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You searched for: Publication year rev 7989-2011 Remove constraint Publication year rev: 7989-2011 Subject rangelands Remove constraint Subject: rangelands
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1. AGWA: the Automated Geospatial Watershed Assessment tool to inform rangeland management

Author:
Goodrich, David C.; Guertin, D. Phillip; Burns, I. Shea; Nearing, Mark A.; Stone, Jeffry J.; Wei, Haiyan; Heilman, Philip; Hernandez, Mariano; Spaeth, Ken; Paige, Ginger B.; Miller, Scott N.; Kepner, William G.; Ruyle, George; McClaran, Mitchel P.; Weltz, Mark; Jolley, Leonard; Pierson, Fred
Source:
Rangelands 2011 v.33 no.4 pp. 41-47
ISSN:
1551-501X
Subject:
range management; topography; decision support systems; rangelands; watersheds; soil erosion models; watershed hydrology; runoff; water erosion; Arizona
Abstract:
... Do you want a relatively easy to use tool to assess rangeland soil and water conservation practices on rangeland erosion that is specifically designed to use ecological information? Effective rangeland management requires the ability to assess the potential impacts of management actions on soil erosion and sediment yield at both the hillslope and watershed scales. Many of the current tools1 for as ...
Handle:
10113/4008970
DOI:
10.2111/1551-501X-33.4.41

2. Abiotic effects predominate under prolonged livestock-induced disturbance

Author:
ELDRIDGE, DAVID J.; VAL, JAMES; JAMES, ALEX I.
Source:
Austral ecology 2011 v.36 no.4 pp. 367-377
ISSN:
1442-9985
Subject:
disturbed soils; livestock; long term effects; rangelands; reptiles; soil crusts; vascular plants
Abstract:
... Despite the widespread recognition that disturbance by livestock affects multiple indices of landscape health, few studies have examined their effects on both biotic and abiotic processes. We examined the effects of livestock disturbance on soil, vascular plants and reptiles across a disturbance gradient in a semi-arid Australian woodland. Our gradient ranged from long-ungrazed water remote sites, ...
DOI:
10.1111/j.1442-9993.2010.02159.x

3. Adaptation behaviour of local and rangeland cattle relocated to a temperate agricultural pasture

Author:
D. T. Thomas; M. G. Wilmot; R. W. Kelly; D. K. Revell
Source:
Animal production science 2011 v.51 no.12 pp. 1088-1097
ISSN:
1836-0939
Subject:
animal growth; average daily gain; beef cattle; heifers; markets; pastures; rangelands; weight gain; zebu; Western Australia
Abstract:
... Relocating cattle from rangeland properties to agricultural pastures in southern Western Australia allows producers to improve year-round continuity of feed supply in their beef cattle businesses, and can reduce substantially the time taken to grow animals to meet market specifications. In this study the behaviour and growth of two groups of young cattle that were sourced from different locations ...
DOI:
10.1071/AN11044

4. Additive partitioning of rarefaction curves: Removing the influence of sampling on species-diversity in vegetation surveys

Author:
K. Clarke; M. Lewis; B. Ostendorf
Source:
Ecological indicators 2011 v.11 no.1 pp. 132-139
ISSN:
1470-160X
Subject:
data collection; inventories; monitoring; rangelands; sampling; species diversity; surveys; vegetation; South Australia
Abstract:
... Vegetation surveys collect species-diversity information, a potentially valuable ecological indicator. However, the number of species recorded by vegetation surveys is influenced by several factors including inherent species-diversity, sampling method and sampling effort. The process of rarefaction is commonly used to control for variation in sampling effort. We aimed to use a combination of raref ...
DOI:
10.1016/j.ecolind.2010.07.002

5. Agriculture’s impact on microbial diversity and associated fluxes of carbon dioxide and methane

Author:
Levine, Uri Y.; Teal, Tracy K.; Robertson, G. Philip; Schmidt, Thomas M.
Source:
ISME journal 2011 v.5 no.10 pp. 1683-1691
ISSN:
1751-7370
Subject:
agricultural land; carbon dioxide; emissions; greenhouse gases; heterotrophs; land use change; metabolism; methane; methane production; methanotrophs; oxidation; rangelands; soil bacteria; surveys; Midwestern United States
Abstract:
... Agriculture has marked impacts on the production of carbon dioxide (CO2) and consumption of methane (CH4) by microbial communities in upland soils—Earth's largest biological sink for atmospheric CH4. To determine whether the diversity of microbes that catalyze the flux of these greenhouse gases is related to the magnitude and stability of these ecosystem-level processes, we conducted molecular sur ...
Handle:
10113/54092
DOI:
10.1038/ismej.2011.40
PubMed:
21490688
PubMed Central:
PMC3176513

6. Allometry of root branching and its relationship to root morphological and functional traits in three range grasses

Author:
J. Tulio Arredondo; Douglas A. Johnson
Source:
Journal of experimental botany 2011 v.62 no.15 pp. 5581-5594
ISSN:
0022-0957
Subject:
Agropyron desertorum; Bromus tectorum; Pseudoroegneria spicata; allometry; branching; functional properties; rangelands; root growth; roots; soil nutrients
Abstract:
... The study of proportional relationships between size, shape, and function of part of or the whole organism is traditionally known as allometry. Examination of correlative changes in the size of interbranch distances (IBDs) at different root orders may help to identify root branching rules. Root morphological and functional characteristics in three range grasses {bluebunch wheatgrass [Pseudoroegner ...
DOI:
10.1093/jxb/err240
PubMed:
21868398
PubMed Central:
PMC3223053

7. Animal and Vegetation Response to Modified Intensive–Early Stocking on Shortgrass Rangeland

Author:
Harmoney Keith R.; Jaeger John R.
Source:
Rangeland ecology & management 2011 v.64 no.6 pp. 619-624
ISSN:
1550-7424
Subject:
animals; average daily gain; beef; biomass; grazing; pastures; rangelands; vegetation; Kansas
Abstract:
... A comparison of animal gains and vegetation trends was made from 2002–2008 between a continuous season-long stocking (SLS) system and a modified intensive–early stocking system (IES) with late-season grazing (IES 1.6× ++ 1; 1.6 times the number of animals of the SLS system from May 1 to July 15, and 1 times the number of animals of SLS from July 15 to October 1) on shortgrass native rangeland of w ...
DOI:
10.2111/REM-D-10-00149.1

8. Application of a conceptual framework to interpret variability in rangeland responses to atmospheric CO2 enrichment

Author:
Polley, H.W.; Morgan, J.A.; Fay, P.A.
Source:
Journal of agricultural science 2011 v.149 no.1 pp. 1-14
ISSN:
0021-8596
Subject:
carbon dioxide; carbon dioxide enrichment; climate; ecosystems; homeostasis; plant response; prediction; primary productivity; rangelands; soil
Abstract:
... Plant productivity and other ecosystem processes vary widely in their responses to experimental increases in atmospheric carbon dioxide (CO2) concentration. A conceptual framework first suggested by Chapin et al. (1996) was adapted to address the question of why CO2 effects on primary productivity vary so greatly among rangelands and among years for a given ecosystem. The ‘interactive controls’ fr ...
DOI:
10.1017/S0021859610000717

9. Are environmental factors important facilitators of pompom weed (Campuloclinium macrocephalum) invasion in South African rangelands?

Author:
Jeremy Goodall; Ed T. F. Witkowski; Craig D. Morris; Lesley Henderson
Source:
Biological invasions 2011 v.13 no.10 pp. 2217-2231
ISSN:
1387-3547
Subject:
crop-weed competition; defoliation; ecosystems; environmental factors; fires; forbs; grasses; grasshoppers; grazing; herbivores; invasive species; natural enemies; pastures; plant adaptation; rain; rangelands; roads; soil texture; sustainable agriculture; sward; topography; vegetation cover; weeds; wetland plants; wetlands; South Africa
Abstract:
... The absence of natural enemies being keystone to the success of invasive alien plants (IAPs) can only be accepted once all the factors governing the invader and the ecosystems it invades have been established. Few studies have attempted this approach. This study reports on the relations between the invasive alien forb Campuloclinium macrocephalum (Less.) DC. (pompom weed), herbivory and the ecolog ...
DOI:
10.1007/s10530-011-0035-6

10. Are we "missing the boat" on preventing the spread of invasive plants in rangelands

Author:
Davies, Kirk W.; Johnson, Dustin D.
Source:
Invasive plant science and management 2011 v.4 no.1 pp. 166-171
ISSN:
1939-747X
Subject:
invasive species; rangelands; colonizing ability; weed control; plant communities; control methods; ecological restoration; attitudes and opinions; seed dispersal; competitive exclusion; species diversity; planning
Abstract:
... Invasive plants are negatively affecting the ecological and economic production of rangelands by reducing resource productivity, decreasing biodiversity, displacing native vegetation, and altering ecosystem processes and functions. However, despite these well-known negative effects, once invasive plants are regionally established, limited effort is directed at preventing their continued spread acr ...
Handle:
10113/49768
DOI:
10.1614/IPSM-D-10-00030.1

11. Areas and Greenhouse Gas Emissions from Feed Crops Not Used in Canadian Livestock Production in 2001

Author:
J. A. Dyer; X. P. C. Vergé; S. N. Kulshreshtha; R. L. Desjardins; B. G. McConkey
Source:
Journal of sustainable agriculture 2011 v.35 no.7 pp. 780-803
ISSN:
1540-7578
Subject:
biofuels; crops; databases; diet; feedstocks; greenhouse gas emissions; greenhouse gases; irrigated farming; land use; livestock; livestock and meat industry; livestock production; models; rangelands; Canada
Abstract:
... Estimates of greenhouse gas (GHG) emissions from Canada's four main livestock industries were integrated with the Canadian Economic and Emissions Model for Agriculture (CEEMA) which operates at the census district level. The livestock crop complex (LCC), which defines the crop area required to feed Canada's livestock, was disaggregated from provincial to district level. The LCC areas were subtract ...
DOI:
10.1080/10440046.2011.606493

12. Assessing Resource Dependency on the Rangelands as a Measure of Climate Sensitivity

Author:
N. A. Marshall
Source:
Society & natural resources 2011 v.24 no.10 pp. 1105-1115
ISSN:
0894-1920
Subject:
attitudes and opinions; business enterprises; climate; climate change; economic systems; grazing lands; rangelands; Queensland
Abstract:
... Climate change is altering the quality and availability of natural resources with far-reaching implications for resource users and the extensive social and economic systems that they support. Those who are particularly dependent on a climate sensitive resource will be especially sensitive to climate changes. Measuring resource dependency is key to understanding the sensitivity of resource users to ...
DOI:
10.1080/08941920.2010.509856

13. Assessing conservation opportunity on private land: Socio-economic, behavioral, and spatial dimensions

Author:
Christopher M. Raymond; Gregory Brown
Source:
Journal of environmental management 2011 v.92 no.10 pp. 2513-2523
ISSN:
0301-4797
Subject:
ecological value; basins; income; family farms; managers; rangelands; analysis of variance; recreation; farmers; gender; farming systems; private lands; honors and awards; surveys; vegetation; land restoration; indigenous species; education; conservation areas; farm size
Abstract:
... This study presents a method for assessing conservation opportunity on private land based on landholders' socio-economic, behavioral, and farm characteristics. These characteristics include age, gender, education, level of off-farm income, farm size, proportion of remnant native vegetation on-farm, and ecological value of native vegetation on-farm. A sample of landholders who own greater than 2 ha ...
DOI:
10.1016/j.jenvman.2011.05.015
PubMed:
21664035

14. Assessing the Use of Functional Diversity as a Measure of Ecological Resilience in Arid Rangelands

Author:
Verónica Chillo; Madhur Anand; Ricardo A. Ojeda
Source:
Ecosystems 2011 v.14 no.7 pp. 1168-1177
ISSN:
1432-9840
Subject:
biogeochemical cycles; ecosystems; experimental design; functional diversity; grazing; rangelands; soil; species diversity
Abstract:
... It is becoming more apparent that species richness alone many not be sufficient to fully understand ecosystem resilience but that functional diversity (diversity of species having similar effects on an ecosystem process) may be more relevant. In particular, response diversity (diversity of species that respond differently to disturbance) within functional groups (FG) is suggested to be critical fo ...
DOI:
10.1007/s10021-011-9475-1

15. Assessing the influence of resource covariates at multiple spatial scales: an application to forest-dwelling caribou faced with intensive human activity

Author:
Mathieu Leblond; Jacqueline Frair; Daniel Fortin; Christian Dussault; Jean-Pierre Ouellet; Réhaume Courtois
Source:
Landscape ecology 2011 v.26 no.10 pp. 1433-1446
ISSN:
0921-2973
Subject:
Rangifer tarandus caribou; calving; deciduous forests; habitats; humans; landscapes; lichens; models; rangelands; roads; spring; summer; temporal variation; wetlands; winter; woodlands; Canada
Abstract:
... Efforts in isolating the relative effects of resources and disturbances on animal-distribution patterns remain hindered by the difficulty of accounting for multiple scales of resource selection by animals with seasonally dynamic drivers. We developed multi-scale, seasonal models to explore how local resource selection by the threatened forest-dwelling woodland caribou (Rangifer tarandus caribou) w ...
DOI:
10.1007/s10980-011-9647-6

16. Assessing the susceptibility of semiarid rangelands to wildfires using Terra MODIS and Landsat Thematic Mapper data

Author:
Chen, Fang; Weber, Keith T.; Anderson, Jamey; Gokhal, Bhushan
Source:
International journal of wildland fire 2011 v.20 no.5 pp. 690-701
ISSN:
1049-8001
Subject:
periodicity; grasses; image analysis; moderate resolution imaging spectroradiometer; photosynthetically active radiation; fuel loading; rangelands; models; wildfires; vegetation cover; wildland fire use; forage; remote sensing; Landsat; temperature; biomass; Idaho
Abstract:
... In order to monitor wildfires at broad spatial scales and with frequent periodicity, satellite remote sensing techniques have been used in many studies. Rangeland susceptibility to wildfires closely relates to accumulated fuel load. The normalised difference vegetation index (NDVI) and fraction of photosynthetically active radiation (fPAR) are key variables used by many ecological models to estima ...
DOI:
10.1071/WF10001

17. An Assessment of State-and-Transition Models: Perceptions Following Two Decades of Development and Implementation

Author:
Corrine N. Knapp; Maria E. Fernandez-Gimenez; David D. Briske; Brandon T. Bestelmeyer; X. Ben Wu
Source:
Rangeland ecology & management 2011 v.64 no.6 pp. 598-606
ISSN:
1551-5028
Subject:
ecoregions; ecosystems; expert opinion; land evaluation; managers; models; professionals; range management; rangelands; researchers; terminology; United States
Abstract:
... State and transition models (STMs) are being developed for many areas in the United States and represent an important tool for assessing and managing public and private rangelands. Substantial resources have been invested in model development, yet minimal efforts have been made to evaluate the utility of STMs for rangeland assessment and management. We interviewed 47 rangeland professionals, equal ...
Handle:
10113/57971
DOI:
10.2111/rem-d-10-00188.1

18. An Assessment of State-and-Transition Models: Perceptions Following Two Decades of Development and Implementation

Author:
Knapp Corrine N.; Fernandez-Gimenez Maria E.; Briske David D.; Bestelmeyer Brandon T.; Wu X. Ben
Source:
Rangeland ecology & management 2011 v.64 no.6 pp. 598-606
ISSN:
1550-7424
Subject:
decision making; ecoregions; ecosystems; expert opinion; managers; models; professionals; rangelands; researchers; terminology; United States
Abstract:
... State-and-transition models (STMs) are being developed for many areas in the United States and represent an important tool for assessing and managing public and private rangelands. Substantial resources have been invested in model development, yet minimal efforts have been made to evaluate the utility of STMs for rangeland assessment and management. We interviewed 47 rangeland professionals, equal ...
DOI:
10.2111/REM-D-10-00188.1

19. Assessment of charcoal driven deforestation rates in a fragile rangeland environment in North Eastern Somalia using very high resolution imagery

Author:
S.M. Oduori; F. Rembold; O.H. Abdulle; R. Vargas
Source:
Journal of arid environments 2011 v.75 no.11 pp. 1173-1181
ISSN:
0140-1963
Subject:
Panthera tigris; charcoal; deforestation; environmental impact; image analysis; rangelands; regrowth; satellites; trees; vegetation; Somalia
Abstract:
... Multi-temporal very high resolution satellite images and field work have been used for quantifying the tree cutting rate over a 5 years period in a very arid tiger bush area of North Eastern Somalia with intensive charcoal production activities. By applying both a classical area frame sampling approach with visual interpretation of the samples and a semi-automatic tree detection algorithm, it was ...
DOI:
10.1016/j.jaridenv.2011.05.003

20. The Biology of Canadian Weeds. 147. Onopordum acanthium L

Author:
Cavers, Paul B.; Qaderi, Mirwais M.; Threadgill, Paul F.; Steel, Marion G.
Source:
Canadian journal of plant science 2011 v.91 no.4 pp. 739-758
ISSN:
0008-4220
Subject:
Onopordum acanthium; biotypes; cattle; dormancy; forage; fruits; gardens; goats; gravel; grazing; habitats; honey; humans; hybrids; longevity; noxious weeds; oils; phenology; rangelands; sheep; soil; vegetables; Antarctica; Asia; Australia; British Columbia; Ontario; United States
Abstract:
... In Canada, Scotch thistle, Onopordum acanthium L. (Asteraceae) is primarily a weed of well-drained natural areas and ruderal habitats such as abandoned gravel pits. It is classed as a noxious weed in Ontario and the North Okanagan region of British Columbia but is common only in southern Ontario. Native to southern Europe and southwestern Asia, it has been introduced to almost 50 countries in all ...
DOI:
10.4141/cjps10195