To examine bat - habitat relationships, ultrasonic detectors were used to sample bat activity among: old-growth white pine (Pinus strobus ), mature white pine, boreal mixedwood, and selectively-cut white pine stands in central Ontario. Within the stands, bats were sampled in the canopy, the understory layer, and within canopy gaps. Forest structure was measured within each of the stands. The activity of bats was compared among forest stand types, within the stands, and in relation to forest structure. Also, maintaining forest wildlife populations requires data on the use of snags (i.e. dead trees). To provide further resolution of the habitat requirements of forest-dwelling bats, radio telemetry and exit counts were used to investigate the roosting ecology of mouse-eared bats (Myotis lucifugus and M. septentrionalis). Characteristics of snags used by mouse-eared bats were compared with randomly located snags and random geographic points, at three spatial scales (focal tree, surrounding forest, and landscape). (Abstract shortened by UMI.)

This study was undertaken to investigate the status of the american beech as a possible waning species. Contrary to several authors, the results do not suggest a decline in the american beech population. The declines previously indicated probably result from the use of disturbed study sites and incomplete consideration of differences in mortality patterns. The data suggests a stable Beech-Maple forest with neither species experiencing permanent changes in populations. / Department of Biology

Thesis (M.E.S.)--The Evergreen State College, 2007. / Title from title screen (viewed on 1/10/2008). Includes bibliographical references (p. 48-51).

Thesis (M.S.)--Oregon State University, 1990. / Typescript (photocopy). Includes bibliographical references (leaves 82-85). Also available on the World Wide Web.

Thesis (M.S.)--Ohio State University, 2008. / Title from first page of PDF file. Includes bibliographical references (p. 74-79).

Thesis (M.Sc.). / Written for the Dept. of Natural Resource Sciences. Title from title page of PDF (viewed 2009/06/18). Includes bibliographical references.

Thesis (Ph. D.)--University of Idaho, December 2006. / Major professor: Paul E. Gessler. Includes bibliographical references. Also available online (PDF file) by subscription or by purchasing the individual file.

No description available.

Soil organic carbon (SOC) is the largest carbon pool in terrestrial ecosystems, which plays an important role in climate change by regulating atmospheric carbon dioxide. Sweden’s forest management has led to a decrease in old growth forests. This change in land use can affect SOC levels in these forests. This report quantified SOC stocks among different wetness classes in 10 old growth forests across multiple regional environmental gradients in Sweden. I tested for the effects of some different environmental factors on SOC: temperature, precipitation, altitude, stem basal area, latitude, and normalized difference vegetation index. Soil measurements were taken from three different horizons: the O-, E-, and B-horizon. The results showed that the mean SOC stock in old growth forests (5.25 ± 0.60 kg m-2)  is a bit higher than the regional average (4.1 ± 0.5 kg m-2) and that local variation within forests, mainly due to hydrology, appears to drive variation that is often as big or larger than regional variations. There were no significant differences between the different forests, but there were significant differences found between the different wetness classes. There were several correlations found between the different regional environmental factors and SOC stocks. The most prominent relationship was a positive link between the O-horizons’ SOC stocks and temperature (R2adj = 0.58). Overall, these results indicate that SOC stocks in old growth forests are affected by both soil wetness at a local scale and air temperature at a regional scale; and that they might contain a slightly larger amount of SOC than managed forests.

Reference ecosystems are a valuable tool for restoration and management efforts in degraded ecosystems. Longleaf pine (Pinus palustris), a pyrophytic southeastern U.S. ecosystem, have declined precipitously in extent since European settlement. Pine mortality and growth patterns were examined in a 15-year re-measurement study in two old-growth stands. Both stands experienced postire mortality and short-lived decreases in basal area. Distance to nearest neighbor had a significant effect on mortality of small (<10 cm DBH) pine. To better approximate reference conditions, saplings of five co-occurring hardwood species were destructively measured for bark accumulation and taper using bark and wood thickness. Significant species differences were detected in bark:wood ratio (P<0.001), with no difference in wood diameter. Blackjack oak (Quercus marilandica) had a bark:wood ratio 3x the closest species and steeper slopes of bark accumulation, suggesting that it is a fireapted species. These results will inform reference conditions for critical regional pine restoration efforts.