Treesearch

FIA data from FVS-ready tables packaged with FIADB (Shaw and Gagnon 2020) were used in FFE-FVS to establish prefire carbon pools and fuel loading for trees (live and dead), herbs and shrubs, woody fuels, litter, and duff. FFE was then used to simulate immediate fire effects - tree mortality, fuel consumption, and changes in carbon pools resulting from three wildland fire scenarios (fig. 1). GHG fire emissions were calculated as the product of fuel consumption from the FFE-FVS simulations and pollutant emission factors.

Precommercial thinning is commonly used in mixed conifer forests of the inland northwest region of the U.S. It is widely understood to increase diameter growth of crop trees, and on some sites can also elicit a height growth response, but growth models are needed to quantify these effects. In principle, FVS-IE can capture PCT effects through reductions in crown competition factor (CCF). However, the model was calibrated to reflect gradual, mortalitydriven reductions in CCF as opposed to abrupt changes from active management. Additionally, diameter and height growth are linked in both the...

FVSOnline runs in the free version of the R-Shiny server: https://posit.co/download/shiny-server/. That version does not support secure network traffic, that is, only http and not https protocols are supported. Therefore, we use the Apache web server to provide https service and enable Apache to route traffic between the public network and the R-Shiny server which is set to only accept connections from “localhost” (fig 1). The server we use is running Ubuntu Server 22.0 4 LTS on a 32 core Intel-based Dell computer. The management of software and a user’s project spaces is accomplished...

Canada has a large proportion of public lands whose management falls under the jurisdiction of provincial and territorial governments. Since the 1970s, provincial and territorial agencies have been developing growth models for their own needs, making the Canadian modelling landscape a diversified one (fig. 1). Two variants of FVS are currently being used, one in Ontario and the other in British Columbia.

With forest-based climate mitigation increasingly cited as a way to reduce greenhouse gas emissions, forest management tools that are used to assess and anticipate the impact of alternative management scenarios on carbon storage and sequestration, such as the Forest Vegetation Simulator (FVS), should accurately and precisely represent forest responses to changing climate. An extension of FVS called Climate-FVS (Crookston et al. 2010) relies on estimates of climatic suitability derived from species-level environmental envelopes to modify demographic processes, such as expected tree growth....

Management and modeling of small-tree growth can affect decision-making for a range of treatment plans. Accurately representing this critical component of stand development is important for evaluating treatment alternatives from fuel hazard reduction to harvest scheduling. In the Black Hills of South Dakota and Wyoming, USA, favorable growing conditions and prolific seed crops often coincide, resulting in abundant natural ponderosa pine (Pinus ponderosa var. scopulorum Dougl. Ex Laws.) seedling establishment. This study seeks to quantify the influence of planting density and site preparatio...

In California, climate change, dramatically manifested in the increasing severity and extent of wildfires, is renewing interest in tools to guide silvicultural treatments for reforestation. Managers often face difficult decisions regarding the potential use of herbicides, which are commonly an essential competing vegetation control method for assuring reforestation success in the region. Young stand fertilization may also help quickly achieve forest resilience and resistance to reburns.

FVS simulations that do not account for natural tree regeneration after silvicultural treatments that harvest trees, or natural disturbances that kill trees, may overestimate tree growth and underestimate tree mortality, stem density, and ladder fuel development over time. The Westside Fire- and Carbon-Oriented Forest Management Modeling (FCOMM) project aims to quantify fire resistance across forests of western Oregon, Washington, and northwestern California using FVS simulation of business-as-usual management practices (i.e., silvicultural treatments) across >10,000 FIA conditions. Given...

The Acadian Region of North America, which includes Maine and the Maritime Provinces of eastern Canada, is a complex transitional ecosystem that bridges the more hardwood-dominated temperate forests of the southern U.S. with the more softwood-dominated boreal forests of northern Canada. The region also has a long history of private ownership and mixed management, which has created a highly mixed landscape of forest conditions. Since 2008, the University of Maine has led the development of the Acadian Variant of the Forest Vegetation Simulator (FVS-ACD), which has seen continued development...

Although there has been some level of demand for FIA data in a format usable in FVS for at least two decades, it has accelerated in recent years due to the need for data collected consistently over large geographic areas. These applications are most commonly in support of carbon- and fire-related analyses, but at scales such as individual national forests or potential woodsheds the focus is commonly on timber yield analyses. In the past, a prerequisite to any large-scale analysis was reformatting of FIA or other datasets into an FVS-compatible format.