St. Clair, Sam

Plant & Wildlife Sciences

Email: 4wxgpemvDf}y2ihy  (Email Form)


4124  LSB
Provo, UT 84602
(801) 422-5725

Associate Professor

Curriculum Vitae

 Honors and Awards
  • BYU University Award : Class of 49 Young Scholar Award
  • Redd Center in Western Studies : Karl and Mollie Butler Endowed Young Scholar Award
 Courses Taught

Fall 2017
  • PWS 100: Plants in the Environment Section 002
  • PWS 494R: Mentored Learning Experience Section 014
  • PWS 697R: Research Section 017
  • PWS 799R: Doctoral Dissertation Section 005
Summer 2017
  • PWS 150: Environmental Biology Section 001
  • PWS 494R: Mentored Learning Experience Section 026
  • PWS 697R: Research Section 010
  • PWS 699R: Master's Thesis Section 011
Spring 2017
  • PWS 494R: Mentored Learning Experience Section 017
  • PWS 697R: Research Section 010
Winter 2017
  • IAS 201R: Cultural Survey Section 055
  • PWS 100: Plants in the Environment Section 001
  • PWS 440: Plant Physiology Section 001
  • PWS 494R: Mentored Learning Experience Section 014
  • PWS 699R: Master's Thesis Section 012
  • PWS 799R: Doctoral Dissertation Section 005

Selected Publications

Journal Articles

Sharp-Bowman TR, McMillan BR, St Clair SB. 2017. Rodent herbivory and fire differentially affect plant species recruitment based on variability in life history traits. Ecosphere. 8:1-10.  doi:10.1002/ecs2.2016/full

Sharp-Bowman TR, McMillan BR, St Clair SB. 2017. Rodent herbivory differentially affects mortality rates of 14 native plant species with contrasting life history and growth form traits. Oecologia. 185:465-473.  doi:10.1007/s00442-017-3944-y

St Clair SB, O'Connor R, Gill RA, McMillan BR. 2016. Biotic resistance and disturbance: rodent consumers regulate post-fire plant invasions and increase community diversity. Ecology. 97:1700-1711.  doi:10.1002/ecy.1391

St. Clair S, Rhodes A, Barney T. 2016. Stand composition, tree proximity and size have minimal effects on leaf function of coexisting aspen and subalpine fir. PLoS ONE. 11:1-12.

St Clair SB, Seager T, Eisenberg C. 2013. Patterns and consequences of ungulate herbivory in aspen forests of North Americ. Forest Ecology and Management. 299:81-90.

St Clair SB, Cavard X, Bergeron Y. 2013. The role of facilitation and competition in the development and resilience of aspen forest. Forest Ecology and Management. 299:91-99.

Lindroth R, St Clair SB. 2013. Adaptation of quaking aspen (Populus tremuloides Michx.) for defense against herbivores. Forest Ecology and Management. 299:14-21.

Rogers P, Eisenberg C, St Clair SB. 2013. Resilience in quaking aspen: recent advances and future needs. Forest Ecology and Management. 299:1-5.

Buck J, St Clair SB. 2012. Aspen increases soil moisture, nutrients, organic matter and respiration in Rocky Mountain forest communities. 7(12):e52369.

Horn KJ, McMillan BR, St Clair SB. 2012. Expansive fire in Mojave Desert shrubland reduces abundance and species diversity of small mammals. Journal of Arid Environments. 77:54-58.

Calder J, St Clair SB. 2012. Facilitation drives mortality patterns on succession gradients of aspen-conifer forests. Ecosphere. 3(6):57.

Sudderth E, St Clair SB. 2012. Sensitivity of resource pools and fluxes to dry periods under low and high rain treatments. Ecosphere. 3(8):70.

Smith EA, Collette SB, Boynton TA, Lillrose T, Stevens MR, Bekker MF, Eggett DL, St Clair SB. 2011. Developmental contributions to phenotypic variation in functional leaf traits within quaking aspen clones. Tree Physiology. 31:68-77.

Calder J, Horn K, St Clair SB. 2011. Conifer expansion compromises the competitive ability and herbivore defense of aspen by modifying light environment and soil chemistry. Tree Physiology. 31:582-591.

Salve R, Sudderth E, St Clair SB, Torn M. 2011. Effect of grassland vegetation type on the response of hydrological processes to seasonal precipitation patterns. Journal of Hydrology. 410:51-61.

Swarbreck S, Sudderth E, St Clair SB, Salve R, Cristina C, Torn M, David A, Anderson G. 2011. Linking leaf transcripts levels to whole plant analysis provides mechanistic insights to the impact of warming and altered water availability in an annual grass. Global Change Biology. 17:1577-1594.

Clark A, St Clair SB. 2011. Mycorrhizas and secondary succession in aspen- conifer forests: light limitation differentially affects a dominant early and late successional species. Forest Ecology and Management. 262:203-207.

Smith E, O'loughlin D, Buck J, St Clair SB. 2011. The influences of conifer succession, physiographic conditions and herbivory on quaking aspen regeneration after fire. Forest Ecology and Management. 262:325-330.

St Clair SB, Lynch J. 2010. The opening of Pandora’s Box: climate change impacts on soil fertility and crop nutrition in developing countries. Plant and Soil. 335:101-115.

Calder J, Lifferth G, Moritz M, St Clair SB. 2010. Physiological effects of smoke exposure on deciduous and evergreen tree species. International Journal of Forest Research. 438930:1-7.

Currit N, St Clair SB. 2010. Assessing the impact of extreme climatic events on aspen defoliation using MODIS imagery. Geocarto International. 25:133-147.

St Clair SB, Guyon J, Donaldson J. 2010. Quaking aspen’s current and future status in western North America: the role of succession, climate, biotic agents and its clonal nature. Progress in Botany. 71:371-400.

Book Chapter

Chambers J, Germino M, Belnap J, Brown C, Schupp G, St Clair SB. 2015. Plant Community Resistance to Invasion by Bromus species – the Roles of Community Attributes, Bromus Interactions with Plant Communities, and Bromus Traits. , editor. Exotic Brome-Grasses in Arid and Semiarid Ecosystems of the Western US.


Petersen SL, Kitchen SG, St Clair SB. The influence of fire severity on ecological succession patterns within an aspen-conifer post-fire community. Society for Range Management. Oklahoma City, OK. 2013 .

St Clair SB. Facilitation and competition in aspen forests. Symposium: Resilience in aspen forests. Debeque, Colorado. 2012 .

Buck J, St Clair SB. Altered disturbance patterns promote facilitated competition in aspen-conifer forest. Ecological Society of America. Austin Texas. 2011 .

Horn K, Wilkinson J, White S, St Clair SB. Fire results in increased physiological vigor for surviving Joshua trees (Yucca brevifolia) and creosote bushes (Larrea tridentata) in the Mojave Desert. Ecological Society of America. Austin Texas. 2011 .

Sudderth E, Byrne K, Gherardi L, Placella S, Herman D, St Clair SB. How do linked plant-soil processes affect ecosystem responses to climate change?. Ecological Society of America. Austin Texas. 2011 .

Clark A, St Clair SB. Mycorrhizas and secondary succession in aspen-conifer forests. Ecological Society of America. Austin Texas. 2011 .

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