Skip to main content
Advanced Search

Filters: Tags: Community dynamics (X)

24 results (22ms)   

Filters
Date Range
Extensions
Types
Contacts
Categories
Tag Types
Tag Schemes
View Results as: JSON ATOM CSV
thumbnail
These heatmaps show a top 3 invasive and problematic plant stressor for riparian areas in the Chihuahuan Desert, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor across the landscape. Symbology represents the percentage of participants with 0% = dark green, 0.0001 % - 24.99% = light green, 25% - 49.99% = yellow, 50% - 74.99% = orange, 75% - 100% = red. All counties and municipalities identified by participants as areas where they work were given a tally for each of the top 3 stressors that participants chose. Counties with a small number of participants were not adjusted for small sample size. These results were...
thumbnail
Our proposal addresses Funding Category Ill by evaluating natural resource management practices and adaptation opportunities. More specifically, our project addresses Science Need #6 to improve monitoring and inventory of watersheds and ecosystems (including invasive species). Our proposed study will occur within the Southern Rockies Landscape Conservation Cooperative (LCC) (upper Virgin River, UT) and the Desert LCC (lower Virgin River, AZ and NVL and therefore will be submitting to both cooperatives. Invasive saltcedar (Tamarix spp.) is the third most abundant tree in Southwestern riparian systems (Friedman et al. 2005). Resource managers must often balance the management goals of protecting wildlife species and...
Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2012, AZ-01, AZ-02, AZ-03, AZ-04, All tags...
thumbnail
Introduction: Tamarisk (Tamarix spp., also saltcedar) is a non-native tree introduced to the United States during the 19th century as an ornamental species and solution to erosion in the American West (Robinson 1965). Tamarisk can form dense monotypic stands, which have been linked to a decline in richness and diversity of native plants (Engel-Wilson & Ohmart 1978; Lovich et al. 1994) and wildlife (Anderson et al. 1977; Durst et al. 2008) in riparian areas. As a result, natural resource managers have invested millions of dollars to control tamarisk (Shafroth & Briggs 2008). Few studies have conducted community-level analyses to document the impact of one of these methods, the introduction of a native enemy or predator,...
Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2012, AZ-01, AZ-02, AZ-03, AZ-04, All tags...
thumbnail
A combination of altered fire regimes and pathogens has contributed towards densification and encroachment by shade-tolerant species into areas traditionally dominated by whitebark pine. As such, the CMP Hi5 Working Group technical team suggest canopy cover as a proxy for species encroachment. Stands with tree cover greater than 60% suggest successional species are outcompeting whitebark pine.
State-and-transition models are increasingly being used to guide rangeland management. These models provide a relatively simple, management-oriented way to classify land condition (state) and to describe the factors that might cause a shift to another state (a transition). There are many formulations of state-and-transition models in the literature. The version we endorse does not adhere to any particular generalities about ecosystem dynamics, but it includes consideration of several kinds of dynamics and management response to them. In contrast to previous uses of state-and-transition models, we propose that models can, at present, be most effectively used to specify and qualitatively compare the relative benefits...
thumbnail
These heatmaps show a top 3 invasive animal stressor for riparian areas in the Chihuahuan Desert, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor across the landscape. Symbology represents the percentage of participants with 0% = dark green, 0.0001 % - 24.99% = light green, 25% - 49.99% = yellow, 50% - 74.99% = orange, 75% - 100% = red. All counties and municipalities identified by participants as areas where they work were given a tally for each of the top 3 stressors that participants chose. Counties with a small number of participants were not adjusted for small sample size. These results were shared via a...
thumbnail
These heatmaps show a top 3 invasive animal stressor for grasslands in the Chihuahuan Desert, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor across the landscape. Symbology represents the percentage of participants with 0% = dark green, 0.0001 % - 24.99% = light green, 25% - 49.99% = yellow, 50% - 74.99% = orange, 75% - 100% = red. All counties and municipalities identified by participants as areas where they work were given a tally for each of the top 3 stressors that participants chose. Counties with a small number of participants were not adjusted for small sample size. These results were shared via a webinar...
thumbnail
This data release is composed of seven datasets regarding colonial seabirds and forage fish at two seabird nesting colonies on Gull and Chisik Islands in lower Cook Inlet, Alaska. These data were collected to detect changes in the breeding population of Black-legged Kittiwakes and Common Murres on two nesting colonies in lower Cook Inlet and to compare those counts to baseline counts from 1995-1999. They are part of an ongoing study in lower Cook Inlet, Alaska to assess the recent status of forage fish and seabirds (2000-2020).
A 20-year set of cover data on sagebrush semi-desert plant communities responding to wildfire and livestock grazing near Mills in central Utah provided an opportunity to compare the assumptions and adaptability of classical and state-and-transition models for describing secondary succession. Cover data were organized and analyzed by plant species, growth forms, and other ground cover classes. Graphical analysis, ordination (employing semi-strong hybrid multi-dimensional scaling), regression, and analysis-of-variance were used to determine whether the patterns observed were best described as community change (tightly linked species) or individualistic change (each species acting independently). Distinct differences...
thumbnail
Delivering adequate water supplies to support expanding human enterprise while maintaining the necessary flow regimes to support desired riparian ecosystems and formally protected wildlife species that depend upon them is increasingly difficult in the arid western United States. Many riparian systems have undergone dramatic alteration over the last 50 - 100 years, exacerbating the conflicts between resource use and biodiversity protection. One of the most visible changes that is in part due to altered flow regimes is the establishment of invasive plant species in riparian ecosystems. The highest priority invasive riparian plant is the Eurasian tree/shrub, tamarisk (or saltcedar, Tamarix spp.) the third most abundant...
Categories: Data, Project; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2012, AZ-01, AZ-02, AZ-03, AZ-04, All tags...
thumbnail
These heatmaps show a top 3 invasive and problematic plant stressor for montane areas in the Chihuahuan Desert, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor across the landscape. Symbology represents the percentage of participants with 0% = dark green, 0.0001 % - 24.99% = light green, 25% - 49.99% = yellow, 50% - 74.99% = orange, 75% - 100% = red. All counties and municipalities identified by participants as areas where they work were given a tally for each of the top 3 stressors that participants chose. Counties with a small number of participants were not adjusted for small sample size. These results were...
thumbnail
These heatmaps show a top 3 invasive and problematic plant stressor for grasslands in the Chihuahuan Desert, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor across the landscape. Symbology represents the percentage of participants with 0% = dark green, 0.0001 % - 24.99% = light green, 25% - 49.99% = yellow, 50% - 74.99% = orange, 75% - 100% = red. All counties and municipalities identified by participants as areas where they work were given a tally for each of the top 3 stressors that participants chose. Counties with a small number of participants were not adjusted for small sample size. These results were shared...
thumbnail
These heatmaps show a top 3 invasive animal stressor for montane areas in the Chihuahuan Desert, as ranked by participants, and the concentration of participants who reported as working in each municipality or county who also voted for that stressor across the landscape. Symbology represents the percentage of participants with 0% = dark green, 0.0001 % - 24.99% = light green, 25% - 49.99% = yellow, 50% - 74.99% = orange, 75% - 100% = red. All counties and municipalities identified by participants as areas where they work were given a tally for each of the top 3 stressors that participants chose. Counties with a small number of participants were not adjusted for small sample size. These results were shared via a...
thumbnail
Many of North America’s most rapidly declining avifauna breed in the boreal and alpine ecosystems of Alaska. Joint Base Elmendorf-Richardson (JBER) located in Anchorage, Alaska, provides critical nesting habitat for five avian Species of Special Concern (SOSC): Solitary Sandpiper Tringa solitaria, Lesser Yellowlegs Tringa flavipes, Olive-sided Flycatcher Contopus cooperi, Rusty Blackbird Euphagus carolinus and Blackpoll Warbler Setophaga striata. Joint Base Elmendorf-Richardson derived the Species of Special Concern list from the Birds of Conservation Concern (USFWS 2008) and the Department of Defense Mission-Sensitive Priority Bird Species (DoD PIF 2015) lists. Department of Defense Partners in Flight recognizes...
thumbnail
Amphibians and reptiles (herpetofauna) have been linked to specific microhabitat characteristics, microclimates, and water resources in riparian forests. Our objective was to relate variation in herpetofauna abundance to changes in habitat caused by a beetle used for Tamarix biocontrol (Diorhabda carinulata; Coleoptera: Chrysomelidae) and riparian restoration. During 2013 and 2014, we measured vegetation and monitored herpetofauna via trapping and visual encounter surveys (VES) at locations affected by biocontrol along the Virgin River in the Mojave Desert of the southwestern United States. Twenty-one sites were divided into four riparian stand types based on density and percent cover of dominant trees (Tamarix,...
Categories: Data, Publication; Types: Citation, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: 2012, AZ-01, AZ-02, AZ-03, AZ-04, All tags...
This project will engage researchers from the University of Idaho to assist with a set of analysis tasks that will improve understanding of seabird population dynamics and environmental drivers at a regional scale based on prior survey efforts that have been focused at a colony scale. Specifically, we envision the development of a population model for a couple of index species like murres and kittiwakes, including evaluation of spatial clustering of populations that co-vary, in order to: 1) asses implications of covariates with identified mechanisms and appropriate temporal (pre-breeding condition, summer, rearing, overwinter survival, etc.) and spatial scales; 2) evaluate the feasibility of combining seabirds into...
thumbnail
The GCP LCC Steering Committee tasked the GCP LCC Science Team to reduce to 25 a list Surrogate Species (from a long list of Priority, and Focal Species) for use in conservation planning. Step one (1) would be to identify and retain a contractor to compile all identified conservation species lists, organize these lists of species, and condense these lists for the GCP LCC. The contractor would use existing species lists (e.g., Federal, State, Joint Ventures, Fish Habitat Partnerships, The Nature Conservancy, etc.) provided by the Science Team and other sources; the format and reduction through the use of Science team collaboration and specific criteria would be documented and summarized by the contractor. This process...
thumbnail
We used an individual-based plant simulation model that represents intra- and inter-specific competition for water availability, which is represented by a process-based soil water balance model. For dominant plant functional types, we quantified changes in biomass and characterized agreement among 52 future climate scenarios. We then used a multivariate matching algorithm to generate fine-scale interpolated surfaces of functional type biomass for our study area.


map background search result map search result map From Genotype to River Basin: The combined impacts of climate change on bio-control on a dominant riparian invasive tree/shrub (Tamarisk spp.) Effects of Bio-Control and Restoration on Wildlife in Southwestern Riparian Habitats Final Report: Effects of Biocontrol and Restoration on Wildlife in Southwestern Riparian Habitats Publication: The effects of riparian restoration following saltcedar (Tamarix spp.) biocontrol on habitat and herpetofauna along a desert stream Develop Priority, Focal and Surrogate Species Lists Invasive Animal Stressors for Grasslands in the Chihuahuan Desert Invasive and Problematic Plant Stressors for Grasslands in the Chihuahuan Desert Invasive Animal Stressors for Riparian Areas in the Chihuahuan Desert Invasive and Problematic Plant Stressors for Riparian Areas in the Chihuahuan Desert Invasive and Problematic Plant Stressors for Montane Areas in the Chihuahuan Desert Invasive Animal Stressors for Montane Areas in the Chihuahuan Desert Assessing the Status and Trends of Seabirds and Forage Fish in Lower Cook Inlet, Alaska Divergent climate change effects on widespread dryland plant communities driven by climatic and ecohydrological gradients Whitebark Pine- Interspecific Competition Common Murre Disturbance Data on Gull Island, Kachemak Bay, Alaska Alaska Joint Base Elmendorf-Richardson Installation Avian Study 2007-Present Alaska JBER Avian Survey Data 2007-Present Assessing the Status and Trends of Seabirds and Forage Fish in Lower Cook Inlet, Alaska Common Murre Disturbance Data on Gull Island, Kachemak Bay, Alaska Alaska Joint Base Elmendorf-Richardson Installation Avian Study 2007-Present Alaska JBER Avian Survey Data 2007-Present Effects of Bio-Control and Restoration on Wildlife in Southwestern Riparian Habitats Final Report: Effects of Biocontrol and Restoration on Wildlife in Southwestern Riparian Habitats Publication: The effects of riparian restoration following saltcedar (Tamarix spp.) biocontrol on habitat and herpetofauna along a desert stream From Genotype to River Basin: The combined impacts of climate change on bio-control on a dominant riparian invasive tree/shrub (Tamarisk spp.) Whitebark Pine- Interspecific Competition Invasive Animal Stressors for Grasslands in the Chihuahuan Desert Invasive and Problematic Plant Stressors for Grasslands in the Chihuahuan Desert Invasive Animal Stressors for Riparian Areas in the Chihuahuan Desert Invasive and Problematic Plant Stressors for Riparian Areas in the Chihuahuan Desert Invasive and Problematic Plant Stressors for Montane Areas in the Chihuahuan Desert Invasive Animal Stressors for Montane Areas in the Chihuahuan Desert Develop Priority, Focal and Surrogate Species Lists Divergent climate change effects on widespread dryland plant communities driven by climatic and ecohydrological gradients