Factors affecting species number and density of dabbling duck guilds in North Europe

  title={Factors affecting species number and density of dabbling duck guilds in North Europe},
  author={Johan Elmberg and Petri Nummi and Hannu P{\"o}ys{\"a} and Kjell Sj{\"o}berg},
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 ... 
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