Treesearch

Floral volatile organic compounds (VOCs) are traits that influence plant interactions with pollinators and other species. Interspecific and intraspecific variation in traits can strongly influence community and ecosystem processes. Yet, we lack an understanding of patterns of variation in floral VOCs among individuals of a species and across species at the community-level across years, and the degree to which phylogenetic relatedness among species influences these patterns. Such an understanding is crucial to accurately interpret more complex patterns and predict consequences for pollinatio...

The long-legged flies (Dolichopodidae) of the island of Montserrat in the Lesser Antilles have been surveyed and include 63 species in 27 genera. The following eleven new species are described and illustrated: Amblypsilopus marskeae sp. nov., Medetera iviei sp. nov., Medetera montserratensis sp. nov., Systenus ladonnae sp. nov., Thrypticus mediofuscus sp. nov., Chrysotus antillensis sp. nov., Chrysotus callichromoides sp. nov., Chrysotus interfrons sp. nov., Chrysotus montserratensis sp. nov., Diaphorus robinsoni sp. nov., and Sympycnus montserratensis sp. nov. Six species have only been...

The context within which family forest owners operate is constantly changing due to many internal and external factors. Many emerging social, economic, environmental, and technological changes could have profound effects on family forest owners and their land in the future. This paper explores a possible transformative technological change: A "Coming Age of Wood" in which a large number of technological innovations in wood products result in a significant increase in the use of woodbased materials throughout the global economy, substituting for a significant share of non-renewable materials...

Ecologists now recognize that the classical theory of population and community ecology is severely limited by its inability to represent the efffects of individual adaptive behavior, but we are still looking for ways to accommodate adaptive behavior in models and theory. This issue is important because the behavior of individuals can strongly affect the responses of animal populations to habitat restoration and other alterations of the environment, as well as to direct interactions with people. This meeting review describes a series of talks that addressed how mechanistic individual-based...

Pseudogymnoascus destructans colonizes the wing membrane of hibernating bats with the potential to form dense fungal hyphae aggregates within cupping erosions. These fungal cupping erosions emit a characteristic fluorescent orange-yellow color when the wing membrane is transilluminated with 385 nm UV light. The purpose of this study was to create and validate the R package, countcolors, for quantifying the distinct orange–yellow ultraviolet (UV) fluorescence in batwing membrane lesions caused by P. destructans. Validation of countcolors was completed by first quantifying the percent area...

Effective modelling of forest susceptibility to defoliating insect outbreaks requires a better understanding of outbreak dynamics, which includes detailed knowledge of the pre- and post-outbreak forest status as well as subsequent feedback mechanisms. In this paper, we strive to fill the forest status need by combining archived Landsat sensor data (pre- and post-outbreak) with different formats and dates of the U.S. Forest Service's Forest Inventory and Analysis (FIA) data (periodic [1970s, 1990s] and annual [2003–2006]). Specifically, we explore the utility of these FIA ground data for...

The "NTFPs from Trees" factsheet series explains uses, markets, status, and management implications for several tree species valued for nontimber forest products. **Species status information has been revised to reflect updated data (June 2021).**

We explore a common feature of insect population dynamics, interspecific synchrony, which refers to synchrony in population dynamics among sympatric populations of different species. Such synchrony can arise via several possible mechanisms, including shared environmental effects and shared trophic interactions, but distinguishing the relative importance among different mechanisms can be challenging. We analyze interannual time series of population densities of the larch budmoth, Zeiraphera griseana (Lepidoptera: Tortricidae), along with six sympatric larch-feeding folivores from a site in...

This report examines the nation’s legal, institutional, and economic capacity to promote forest conservation and sustainable resource management through a set of 10 indicators associated with criterion 7 of the Montréal Process criteria and indicators framework. Specifically, we considered (1) legislation and policies, (2) cross-sectoral coordination, (3) taxation and incentives, (4) property rights and land tenure, (5) law enforcement, (6) programs and services, (7) research and technology, (8) partnerships, (9) public participation and conflict resolution, and (10) monitoring and...

Body condition scoring systems and body condition indices are common techniques used for assessing the health status or fitness of a species. Body condition scoring systems are evaluator dependent and have the potential to be highly subjective. Body condition indices can be confounded by foraging, the effects of body weight, as well as statistical and inferential problems. An alternative to body condition scoring systems and body condition indices is using a stable isotope such as deuterium oxide to determine body composition. The deuterium oxide dilution method is a repeatable, quantitativ...