Blättern Fakultät für Agrarwissenschaften (inkl. GAUSS) nach "Tscharntke, Teja Prof. Dr." Betreuer
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Local and landscape threats to bee and wasp populations in agricultural landscapes
(2023-12-01)The transformation and intensified use of the agricultural landscape in central Germany in the past decades has led to the fragmentation and loss of semi-natural habitats, threatening biodiversity including insects. Bees ... -
Diversified Farming Systems – An evaluation of ecological benefits, economic costs & risks farmers face
(2023-03-17)Biodiversity and associated ecosystem services in cultural landscapes are declining due to increasing agricultural production. Human population growth and changing consumption patterns cause higher demands on agricultural ... -
Biodiversity and ecosystem services in a tropical smallholder landscape in Madagascar
(2023-01-20)The overarching theme of this thesis is how biodiversity and ecosystem services respond to land-use change by smallholder farming in north-eastern Madagascar. The region is a global biodiversity hotspot and a major vanilla ... -
Pollinators and Ecosystem Services in an Oil Palm Transformation Landscape
(2022-09-27)Insect pollination is an economically important ecosystem service that depends heavily on wild pollinators. Landscape transformation caused by conversion to agriculture threatens habitats of wild pollinators, reducing their ... -
Farmland biodiversity and associated ecosystem services across tropical rural- urban landscapes
(2022-07-20)Driven by the unprecedented growth of human populations, cities all over the globe are expanding. Especially Asia and Africa are hotspots of current and future urbanization. As cities grow, they extend in area, sprawling ... -
Performance of organic and conventional crop varieties and species mixtures under stress
(2022-02-24)The conservation of agrobiodiversity is considered a priority to ensure the sustainability and sovereignty of food production under changing climatic and socio-economic conditions. In this context, substantial value is ... -
Plant-pollinator networks in fragmented calcareous grasslands
(2021-04-23)Understanding the dynamics of species interactions under the threats of habitat loss and fragmentation can be key to develop measures preventing further degradation of natural and agricultural systems. Agroecological ... -
Cocoa pollination as a potential yield driver under changing management and climate
(2020-08-24)In my doctoral research, I combined a literature review with field experiments to investigate the pollination ecology of cocoa, the third largest export commodity worldwide. The aim of my work was to elucidate the potential ... -
Effects of local and landscape scale factors on ant diversity and biocontrol of the coffee berry borer in Colombia
(2018-08-07)The coffee berry borer –CBB- (Hypothenemus hampei) is the economically most important pest of coffee worldwide. Within the Integrated Pest Management –IPM- strategy for this borer, the biological control component has ... -
Biodiversity and ecosystem processes in an experimental island system
(2018-02-16)The field of island research is one of the best researched topics in ecological and evolutionary research. As islands are spatially restricted and basic principles of island colonization are investigated, they display one ... -
Scaling of Animal Communities: From Local and Landscape to Global Processes
(2017-12-12)Animal communities are influenced by processes changing from the local to global scale. Local processes include resource and habitat availability, while landscape processes are often driven by habitat availability and ... -
Landscape heterogeneity affects arthropod functional diversity and biological pest control
(2017-12-07)Land-use change is a major cause of biodiversity loss. In agricultural landscapes, which cover 40% of European land, changes in land-use are spatially and temporally very dynamic, thereby changing the organisms’ habitat ... -
Intensification of paddy cultivation in relation to changing agrobiodiversity patterns and social-ecological processes in South India
(2016-07-01)Around the globe, natural and agrarian landscapes are subject to agricultural intensification to meet the increasing and changing demands for resources of the growing population. This intensification takes place at two ... -
Local and Landscape Management of Biological Pest Control in Oil Palm Plantations
(2016-06-14)Oil palm is the highest yielding vegetable oil crop per unit area and plantations expand at a rapid pace. Large-scale expansion of oil palm plantations, transformed from natural habitat, results in huge biodiversity losses. ... -
Bird Diversity, Functions and Services across Indonesian Land-use Systems
(2016-05-20)In tropical regions, rampant land-use conversion for agriculture threatens biodiversity hotspots. Forests are vanishing, and taxonomic diversity is severely affected by the transformation on a large scale. For mitigating ... -
Changing valuations of cultural ecosystem services along an urban-periurban gradient in Berlin
(2015-11-06)Urban green experiences high use-pressures through differing and conflicting demands. Eco-system services provided by urban green are manifold, with cultural ecosystem services (CES) representing socio-cultural benefits. ... -
Landscape context of habitat fragmentation and the diversity of plants, arthropods and snails on calcareous grasslands
(2015-04-10)Land-use change, habitat loss and fragmentation are among the main drivers of the decline of biodiversity worldwide. In Central Europe, calcareous grasslands belong to the most species-rich habitats. They harbour a great ... -
Local management and landscape context effects on bee pollination, ant seed predation, and yield in Indonesian homegardens
(2015-03-03)Tropical countries contribute substantially to global agricultural production, but the majority of farmers are small-scale subsistence farmers. Their comparably low agricultural productivity is coupled with major yield ... -
Scale dependence of pollinator community turnover and tritrophic interactions in changing landscapes
(2015-01-23)Agricultural landscapes account for approximately 40% of global terrestrial area and this proportion tends to grow due to the increasing demand for fuel, food and other agricultural products. For successful crop production ... -
Birds, bats and arthropods in tropical agroforestry landscapes: Functional diversity, multitrophic interactions and crop yield
(2014-04-03)Ecosystem services such as the suppression of pest insects may increase productivity of agroforestry systems and thereby increase well-being of smallholders. Tropical birds and bats are effective predators of arthropods ...