North, M. P., J. T. Stevens, D. F. Greene, M. Coppoletta, E. E. Knapp, A. M. Latimer, C. M. Restaino, R. E. Tompkins, K. R. Welch, R. A. York, D. J. N. Young, J. N. Axelson, T. N. Buckley, B. L. Estes, R. N. Hager, J. W. Long, M. D. Meyer, S. M. Ostoja, H. D. Safford, K. L. Shive, C. L. Tubbesing, H. Vice, D. Walsh, C. M. Werner, and P. Wyrsch. 2019. Tamm Review: Reforestation for resilience in dry western U.S. forests. Forest Ecology and Management 432:209-224. https://doi.org/10.1016/j.foreco.2018.09.007
Jens T Stevens, Ph.D.
Biography
Jens Stevens is a research ecologist at the New Mexico Landscapes Field Station, a Fort Collins
Science Center facility in Santa Fe, New Mexico. Jens has a M.S. in Plant Biology from the
University of Vermont, where he studied fire-invasive plant interactions in the Florida Everglades,
and a Ph.D. in Ecology from the University of California Davis, where he studied interactions
between fire, climate and forest management in the Sierra Nevada of California. Jens has conducted
diverse research on forests of California and elsewhere in western North America, which seeks to
understand the causes and ecological consequences of forest disturbance at multiple spatial and
temporal scales.
Education
-
Ph.D. Ecology, University of California Davis, 2014
-
M.S. Plant Biology, University of Vermont, 2008
-
B.S. Biology, Carleton College, Minnesota, 2006
Professional Experience
-
2018 - present, Research Ecologist, USGS New Mexico Landscapes Field Station, Fort Collins Science Center, Santa Fe, NM
-
2016-2018, Postdoctoral Scholar, Department of Environmental Science, Policy and Management, University of California Berkeley
-
2014-2016, Postdoctoral Scholar, John Muir Institute of the Environment, University of California Davis
-
2008-2009, Research Technician, Dartmouth College, Hanover New Hampshire
Science and Products
Date published: April 15, 2019
Status: Active Effects of disturbance and drought on the forests and hydrology of the Southern Rocky Mountains
Climate-related forest disturbances, particularly drought-induced tree mortality and large, high-severity fires from increasingly warm and dry conditions, are altering forest ecosystems and the ecosystem services society depends on (e.g., water supplies). Our research combines long-term place-based ecological data, diverse methods (e.g., paleo, remote-sensing), and networking approaches to...
Attribution: Land Resources, Land Change Science Program
Date published: September 23, 2016
Status: Active The New Mexico Landscapes Field Station
The New Mexico Landscapes Field Station is a place-based, globally-connected, ecological research group that studies and interprets ecosystem and wildlife dynamics, working with land managers and community leaders to deliver solutions that foster the linked health of human and natural systems.
Our partnerships, and co-location, with land management agencies provide us with opportunities...
Contacts: Craig D Allen, Ph.D., Ernie Valdez, Ph.D., Ellis Margolis, Ph.D., Jens T Stevens, Ph.D., Kay Beeley
Pre-USGS Publications
Hagmann, R. K., J. T. Stevens, J. M. Lydersen, B. M. Collins, J. J. Battles, P. F. Hessburg, C. R. Levine, A. G. Merschel, S. L. Stephens, A. H. Taylor, J. F. Franklin, D. L. Johnson, and K. N. Johnson. 2018. Improving the use of early timber inventories in reconstructing historical dry forests and fire in the western United States: Comment. Ecosphere 9: e02232.
Earles, J. M., J. T. Stevens, O. Sperling, J. Orozco, M. P. North, and M. A. Zwieniecki. 2018. Extreme mid‐winter drought weakens tree hydraulic–carbohydrate systems and slows growth. New Phytologist: 219: 89-97. dx.doi.org/10.1111/nph.15136
Stevens, J. T., B. M. Collins, J. D. Miller, M. P. North, and S. L. Stephens. 2017. Changing spatial patterns of stand-replacing fire in California conifer forests. Forest Ecology and Management 406: 28-36.
Safford, H.D. and Stevens, J.T. 2017. Natural Range of Variation (NRV) for yellow pine and mixed conifer forests in the Sierra Nevada, southern Cascades, and Modoc and Inyo National Forests, California, USA. General Technical Report PSW-GTR-256. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 229 p.
Stevens, J. T. 2017. Scale-dependent effects of post-fire canopy cover on snowpack depth in montane coniferous forests. Ecological Applications 27: 1888-1900.
Collins, B. M., J. T. Stevens, J. D. Miller, S. L. Stephens, P. M. Brown, and M. P. North. 2017. Alternative characterization of forest fire regimes: incorporating spatial patterns. Landscape Ecology 32: 1543-1552.
Young, D. J. N.*, J. T. Stevens*, J. M. Earles*, J. Moore, A. Ellis, A. L. Jirka, and A. M. Latimer. 2017. Long-term climate and competition explain forest mortality patterns under extreme drought. Ecology Letters 20: 78-86. * equal contribution.
Stevens, J. T., B. M. Collins, J. W. Long, M. P. North, S. J. Prichard, L. W. Tarnay, and A. M. White. 2016. Evaluating potential trade-offs among fuel treatment strategies in mixed-conifer forests of the Sierra Nevada. Ecosphere 7: e01445.
Stevens, J. T., H. D. Safford, M. P. North, J. S. Fried, A. N. Gray, P. M. Brown, C. R. Dolanc, S. Z. Dobrowski, D. A. Falk, C. Farris, J. F. Franklin, P. Z. Fulé, R. K. Hagmann, E. E. Knapp, J. D. Miller, G. F. Smith, T. W. Swetnam, and A. H. Taylor. 2016. Average stand age from forest inventory plots does not describe historical fire regimes in ponderosa pine and mixed-conifer forests of western North America. PLoS One 11: e0147688.
Stevens, J. T., H. D. Safford, S. P. Harrison and A. M. Latimer. 2015. Forest disturbance accelerates thermophilization of understory plant communities. Journal of Ecology 103: 1253-1263.
Winford, E.M., J. T. Stevens, and H. D. Safford. 2015. Effects of fuel treatments on California mixed-conifer forests. California Agriculture 69: 75-81.
Zefferman, E., J. T. Stevens, G. K. Charles, M. Dunbar-Irwin, T. Emam, S. Fick, L. Morales, K. M. Wolf, D. J. N. Young, and T. P. Young. 2015. Plant communities in harsh sites are less invaded: a summary of observations and proposed explanations. AoB Plants 7: plv056.
Stevens, J. T., H. D. Safford, and A. M. Latimer. 2014. Wildfire-contingent effects of fuel treatments can promote ecological resilience in dry mixed conifer forests. Canadian Journal of Forest Research 44: 843-854. Editor’s Choice- Featured Paper.
Stevens, J. T. and A. M. Latimer. 2015. Snowpack, fire, and forest disturbance: interactions affect montane invasions by non-native shrubs. Global Change Biology 21: 2379–2393.
Safford, H. D., J. T. Stevens, K. Merriam, M. D. Meyer, and A. M. Latimer. 2012. Fuel treatment effectiveness in California yellow pine and mixed conifer forests. Forest Ecology and Management 274: 17-28.
Stevens, J. T. and B. Beckage. 2010. Demographic responses of Brazilian pepper (Schinus terebinthifolius) to pine savanna fires. Natural Areas Journal 30: 500-510.
Stevens, J. T. and B. Beckage. 2009. Fire feedbacks facilitate invasion of pine savannas by Brazilian pepper (Schinus terebinthifolius). New Phytologist 184: 365-375.