Investigating Establishment and Impacts of Invasive
Recent research, funded by the Montana Noxious Weed Trust Fund, focuses on understanding environmental factors promoting saltcedar or tamarisk (Tamarix spp.) establishment in Montana and the effects of tamarisk on soil chemistry, plant communities and beneficial soil fungi. This work has been conducted on the Bighorn and Yellowstone Rivers and Fort Peck Reservoir, and in the Montana State University Plant Growth Center. At the field sites, we have collected tree cross-sections for age analysis and soil samples for evaluation of salt accumulation in both tamarisk invaded and un-invaded areas. We have also conducted extensive vegetation analysis at these sites. Plant Growth Center studies focused on determining the effects of storage time and temperature on tamarisk seed viability. In 2010 we will be investigating tamarisk effects on mycorrhizae.
In other ongoing research we are evaluating the long-term impacts of yellow toadflax (Linaria vulgaris) on extant plant communities in four different environments near West Yellowstone, MT. Also, we are conducting vegetation monitoring to determine the long-term effects of disturbances including digging, burning, vegetation clipping and herbicide (Picloram) application on both yellow toadflax and the extant plant community.
Murray JV, Lehnhoff EA, Neve P, Poggio SL and Webber BL (2012). Raising the bar: improving the standard and utility of weed and invasive plant research. New Phytologist, 196:678-680.
Lehnhoff EA, Rew LJ, Zabinski CA and Menalled FD. (on-line) Reduced impacts or a longer lag phase? Tamarix in the northwestern U.S.A. Wetlands.
Lehnhoff E, Menalled F and Rew L (2011) Tamarisk (Tamarix spp.) Establishment in its Most Northern Range. Invasive Plant Science and Management. 4:58-65.
Mangold J. and Lehnhoff EA (revised 2010), Grubb RT, Sheley RL and Carlstrom RD. Saltcedar (Tamarisk). MontGuide MT199710AG.
Maxwell, BD, Lehnhoff, EA and Rew, LJ. 2009. The rationale for monitoring invasive plant populations as a crucial step for management. Invasive Plant Science and Management 1:1-9.
Lehnhoff, EA, Rew, LJ, Maxwell, BD and Taper, ML. (2008). Quantifying invasiveness: A case study of Linaria vulgaris. Invasive Plant Science and Management 1:319-325.
Rew, L.J., Erik A. Lehnhoff and Bruce D. Maxwell. (2007). Non-indigenous species management using a population prioritization framework. Canadian Journal of Plant Science. 87:1029-1036.