Influence of beaver dam density on riparian areas and riparian birds in shrubsteppe of Wyoming

  title={Influence of beaver dam density on riparian areas and riparian birds in shrubsteppe of Wyoming},
  author={Hilary A. Cooke and Steve Zack},
Abstract Through dam-building activity, beavers (Castor canadensis) play an important role in creating pond and wetland habitat for bird communities. Their impact may be intensified in semiarid landscapes and may increase with increasing dam density on a stream. Our objective was to examine relationships between dam density, riparian area characteristics, and the riparian bird community in a semiarid landscape. In 2002 and 2003 we surveyed riparian birds, riparian area characteristics, and the… 

Livestock management, beaver, and climate influences on riparian vegetation in a semi-arid landscape

It is shown that livestock management which emphasizes riparian recovery objectives can be an important precursor to beaver activity and it is described 11–39% increases in floodplain vegetation productivity where conservation-oriented grazing approaches or livestock exclosures and highBeaver activity occur together on low-gradient sites.

Influences of beaver (Castor canadensis) activity on ecology and fish assemblages of dryland streams

Overall, this study provides evidence that, relative to unimpounded stream habitat, beaver ponds in the Verde River basin support abundant smallbodied non-native fishes, which could have negative impacts on co-occurring native fish populations.

Ecology, management, and conservation implications of North American beaver (Castor canadensis) in dryland streams

After near-extirpation in the early 20th century, beaver populations are increasing throughout many parts of North America. Simultaneously, there is an emerging interest in employing beaver activity

Palustrine forested wetland vegetation communities change across an elevation gradient, Washington State, USA

Forest overstory composition changed across the elevation gradient, with broad-leaved trees occupying a distinct hydrologic niche in low-lying areas close to the OHWM, illustrating how rarely flooded, forested WB vegetation differs from frequently flooded, LW vegetation.

A Biodiversity Boost From the Eurasian Beaver (Castor fiber) in Germany’s Oldest National Park

Freshwater ecosystems are among the most threatened ecosystems on the planet. Beavers are important engineers in freshwater ecosystems and reintroduction programs have enabled the recovery of beaver

Multi‐scale environmental filters and niche partitioning govern the distributions of riparian vegetation guilds

Across landscapes, riparian plant communities assemble under varying levels of disturbance, environmental stress, and resource availability, leading to the development of distinct riparian

The impacts of beavers Castor spp. on biodiversity and the ecological basis for their reintroduction to Scotland, UK

The mechanisms by which beavers act as ecosystem engineers are investigated, the possible impacts of beavers on the biodiversity of Scotland are discussed, and a widespread positive influence on biodiversity is expected, if beavers are widely reintroduced.

An Impact Assessment Method of Dam/Sluice on Instream Ecosystem and its Application to the Bengbu Sluice of China

A method is presented for impact evaluation of dams/sluices on their downstream aquatic ecosystems in the absence of detailed long-sequence ecology ecosystem data. It is based on the analysis of

Beaver dams, hydrological thresholds, and controlled floods as a management tool in a desert riverine ecosystem, Bill Williams River, Arizona

Beaver convert lotic stream habitat to lentic through dam construction, and the process is reversed when a flood or other event causes dam failure. We investigated both processes on a regulated



Relating Geomorphic Change and Grazing to Avian Communities in Riparian Forests

Avian conservation in riparian or bottomland forests requires an understanding of the physical and biotic factors that sustain the structural complexity of riparian vegetation and the abundance and diversity of breed- ing birds along the upper Missouri River.

Predicting the impacts of urbanization on riparian bird communities

Breeding Bird Community Composition in Relation to Riparian Vegetation Structure in the Western United States

It is recommended that continuous associations of mesic shrub vegetation be maintained'or restored where possible because this vegetation structure is associated with avian abundance, species richness, riparian-associate bird species abundance, and landscape-level biological diversity.

Beaver ponds create wetland habitat for birds in mountains of southeastern Wyoming

We studied the use of beaver ponds and associated wetlands by ducks and waterbirds on the Laramie Range, Albany County, Wyoming, during 1994. Our goal was to identify physical habital features of


Abstract Although loss of wetlands in southern Appalachia has been especially severe, no avian studies have been conducted in the vestiges of these ecosystems. Our research assessed avian use of


ABSTRACT: Beaver (Castor canadensis) are habitat‐modifying keystone species, and their activities broadly influence many other plants and animals. Beaver are especially important to waterfowl in the

Use of Standardized Visual Assessments of Riparian and Stream Condition to Manage Riparian Bird Habitat in Eastern Oregon

This work evaluated the utility of the riparian zone criteria in three standardized and commonly used rapid visual riparian assessment protocols and found that PFC does not assess obligate riparian bird habitat condition, SVAP provides a coarse estimate, and HAFDS provides the best assessment.

Ecosystem Alteation of Boreal Forest Streams by Beaver (Castor Canadensis)

Beaver (Castor canadensis) alter the structure and dynamics of aquatic ecosystems with a minimum of direct energy or nutrient transfer. Through dam building and feeding activities, beaver act as a

Avian Communities and Habitat Relationships in South Carolina Piedmont Beaver Ponds

Vegetation interspersion, patch evenness, plant richness and total area were most important in explaining abundance of waterfowl, waterbirds, neotropical migrants and woodpeckers, respectively.

Conservation of riparian ecosystems in the United States

Riparian ecosystems include relatively mesic vegetative communities and associated faunas occurring between aquatic and more xeric upland sites and are most obvious in steppe, shrubsteppe, and desert regions.