Anders Nielsen
Head of Department/Head of Research
Authors
Kjetil Hindar Lars Robert Hole Kyrre Kausrud Martin Malmstrøm Espen Rimstad Lucy Robertson Odd Terje Sandlund Eva Bonsak Thorstad Knut Vollset Hugo de Boer Katrine Eldegard Nina Johanna Järnegren Lawrence R. Kirkendall Inger Elisabeth Måren Anders Nielsen Erlend Birkeland Nilsen Eli Knispel Rueness Gaute VelleAbstract
No abstract has been registered
Abstract
Global economic value of agriculture production resulting from animal pollination services has been estimated to be $235–$577 billion. This estimate is based on quantification of crops that are available at the global markets, and mainly originates from countries with precise information about quantities of agriculture production, exports, and imports. In contrast, knowledge about the contribution of pollinators to household food and income in small-scale farming at local and regional scales is still lacking, especially for developing countries where the availability of agricultural statistics is limited. Although the global decline in pollinator diversity and abundance has received much attention, relatively little effort has been directed towards understanding the role of pollinators in small-scale farming systems, which feed a substantial part of the world’s population. Here, we have assessed how local farmers in northern Tanzania depend on insect-pollinated crops for household food and income, and to what extent farmers are aware of the importance of insect pollinators and how they can conserve them. Our results show that local farmers in northern Tanzania derived their food and income from a wide range of crop plants, and that 67% of these crops depend on animal pollination to a moderate to essential degree. We also found that watermelon—for which pollination by insects is essential for yield—on average contributed nearly 25% of household income, and that watermelons were grown by 63% of the farmers. Our findings indicate that local farmers can increase their yields from animal pollinated crops by adopting more pollinator-friendly farming practices. Yet, we found that local farmers’ awareness of pollinators, and the ecosystem service they provide, was extremely low, and intentional actions to conserve or manage them were generally lacking. We therefore urge agriculture authorities in Tanzania to act to ensure that local farmers become aware of insect pollinators and their important role in agriculture production.
Abstract
No abstract has been registered
Authors
Anders Nielsen Bjørn Arild Hatteland Martin Malmstrøm Ted von Proschwitz Gaute Velle Hugo de Boer Jan Ove Gjershaug Lawrence R. Kirkendall Eli Knispel Rueness Vigdis VandvikAbstract
No abstract has been registered
Authors
Anders Nielsen Merethe Aasmo Finne Maria Gulbrandsen Asmyhr Jan Ove Gjershaug Lawrence R. Kirkendall Vigdis Vandvik Gaute Velle Hugo de Boer Kjetil Hindar Nina Elisabeth Nagy Eli Knispel Rueness Odd Terje Sandlund Kjersti Sjøtun Hans K. StenøienAbstract
No abstract has been registered
Authors
Hugo de Boer Maria Gulbrandsen Asmyhr Hanne Hegre Grundt Kjersti Sjøtun Hans K. Stenøien Jan Ove Gjershaug Kjetil Hindar Lawrence R. Kirkendall Nina Elisabeth Nagy Anders Nielsen Eli Knispel Rueness Odd Terje Sandlund Gaute VelleAbstract
No abstract has been registered
Abstract
In Norway domestic sheep are mostly kept on mountain pastures over summer. Previous studies have shown that climate conditions affect the growth of mountain grazing lambs in contrasting ways. We analysed a data-set from the Tjøtta Research farm in northern Norway comprising weights and growth of 8696 lambs over 17 years. The lambs grazed coastal or a mountain pasture, 15 km apart. We found that the lambs grew faster when grazing the mountain pasture. Spring and integrated Normalized Difference Vegetation Index (NDVI) affected only the lambs grazing in the mountains. Winter conditions (North Atlantic Oscillation) and summer temperature had a positive effect on growth in both pastures while spring temperature and spring NDVI were important only in the mountains. The positive effect of spring NDVI suggests that the mountain pasture will produce bigger lambs under future climate warming, while the lambs on the coastal pasture will be less affected.
Authors
Anders Nielsen Nigel Yoccoz Geir Steinheim Geir Olve Storvik Yngve Rekdal Michael Angeloff Nathalie Pettorelli Øystein Holand Atle MysterudAbstract
No abstract has been registered
