Activity of Bats in Thinned, Unthinned, and Old-growth Forests in the Oregon Coast Range
Title | Activity of Bats in Thinned, Unthinned, and Old-growth Forests in the Oregon Coast Range PDF eBook |
Author | Marcia Lynn Humes |
Publisher | |
Pages | 118 |
Release | 1996 |
Genre | Bats |
ISBN |
Ten species of bats occur in the Oregon Coast Range and are hypothesized to be associated with late-successional forests. The development of characteristics of late-successional forests in young forest stands can be accelerated through silvicultural practices such as thinning I examined the effects of thinning on the use of forests by bats in the Oregon Coast Range. I used automated ultrasonic detectors to record bat calls in 50- to 100-year-old thinned and =thinned stands as well as in old-growth (2200-year-old) stands in 11 sites in the Oregon Coast Range during the summers of 1994 and 1995. I compared bat activity levels among the 3 stand types. In addition, I classified bat calls into 1 of 5 species groups: Eptes/Las, Myev/vo, Myyu/ca, MythCory, and Mysp. I measured selected vegetation and environmental variables in conjunction with bat activity. I also compared bat activity on roads with activity in the stand interior at 1 site. Bat activity was higher in old growth than in young stands, and higher in thinned than in =thinned stands in 1995 and over both seasons combined. I did not detect a difference in bat activity among stand types in 1994, until I removed 1 site from the analysis. The Mysp and MythCory species groups exhibited differences among stand types. Bat activity along roads was higher than activity within stands. Tree density, tree diameter, tree height, shrub cover, and shrub height varied significantly between old-growth and young stands. Tree density, tree diameter, shrub cover, canopy cover, and crown height varied significantly between thinned and unthinned stands. Bat activity, overall or by species group, was significantly related to structural variables, including mean snag diameter, mean distance from the detector to snags, and percent shrub cover. My results suggest that bats are sensitive to stand structure and that silvicultural practices, such as thinning, which promote development of structural characteristics found in old-growth stands, would benefit bat populations. Further study is needed to clarify the habitat preferences of separate bat species and to specify habitat elements required by bat species.
Bat Conservation
Title | Bat Conservation PDF eBook |
Author | Anna Berthinussen |
Publisher | Pelagic Publishing Ltd |
Pages | 105 |
Release | 2014-05-16 |
Genre | Science |
ISBN | 1784270261 |
This book brings together scientific evidence and experience relevant to the practical conservation of bats. The authors worked with an international group of bat experts and conservationists to develop a global list of interventions that could benefit bats. For each intervention, the book summarises studies captured by the Conservation Evidence project, where that intervention has been tested and its effects on bats quantified. The result is a thorough guide to what is known, or not known, about the effectiveness of bat conservation actions throughout the world. Bat Conservation is the fifth in a series of Synopses that will cover different species groups and habitats, gradually building into a comprehensive summary of evidence on the effects of conservation interventions for all biodiversity throughout the world. By making evidence accessible in this way, we hope to enable a change in the practice of conservation, so it can become more evidence-based. We also aim to highlight where there are gaps in knowledge. Evidence from all around the world is included. If there appears to be a bias towards evidence from northern European or North American temperate environments, this reflects a current bias in the published research that is available to us. Conservation interventions are grouped primarily according to the relevant direct threats, as defined in the International Union for the Conservation of Nature (IUCN)’s Unified Classification of Direct Threats (www.iucnredlist.org/technical-documents/classification-schemes).
Biology of Bats in Douglas-fir Forests
Title | Biology of Bats in Douglas-fir Forests PDF eBook |
Author | Robin E. Christy |
Publisher | |
Pages | 36 |
Release | 1993 |
Genre | Bats |
ISBN |
Forest and Stream Management in the Oregon Coast Range
Title | Forest and Stream Management in the Oregon Coast Range PDF eBook |
Author | Stephen D. Hobbs |
Publisher | |
Pages | 336 |
Release | 2002 |
Genre | Nature |
ISBN |
This major volume presents a wealth of fundamental and applied research on managing Coast Range forest and stream ecosystems. Written primarily for managers and resource specialists, the book will also appeal to policymakers, resource scientists, forest landowners, the conservation community, and students interested in forestry, fisheries, and wildlife sciences.
General Technical Report RMRS
Title | General Technical Report RMRS PDF eBook |
Author | |
Publisher | |
Pages | 842 |
Release | 1998 |
Genre | Forests and forestry |
ISBN |
A Comparison of Bat Activity Among Thinned and Unthinned Second Growth and Old-growth Redwood Stands in Northwestern California
Title | A Comparison of Bat Activity Among Thinned and Unthinned Second Growth and Old-growth Redwood Stands in Northwestern California PDF eBook |
Author | M. J. Mazurek |
Publisher | |
Pages | 74 |
Release | 2002 |
Genre | Bats |
ISBN |
Forest-Based Biomass Energy
Title | Forest-Based Biomass Energy PDF eBook |
Author | Frank Spellman |
Publisher | CRC Press |
Pages | 514 |
Release | 2011-12-07 |
Genre | Nature |
ISBN | 1439860203 |
What is forest-based biomass energy and why should we care? Written by environmental expert Frank Spellman, Forest-Based Biomass Energy: Concepts and Applications details how forest biomass can be converted to energy and energy products, including direct combustion, pellets, gasification, and co-firing. It explores the possibilities of forest-based