Blar i Brage NMBU på forfatter "Walseng, Bjørn"
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Fossekallen i Lyngdalsvassdraget 1978-2011. Har kalking resultert i en bedre hekkesuksess?
Jerstad, Kurt; Walseng, Bjørn; Nilsson, Anna; Røstad, Ole Wiggo (NINA rapport, Research report, 2012)Fossekallbestanden har variert fra 20 til 117 hekkende par i perioden 1978-2011. Til sammen er det ved 158 hekkelokaliteter utført 4709 årssjekker. Middeltemperaturen under vinteren sammen med nedbøren, tidspunktet for ... -
Hydrology influences breeding time in the white‑throated dipper
Nilsson, Anna; Skaugen, Thomas; Reitan, Trond; LAbée-Lund, Jan Henning; Gamelon, Marlène; Jerstad, Kurt; Røstad, Ole Wiggo; Slagsvold, Tore; Stenseth, Nils Christian; Vøllestad, Leif Asbjørn; Walseng, Bjørn (Peer reviewed; Journal article, 2020)Background: Earlier breeding is one of the strongest responses to global change in birds and is a key factor determining reproductive success. In most studies of climate effects, the focus has been on large-scale environmental ... -
Interactions between demography and environmental effects are important determinants of population dynamics
Gamelon, Marlène; Grøtan, Vidar; Nilsson, Anna; Engen, Steinar; Hurrell, James W.; Jerstad, Kurt; Phillips, Adam S.; Røstad, Ole Wiggo; Slagsvold, Tore; Walseng, Bjørn; Stenseth, Nils Christian; Sæther, Bernt-Erik (Journal article; Peer reviewed, 2017)Climate change will affect the population dynamics of many species, yet the consequences for the long-term persistence of populations are poorly understood. A major reason for this is that density-dependent feedback effects ... -
Interactions between demography and environmental effects are important determinants of population dynamics
Gamelon, Marlène; Grøtan, Vidar; Nilsson, Anna L. K.; Engen, Steinar; Hurrell, James W.; Jerstad, Kurt; Phillips, Adam S.; Røstad, Ole Wiggo; Slagsvold, Tore; Walseng, Bjørn; Stenseth, Nils Christian; Sæther, Bernt-Erik (Journal article; Peer reviewed, 2017)Climate change will affect the population dynamics of many species, yet the consequences for the long-term persistence of populations are poorly understood. A major reason for this is that density-dependent feedback effects ... -
Location is everything, but climate gets a share: analyzing small-scale environmental influences on breeding success in the white-throated dipper
Nilsson, Anna L.K.; Reitan, Trond; Skaugen, Thomas; L'Abee-Lund, Jan Henning; Gamelon, Marlène; Jerstad, Kurt; Røstad, Ole Wiggo; Slagsvold, Tore; Stenseth, Nils Christian; Vøllestad, L. Asbjørn; Walseng, Bjørn (Peer reviewed; Journal article, 2020)Ecological and evolutionary effects of environmental variation on wild populations are of particular interest in a changing world. Large-scale environmental indices are classically used as environmental explanatory variables ... -
Long-term annual and spatial variation of polygyny in the white-throated dipper (Cinclus cinclus)
Walseng, Bjørn; Durant, Joël; Hessen, Dag Olav; Jerstad, Kurt; Nilsson, Anna; Røstad, Ole Wiggo; Slagsvold, Tore (Journal article; Peer reviewed, 2022)Mating strategies are key components in the fitness of organisms, and notably in birds the occurrence of monogamy versus polygyny has attracted wide interest. We address this by a very comprehensive dataset (2899 breeding ... -
Long-term annual and spatial variation of polygyny in the white-throated dipper (Cinclus cinclus)
Walseng, Bjørn; Durant, Joël; Hessen, Dag Olav; Jerstad, Kurt; Nilsson, Anna; Røstad, Ole Wiggo; Slagsvold, Tore (Peer reviewed; Journal article, 2022)Mating strategies are key components in the fitness of organisms, and notably in birds the occurrence of monogamy versus polygyny has attracted wide interest. We address this by a very comprehensive dataset (2899 breeding ... -
Long-term annual and spatial variation of polygyny in the white-throated dipper (Cinclus cinclus)
Walseng, Bjørn; Durant, Joël; Hessen, Dag Olav; Jerstad, Kurt; Nilsson, Anna; Røstad, Ole Wiggo; Slagsvold, Tore (Peer reviewed; Journal article, 2022)Mating strategies are key components in the fitness of organisms, and notably in birds the occurrence of monogamy versus polygyny has attracted wide interest. We address this by a very comprehensive dataset (2899 breeding ... -
Territory location and quality, together with climate, affect the timing of breeding in the whitethroated dipper
Nilsson, Anna; Slagsvold, Tore; Røstad, Ole Wiggo; Knudsen, E.; Jerstad, Kurt; Cadahia, Luis; Reitan, Trond; Helberg, Morten; Walseng, Bjørn; Stenseth, Nils Christian (Journal article; Peer reviewed, 2019)Recent climate change has led to advanced spring phenology in many temperate regions. The phenological response to variation in the local environment, such as the habitat characteristics of the territories birds occupy, ... -
The potential influence of Atlantic salmon Salmo salar and brown trout Salmo trutta on density and breeding of the white-throated dipper Cinclus cinclus
Nilsson, Anna; L'Abee-Lund, Jan Henning; Vøllestad, Leif Asbjørn; Jerstad, Kurt; Larsen, Bjørn Mejdell; Røstad, Ole Wiggo; Saltveit, Svein Jakob; Skaugen, Thomas; Stenseth, Nils Christian; Walseng, Bjørn (Journal article; Peer reviewed, 2018)Interactions between birds and fish are often overlooked in aquatic ecosystems. We studied the influence of Atlantic salmon and brown trout on the breeding population size and reproductive output of the white-throated ...