Sovon, a Dutch bird protection organisation, counts birds. The number of greylag geese is increasing. Is this increas worrying fpr the diversity of water bird species?
What does the concept biodiversity mean, how can it be described mathematically and what are its advantages and limitations?
How does the biodiversity of water birds change in the Netherlands (Europe/your country) and what is the impact of the growth of the greylag goose population?