Introduced species can impact native communities by altering competition dynamics. Large exotic species, such as the horse (Equus caballus), may have a competitive advantage over smaller and could exclude them from access to limited resources. Our objective was determine influence of on use water in semi-arid environment where availability is limited. From July 2010 August 2011, we used remote cameras monitor sources Great Basin Desert horses had drinking were excluded (with fencing) compare...

Abstract The horse ( Equus caballus ) is a feral ungulate that currently exceeds target population sizes in many areas of western North America. Horses are behaviorally dominant over native ungulates and outcompete the latter for access to water sources. However, better understanding broader spatial temporal implications horse‐induced competition on by will enable conservation management species. Our objective was determine whether pronghorn Antilocapra americana mule deer Odocoileus...

Salmon are crucial to the environmental, cultural, and economic health of western North America from California Arctic. Robust resilient Pacific salmon populations that support thriving ecosystems, Indigenous rights cultures, local economies require effective ongoing stewardship. However, many fisheries in crisis. Our communities working hard toward recovery but need additional assistance achieve resiliency. At same time, rapid climate change is making our path success more difficult.

Predator–prey interactions are influenced by the ability of parties to visually perceive each other. Changes in moonlight across lunar cycle may influence visibility predator and prey how they interact with other access shared resources (e.g. water sources desert). We tested three competing hypotheses explaining nocturnal activity mammalian at desert (i.e. predation risk allocation hypothesis, visual acuity physiological need for hypothesis). used camera traps Great Basin Desert monitor...

Anthropogenic modifications to landscapes intended benefit wildlife may negatively influence communities. provisioning of free water (water developments) enhance abundance and distribution is a common management practice in arid regions where limiting. Despite the long-term widespread use developments, little known about how they native species. Water developments arid-adapted species (e.g., kit fox, Vulpes macrotis) by enabling water-dependent competitors coyote, Canis latrans) expand...

This study addressed the effects that cheatgrass (Bromus tectorum) had on populations of North American deermouse (Peromyscus maniculatus) at Antelope Island State Park, Davis County, Utah. Linear regression revealed a significant negative relationship between cover and relative abundance deermice. These results concur with conclusions others suggesting negatively impacts rodents.Este estudio consideró los efectos que Bromus tectorum impone las poblaciones de Peromyscus maniculatus en el...

Applying machine learning methods to geographic data provides insights into spatial patterns in the as well assists interpreting and describing environments. This paper investigates results of k-means clustering applied 51 geospatial layers, selected scaled for a model outdoor acoustic environments, continental United States. Silhouette elbow analyses were performed identify an appropriate number clusters (eight). Cluster maps are shown described, using correlations between layers...

Several methods exist to capture ground-nesting birds, yet questions remain concerning their effectiveness, cost and safety. An experiment was conducted comparing traps commonly used shorebirds. Data were collected on Snowy Plovers (Charadrius nivosus) nesting at Great Salt Lake, Utah during the 2009 breeding season. The three most common (spring trap, walk-in funnel leg-hold noose mats) compared in time required use trap (e.g. install nest), success construction costs. These results...

Abstract Hunting pressure alters the spatial ecology of many ungulate species. During hunting periods, game species often select areas that have reduced hunter accessibility by increasing use forest cover, remaining farther from roads, or moving to private land as a means refuge. Our objectives were determine if elk ( Cervus canadensis ) in central Utah, USA, shifted distribution towards refuge (private land) response and whether allocating permits could reduce selection refugia elk. We...

Cheatgrass (Bromus tectorum) is an invasive annual known to negatively impact many shrub-dependent organisms; however, relatively little research has examined how it affects snake communities. Bromus tectorum abundant at Antelope Island State Park, Davis County, Utah, and could be a possible threat populations. Study sites representing different B. coverage percentages were established measure relative abundance of snakes. Snakes captured from June September 2005 primarily by using funnel...

Abstract Climate change is predicted to create increasingly arid deserts with fewer and smaller water sources. Because free already limiting for arid-adapted animals, reductions in likely will impact desert species how they compete this limited resource. Our objective was examine the size of sources influenced competition between 2 ecologically similar bats, Parastrellus hesperus Myotis californicus, American Southwest. Bats are a highly successful taxon deserts, although many rely upon...

Abstract The kit fox Vulpes macrotis is a species of concern to land managers in the Great Basin Desert North America. Once common, foxes have declined from historical levels. Research on western Utah has spanned nearly 70 y and potential inform management conservation within Central Range Ecoregion Desert. We conducted systematic literature review northern subspecies V. m. nevadensis. focused studies Ecoregion, which represents majority Desert, provided comprehensive summary their ecology...

Abstract Free water can influence the ecology of desert species. While use free is influenced by physiological factors (e.g., species‐specific requirements, moisture in forage, temperature), nonphysiological factors, such as habitat characteristics and interspecific interactions, are also important. In fact, for species concern, interactions be important influencing their spatial temporal landscape its resources. The kit fox ( Vulpes macrotis ) a small carnivore considered to concern over...

The rapid launch cadence of SpaceX’s Falcon 9 rocket provides the opportunity to study relative consistency noise radiation. Acoustical measurements several launches have been made on and near Vandenberg Space Force Base within 1 km pad. This paper compares collocated mid-field from different missions begin understand data variability as a function environmental conditions. One location 395 m pad has measured over 5 times. comparative analysis includes time-varying levels, spectra, waveform...

The rapid launch cadence of SpaceX’s Falcon 9 rocket provides the opportunity to study relative consistency far-field noise propagation. Acoustical measurements several launches have been made on and near Vandenberg Space Force Base at a location 8.4–14 km from pad. This paper compares collocated different missions begin understand data variability as function environmental conditions locations. 8.4 has measured over 10 times, whereas other locations span subsets launches. comparative...

Coyotes (Canis latrans) and kit foxes (Vulpes macrotis) are desert canids that share ecological similarities, but have disparate histories with anthropogenic pressure may influence their responses towards novel stimuli. We used remote cameras to investigate response stimuli for these two species. predicted coyotes (heavily pressured species) would be more wary on unprotected land (canid harvest activities permitted) than in protected areas not permitted), whereas (less exhibit no difference....