A5038194873- Plant and animal studies
- Ecology and Vegetation Dynamics Studies
- Plant Parasitism and Resistance
- Insect-Plant Interactions and Control
- Insect and Pesticide Research
- Insect and Arachnid Ecology and Behavior
- Conservation, Biodiversity, and Resource Management
- Cocoa and Sweet Potato Agronomy
- Land Use and Ecosystem Services
- Species Distribution and Climate Change
- Wildlife Ecology and Conservation
- Oil Palm Production and Sustainability
- Forest Insect Ecology and Management
- Animal Ecology and Behavior Studies
- Biological Control of Invasive Species
- Agricultural Innovations and Practices
- Forest Management and Policy
- Insect behavior and control techniques
- Weed Control and Herbicide Applications
- Forest Ecology and Biodiversity Studies
- African Botany and Ecology Studies
- Agronomic Practices and Intercropping Systems
- Plant and Fungal Species Descriptions
- Economic and Environmental Valuation
- Rangeland and Wildlife Management
University of Göttingen
2016-2025
Forest Research Institute Malaysia
2023
University of Bern
2023
Agroscope
2023
University of Guelph
2023
Agroécologie
2007-2021
University of Zurich
2007-2019
Universitätsmedizin Göttingen
2018
University of Vienna
2018
Tadulako University
2018
Abstract Understanding the negative and positive effects of agricultural land use for conservation biodiversity, its relation to ecosystem services, needs a landscape perspective. Agriculture can contribute high‐diversity systems, which may provide important services such as pollination biological control via complementarity sampling effects. Land‐use management is often focused on few species local processes, but in dynamic, landscapes, only diversity insurance guarantee resilience (the...
The diversity and abundance of wild insect pollinators have declined in many agricultural landscapes. Whether such declines reduce crop yields, or are mitigated by managed as honey bees, is unclear. We found universally positive associations fruit set with flower visitation insects 41 systems worldwide. In contrast, increased significantly bees only 14% the surveyed. Overall, pollinated crops more effectively; an increase enhanced twice much equivalent bee visitation. Visitation promoted...
Most ecological processes and interactions depend on scales much larger than a single habitat, therefore it is important to link spatial patterns at landscape scale. Here, we analyzed the effects of context distribution bees (Hymenoptera: Apoidea) multiple with respect following hypotheses: (1) Local abundance diversity increase increasing proportion surrounding seminatural habitats. (2) Solitary wild bees, bumble honey respond different scales. We selected 15 sectors determined percentage...
Agri-environment schemes are an increasingly important tool for the maintenance and restoration of farmland biodiversity in Europe but their ecological effects poorly known. Scheme design is partly based on non-ecological considerations poses restrictions evaluation studies. We describe a robust approach to evaluate agri-environment use it five European countries. compared species density vascular plants, birds, bees, grasshoppers crickets, spiders 202 paired fields, one with scheme, other...
Summary Habitat requirements of solitary bees include nesting sites, food resources and material. We used translocation experiments to establish foraging distances measured trip duration analyse how cope with the distance between sites suitable plants in different habitat types. Maximum site patch was 150–600 m for 16 bee species examined. Foraging correlated positively body length. Mean duration, seven species, ranged from 6 28 min also In a study polylectic Osmia rufa , we found...
Fragmentation of habitats in the agricultural landscape is a major threat to biological diversity, which greatly determined by insects. Isolation habitat fragments resulted decreased numbers species as well reduced effects natural enemies. Manually established islands red clover were colonized most available herbivore but few parasitoid species. Thus, herbivores released from parasitism, experiencing only 19 60 percent parasitism nonisolated populations. Species failing successfully colonize...
Abstract There is compelling evidence that more diverse ecosystems deliver greater benefits to people, and these ecosystem services have become a key argument for biodiversity conservation. However, it unclear how much needed in cost-effective way. Here we show that, while the contribution of wild bees crop production significant, service delivery restricted limited subset all known bee species. Across crops, years biogeographical regions, crop-visiting communities are dominated by small...
Biological pest control has primarily relied on local improvements in populations of natural enemies, but landscape structure may also be important. This is shown here with experiments at different spatial scales using the rape pollen beetle (Meligethes aeneus), an important oilseed (Brassica napus). The presence old field margin strips along fields was associated increased mortality beetles resulting from parasitism and adjacent, large, fallow habitats had even greater effect. In...
The worldwide decline of pollinators may negatively affect the fruit set wild and cultivated plants. Here, we show that self-fertilizing highland coffee (Coffea arabica) is highly variable related to bee pollination. In a comparison 24 agroforestry systems in Indonesia, could be predicted by number flower-visiting species, it ranged from ca. 60% (three species) 90% (20 species). Diversity, not abundance, explained variation set, so collective role species-rich community was important for...
Worldwide agriculture is one of the main drivers biodiversity decline. Effective conservation strategies depend on type relationship between and land-use intensity, but to date shape this unknown. We linked plant species richness with nitrogen (N) input as an indicator intensity 130 grasslands 141 arable fields in six European countries. Using Poisson regression, we found that was significantly negatively related N both field types after effects confounding environmental factors had been...
Human land use threatens global biodiversity and compromises multiple ecosystem functions critical to food production. Whether crop yield-related services can be maintained by a few dominant species or rely on high richness remains unclear. Using database from 89 studies (with 1475 locations), we partition the relative importance of richness, abundance, dominance for pollination; biological pest control; final yields in context ongoing land-use change. Pollinator enemy directly supported...
Abstract Land-use transitions can enhance the livelihoods of smallholder farmers but potential economic-ecological trade-offs remain poorly understood. Here, we present an interdisciplinary study environmental, social and economic consequences land-use in a tropical landscape on Sumatra, Indonesia. We find widespread biodiversity-profit resulting from forest agroforestry systems to rubber oil palm monocultures, for 26,894 aboveground belowground species whole-ecosystem multidiversity....
Niche complementarity is a commonly invoked mechanism underlying the positive relationship between biodiversity and ecosystem functioning, but little empirical evidence exists for among pollinator species. This study related differences in three functional traits of pollinating bees (flower height preference, daily time flower visitation within-flower behaviour) to seed set obligate cross-pollinated pumpkin Cucurbita moschata Duch. ex Poir. across land-use intensity gradient from tropical...
Abstract To counteract the decline of pollinators in Europe, conservation strategies traditionally focus on enhancing local availability semi‐natural habitats, as supported by European Union's Common Agriculture Policy. In contrast, we show that densities bumblebees, an important pollinator group agroecosystems, were not determined proportion habitats agricultural landscapes. Instead, bumblebee positively related to highly rewarding mass flowering crops (i.e. oilseed rape) landscape....
Abstract The cross‐edge spillover of subsidized predators from anthropogenic to natural habitats is an important process affecting wildlife, especially bird, populations in fragmented landscapes. However, the importance insect enemies agricultural unknown, despite abundance studies examining movement opposite direction. Here, we synthesize various ecological sub‐disciplines suggest that agriculturally may be prey habitat fragments. This contention based on (1) ubiquity agricultural–natural...