Anthropogenic influence on the interaction between the white-tailed eagle Haliaeetus albicilla and the common guillemot Uria aalge on the island of Stora Karlsö in the Baltic Sea

Melchiori, Silvia (2021) Anthropogenic influence on the interaction between the white-tailed eagle Haliaeetus albicilla and the common guillemot Uria aalge on the island of Stora Karlsö in the Baltic Sea. [Laurea magistrale], Università di Bologna, Corso di Studio in Biologia marina [LM-DM270] - Ravenna, Documento ad accesso riservato.
Documenti full-text disponibili:
[img] Documento PDF (Thesis)
Full-text accessibile solo agli utenti istituzionali dell'Ateneo
Disponibile con Licenza: Salvo eventuali più ampie autorizzazioni dell'autore, la tesi può essere liberamente consultata e può essere effettuato il salvataggio e la stampa di una copia per fini strettamente personali di studio, di ricerca e di insegnamento, con espresso divieto di qualunque utilizzo direttamente o indirettamente commerciale. Ogni altro diritto sul materiale è riservato

Download (1MB) | Contatta l'autore

Abstract

In 2020, the ‘anthropause’ due to the spread of the global pandemic COVID-19 interfered with the biotic interactions on the island of Stora Karlsö, in the Baltic Sea. The absence of tourists caused an increase of white-tailed eagle Haliaeetus albicilla which consequently disturbed the breeding common guillemot Uria aalge, that form the most important colony in the Baltic Sea. The effect of humans on these 2 species has been quantified again in 2021, to investigate whether the common guillemot - white-tailed eagle interaction had changed transitorily or permanently. The objective of this study has been reached with the collection of data regarding tourist presence, with the monitoring of the white-tailed eagle presence and disturbance on common guillemot, and with the calculation of the breeding performance of common guillemot. The partial return of tourists in 2021 brought some changes with respect to 2020: a decrease in the white-tailed eagle number, a decrease of white-tailed eagle disturbance on common guillemot, and an increase of the common guillemot breeding performance. In 2021, tourists influenced white-tailed eagle location around the island, and they caused a differentiated white-tailed eagle disturbance rate on common guillemot in different sub-colonies of the island. Based on these findings, touristic presence on Stora Karlsö has been confirmed to play a beneficial role for the common guillemot community. It also emerged the necessity to keep on monitoring the relationship between eagles, guillemots, and humans in order to pursue proper management and conservation strategies of the species within their ecosystem.

Abstract
Tipologia del documento
Tesi di laurea (Laurea magistrale)
Autore della tesi
Melchiori, Silvia
Relatore della tesi
Correlatore della tesi
Scuola
Corso di studio
Ordinamento Cds
DM270
Parole chiave
White-tailed eagle, Common guillemot, COVID-19, Tourists, Ecosystem
Data di discussione della Tesi
7 Dicembre 2021
URI

Altri metadati

Statistica sui download

Gestione del documento: Visualizza il documento

^