Treesearch

This resource update contains the findings of a survey conducted on a sample of all primary wood-using mills in Michigan. 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 Delaware. 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 Connecticut. 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...

Community-based conservation (CBC) emerged in the 1980s as part of a paradigm shift from unpeopled protected areas to people-centered efforts to connect conservation and development. Although well intentioned, the change prompted a focus on communities as either passive subjects or secondary participants of mostly top-down, externally-initiated interventions - many which framed people as separate from nature and, therefore, as a threat to it. As conservationists embrace a new paradigm first characterized by geologists as the "Anthropocene," conservation priorities and successes increasingly...

Density management diagrams (DMDs) are a fundamental forest management tool. However, these tools were primarily developed for even-aged stands and may not incorporate important site effects. Accommodating different stocking constraints during stand development across broad ranges of site effects could help tailor reforestation and thinning prescriptions to local conditions. For that purpose, this report introduces a set of site-sensitive DMDs for managing both even- and uneven-aged California mixed-conifer stands. By consulting maps of aridity and nitrogen deposition summarized by...

We used national forest inventory data from Michigan, Minnesota, and Wisconsin, U.S.A. to produce estimates of the annual areal extent of wind disturbance for 2005–2018. Our results indicate that at least for wind in the region, including the panel of plots assigned to the inventory year coincident with the disturbance year produces estimates that are lower than estimates computed with that specific inventory year excluded. We attributed this result to partial observation of disturbance for that year, a situation that arises from the operational necessity of a year or more being required...

Background. Fuel treatments are increasingly used to mitigate wildfire risks. Aims. Proposing a novel, scalable and transferable methodology, this study investigates which treatment is (more) effective at a regional scale. Methods. This research evaluates the effectiveness of fuel treatments in California forests using the Fuel Treatment Effectiveness Monitoring (FTEM) database, which provides a binary (yes/no) assessment of treatment efficacy based on a structured subjective evaluation process. Proposed methodology enables scaling up site-specific treatment outcomes to the regional level....

A timber frame with mass ply lam (MPL) beams and columns and a timber buckling restrained brace (TBRB) was subjected to cyclic loads according to the AISC qualification procedure for conventional buckling restrained braces (BRB). The TBRBs met the requirements for qualification of conventional BRBs; the steel core reached a maximum strain of 3.l% in both tension and compression and the braced frame reached a maximum drift ratio of 4.5%. A numerical OpenSees model of a single-story timber frame with a TBRB was built and validated by TBRB component tests and MPL beam-column joint tests with...

Tropical forests are a dominant regulator of the global carbon cycle, exchanging more carbon dioxide with the atmosphere than any other terrestrial biome. Climate models predict unprecedented climatic warming in tropical regions in the coming decades; however, in situ field warming studies are severely lacking in tropical forests. Here we present results from an in situ warming experiment in Puerto Rico, where soil respiration responses to +4 oC warming were assessed half-hourly for a year. Soil respiration rates were 42- 204% higher in warmed relative to ambient plots, representing some...

General understanding of disease epiphytotics caused by introduced agents (pathogens) in forest systems, as well as the ability to assess risk of future introductions within a process-barrier framework of biological invasion, are impeded by a lack of systematically compiled information on origins and functional traits of pathogens that have become established outside their range. To address these gaps, substantially update previous registries, and provide critical biosecurity information, we assembled a list of established forest phytopathogens that are present, but not thought to be...