Record ID No. |
3872 |
Author(s) |
Erik A. Lehnhoff, Lisa J. Rew, Cathy A. Zabinski, Fabian D. Menalled , 2012 |
Affiliation |
Department of Land Resources and Environmental Sciences, Montana State University, 334 Leon Johnson Hall, Bozeman, MT 59717, USA, e-mail: erik.lehnhoff@montana.edu |
Title |
Reduced impacts or a longer lag phase? tamarix in the northwestern U.S.A. |
Source. Vol.(no):Page |
Wetlands, 32 (3): 497-508p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Ecology |
Host |
Tamarix |
Country |
USA, N. America |
Abstracts |
Tamarix spp. (tamarisk) have caused ecological impacts in the southwestern United States; however, such
impacts have not been extensively studied in the Northwest where tamarisk is a relatively new invader. Here we present the results of soil, arbuscular mycorrhizal fungi, and vegetation studies from tamarisk-occupied and unoccupied areas
on the dammed Bighorn River, Fort Peck Reservoir, and the free flowing Yellowstone River, in Montana. Soil sample results indicated that at Fort Peck Reservoir soil salinity was
twice as high at occupied sites compared to unoccupied ones, and at the Bighorn River occupied sites nitrate, phosphorus and potassium were 2.2, 4, and 1.9 times higher, respectively, than at unoccupied sites. No soil differences
were observed on the Yellowstone River. Mycorrhizal infectivity
potential was high in both occupied and unoccupied soils, with a slight reduction (from 73% to 65%colonization) in tamarisk occupied soils. These impactswere statistically but not ecologically significant and did not extend to other metrics of impact such as richness, Simpson’s diversity or composition of plant communities. Our results indicate that either tamarisk has minimal impacts
in the northwest, or it is still in a lag phase. |