Treesearch

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.

Antibiotics are used for the well-being of human beings and other animals. Detectable levels of antibiotics can be found in pharmaceutical, municipal, and animal effluents. Therefore, the treatment of antibiotic contaminated water is of great concern. In this study, we fabricated a sustainable aminated/TEMPO cellulose nanofiber (Am/TEMPO-CNF) aerogel to remove oxytetracycline (OTC) and chloramphenicol (CAP) from synthetic wastewater. The prepared aerogel was characterized using different analytical techniques such as elemental analysis, FTIR, TGA, SEM-EDS, and N2 adsorption–desorption...

The rate at which new information about stream resources is being created has accelerated with the recent development of spatial stream-network models (SSNMs), the growing availability of stream databases, and ongoing advances in geospatial science and computational efficiency. To further enhance information development, the National Stream Internet (NSI) project was developed as a means of providing a consistent, flexible analytical infrastructure that can be applied with many types of stream data anywhere in the country. A key part of that infrastructure is the NSI network, a digital GIS...

The height of woody plants is a defining characteristic of forest and shrubland ecosystems because height responds to climate, soil and disturbance history. Orbiting LiDAR instruments, Ice, Cloud and land Elevation Satellite-2 (ICESat-2) and Global Ecosystem Dynamics Investigation LiDAR (GEDI), can provide near-global datasets of plant height at plot-level resolution. We evaluate canopy height measurements from ICESat-2 and GEDI with high resolution airborne LiDAR in six study sites in different biomes from dryland shrub to tall forests, with mean canopy height across sites of 0.5-40 m....