Sökning: "voltinism"

Visar resultat 6 - 8 av 8 avhandlingar innehållade ordet voltinism.

1. 6. Latitudinal patterns in butterfly life history and host plant choice

   Författare :Georg Nygren; Sören Nylin; Mark Scriber; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biology; Biologi;

   Sammanfattning : The central subject in this thesis is adaptation of insect populations to different environments along latitudinal gradients. When latitude decreases, the longer favorable season causes an increase in time available for development. However, predictions are complicated by shifts in voltinism. LÄS MER

3. 7. Effect of climate and land use on niche utilization and distribution of nettle-feeding  butterflies

   Författare :Hélène Audusseau; Niklas Janz; Sören Nylin; Matthew Forister; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; zoologisk ekologi; Animal Ecology;

   Sammanfattning : Anthropogenic changes in climate and land use are causing a dramatic erosion of biodiversity. To understand this erosion, and predict future transformations of biodiversity, we need to understand better species’ response to these changes at different spatial and temporal scales. LÄS MER

4. 8. Potential impact of climate change on European agriculture: a case study of potato and Colorado potato beetle

   Författare :Bakhtiyor Pulatov; Institutionen för naturgeografi och ekosystemvetenskap; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Colorado potato beetle; climate change; day length; degree day model; frost damage; distribution; temperature; potato; regional climate model; synchrony;

   Sammanfattning : European agriculture is facing the challenge of managing the impact of climate change on food security. Agriculture in a northern temperate climate is likely to benefit from higher temperature and longer growing season while, in the south, crop productivity is likely to decline. LÄS MER