Leslie Roche

Dr. Leslie Roche

orcid

Research Focus & Metrics

Academic Career Length

15Years (2012-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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1 July 2018 in Journal of Environmental Quality
Verified
Journal Article
Open access
PDF file
RBRyan C. Byrnes
Ryan C. Byrnes
DEDanny J. Eastburn
Danny J. Eastburn
KTKenneth W. Tate
Kenneth W. Tate
LRLeslie Roche
Leslie Roche
Grazing lands support the livelihoods of millions of people across nearly one‐half of the globe. Soils are the backbone of stability and resilience in these systems. To determine livestock grazing impacts on soil health, we conducted a global meta‐analysis of soil organic carbon (SOC), total N, C/N ratio, and bulk density responses to grazing strategies (continuous, rotational, and no grazing) and intensities (heavy, moderate, and light grazing) from 64 studies around the world. Across all studies and grazing intensities, continuous grazing significantly reduced SOC, C/N, and total N compared with no grazing. Soil compaction (i.e., increased bulk density) was greater under both continuous and rotational grazing compared with no grazing; however, rotational grazing had lower bulk density than continuous grazing. Rotational grazing had greater SOC than continuous grazing and was not different from no grazing. The positive responses of SOC to rotational grazing could create climate change mitigation opportunities. Grazing strategy comparisons were minimally conditioned by aridity class (i.e., arid, subhumid, and humid); however, complete observations were notably limited or missing for many rotational grazing comparisons. For continuous and no grazing strategy comparisons, we found that grazing management can significantly influence soil function and health outcomes; however, site‐specific environmental factors play important moderating roles. Greater coordination across regional, national, and global efforts, as well as consistent guidelines for soil health evaluation, would help overcome these knowledge gaps and vastly improve our collective understanding of grazing impacts on soil health, providing greater management and policy impacts.Core Ideas: Grazing increases soil compaction relative to no grazing. Rotation improves soil bulk density and organic carbon over continuous grazing. Reduced grazing intensity improves soil bulk density and organic carbon. Site‐specific environmental factors play important moderating roles. Rotational grazing strategies could create climate change mitigation opportunities.

1 May 2015 in Rangeland Ecology & Management
Verified
Journal Article
Closed access
LRLeslie Roche
Leslie Roche
BCBethany Cutts
Bethany Cutts
JDJ.D. Derner
J.D. Derner
MLM.N. Lubell
M.N. Lubell
KTK.W. Tate
K.W. Tate

1 November 2013 in Rangeland Ecology & Management
Verified
Journal Article
Closed access
MLM.N. Lubell
M.N. Lubell
BCBethany Cutts
Bethany Cutts
LRLeslie Roche
Leslie Roche
MHM. Hamilton
M. Hamilton
JDJ.D. Derner
J.D. Derner
KTK.W. Tate
K.W. Tate

29 October 2017 in Restoration Ecology
Verified
Journal Article
Closed access
PDF file
KHKristin B. Hulvey
Kristin B. Hulvey
ELElizabeth A. Leger
Elizabeth A. Leger
LPLauren M. Porensky
Lauren M. Porensky
LRLeslie Roche
Leslie Roche
KVKari E. Veblen
Kari E. Veblen
EGElise S. Gornish
Elise S. Gornish

1 September 2015 in Rangeland Ecology & Management
Verified
Journal Article
Closed access
LRLeslie Roche
Leslie Roche
TSTracy K. Schohr
Tracy K. Schohr
JDJustin D. Derner
Justin D. Derner
MLMark N. Lubell
Mark N. Lubell
BCBethany Cutts
Bethany Cutts
KTKenneth W. Tate
Kenneth W. Tate

30 June 2014 in Ecosphere
Verified
Journal Article
Open access
EKEmily Kachergis
Emily Kachergis
JDJustin D. Derner
Justin D. Derner
BCBethany Cutts
Bethany Cutts
LRLeslie Roche
Leslie Roche
VEValerie T. Eviner
Valerie T. Eviner
KTKenneth W. Tate
Kenneth W. Tate
Extreme droughts like the recent 2011–2013 drought impacting the central and western United States present a challenge to sustaining livestock ranching operations and the ecosystem goods and services they produce. Wyoming ranchers manage half of this drought‐prone state and are at the forefront of this challenge. We examined Wyoming ranchers' drought management strategies and how ranch characteristics affect drought management flexibility, a key component of resilience, through a mail survey. We find that many survey respondents manage drought in similar ways, by selling livestock and buying feed, highlighting the market risks associated with drought. Ranches that are larger, include yearling livestock, use shorter grazing periods, and/or incorporate alternative on‐ranch activities (e.g., hunting) use more drought management practices and thus have greater flexibility. Larger ranches experience fewer drought impacts, highlighting advantages of a larger resource base. Our findings suggest three components of national drought policy that encourages flexibility and thus increases resilience of ranches to drought: (1) encouraging forage‐sharing mechanisms; (2) promoting income diversification that is independent of climatic variability; and (3) facilitating a shift to diversified livestock production systems. These measures could increase sustainability of ranching livelihoods and provision of ecosystem services despite predicted increases in intensity and duration of future droughts.