Large-Scale Downy Brome Treatments Alter Plant-Soil Relationships and Promote Perennial Grasses in Salt Desert Shrublands Public Deposited

http://ir.library.oregonstate.edu/concern/articles/f1881n58z

To the best of our knowledge, one or more authors of this paper were federal employees when contributing to this work. This is the publisher’s final pdf. The published article is copyrighted by the Society for Range Management and can be found at:  http://www.srmjournals.org/loi/rama.

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Because invasive annual grasses can strongly influence soil resource availability and disturbance regimes to favor their own persistence, there is a great need to understand the interrelationships among invasive plant abundance, resource availability, and desirable species prominence. These interrelationships were studied in two salt desert sites where the local abundance of downy brome (Bromus tectorum L.) varied spatially and increased more than 12-fold over a 3-yr period. We measured downy brome percentage cover, resource availability, and soil chemical and physical properties within 112 plots per site and found significant negative associations between downy brome abundance and both soil water content (P < 0.05; r = -0.27 to -0.49) and nitrate accumulation (P < 0.05; r = -0.34 to -0.45), which corroborated with the direction and strength of multivariate factor loadings assessed with principal component analysis. We then applied factorial combinations of prescribed burning and preemergence herbicide at management-relevant scales (i.e., 6 to 46 ha) as well as biomass removal to smaller plots (12.25 m²) at both sites to determine their impact on downy brome, soil resources, and resident plant species. Burning and herbicide applications, especially when combined, significantly reduced downy brome cover (P = 0.069 to 0.015), which in turn increased soil nitrate accumulation and water content in the spring. Furthermore, for one shrubland site that was seeded 6 yr previously, the combination of burning and herbicide treatments significantly increased perennial grass percentage cover in the 2 yr posttreatment (P < 0.05). Results not only demonstrate the strong relationships between downy brome abundance, soil resources, and residence species for impoverished salt desert shrub ecosystems, but also suggest that restoration and management efforts must include tactics that facilitate resource use by the residual plant community or establish a greater abundance of species capable of high resource acquisition in the spring.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Schantz, M. C., Monaco, T. A., Call, C. A., & Sheley, R. L. (2014). Large-Scale Downy Brome Treatments Alter Plant-Soil Relationships and Promote Perennial Grasses in Salt Desert Shrublands. Rangeland Ecology & Management, 67(3), 255-265. doi:10.2111/REM-D-13-00101.1
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-06-26T20:06:52Z No. of bitstreams: 1 SchantzMerilynnRangelandEcologyManagementLarge-ScaleDowny.pdf: 701551 bytes, checksum: adc9cd9dfd5c21e5c7323b95466eceaa (MD5)
  • description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-06-26T20:07:12Z (GMT) No. of bitstreams: 1 SchantzMerilynnRangelandEcologyManagementLarge-ScaleDowny.pdf: 701551 bytes, checksum: adc9cd9dfd5c21e5c7323b95466eceaa (MD5)
  • description.provenance : Made available in DSpace on 2014-06-26T20:07:12Z (GMT). No. of bitstreams: 1 SchantzMerilynnRangelandEcologyManagementLarge-ScaleDowny.pdf: 701551 bytes, checksum: adc9cd9dfd5c21e5c7323b95466eceaa (MD5) Previous issue date: 2014-05

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items