National Park , 2000 .

[55]  C. C. Clair,et al.  Elements that promote highway crossing structure use by small mammals in Banff National Park , 2004 .

[56]  Kathryn E Sieving,et al.  An Experimental Test of Matrix Permeability and Corridor Use by an Endemic Understory Bird , 2006, Conservation biology : the journal of the Society for Conservation Biology.

[57]  Tiffany D H Allen,et al.  US 93 Post-Construction Wildlife-Vehicle Collision and Wildlife Crossing Monitoring and Research on the Flathead Indian Reservation between Evaro and Polson, Montana: Annual Report 2010 , 2010 .

[58]  Paul Beier,et al.  In My Experience: A Checklist for Evaluating Impacts to Wildlife Movement Corridors , 1992 .

[59]  C. Frissell,et al.  Review of Ecological Effects of Roads on Terrestrial and Aquatic Communities , 2000 .