Treesearch

Interest in prescribed fire science has grown over the past few decades due to the increasing application of prescribed fire by managers to mitigate wildfire hazards, restore biodiversity, and improve ecosystem resilience. Numerous ecological disciplines use prescribed fire experiments to provide land managers with evidence-based information to support prescribed fire management. Documenting variation in the context and conditions during prescribed fire experimental treatments is critical for management inference, but inconsistencies in reporting critical experimental details can complicate...

Forests are often managed for a wide range of purposes, such as wood production, recreation and biodiversity conservation. Healthy, well-managed forests also store and filter water as well as reduce surface runoff and flood risk. Regrowing forests, on the other hand, can reduce downstream water supplies. Forests that are unmanaged may become overstocked (i.e. have a very high density of trees per unit area). This, in turn, can increase susceptibility to insect outbreaks and the risk of wildfire from the accumulation of fuels (Shang et al., 2004), both of which can have significant impacts...

Soil rehabilitation is reestablishing disturbed soil back to healthy conditions to raise site productivity as quickly as possible. Soil rehabilitation is a field of interest for the U.S. Department of Agriculture, Forest Service and an important resource management strategy that promotes and enhances ecosystem restoration. Site productivity directly relates to soil physical, chemical, and biome health; vegetation growth rates; and the biodiversity within plant and animal community assemblages. The National Forest Management Act regulates actions that substantially or permanently impair...

Climate change and disturbance can alter invasion success of clonal plants by differentially affecting the clonal traits influencing their establishment as young plants. Clonal traits related to the vegetative reproduction of native Pascopyrum smithii and non-native Bromus inermis grass seedlings were evaluated under altered precipitation frequencies and a single grazing event. Pascopyrum smithii maintained similar vegetative reproduction under three simulated precipitation frequencies whereas B. inermis vegetative reproduction declined as precipitation became more intermittent. Vegetative...

Converting biomass to biochar (Figure ES-1) presents exciting opportunities to mitigate climate change, improve forest and soil health, decrease wildfire risk, bolster ecosystem services, and revitalize rural economies. Our expert panel examined how biomass is harvested, converted to biochar and applied and where operational changes and funding could significantly magnify biochar’s contributions. To advance knowledge and efficacies, we found that a rigorous combination of long-term multi-site coordinated research, near-term market-focused research and development and enhancement of...

Climate change is a global persistent threat to fish and fish habitats throughout North America. Climate-induced modification of environmental regimes, including changes in streamflow, water temperature, salinity, storm surges, and habitat connectivity can change fish physiology, disrupt spawning cues, cause fish extinctions and invasions, and alter fish community structure. Reducing greenhouse emissions remains the primary mechanism to slow the pace of climate change, but local and regional management agencies and stakeholders have developed an arsenal of adaptation strategies to help...

Although the presence of root anatomical structures of young Pinus ponderosa seedlings grown in containers of contrasting volume (164 vs. 7000 cm3) was similar, seedlings reared 60 days in the large container had more vascular cambium although the xylem thickness was similar. In addition, seedlings in large containers had nearly twice as many resin ducts within the vascular cambium as their cohorts in small containers. Taproot length closely matched container depth. Though lateral root emission rates were similar between container sizes, large container seedlings had more than 2X the...

Forests are an essential component of the natural environment, as they support biodiversity, sequester carbon, and play a crucial role in biogeochemical cycles - in addition to producing organic matter that is necessary for the function of terrestrial organisms. Forests today are subject to threats ranging from natural occurrences, such as lightning-ignited fires, storms, and some forms of pollution, to those caused by human beings, such as land-use conversion (deforestation or intensive agriculture). In recent years, threats from pests and pathogens, particularly non-native species, have...

It is now well established that humans are the most powerful influence on the environment. The scale, pace and intensity of human activity is fundamentally altering earth’s climate system (IPCC, 2014) and driving global biodiversity and ecosystem decline (IPBES, 2019). Simultaneously, new forms and patterns of mobility are emerging and accelerating in a world driven by globalised market forces, new technologies, media transformations and related cultural trends of late modernity (Stokols, 2018; Boccagni, 2017; Cresswell, 1996). Indeed, during the final stages of preparing this volume we...

We opened this volume with sobering stories of the dire global challenges before us. Indeed, one would not be hard pressed to find stories of the urgency of our various environmental and social crises. While we wrote this book, the COVID-19 pandemic raged, towns in the Arctic reached unprecedented temperatures, countless hectares of forests fell while fossil fuels continued to be violently extracted from the earth, and Black, Indigenous and people of colour continued to be exploited and oppressed. Yet, despite all this, or rather because of it, we wish to begin our conclusion with hope and...