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Titolo:
MACROENVIRONMENTAL FACTORS AS ULTIMATE DETERMINANTS OF DISTRIBUTION OF COMMON TOAD AND NATTERJACK TOAD IN THE SOUTH OF SPAIN
Autore:
ROMERO J; REAL R;
Indirizzi:
UNIV MALAGA,FAC SCI,DEPT ANIM SCI E-29071 MALAGA SPAIN
Titolo Testata:
Ecography
fascicolo: 3, volume: 19, anno: 1996,
pagine: 305 - 312
SICI:
0906-7590(1996)19:3<305:MFAUDO>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
BUFO-CALAMITA LAUR; HABITAT; BRITAIN;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
48
Recensione:
Indirizzi per estratti:
Citazione:
J. Romero e R. Real, "MACROENVIRONMENTAL FACTORS AS ULTIMATE DETERMINANTS OF DISTRIBUTION OF COMMON TOAD AND NATTERJACK TOAD IN THE SOUTH OF SPAIN", Ecography, 19(3), 1996, pp. 305-312

Abstract

We have analysed the relations between the distribution areas of Bufobufo and Bufo calamita in the south of the Iberian Peninsula. In order to characterise the localities where the species were found, we used24 environmental variables, and we tested their influence on the distribution of both species by nonparametric methods. By means of logistic regression we calculated the odds of finding one or other species ina locality. The environmental parameters that increase the probability of presence of each species and of both species together are relatedwith the climatic stability and with the climatic subregions. Bufo bufo is more likely to be found in areas where the climate is more predictable, probably because in these areas it may exert its competitive superiority over B. calamita. In zones with very low climatic stabilityB. calamita is more likely to be found than B. bufo, probably becauseB. bufo lacks the ability to adapt to unpredictable conditions. In areas with intermediate climatic predictability B. bufo is present, but it would be prevented from removing B. calamita, and so the odds of finding each species al-e equilibrated. In these areas there would be a balance between the superior competitiveness of B. bufo and the higheradaptability of B. calamita. With the same logistic equation we characterise the typical habitats of each species, and also the environments shared by both species.

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Documento generato il 25/11/20 alle ore 07:40:02