More than 40 years have passed since Shafer (1969) challenged the existence of the “average
camper.” Recognizing that participants in recreation activities are heterogeneous in their
commitments and interests, researchers have emphasized the importance of differentiating
users into meaningful homogeneous subgroups. In his seminal article, Bryan (1977) coined
the concept...
During the summer of 1971, diurnal patterns of water status were monitored in Acer circinatum. Measurements of transpiration rate, internal moisture stress, and relative leaf resistance were used to characterize
the water status of the tree. For the days examined, the diurnal and seasonal
fluctuations of water status in relation...
Preliminary results of a comprehensive study of hydraulic fluctuations in Douglas-fir (Pseudotsuga menziesii) stems in response
to plant water status and environment are presented. Diurnal changes in stem circumference near DBH of a dominant Douglas-fir were monitored using automated band dendrometers. Measurements of transpiration rate, internal moisture stress and stomata...
Chronic overcapacity has been identified as a major cause of the overfishing of Europe’s fish stocks and
the poor economic performance of the European fishing fleets. Mechanisms are needed to ensure that the
capacity of European fishing fleets remain proportionate to available fish stocks. To that end, the
European Commission...
Fires affect animals mainly through effects on their habitat. Fires often cause short-term increases in wildlife foods that contribute to increases in populations of some animals. These increases are moderated by the animals’ ability to thrive in the altered, often simplified, structure of the postfire environment. The extent of fire...
Common methods for assessment of surface checking in decorative plywood panels rely on manual handling and visual inspection of specimens, a laborious procedure practically limiting the number of materials and variables that may be considered within one project. In this study, a new automated optical method for detection and measurement...
A new density variable, empirically corrected for pressure, is constructed. This is done by first fitting compressibility (or sound speed) computed from global ocean datasets to an empirical function of pressure and in situ density (or specific volume). Then, by replacing true compressibility by this best-fit virtual compressibility in the...
Surface water abstraction from rivers for irrigated agriculture is one of the largest uses of freshwater resources in the world. Water abstraction has important impacts on the structure of riverine assemblages. However, little work has examined the chronic, season-long impacts on ecosystem functions. Invertebrate drift is an important ecosystem function...