Field growth comparisons of invasive alien annual and native perennial grasses in 1 monoculture Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/p8418n92t

This is the author's after peer-review, corrected proof. It contains no copy editing. The published version is copyrighted by Elsevier and can be found here:  http://www.elsevier.com/wps/find/journaldescription.cws_home/622855/description#description. NEWS COVERAGE: A news release based on this journal publication, which is written for a lay audience and has been approved by an author of the study, is available online:  http://bit.ly/bGLB5v

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Throughout the western United States, the invasive annual grass, medusahead (Taeniatherum caput-medusae L. Nevski), is rapidly invading grasslands once dominated by native perennial grasses, such as bluebunch wheatgrass (Pseudoroegneria spicata (Pursh) A). It is also invading grasslands dominated by less undesirable invasive annual grasses, especially cheatgrass (Bromus tectorum L.). Understanding medusahead growth dynamics relative to native perennial grasses and cheatgrass is central to predicting and managing medusahead invasion. We hypothesized that medusahead would have a higher relative growth rate (RGR), a longer period of growth, and as a consequence, more total biomass at the end of the growing season than the native perennial grass and cheatgrass. In 2008 (dry conditions), 250 seeds and in 2009 (wet conditions), 250 and 100 seeds of 25 each species were sown in 1 m2 plots with 5 replicates. Shoots were harvested on 3-25 day intervals throughout the growing season. The native perennial grass had more biomass and higher RGR than medusahead in the dry year, but the relationship was reversed in the wet year. Precipitation in 2008 was well-below average and this level of drought is very infrequent based on historical weather data. Medusahead had a longer period of growth and more total biomass than cheatgrass for both years. We expect that medusahead will continue to invade both native perennial and less undesirable invasive annual grasslands because of its higher RGR and extended period of growth.
Resource Type
DOI
Date Available
Date Issued
Series
Keyword
Rights Statement
Publisher
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2010-11-03T17:50:30Z (GMT). No. of bitstreams: 1 ManglaSeema.FieldGrowthComparisonsofInvasiveAlien.2010.pdf: 334266 bytes, checksum: dc9baa92851f7b2c46d53d81f22adc57 (MD5) Previous issue date: 2010
  • description.provenance : Submitted by Sue Kunda (sue.kunda@oregonstate.edu) on 2010-11-03T17:50:04Z No. of bitstreams: 1 ManglaSeema.FieldGrowthComparisonsofInvasiveAlien.2010.pdf: 334266 bytes, checksum: dc9baa92851f7b2c46d53d81f22adc57 (MD5)
  • description.provenance : Approved for entry into archive by Sue Kunda(sue.kunda@oregonstate.edu) on 2010-11-03T17:50:30Z (GMT) No. of bitstreams: 1 ManglaSeema.FieldGrowthComparisonsofInvasiveAlien.2010.pdf: 334266 bytes, checksum: dc9baa92851f7b2c46d53d81f22adc57 (MD5)

Relationships

In Administrative Set:
Last modified: 07/11/2017

Downloadable Content

Download PDF
Citations:

EndNote | Zotero | Mendeley

Items