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Displaying 3829 - 3840 of 5233

Determining soil carbon stock changes: Simple bulk density corrections fail [Erratum: 2010 Aug. 15, v. 138, no. 3-4, p. 355]

Journal Articles & Books
Diciembre, 2009

Several methods are used to correct total soil carbon data in response to land use or management changes inherently coupled with concomitant alteration to bulk density (BD). However, a rigorous evaluation of correction methods has not been conducted. We compared original, maximum, and minimum equivalent soil mass (ESM) corrections to the fixed depth (FD) method and direct C concentrations.

Ecosystems and Vulnerable Populations Perspective on Solastalgia and Psychological Distress After a Wildfire

Journal Articles & Books
Diciembre, 2015
Estados Unidos de América

We studied the relationship between psychological distress and relative resource and risk predictors, including loss of solace from the landscape (solastalgia), one year after the Wallow Fire, in Arizona, United States. Solastalgia refers to the distress caused by damage to the surrounding natural environment and it has not been examined for its relationship to psychological health. Doing so opens avenues of research that inquire into how land management might be able to support improved community resilience and psychological health outcomes after a wildfire.

Desertification and livestock grazing: The roles of sedentarization, mobility and rest

Journal Articles & Books
Diciembre, 2011

Pastoralism is an ancient form of self-provisioning that is still in wide use today throughout the world. While many pastoral regions are the focus of current desertification studies, the long history of sustainability evidenced by these cultures is of great interest. Numerous studies suggesting a general trend of desertification intimate degradation is a recent phenomenon principally attributable to changes in land tenure, management, and treatment.

Demography beyond the population

Journal Articles & Books
Diciembre, 2016

Population ecology, the discipline that studies the dynamics of species’ populations and how they interact with the environment, has been one of the most prolific fields of ecology and evolution. Demographic research is central to quantifying population‐level processes and their underlying mechanisms and has provided critical contributions to a diversity of research fields. Examples include the spread of infectious diseases, eco‐evolutionary dynamics and rapid evolution, mechanisms underlying invasions and extinctions, and forest productivity.

Assessing the impacts of watershed indexes and precipitation on spatial in-stream E. coli concentrations

Journal Articles & Books
Diciembre, 2012
Estados Unidos de América

Pathogen contamination of waterbodies, which is often identified by the presence of pathogen indicators such as Escherichia coli, is a major water quality concern in the United States. Reducing in-stream pathogen contamination requires an understanding of the combined impacts of land cover, climatic conditions, and anthropogenic activities at the watershed scale. In this study these factors are considered by assessing linear relationships between in-stream E. coli water quality data, watershed indexes, and rainfall for the Squaw Creek Watershed, IA, USA.

Response of Two Sagebrush Sites to Low-Disturbance, Mechanical Removal of Piñyon and Juniper

Journal Articles & Books
Diciembre, 2010
Estados Unidos de América

In the Great Basin of the western United States, expansion of Pinus monophylla (singleleaf piñyon) and Juniperus osteosperma (Utah juniper) out of historic woodlands and into Artemisia spp. (sagebrush) shrubland communities can facilitate the invasion of exotic downy brome (Bromus tectorum) and lead to decreases in ecological and economic values of shrublands. This expansion has, therefore, been the focus of management efforts, including the thinning or removal of trees in areas that were historically shrubland.

Participatory Criteria Selection: Finding Conflictive Positions in Environmental Postassessment of Land Management and Restoration Actions

Journal Articles & Books
Diciembre, 2016

Stakeholder participation in environmental assessment of past land management and restoration actions in drylands is important to improve knowledge and management of these ecosystems. Participatory identification and prioritization of monitoring and assessment criteria, while increasingly incorporated into assessment, is still perceived as challenging due to conflicting values and perspectives among stakeholders.

role of social learning for soil conservation: the case of Amba Zuria land management, Ethiopia

Journal Articles & Books
Diciembre, 2012
Etiopía

Social learning plays key roles in sustainable natural resource management; however, studies on its role show mixed results. Even though most current studies highlight positive outcomes, there are also negative effects of social learning with respect to natural resource management. This paper explores the influence of social learning outcomes on the adoption of soil conservation practices in Amba Zuria, Ethiopia. Data were collected through semi-structured interviews, group discussions and in workshops.