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Abstract:

We examined the respective roles of climate and vegetation structure on geographical variation in bird species richness. The Province of Buenos Aires (central-eastern Argentina) was divided into 146 squares of 50 km on a side. For each square we evaluated the number of bird species, the value of thirteen climatic variables, and the value of a vegetation strata index. The climatic matrix was analyzed by Principal Component Analysis (PCA), and the first factors resulting from PCA were considered as multifactorial climatic gradients. Simple and Partial Correlation Analysis among bird species richness, vegetation strata, and the first two factors derived from PCA (65% of total variation) indicated that bird richness distribution was determined by the availability of vegetation strata, associated with different vegetation types that, at the same time, were influenced by the climatic conditions summarized in the first climatic factor (a gradient of precipitation, relative humidity, annual termical amplitude, and frost occurrence). This relationships reflect the complexity of factors that can act directly as well as indirectly on the geographical patterns in species richness. Also, we evaluated the importance of study scale comparing our results with previous studies at macrogeographic and local scales, found out that the vegetation structure was the principal determinant of bird species richness at this three geographical scales.

Registro:

Documento: Artículo
Título:Determinants of bird species richness: Role of climate and vegetation structure at a regional scale
Autor:Cueto, V.R.; De Casenave, J.L.
Filiación:División Ornitologia, Museo Argentino Cie. Nat. B., Av. Angel Gallardo 470, 1405 Buenos Aires, Argentina
Departamento de Biología, Fac. de Ciencias Exactas y Naturates, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Palabras clave:Argentina; Bird species richness; Buenos Aires Province; Climatic gradients; Spatial scale; Vegetation structure; avifauna; climate effect; scale effect; species richness; vegetation structure; Argentina
Año:1999
Volumen:26
Número:3
Página de inicio:487
Página de fin:492
DOI: http://dx.doi.org/10.1046/j.1365-2699.1999.00299.x
Título revista:Journal of Biogeography
Título revista abreviado:J. Biogeogr.
ISSN:03050270
CODEN:JBIOD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03050270_v26_n3_p487_Cueto

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Citas:

---------- APA ----------
Cueto, V.R. & De Casenave, J.L. (1999) . Determinants of bird species richness: Role of climate and vegetation structure at a regional scale. Journal of Biogeography, 26(3), 487-492.
http://dx.doi.org/10.1046/j.1365-2699.1999.00299.x
---------- CHICAGO ----------
Cueto, V.R., De Casenave, J.L. "Determinants of bird species richness: Role of climate and vegetation structure at a regional scale" . Journal of Biogeography 26, no. 3 (1999) : 487-492.
http://dx.doi.org/10.1046/j.1365-2699.1999.00299.x
---------- MLA ----------
Cueto, V.R., De Casenave, J.L. "Determinants of bird species richness: Role of climate and vegetation structure at a regional scale" . Journal of Biogeography, vol. 26, no. 3, 1999, pp. 487-492.
http://dx.doi.org/10.1046/j.1365-2699.1999.00299.x
---------- VANCOUVER ----------
Cueto, V.R., De Casenave, J.L. Determinants of bird species richness: Role of climate and vegetation structure at a regional scale. J. Biogeogr. 1999;26(3):487-492.
http://dx.doi.org/10.1046/j.1365-2699.1999.00299.x