Factors affecting species distribution and coexistence in the Colorado shortgrass steppe

  • 163 Pages
  • 0.71 MB
  • English
Wheatgrasses., Grasses -- Colorado., Forage plants -- Colo
Statementby Michael R. Sackschewsky.
The Physical Object
Paginationxii, 163 leaves, bound :
ID Numbers
Open LibraryOL16624511M

Project Methods This collaborative venture builds on a long history of collaborations in grassland ecology work, dating back to when CSU and ARS signed a Memorandum of Understanding for collaborative studies to be conducted at the CPER under the International Biological Program (IBP).

Since then, ARS and CSU have collaborated on numerous grassland research. Factors Influencing Patterns of Cattle Graz- ing Behavior on Shortgrass Steppe R.L.

SENFT, L.R. RITTENHOUSE, AND R.G. WOODMANSEE Abstract Factors hzfluencing distribution of free-roaming cattle were stu- died on shortgrass steppe in northeastern Colorado.

Spatial units Cited by: Factors affecting species distribution predictions: A simulation modeling experiment Article (PDF Available) in Ecological Applications 15(2) April with Reads How we measure.

Annual growth rings are well-defined in some shrubby species distributed along the Patagonian steppe and provide useful information to identify the environmental factors that influence the radial.


Description Factors affecting species distribution and coexistence in the Colorado shortgrass steppe FB2

Identifying the factors that affect species’ distributions is an important unresolved issue in ecology (Araújo and Guisan, ).Often there are many combinations of predictors that can explain distributions equally well, especially when environmental factors are correlated, and this introduces uncertainty over the effect of each factor (Freedman,Graham, Cited by:   The purpose of this Shortgrass Steppe Long Term Ecological Research (SGS LTER) Project is to conduct long-term experiments that will evaluate population dynamics of key animal and plant species; land-atmosphere exchange of primarily water, C, and energy; and biogeochemical cycling of primarily C and N.

Competition and Related Mechanisms to Explain Species Coexistence. A number of alternatives have been proposed to explain coexistence and diversity when classic niche theory fails (Barot, ; Wildová et al., ).Under this emergent scenario, classic ideas on competition are being reshaped in a more mechanistic framework giving new perspectives that reconcile neutral and niche Cited by: Carbon exchange and species composition of grazed pastures and exclosures in the shortgrass steppe of Colorado Daniel R.

LeCaina,∗, Jack A. Morgana, Gerald E. Schumanb, Jean D. Reedera, Richard H.

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Hartb a United States Department of Agriculture-Agricultural Research Service, Crops Research Laboratory, Center Ave., Fort Collins, COUSA. This study examines the establishment patterns of exotic and ruderal species along trail corridors in grassland areas of the Colorado Front Range.

The effects of trail presence, trail age, and trail traffic levels on exotic and ruderal species establishment are explored to ascertain the potential impacts of trails on surrounding by:   Insects provide essential ecological services in both the natural environment and in human-dominated habitats.

Because pollinator declines associated with land use change have been reported across the globe, there is great concern that pollinators and the ecosystem services they provide will be negatively affected. This study examines the diversity and abundance of bee pollinators in Cited by: This suggests that other factors such as initial species distribution, recruitment history, competitive interactions, or grazing patterns may also play a role in this landscape, although a related study has demonstrated that the two grass species avoid competition by differential use of soil water both spatially and temporally (Buxbaum, ).Cited by: Location: Shortgrass steppe, North American Great Plains, Colorado (40°49′N, °46′W), USA.

Methods: Ungrazed and grazed early-seral (4–6 yr) and mid-seral (18–20 yr) seeded fields (Conservation Reserve Program) and traditionally grazed native steppe were compared for effects on plant composition in relation to changes expected from.

We evaluated the relationship between annual forage production and annual and seasonal precipitation and temperature at a shortgrass steppe site in north—central Colorado using a long—term data set (52 yr).

We also constructed a relationship between forage production and aboveground net primary production (ANPP).Cited by:   Species Richness. We recorded a greater diversity of ground-dwelling spiders than previously reported for the shortgrass steppe (Kumar et al. ; Table 2).In the 2-yr study, we collected spiders belonging to nine families, 20 genera and 37 were five species collected in the grass habitat only, whereas nine were unique to the mixed-grass/shrub by: Abstract.

Annual bluegrass (Poa annua var. reptans (Hausskn.)Timm.) is a weedy species that is a component of most close-cut, irrigated fairways. Research was conducted to determine the effect of five management factors and their interactions on the species composition of a mixed stand of annual bluegrass and creeping bentgrass (Agrostis palustris Huds.) maintained at 13 mm.

Soil was an. Colorado Biodiversity Scorecard. Following the three-part model of “effective conservation” developed by The Nature Conservancy, our scorecard evaluated the status of each plant, animal or ecological system under three broad categories: 1) Biodiversity status – including abundance and quality; 2) Threat status – focused on both current and potential future impacts; and 3) Protection.

Introduction. Ecosystem invasibility is governed by a complex collection of biotic and abiotic factors including environmental conditions, disturbance regimes and responses of native species to those regimes, as well as the biotic resistance provided by the resident community (Lonsdale ; Richardson & Pysek ).Biotic resistance is especially important in limiting the magnitude of Cited by: Start studying Bio Chapter 21 and Learn vocabulary, terms, and more with flashcards, games, and other study tools.

Search. steppe, and veldt are different names for the biome known as. there are few species in the oceanic zone than in the neurotic zone because the oceanic zone. The Colorado College State of the Rockies Report Card.

The Colorado River Basin: Agenda for Use, Restoration, and Sustainability for the Next Generation. About the Author: Natalie Triedman (Colorado College class of ‘12) is a Student Researcher for the State of the Rockies Size: 2MB. Escaping the extinction vortex: identifying factors affecting population performance and recovery in endangered Sierra Nevada bighorn sheep Chair: L.

Scott Mills An extinction vortex is one of the greatest threats to endangered species; when demographic, environmental, and genetic stochasticity interact with each other and withFile Size: 2MB.

U.S. SAGEBRUSH STEPPE AND PATAGONIAN STEPPE PETER B. ADLER,1,4 DANIEL G. MILCHUNAS,2 OSVALDO E. SALA,3 INGRID C. BURKE,1,2 AND WILLIAM K. LAUENROTH1,2 1Graduate Degree Program in Ecology, Colorado State University, Fort Collins, Colorado USA 2Department of Forest, Rangeland, and Watershed Stewardship, Colorado State University.

Invasive species are a severe problem world-wide.

Details Factors affecting species distribution and coexistence in the Colorado shortgrass steppe EPUB

While con- trol or eradication are usually the ultimate goals, in many cases scientists lack even basic information about the biology and ecolo- gy of invasive species. Knowledge of the distribution of a species with respect to. title = "Grassland species loss resulting from reduced niche dimension", abstract = "Intact ecosystems contain large numbers of competing but coexisting species.

Although numerous alternative theories have provided potential explanations for this high biodiversity, there have been few field experiments testing between these by: when competition between two species causes a change in habit to access a wider range of resources; this may include accessing suboptimal resources density independent causes These are factors that affect a population, but are not affected by the population itself.

Distribution Patterns. Organisms have different patterns of where they live on the globe. The territory a species lives in is called its distribution, which just means where in the world that species naturally example, the distribution of polar bears is the Arctic Circle, and the distribution of koalas is eastern and southern Australia.

The distribution of one (Marshallagia) out of five endoparasite genera was concentrated mostly in steppic areas whereas other species were found also in other areas. In wild hosts the distribution of Marshallagia was much larger from Sptizberg to New World (northern territories in Canada or Cited by: Graduate Thesis Or Dissertation Geographic variation in distribution and cover of principle native and non-native plant species along gradients of topography, climate, and disturbance in protected-area sagebrush steppe communities of the Columbia Plateau Public Deposited.

Variation in reproductive phenology among species is an important mechanism for maintaining species coexistence. In mixed forests, the impact of limiting (biotic and abiotic) factors on tree reproductive success regulates the maintenance of species in balanced proportions or the conversion towards monospecific forests.

This study offer a significant first approach to the Cited by: 1. Table Species groups based on a spectrum of sagebrush habitat characteristics and preferences in the assessment area.

31% and 61% habitat in sagebrush smaller patches spectrum of patch sizes ok larger patches edge or ecotone either edge or interior ok interior patchy shrub distribution range of shrub distribution patterns ok uniform shrub. Sensitive Animal Species Inventory on the INL Sagebrush Steppe Ecosystem Reserve Novem 2 Management Goal 1 Maintain and protect existing high quality biological, cultural and tribal resources.

Management Goal 2 Provide for long-term resource management, plan implementation and development of educational opportunities.

Abstract. Plant functional traits provide one tool for predicting the effects of grazing on different ecosystems.

To test this approach, we compared plant traits and grazing response across analogous climatic gradients in sagebrush steppe, USA (SGBR), known to have a short evolutionary history of grazing, and Patagonian steppe, Argentina (PAT), where generalist herbivores exerted stronger.

The Mammals of Colorado: An Account of the Several Species Found Within the Boundaries of the State, Together with a Record of Their Habits and of Their Distribution [Warren, Edward Royal] on *FREE* shipping on qualifying offers.

The Mammals of Colorado: An Account of the Several Species Found Within the Boundaries of the State, Together with a Record of Author: Edward Royal Warren.The book is structured around four key topics: biotic interactions in the soil; plant community effects; the role of aboveground consumers; and the influence of species gains and losses.

A concluding chapter draws together this information and identifies a number of cross-cutting themes, including consideration of aboveground-belowground.