نتایج جستجو برای: ecosystem indicators

تعداد نتایج: 189260  

2016
Ricardo Beiras

The environmental monitoring strategy termed ecosystem-based approach (EBA) underlines the obvious benefits of managing natural resources on a holistic level, and it is particularly invoked for the rational and sustainable management of aquatic resources. However, when coming to implement EBA into monitoring schemes, such as those derived from the implementation of the European legislation conc...

Journal: :Ecology letters 2011
Sonia Kéfi Max Rietkerk Manojit Roy Alain Franc Peter C de Ruiter Mercedes Pascual

Robust critical systems are characterized by power laws which occur over a broad range of conditions. Their robust behaviour has been explained by local interactions. While such systems could be widespread in nature, their properties are not well understood. Here, we study three robust critical ecosystem models and a null model that lacks spatial interactions. In all these models, individuals a...

2005
XIAOJUN YANG

This article provides an overview on the status of remote sensing and Geographical Information System (GIS) applications in developing landscapelevel environmental indicators for estuarine ecosystem assessment. These broadscape indicators are related to near-shore water quality, submergent aquatic vegetation, coastal wetlands, as well as watershed landscape structure and pattern. Slightly diffe...

2010
J. HUNTER

This paper describes the ontology-based information management system “Health-eWaterways” that has been developed to link over 500 management actions to the environmental monitoring data being acquired through the SEQ HWP’s Ecosystem Health Monitoring Program. We describe the ontology that has been developed to link area-based Action Plans to specific regions, indicators and parameters. We also...

2007
Tischa A. Muñoz-Erickson Bernardo Aguilar-González Thomas D. Sisk

Collaborative management has gained popularity across the United States as a means of addressing the sustainability of mixed-ownership landscapes and resolving persistent conflicts in public lands management. At the same time, it has generated skepticism because its ecological and social outcomes are seldom measured. Evaluating the success of collaborative efforts is difficult because framework...

Journal: :Canadian journal of public health = Revue canadienne de sante publique 1999
A Casebeer K Deis S Doze

The ability to measure population health trends and improvements can be enhanced through collaborative efforts to describe existing knowledge and via shared development opportunities. This paper highlights a project undertaken in Alberta which has created an inventory of health status indicators in use in the province, and provides a framework for strategic progress in the development and use o...

2012
William A. Brock Stephen R. Carpenter

Abrupt changes in dynamics of an ecosystem can sometimes be detected using monitoring data. Using nonparametric methods that assume minimal knowledge of the underlying structure, we compute separate estimates of the drift (deterministic) and diffusion (stochastic) components of a general dynamical process, as well as an indicator of the conditional variance. Theory and simulations show that non...

Journal: :Marine pollution bulletin 2013
Tony J Pitcher William W L Cheung

Recent work suggesting that fisheries depletions have turned the corner is misplaced because analysis was based largely on fisheries from better-managed developed-world fisheries. Some indicators of status show improvements in the minority of fisheries subjected to formal assessment. Other indicators, such as trophic level and catch time series, have been controversial. Nevertheless, several de...

2005
Marco Marchetti Risto Päivinen Brita Pajari

At the 9 meeting of the SBSTTA of the CBD a recommendation was made to begin testing of five biodiversity indicators in order to measure progress towards the 2010 target. This paper considers one of these indicators for Pan-Europe. The basic principle of the index is to calculate the average trend in abundance of a set of ecosystem-representative species. The index is considered to be generic, ...

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