Treesearch

Water vapor sorption is a fundamental characteristic of wood as a building material. Apart from empirical prediction, models are often used to interpret the time-dependent process of water vapor uptake (sorption kinetics) and equilibrium states of water in wood (sorption isotherms). This paper summarizes our recent investigations into measurement methods and popular models that are widely used for interpreting these physical phenomena. Commonly used criteria for determining equilibrium moisture content with the dynamic vapor sorption technique yield much larger errors than previously...

1. The colonization of suitable yet unoccupied habitat due to natural dispersal or human introduction can benefit recovery of threatened species. Predicting habitat suitability and conflict potential of colonization areas can facilitate conservation planning.2. Planning for reintroduction of gray wolves (Canis lupus) to the US state of Colorado is underway. Assessing which occupancy sites minimize the likelihood of human-wolf conflict during dispersal events and seasonal movements is critical to the success of this initiative.3. We used a spatial absorbing Markov chain (SAMC) framework,...

Bigseed biscuitroot is a widespread western species, ranging from southern British Columbia to southeastern Manitoba and south to California, Nevada, Utah, Colorado, and South Dakota (Fig. 8 – note this figure includes historic and contemporary herbarium records) (Currah et al. 1983; Lesica 2012; Welsh et al. 2016). In Washington and Oregon, it is much more common east of the Cascade Range (Baker 1956; Hitchcock et al. 1961). In California, it occurs as far south as Kern and San Luis Obispo Counties (Munz and Keck 1973).

Pale agoseris is widely distributed throughout the western United States and Canada (Table 1). In the US, it occurs in all states west of Colorado and in the Dakotas, Minnesota, and Michigan (Baird 2006). Distributions of the two varieties overlap but variety glauca occurs farther south and variety dasycephala occurs farther north. In the states and provinces where their distributions overlap, variety glauca generally occupies lower elevation sites and variety dasycephala higher elevation sites (Hitchcock and Cronquist 2018). The varieties become difficult to distinguish in the northern...

Premise of research. Plants remain underrepresented among species with sequenced mitochondrial genomes (mitogenomes) because of the difficulty in assembly with short-read technology. Invasive species lag behind crops and other economically important species in this respect, resulting in a lack of tools for management and land conservation efforts. Methodology. The mitogenome of Microstegium vimineum, one of the most damaging invasive plant species in North America, was sequenced and analyzed using long-read data, providing a resource for biologists and managers. We conducted analyses of...

Bigflower agoseris occurs in locations west of central Utah. It occurs in southern British Columbia, Washington, Oregon, California, Nevada, Utah, Idaho, and Montana, and is most common in those states bordering the Pacific Ocean (Baird 2006). Variety grandiflora is most common east of the Cascade Mountains and southward on both the east and west side of the Sierra Nevada Mountains to southern California (Fig. 1). Variety leptophylla is most common west of the Cascade Mountains from Vancouver Island through Puget Sound and the Willamette Valley to the Siskiyou-Klamath Mountains of southwest...

Fish invasions threaten native freshwater ecosystems worldwide, yet methods to map biodiversity in data-deficient regions are scarce. Rainbow trout (Oncorhynchus mykiss) and brown trout (Salmo trutta fario) have been introduced to the Himalayan ecoregion where they are sympatric with vulnerable native snow trout Schizothorax plagiostomusand Schizothorax richardsonii. We aim to evaluate potential habitat overlap among snow trout and non-native trout in the Indus and Ganges River basins, Himalayan ecoregion. We transferred maximum entropy (MaxEnt) models developed with spatially continuous...

Our recent contribution to Global Change Biology found that, globally, two-thirds of protected area units and over half of protected land area are unlikely to serve as steppingstones for many species under a warming climate (Parks et al., 2023). In response, Gillingham and Thomas (2023) point to previous evidence that protected areas have acted as steppingstones based on three studies from Great Britain that examined range shifts.Original publication: Parks, Sean A.; Holsinger, Lisa M.; Abatzoglou, John T.; Littlefield, Caitlin E.; Zeller, Katherine A. 2023. Protected areas not likely to...

Context: Native early-successional plants and invasive exotic plants often colonize the same disturbed space and have similar functions, making interactions likely. Knowing whether these interactions are facilitative or competitive across different scales will help determine the influence of such species across a forested landscape. Objective: We evaluated the impacts of an early-successional, nitrogen-fixing native (facilitator), Robinia pseudoacacia, and an allelopathic invasive (inhibitor), Ailanthus altissima, on regeneration, basal area, and diversity of forests at local and regional...

Seed bank compositions provide a record of past disturbances, the legacies of which may last thousands of years. Our goal was to determine if sites defined historically by fire-related (pyrophilic) tree species have seed bank compositions different from sites defined historically by pyrophobic tree species. We selected three 80þ year-old forested sites within the Monongahela National Forest, West Virginia, to represent three pyrophilic zones based on percent-pyrophilic-witness tree cover: Low (0–10%), Medium (40–50%), and High (80–90%). Soil plugs were collected to evaluate the seed bank...