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You are here: Home / Associated publications / Belgian Journal of Zoology / Bibliographic References / Habitat and territory segregation within Sylviine warblers of the Flemish coastal dunes

Dries Bonte, Sam Provoost and Maurice Hoffmann (2001)

Habitat and territory segregation within Sylviine warblers of the Flemish coastal dunes

BELGIAN JOURNAL OF ZOOLOGY, 131(S2):49-57.

Sylviine warblers are abundant breeding birds in the Flemish coastal dunes. Although their habitat preferences are clearly different, habitat overlap can occur. Their habitat preferences can largely be explained by the overall territory-specific vegetation structure (all components included in the discriminant analysis). The transition from woodland to scrubs and from scrubland to short grasslands explains 92\% of the total variance within the species' habitat characteristics. Species of the different genera (Sylvia, Phylloscopus, Acrocephalus, Locustella) show a large amount of habitat overlap. Within the Phylloscopus and Sylvia-genus, only the Lesser Whitethroat S. curruca and the Whitethroat S. communis use the same breeding habitat. Although the other congeneric species show distinct habitat characteristics, a priori classification cannot predict territory occupancy without errors: only 78.3\% of the two Phylloscopus-territories and 58.3\% of the Sylvia-territories were correctly classified. This indicates a certain amount of territory settlement in non-typical habitats, where competition can occur between sister species. All possible interactions between congenerics were studied by comparing the expected (based on the total of wrong classifications in the typical habitat of the other) and the observed coexistence. The number of wrong classifications could only be explained by real coexistence in the species pair S. borin-S. curruca. Interactions between all other congeneric species pairs were asymmetrical, resulting in distinct territory occupancy with one dominant species. S. borin was always the dominant species, whereas S. communis was never dominant within the possible interactions. In general, species typical for higher vegetation were dominant (with the exception of the species pair S. atricapilla-S. borin). Direct and song aggressiveness are probably the driving forces for the observed territory segregation. Our results confirm and supplement the findings of CODY (1978), who studied similar habitat and territory segregation in Sylviine Warblers in England, Southern Sweden and Sardinia.

Acrocephalus; Locustella; Phylloscopus; Sylvia; interspecific interactions; habitat characteristics; vegetation; discriminant function analysis; Geographic Information System
BJZ

ISSN 2295-0451 (online version)
ISSN 0777-6279 (printed version)
impact factor 2015: 0,87.

Editor-in-Chief:
Prof. Dr. Isa Schön
Royal Belgian Institute of Natural Sciences
Vautierstraat 29
1000 Brussels, Belgium

 



1863-1903
Annales de la Société malacologique de Belgique
 
1903-1923
​Annales de la Société royale malacologique et zoologique de Belgique
 
1923-1989
Annales de la Société Royale Zoologique de Belgique
 
1989-
Belgian Journal of Zoology