Treesearch

The elm zigzag sawfly (EZS), Aproceros leucopoda Takeuchi (Hymenoptera: Argidae), is a rapidly spreading invasive defoliator threatening North American elms (Ulmus spp.). Native to East Asia, EZS has established itself across Europe and Russia and was first detected in North America in 2020. Its parthenogenetic reproduction, high fecundity, and multiple dispersal pathways facilitate rapid range expansion and by 2025, EZS had been documented in 14 U.S. states and 4 Canadian provinces. In North America, human-assisted dispersal via vehicles, wood products, and potentially nursery soil may...

The balance between methane producing and methane consuming microorganisms is partially responsible for the magnitude and direction of soil-atmosphere methane fluxes. Therefore, understanding the effects of vegetation and land use on relative abundance, community structure and vertical distribution of methane cycling microorganisms should help us interpret patterns of net emissions of methane. Mountain peatlands in the tropics areabundant and are important in global carbon cycling, but little is known about the communities of methane cycling microorganisms in these ecosystems. We sampled...

Log landings—designated staging areas for logs during timber harvests—can be enriched as habitat for native bees and other pollinator species, turning often degraded areas into local hotspots for biodiversity. Pollinators provide an important ecosystem service for economically important agricultural crops and for trees and plants, but populations are declining due in large part to habitat loss. Enriching soils and seeding native plants on log landings (beyond traditional erosion mitigation practices) can provide pollinator habitat on the modern landscape. This guide provides information...

Aim: We model and map the climatically suitable habitats and migration potential of 326 tree species by combining forest inventories of the United States, Canada and to a lesser extent, Mexico, with the goal of providing a continental perspective of species ranges and migration potential to facilitate better forest stewardship under a changing climate. Location: United States, Canada, and Mexico. Major Taxa Studied: Tree species. Methods: We use a multi-model ensemble technique to assess climatic habitat suitability under current and future climates, and a migration model to compute...

This field note presents an early example of a forest climate adaptation tree planting project incorporating assisted migration in southern New England which is valuable in providing lessons that can inform future work in this region and elsewhere. This effort is notable for moving forward through the implementation and monitoring stages during a period when many similar projects encountered barriers. The project is located on watershed protection forestland owned by the Providence Water Supply Board, a public utility in Rhode Island. Using a suite of tools developed through the Climate...

Flood damage to road-stream crossings presents a safety hazard and is expensive to repair. While crossing structure design has progressed over time to address flood resilience, little research has been conducted to evaluate the performance of culverts and bridges after floods. In 2016, an extreme flood in northwestern Wisconsin created an opportunity to address this knowledge gap.

Managers of northern hardwood forests in the Great Lakes region create gaps in the forest canopy of various sizes during harvesting to achieve different silvicultural objectives. Single-tree harvesting favors recruitment of shade-tolerant tree species by creating small gaps in the canopy, whereas group selection creates larger gaps that can favor shade-intolerant tree species. We evaluated changes in carabid beetle abundance and diversity in harvest-created gaps of five sizes (gap diameters of 6, 10, 20, 30, and 46 m) and uncut forests in northern Wisconsin where sugar maple (Acer saccharum...

Over 7,000 caddisfly specimens, representing 33 species in 10 families, were collected between sunset and sunrise on 12 nights: three nights each during early July and early August in both 2023 and 2024. Collections were made on the southwestern side of Drummond Island along the shoreline of Lake Huron. Sampling occurred for five minutes at 15-minute intervals from near sunset (21:00) to 01:00 and then once again at 03:00 and 05:00. Nocturnal flight periodicity was broadly similar between years and months, with mean caddisfly abundance and species richness peaking at about one hour after...

This resource update contains the findings of a survey conducted on a sample of all primary wood-using mills in Wisconsin. It complements the Forest Inventory and Analysis (FIA) annual inventory of volume and removals. The survey was conducted to determine the amount and source of wood receipts and annual timber product imports/exports. Only primary wood-using mills were surveyed. Primary mills are those that process roundwood in log or bolt form or as chipped roundwood. Examples of industrial roundwood products are saw logs, pulpwood, veneer logs, poles, and logs used for composite board...

This resource update contains the findings of a survey conducted on a sample of all primary wood-using mills in West Virginia. It complements the Forest Inventory and Analysis (FIA) annual inventory of volume and removals. The survey was conducted to determine the amount and source of wood receipts and annual timber product imports/exports. Only primary wood-using mills were surveyed. Primary mills are those that process roundwood in log or bolt form or as chipped roundwood. Examples of industrial roundwood products are saw logs, pulpwood, veneer logs, poles, and logs used for composite...