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Documents disponibles écrits par cet auteur (11)
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Article
Heidi Krüger, Auteur ; Kim Jaatinen, Auteur ; Sari Holopainen, Auteur ; Milla Niemi, Auteur ; Mia Vehkaoja, Auteur ; Juha Virtanen, Auteur ; Veli-Matti Vaananen, Auteur ; Petri Nummi, AuteurAgricultural intensification has significantly impacted habitat structures in agricultural landscapes and is one of the main drivers of biodiversity decline, especially in farmland birds. Birds are considered to reflect well the trends in other [...]
Article
Petri Nummi, Auteur ; Eeva-Maria Suontakanen, Auteur ; Sari Holopainen, Auteur ; Veli-Matti Vaananen, AuteurAvian species respond to ecological variability at a range of spatial scales and according to life history stage. Beaver dams create wetland systems for waterbirds that are utilized throughout different stages of the breeding season. We studied [...]
Article
Sari Holopainen, Auteur ; Céline Arzel, Auteur ; Johan Elmberg, Auteur ; Anthony D. Fox, Auteur ; Matthieu Guillemain, Auteur ; Gunnar Gunnarsson, Auteur ; Petri Nummi, Auteur ; Kjell Sjoberg, Auteur ; Veli-Matti Vaananen, Auteur ; Mikko Alhainen, Auteur ; Hannu Poysa, AuteurEurasian migratory duck species represent a natural resource shared between European countries. As is evident throughout human harvest history, lack of coordinated management and monitoring at appropriate levels often leads to ‘the tragedy of th[...]
Article
Hannu Poysa, Auteur ; Johan Elmberg, Auteur ; Gunnar Gunnarsson, Auteur ; Sari Holopainen, Auteur ; Petri Nummi, Auteur ; Kjell Sjoberg, AuteurThe Whooper Swan (Cygnus cygnus) is a good example of successful conservation, with rapidly growing numbers in Fennoscandia in recent decades. To the contrary, Eurasian Wigeon (Mareca penelope) shows a strong negative trend in breeding numbers, [...]
Article
Rauno A. Yrjölä, Auteur ; Sari Holopainen, Auteur ; Raimo Pakarinen, Auteur ; Sini Tuoriniemi, Auteur ; Matti Luostarinen, Auteur ; Markku Mikkola-Roos, Auteur ; Petri Nummi, Auteur ; Veli-Matti Vaananen, Auteur
Article
Petri Nummi, Auteur ; Veli-Matti Vaananen, Auteur ; Sari Holopainen, Auteur ; Hannu Poysa, AuteurDucks share the aquatic environment with invertebrate-eating fish. Thus, competitive interactions may take place. Fish have been introduced to many formerly fishless lakes, which has profoundly affected the competitive and predatory relations in[...]
Article
Johan Elmberg, Auteur ; Petri Nummi, Auteur ; Hannu Poysa, Auteur ; Kjell Sjoberg, Auteur ; Gunnar Gunnarsson, Auteur ; Preben Clausen, Auteur ; Matthieu Guillemain, Auteur ; David Rodrigues, Auteur ; Veli-Matti Vaananen, AuteurIt is an axiom in ecology that knowing the sheer number of individuals in a population is of very little help if the objective is to understand future and past changes in population size. Yet, this is exactly how migratory European ducks are mon[...]
Article
Heidi Kallioniemi, Auteur ; Veli-Matti Vaananen, Auteur ; Petri Nummi, Auteur ; Juha Virtanen, AuteurWe investigated the survival and breeding success of common pheasants Phasianus colchicus of two origins and in two predator densities. We translocated hand-reared and wild pheasant hens to southern Finland (60°N, 24°E) and hand-reared ones to c[...]
Article
Céline Arzel, Auteur ; Lisa Dessborn, Auteur ; Hannu Poysa, Auteur ; Johan Elmberg, Auteur ; Petri Nummi, Auteur ; Kjell Sjoberg, AuteurThe capacity of migratory species to adapt to climate change may depend on their migratory and reproductive strategies. For example, reproductive output is likely to be influenced by how well migration and nesting are timed to temporal patterns [...]
Article
Petri Nummi, Auteur ; Veli-Matti Vaananen, Auteur ; Raimo Pakarinen, Auteur ; Esa Pienmunne, AuteurHuman actions, such as increasing recreational activity at lakes, have resulted in a deterioration in the quality of diver breeding grounds. We studied the breeding success of Red-throated Divers during 1994-2011 in Nuuksio National park in Sout[...]
Article
Petri Nummi, Auteur ; Antti Paasivaara, Auteur ; Sari Suhonen, Auteur ; Hannu Poysa, AuteurHabitat use by birds may be related to single or interacting effects of habitat characteristics, food resources and predators, but little is known about factors affecting habitat use by wetland species in boreal ecosystems. We surveyed brood-rea[...]
