Passar para o conteúdo principal

page search

Displaying 3841 - 3852 of 5230

Bark Beetles Increase Biodiversity While Maintaining Drinking Water Quality

Journal Articles & Books
Dezembro, 2015
Alemanha

Increasing natural disturbances in conifer forests worldwide complicate political decisions about appropriate land management. In particular, allowing insects to kill trees without intervention has intensified public debate over the dual roles of strictly protected areas to sustain ecosystem services and to conserve biodiversity. Here we show that after large scale bark beetle Ips typographus infestation in spruce Picea abies forests in southeastern Germany, maximum nitrate concentrations in runoff used for drinking water increased significantly but only temporarily at the headwater scale.

Critical success factors of a whole of business extension approach for increased capacity of beef producers and improved enterprise profit and sustainability

Journal Articles & Books
Dezembro, 2009

The 'Research to Reality Project' assisted beef producers in the Burdekin catchment of north Queensland to develop practical responses to a range of production and grazing land management challenges. The project involved three groups of beef producers encompassing 19 enterprises, 680000ha of land and the management of 162000 cattle. The project was founded on a continuous improvement and innovation approach, and included an employed industry champion and multi-disciplinary project team who used a range of extension methods to identify, develop and implement on-property projects.

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

Journal Articles & Books
Dezembro, 2012
Etiópia

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.

Effects of grazing exclusion on the spatial variability of subalpine plant communities: A multiscale approach

Journal Articles & Books
Dezembro, 2011

The fine-scale spatial structure of plant communities is a key component for understanding the dynamics in vegetation following changes in land management but needs to be assessed at an appropriate scale. We studied the response of plant diversity and spatial variability of species and trait composition to grazing vs. non-grazing (>20 years) using different grain sizes of sampling in three subalpine plant communities.

Simulating the value of collaboration in multi-actor conservation planning

Journal Articles & Books
Dezembro, 2013

The loss of habitat and biodiversity worldwide has led to considerable resources being spent on conservation interventions. Prioritising these actions is challenging due to the complexity of the problem and because there can be multiple actors undertaking conservation actions, often with divergent or partially overlapping objectives. We explore this issue with a simulation study involving two agents sequentially purchasing land for the conservation of multiple species using three scenarios comprising either divergent or partially overlapping objectives between the agents.

Identifying realistic recovery targets and conservation actions for tigers in a human‐dominated landscape using spatially explicit densities of wild prey and their determinants

Journal Articles & Books
Dezembro, 2014
Índia

AIM: Setting realistic population targets and identifying actions for site and landscape‐level recovery plans are critical for achieving the global target of doubling wild tiger numbers by 2022. Here, we estimate the spatially explicit densities of wild ungulate prey across a gradient of disturbances in two disjunct tiger habitat blocks (THBs) covering 5212� km², to evaluate landscape‐wide conditions for tigers and identify opportunities and specific actions for recovery. LOCATION: Western Terai Arc Landscape, India.

Hydrological Processes and Model Representation: Impact of Soft Data on Calibration

Journal Articles & Books
Dezembro, 2015

Hydrologic and water quality models are increasingly used to determine the environmental impacts of climate variability and land management. Due to differing model objectives and differences in monitored data, there are currently no universally accepted procedures for calibration and validation in the literature. In an effort to develop accepted model calibration and validation procedures or guidelines, a special collection of 22 research articles that present and discuss calibration strategies for 25 hydrologic and water quality models was previously assembled.

Land Management Decisions and Agricultural Productivity in the Hillsides of Honduras

Conference Papers & Reports
Dezembro, 2006
Honduras

Increasing land degradation and concomitant low agricultural productivity are important determinants of rural poverty in the hillside areas of Honduras. Using data at the levels of the farm household, parcel and plot, we develop an econometric modeling framework to analyze land management decisions and their impact on crop productivity. Our econometric model allows for endogenous household decisions regarding livelihood strategy choice, use of labor and external inputs, and participation in organizations.