Treesearch

The Seedlot Selection Tool and Climate-Smart Restoration Tool are web-based tools designed to match seedlots with planting sites assuming that seedlots are adapted to the past climates in which they evolved, primarily with respect to temperature and aridity. The tools map the climatic match of seedlots with the past or projected climates of planting sites. The challenge is that future climates are a moving target, which means that seedlots must be adapted to the near-term climates as well as the climates of the mid- to late-21st century. Because climate projections are uncertain, the...

Climate change can act to facilitate or inhibit invasions of non-native species. Here, we address the influence of climate change on control of non-native common carp (hereafter, carp), a species recognized as one of the “world’s worst” invaders across the globe. Control of this species is exceedingly difficult, as it exhibits rapid population growth and compensatory density dependence. In many locations where carp have invaded, however, climate change is altering hydrologic regimes and may influence population demography and efficacy of human control efforts. To further evaluate these...

This Proceedings contains the abstracts in English and Spanish of papers presented at the 4th conference on the Madrean Archipeligo held May 14-18, 2018, in Tucson, Arizona. it also contains several full-length papers that expand on the abstracts. The report presents updates on research presently going on in the Madrean Archipeligo region of Arizona, New Mexico, Sonora, and Chihuahua. The region is known as the “Sky Islands” of southern Arizona and New Mexico and the Sierra Madre Occidental of Sonora and Chihuahua. in between the mountain ranges are the grasslands and desert lands that...

This study examined the acceptability of different silvicultural treatments to restore pine barrens, an open, fire-dependent forest landscape type globally imperiled across the northern Great Lakes region of the United States and Canada. In an online survey, we asked family-forest owners (N = 466) in NortheasternWisconsin about the acceptability of pine barrens restoration treatments through ratings of both verbal descriptions and visual scenarios. An informational statement about pine barrens restoration purposes and goals preceded ratings for half the sample. Across the entire sample,...

Environmental DNA (eDNA) analysis can be a powerful tool for the early detection of invasive organisms. However, research on terrestrial eDNA detection from foliage surfaces has been limited. In this study, we developed methods to capture and detect eDNA using qPCR from an invasive forest pest, hemlock woolly adelgid (Adelges tsugae), and three of its biological control predators Leucotaraxis piniperda, Leucotaraxis argenticollis, and Laricobius nigrinus. We designed four highly efficient qPCR assays with a low limit of detection (1–10 copies/reaction). The assay targeting A. tsugae was...

We document the response of a 2 day wildfire smoke event on a moist temperate coniferous old-growth forest in the western U.S. Wildfire smoke increased air temperature and suppressed relative humidity and total incoming radiation. Despite these conditions a ∼10% increase in ecosystem photosynthesis was observed. This was explained by a large increase (41%) in ecosystem-scale stomatal conductance, inferred from measurements of carbonyl sulfide. Increased stomatal conductance contradicts expected stomatal closure at high vapor pressure deficit and was likely caused by an increase in diffuse...

Cities in the Latin America and Caribbean (LAC) region and around the world are setting long-term greening goals that include planting more trees and increasing green cover. Research in LAC cities has mainly focused on biodiversity and vegetation, with little understanding of the mechanisms underlying the decisions through which stakeholders achieve urban greening. Exploring stakeholders’ views about urban forest management and governance can provide us with an opportunity to identify needs and research gaps for urban greening and urban forestry in LAC. To our knowledge, there has never...

Riparian forests across the continental United States are heavily invaded by Amur honeysuckle (Lonicera maackii (Rupr.)), an invasive shrub which suppresses native plants, homogenizes community structure and composition, and alters ecosystem processes. However, no studies have quantified the impacts of honeysuckle removal on forest canopy structure across the first decade of restoration. In this study we used a portable canopy LiDAR (PCL) to characterize the immediate (<1 year), short-term (1–2 years) and long-term (>10 years) impacts of honeysuckle removal on the horizontal and vertical...

Little is known about how spatial literacy influences mapping and decision-making related to environmental management and ecosystem services. We assessed the role of spatial landscape literacy in participatory environmental management and ecosystem service assessments in peri-urban Bogota, Colombia. Spatial landscape literacy (SL) was evaluated by testing stakeholder’s ability to locate specific landscapes and landmarks. We then assessed if opinions on environmental decisions and ecosystem services were significantly related to SL. We used an online instrument to capture 2,397 respondent’s...