Correlation of the Local Distributions of Dipodomys microps and D. merriami and of the Annual Grass Bromus rubens

1964 ◽  
Vol 9 (2) ◽  
pp. 56 ◽  
Author(s):  
Richard H. Rowland ◽  
Frederick B. Turner
Keyword(s):  
Annual Grass ◽  
Bromus Rubens ◽  
Dipodomys Microps

Relationships of Native Desert Plants with Red Brome (Bromus rubens): Toward Identifying Invasion-Reducing Species

2011 ◽  
Vol 4 (1) ◽  
pp. 115-124 ◽  
Author(s):  
Scott R. Abella ◽  
Donovan J. Craig ◽  
Lindsay P. Chiquoine ◽  
Kathryn A. Prengaman ◽  
Sarah M. Schmid ◽  
...  
Keyword(s):  
Mojave Desert ◽  
Native Species ◽  
Strongly Correlated ◽  
Annual Grass ◽  
Desert Ecosystems ◽  
Red Brome ◽  
Bromus Rubens ◽  
Competitive Abilities ◽  
Practical Implications

AbstractThe interactions between native and exotic species occur on a continuum from facilitative to competitive. A growing thrust in invasive species science is differentiating where particular native species occur along this continuum, with practical implications for identifying species that might reduce the invasibility of ecosystems. We used a greenhouse experiment to develop a competitive hierarchy of 27 native species with red brome, an invasive annual grass in the arid lands of the southwestern United States, and a field study to assess in situ responses of brome to native perennial species in the Mojave Desert. Native species most competitive with brome in the competition experiment included the annuals Esteve's pincushion and western fiddleneck and the perennials eastern Mojave buckwheat, sweetbush, and brittlebush, which reduced brome biomass to 49 to 70% of its grown-alone amount. There was no clear difference in competitive abilities with brome between annual and perennial natives, and competiveness was not strongly correlated (r = 0.15) with the biomass of the native species. In the field, sweetbush and brittlebush supported among the least cover of brome, suggesting congruence of the strong early competitive abilities of these species with in situ patterns of brome distribution. At the other extreme, brome attained its highest average cover (19%) below littleleaf ratany, significantly greater than all but 3 of the 16 species evaluated. Cover by brome was only weakly related (r = 0.19) to the area of the perennial canopy, suggesting that factors other than the sizes of perennial plants were linked to differences in brome cover among species. Results suggest that (1) interactions with brome differ substantially among native species, (2) these interactions are not as closely linked to biomass production as in more temperate regions, and (3) there is potential for identifying native species that can reduce invasion of desert ecosystems.

Cover–biomass relationships of an invasive annual grass, Bromus rubens, in the Mojave Desert

2020 ◽  
pp. 1-5
Author(s):  
Scott R. Abella
Keyword(s):  
Aboveground Biomass ◽  
Mojave Desert ◽  
Invasive Plant ◽  
Plant Biomass ◽  
Percent Cover ◽  
Regression Equations ◽  
Annual Grass ◽  
Bromus Rubens ◽  
Regression Slopes ◽  
Study Sites

Abstract Estimates of plant biomass are helpful for many applications in invasive plant science and management, but measuring biomass can be time-consuming, costly, or impractical if destructive sampling is inappropriate. The objective of this study was to assess feasibility of developing regression equations using a fast, nondestructive measure (cover) to estimate aboveground biomass for red brome (Bromus rubens L.), a widespread nonnative annual grass in the Mojave Desert, USA. At three study sites, including one measured for three consecutive years, B. rubens cover spanned 0.1% to 85% and aboveground biomass 1 to 321 g m−2. In log10-transformed linear regressions, B. rubens cover accounted for 68% to 96% of the variance in B. rubens biomass among sites, with all coefficients of determination significant at P < 0.05. For every doubling of percent cover, biomass was predicted to increase by 78%, 83%, and 144% among the three sites. At the site measured for three consecutive years, which ranged in rainfall from 65% to 159% of the long-term average, regression slopes each year differed from other years. Regression results among sites were insensitive to using cover classes (10 classes encompassing 0% to 100% cover) compared with simulated random distribution of integer cover within classes. Biomass of B. rubens was amenable to estimation in the field using cover, and such estimates may have applications for modeling invasive annual plant fuel loads and ecosystem carbon storage.

Landscape restoration in southern California forblands: Response of abandoned farmland to invasive annual grass control

2005 ◽  
Vol 53 (3) ◽  
pp. 237-245 ◽  
Author(s):  
EDITH B. ALLEN ◽  
ROBERT D. COX ◽  
TRACY TENNANT ◽  
SHEILA N. KEE ◽  
DOUGLAS H. DEUTSCHMAN
Keyword(s):  
Southern California ◽  
Annual Grass ◽  
Landscape Restoration ◽  
Abandoned Farmland

Herbicides for Postemergence Control of Annual Grass Weeds in Seedling Forage Grasses

Weed Science ◽  
1989 ◽  
Vol 37 (3) ◽  
pp. 375-379 ◽  
Author(s):  
Thomas J. Peters ◽  
Russell S. Moomaw ◽  
Alex R. Martin
Keyword(s):  
Warm Season ◽  
Big Bluestem ◽  
Forage Grasses ◽  
Annual Grass ◽  
Cool Season ◽  
Intermediate Wheatgrass ◽  
Green Foxtail ◽  
Annual Grasses ◽  
Large Crabgrass ◽  
Warm Season Grasses

The control of three summer annual grass weeds with herbicides during establishment of forage grasses was studied near Concord and Mead, NE, in 1984, 1985, and 1986. Three cool-season forage grasses, intermediate wheatgrass, tall fescue, and smooth bromegrass, and two warm-season grasses, big bluestem and switchgrass, were included. The control of three major summer annual grasses, green foxtail, barnyardgrass, and large crabgrass, was excellent with fenoxaprop at 0.22 kg ai/ha. Slight to moderate injury to cool-season forage grasses and severe injury to warm-season grasses were evident. Sethoxydim at 0.22 kg ai/ha and haloxyfop at 0.11 kg ai/ha controlled green foxtail and large crabgrass, but not barnyardgrass. Sulfometuron-treated big bluestem and switchgrass plots had the best forage stand frequencies and yields and, at the rate used, sulfometuron satisfactorily controlled green foxtail but only marginally controlled barnyardgrass and large crabgrass.

The Effects of Parental CO2 and Offspring Nutrient Environment on Initial Growth and Photosynthesis in an Annual Grass

2001 ◽  
Vol 162 (3) ◽  
pp. 617-623 ◽  
Author(s):  
T. E. Huxman ◽  
T. N. Charlet ◽  
C. Grant ◽  
S. D. Smith
Keyword(s):  
Initial Growth ◽  
Annual Grass ◽  
Nutrient Environment
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