Mowing Reduces Exotic Annual Grasses but Increases Exotic Forbs in a Semiarid Grassland

2014 ◽  
Vol 22 (6) ◽  
pp. 774-781 ◽  
Author(s):  
Janet S. Prevéy ◽  
David G. Knochel ◽  
Timothy R. Seastedt
Keyword(s):  
Semiarid Grassland ◽  
Annual Grasses ◽  
Exotic Annual Grasses

Living with exotic annual grasses in the sagebrush ecosystem

2021 ◽  
Vol 288 ◽  
pp. 112417
Author(s):  
Kirk W. Davies ◽  
Elizabeth A. Leger ◽  
Chad S. Boyd ◽  
Lauren M. Hallett
Keyword(s):  
Sagebrush Ecosystem ◽  
Annual Grasses ◽  
Exotic Annual Grasses

Grazing disturbance promotes exotic annual grasses by degrading soil biocrust communities

2019 ◽  
Vol 30 (1) ◽  
Author(s):  
Heather T. Root ◽  
Jesse E. D. Miller ◽  
Roger Rosentreter
Keyword(s):  
Annual Grasses ◽  
Grazing Disturbance ◽  
Exotic Annual Grasses

Correlations between environmental factors, the biomass of exotic annual grasses and the frequency of native perennial grasses

2006 ◽  
Vol 54 (7) ◽  
pp. 655 ◽  
Author(s):  
Tanja I. Lenz ◽  
José M. Facelli
Keyword(s):  
Species Composition ◽  
Soil Fertility ◽  
Perennial Grass ◽  
Perennial Grasses ◽  
Annual Rainfall ◽  
Grass Species ◽  
Soil Factors ◽  
Annual Grasses ◽  
Exotic Annual Grasses ◽  
Native Perennial Grass

The species composition of temperate grasslands in the mid-north of South Australia has been radically altered from a system dominated by native perennial grasses to a system dominated by Mediterranean annual grasses. This study investigated the importance of chemical and physical soil characteristics, topographical features and climatic variables on the abundance of native and exotic grass species in nine ungrazed grasslands. Overall, climatic and other abiotic factors were highly variable. In addition, past management practices and original species composition are generally unknown, leading to further unexplained variation in the data. On a large spatial scale (among sites), the abundance of exotic annual grasses was positively correlated with mean annual rainfall, and on any scale, with finer soil textures and higher soil organic carbon levels. The most abundant annual grass, Avena barbata (Pott ex Link), was generally associated with soil factors denoting higher soil fertility. The abundance of native perennial grass species was not correlated with any environmental variables at any scale. The various native perennial grass species did not show clear associations with soil factors, although they tended to be associated with factors denoting lower soil fertility. However, at small spatial scales (within some sites) and among sites, the abundances of exotic annual and native perennial grasses were strongly negatively correlated. The results suggest that at the present time, rainfall and soil properties are important variables determining the abundance of annual grasses. The driving variables for the abundance of perennial grasses are less clear. They may be controlled by other factors or extreme rainfall events, which were not surveyed. In addition, they are likely to be controlled by competitive interactions with the annual grasses.

Established Perennial Vegetation Provides High Resistance to Reinvasion by Exotic Annual Grasses

2017 ◽  
Vol 70 (6) ◽  
pp. 748-754 ◽  
Author(s):  
Kirk W. Davies ◽  
Dustin D. Johnson
Keyword(s):  
High Resistance ◽  
Perennial Vegetation ◽  
Annual Grasses ◽  
Exotic Annual Grasses

Spring burns control exotic annual grasses in a temperate grassy woodland

2004 ◽  
Vol 5 (2) ◽  
pp. 131-134 ◽  
Author(s):  
Suzanne M. Prober ◽  
K. R. Thiele ◽  
T.B. Koen
Keyword(s):  
Annual Grasses ◽  
Exotic Annual Grasses

Comment on: Grazing disturbance promotes exotic annual grasses by degrading soil biocrust communities

2020 ◽  
Author(s):  
Rory C. O’Connor ◽  
Matthew J. Germino
Keyword(s):  
Annual Grasses ◽  
Grazing Disturbance ◽  
Exotic Annual Grasses

scholarly journals Rapid Monitoring of the Abundance and Spread of Exotic Annual Grasses in the Western United States Using Remote Sensing and Machine Learning

AGU Advances ◽  
2021 ◽  
Vol 2 (2) ◽  
Author(s):  
Neal J. Pastick ◽  
Bruce K. Wylie ◽  
Matthew B. Rigge ◽  
Devendra Dahal ◽  
Stephen P. Boyte ◽  
...  
Keyword(s):  
United States ◽  
Machine Learning ◽  
Remote Sensing ◽  
Western United States ◽  
Rapid Monitoring ◽  
Annual Grasses ◽  
Exotic Annual Grasses

scholarly journals Grazing Disturbance Promotes Exotic Annual Grasses by Degrading Soil Biocrust Communities

2020 ◽  
Vol 101 (1) ◽  
Author(s):  
Heather T. Root ◽  
Jesse E. D. Miller ◽  
Roger Rosentreter
Keyword(s):  
Annual Grasses ◽  
Grazing Disturbance ◽  
Exotic Annual Grasses

Direct and indirect effects of exotic annual grasses on species composition of a South Australian grassland

2003 ◽  
Vol 28 (1) ◽  
pp. 23-32 ◽  
Author(s):  
Tanja I. Lenz ◽  
Jessica L. Moyle-Croft ◽  
Jose M. Facelli
Keyword(s):  
Species Composition ◽  
Indirect Effects ◽  
Direct And Indirect Effects ◽  
Annual Grasses ◽  
Exotic Annual Grasses
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