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Effect of touristic activities on seabirds’ habitat selection on sandy beaches Cover

Effect of touristic activities on seabirds’ habitat selection on sandy beaches

Oceanological and Hydrobiological Studies
Volume 52 (2023): Issue 3 (September 2023)
By: Leonardo Costa,  Danilo Freitas Rangel and  Ilana Zalmon  
Open Access
|Oct 2023

Figures & Tables

Figure 1

Map of the study area showing the high impact (HI), moderate impact (MI), and low impact (LI) sectors in Praia Grande, southeastern Brazil. The Ilha dos Franceses island (red square) is a nesting area for the brown booby Sula leucogaster.
Map of the study area showing the high impact (HI), moderate impact (MI), and low impact (LI) sectors in Praia Grande, southeastern Brazil. The Ilha dos Franceses island (red square) is a nesting area for the brown booby Sula leucogaster.

Figure 2

Principal Component Analysis (PCA) showing the abiotic and biotic characterization of the high, moderate, and low impact sectors in Praia Grande, southeastern Brazil. Wv = wave height; T = water temperature; Hm = number of people; Sw = swash width; St = swash time; Fs = abundance of fish in the surf zone; Dg = number of domestic dogs; Ws = wind speed.
Principal Component Analysis (PCA) showing the abiotic and biotic characterization of the high, moderate, and low impact sectors in Praia Grande, southeastern Brazil. Wv = wave height; T = water temperature; Hm = number of people; Sw = swash width; St = swash time; Fs = abundance of fish in the surf zone; Dg = number of domestic dogs; Ws = wind speed.

Figure 3

Number of species (A) and abundance of fish (B) in the surf zone of the high impact (HI), moderate impact (MI), and low impact (LI) sectors in Praia Grande, southeastern Brazil. The dispersed points represent trawls carried out twice during the high tourist season and twice again during the low season; the larger point within the box represents the mean values; the line within the box represents the median; the box represents the interquartile intervals.
Number of species (A) and abundance of fish (B) in the surf zone of the high impact (HI), moderate impact (MI), and low impact (LI) sectors in Praia Grande, southeastern Brazil. The dispersed points represent trawls carried out twice during the high tourist season and twice again during the low season; the larger point within the box represents the mean values; the line within the box represents the median; the box represents the interquartile intervals.

Figure 4

Number of foraging birds in the high impact (HI), moderate impact (MI), and low impact (LI) sectors in Praia Grande, southeastern Brazil. A: Sula leucogaster; B: Larus dominicanus; C: Fregata magnificens; D: Sterna hirundinacea; E: Nannopterum brasilianus. The dispersed points represent approximated values of the counting of birds with foraging behaviours; the larger point within the box represents the mean values per sampling day; the line within the box represents the median; the box represents the interquartile intervals.
Number of foraging birds in the high impact (HI), moderate impact (MI), and low impact (LI) sectors in Praia Grande, southeastern Brazil. A: Sula leucogaster; B: Larus dominicanus; C: Fregata magnificens; D: Sterna hirundinacea; E: Nannopterum brasilianus. The dispersed points represent approximated values of the counting of birds with foraging behaviours; the larger point within the box represents the mean values per sampling day; the line within the box represents the median; the box represents the interquartile intervals.

Figure 5

Relationship between the number of birds foraging in Praia Grande, southeastern Brazil, and predictor variables. A: Sula leucogaster and humans; B: Sula leucogaster and wind speed; C: Larus dominicanus and swash width (m). The points represent the mean values per sampling campaign and sector (high impact, moderate impact, and low impact).
Relationship between the number of birds foraging in Praia Grande, southeastern Brazil, and predictor variables. A: Sula leucogaster and humans; B: Sula leucogaster and wind speed; C: Larus dominicanus and swash width (m). The points represent the mean values per sampling campaign and sector (high impact, moderate impact, and low impact).
DOI: https://doi.org/10.26881/oahs-2023.3.03 | Journal eISSN: 1897-3191 | Journal ISSN: 1730-413X
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Language: English
Page range: 287 - 298
Submitted on: Feb 24, 2023
Accepted on: Jun 12, 2023
Published on: Oct 9, 2023
Published by: University of Gdańsk
In partnership with: Paradigm Publishing Services
Publication frequency: 4 issues per year
Keywords:
Coastal birds,
ecotourism,
spatial distribution,
anthropogenic impact
Related subjects:
Chemistry,
Chemistry, other,
Geosciences,
Geosciences, other,
Life sciences,
Life sciences, other

© 2023 Leonardo Costa, Danilo Freitas Rangel, Ilana Zalmon, published by University of Gdańsk
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

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