نتایج جستجو برای: agro ecosystems

تعداد نتایج: 55957  

Journal: :Sustainability 2022

The agro-biodiversity present in agro-ecosystems is fundamental guaranteeing sustainability and resilience. However, there are very few approaches for evaluating it and, even less, ones that include indicators to analyze the influence of structural spatial configuration a landscape order favor connectivity productive systems. There also no proposals management conservation practices, producer (...

2015
M. Fader W. von Bloh S. Shi A. Bondeau W. Cramer

In the Mediterranean region, climate and land use change are expected to impact on natural and agricultural ecosystems by warming, reduced rainfall, direct degradation of ecosystems and biodiversity loss. Human population growth and socioeconomic changes, notably on the eastern and southern shores, will require increases in food production and put additional pressure on agro-ecosystems and wate...

2011
Peter H Thrall John G Oakeshott Gary Fitt Simon Southerton Jeremy J Burdon Andy Sheppard Robyn J Russell Myron Zalucki Mikko Heino R Ford Denison

Anthropogenic impacts increasingly drive ecological and evolutionary processes at many spatio-temporal scales, demanding greater capacity to predict and manage their consequences. This is particularly true for agro-ecosystems, which not only comprise a significant proportion of land use, but which also involve conflicting imperatives to expand or intensify production while simultaneously reduci...

2008
Jeremy J Burdon Peter H Thrall

Infectious disease is a major causal factor in the demography of human, plant and animal populations. While it is generally accepted in medical, veterinary and agricultural contexts that variation in host resistance and pathogen virulence and aggressiveness is of central importance to understanding patterns of infection, there has been remarkably little effort to directly investigate causal lin...

2009
Timothy Lynam

Zambezi Valley agro-ecosystems are environmentally, economically, and institutionally variable. This variability means that it is not possible to measure everything necessary to develop a predictive understanding of them. In particular, because people and their environments are constantly changing, what was measured yesterday may change by tomorrow. Here, I describe elements of the approach tha...

2015
Ingrid M. Lubbers Kees Jan van Groenigen Lijbert Brussaard Jan Willem van Groenigen

Concerns about rising greenhouse gas (GHG) concentrations have spurred the promotion of no-tillage practices as a means to stimulate carbon storage and reduce CO2 emissions in agro-ecosystems. Recent research has ignited debate about the effect of earthworms on the GHG balance of soil. It is unclear how earthworms interact with soil management practices, making long-term predictions on their ef...

2000
Jeff Holland Lenore Fahrig

The relationship between density and richness of herbivorous insects in alfalfa fields, and the amount (total length) of woody field border in the landscapes surrounding the fields was studied. Insects (predominantly herbivorous) were sampled in 35 alfalfa fields in 1995 and 24 fields in 1996, and the total length of woody field borders within the 1 km radius circular landscape surrounding each...

Journal: :The Onderstepoort journal of veterinary research 2015
Carmen T Jacobs Clarke H Scholtz

Avermectins and milbemycins are commonly used in agro-ecosystems for the control of parasites in domestic livestock. As integral members of agro-ecosystems with importance in maintaining pasture health through dung burial behaviour, dung beetles are an excellent nontarget bio-indicator taxon for examining potential detrimental effects of pesticide application. The current review focuses on the ...

2014
Jie ZHAO Deborah A. NEHER

Soil energy pathways of different ecosystems using nematode trophic group analysis: a meta analysis Jie ZHAO 1,2,3,∗ and Deborah A. NEHER 2 1 Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, P.R. China 2 Department of Plant & Soil Science, University of Vermont, 63 Carrigan Drive, Burlin...

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