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Habitat dynamics of beaver Castor canadensis at two spatial scales
Abstract We studied habitat dynamics of the Canadian beaver Castor canadensis in a boreal forest landscape in southern Finland at two scales: the beaver pond level and the landscape level. To explore…
Invasive North American beaver Castor canadensis in Eurasia: a review of potential consequences and a strategy for eradication
There is a distinct risk that Cc may eventually competitively exclude Cf at all landscape scales, and as no country in Eurasia obviously wants an invasion of Cc, it is advocated that the precautionary principle be adhered to and an attempt to eradicate Cc from Eurasia be seriously considered.
Relationships between species number, lake size and resource diversity in assemblages of breeding waterfowl
Breeding waterfowl, habitat diversity and food diversity were studied in 31 boreal lakes in Finland and Sweden as well as in three other boreal areas of Sweden and Norway.
Forest disturbance by an ecosystem engineer: beaver in boreal forest landscapes
Natural disturbances are important for forest ecosystem dynamics and maintenance of biodiversity. In the boreal forest, large-scale disturbances such as wildfires and windstorms have been emphasized,…
The beaver as an ecosystem engineer facilitates teal breeding
In boreal areas beaver facilitate teal breeding by enhancing both resource abundance and habitat structure, and this study studied the effect of beaver flooding on breeding success of a dabbling duck, the teal.
Why are there so many empty lakes? Food limits survival of mallard ducklings
Food is an important factor affecting survival in many bird species, but this relationship has rarely been explored experimentally with respect to reproductive output of precocial birds. In a field…
Habitat selection rules in breeding mallards (Anas platyrhynchos): a test of two competing hypotheses
The results suggest that the local breeding population studied is not limited by spacing behaviour related to habitat selection, and the ideal preemptive rule was rejected whereas the conspecific attraction rule was to some extent supported.
Food-niche relationships of sympatric mallards and green-winged teals
- P. Nummi
Diets of juvenile green-winged teals and mallards in August and September were studied with respect to the proportion of animal and plant matter and prey size.
Factors affecting species number and density of dabbling duck guilds in North Europe
We addressed how species number and pair density in guilds of co-existing species is related to habitat structure, and to the abundance and diversity of food resources. using the assemblage of seve…
Habitat associations of ducks during different phases of the breeding season
Habitat luxuriance seemed to be more important for dabbling ducks and nektonic invertebrates moreImportant for the goldeneye and emerging insects were most important to the teal.