Wetland selection, niche breadth and overlap in 10 duck species wintering in northern Campania (Italy)

  • Stefano Giustino ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Marcello Bruschini ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Elio Esse ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Silvana Grimaldi ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Danila Mastronardi ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Silvia Capasso ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Alessio Usai ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.
  • Maurizio Fraissinet | mfraissinet@tiscali.it ASOIM Onlus - Associazione Studi Ornitologici Italia Meridionale, San Giorgio a Cremano (NA), Italy.

Abstract

Analysis of the selection index, the niche breadth and the niche overlap of 10 species of wintering ducks in 11 wetland areas of the Campania region between January 2003 and 2015 revealed that the distribution of the species in the examined sites was not casual. In fact, each species actively chose their wintering area. Using selection index, we were able to measure the species’ preferences and non-preferences for the 11 examined sites. By calculating Shannon-Wiener entropy and its normalized value (Evenness), we determined niche breadth; the Morisita index allowed us to check niche overlap.

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Published
2018-06-21
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Keywords:
Ecological index, wintering ducks, North Campania, wetlands selection, niche breadth and overlap
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How to Cite
Giustino, S., Bruschini, M., Esse, E., Grimaldi, S., Mastronardi, D., Capasso, S., Usai, A., & Fraissinet, M. (2018). Wetland selection, niche breadth and overlap in 10 duck species wintering in northern Campania (Italy). Rivista Italiana Di Ornitologia, 87(2), 3-8. https://doi.org/10.4081/rio.2017.260