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Abstract:

Human settlements have a strong influence on bird communities. To explore the size effect of the urbanized area in avian community structure, we examined changes in species richness, composition and abundance along urban-rural gradients of different extensions. We measured land-cover variables and surveyed birds along nine urban-rural gradients in the Pampean region of Argentina. In towns over 7000 inh, increasing constructed area was negatively related to species richness. In towns over 13 000 inh, the abundance of native species decreased towards the urban core whereas total abundance increased, decreased or remained constant depending on town characteristics. In villages (<2000 inh), small (2000-14000 inh) and large towns (>60000 inh), there was a constant representation of the rural community composition along gradients. In towns of intermediate sizes (>14 000-60 000 inh), species composition was more similar to that from the rural zone as this zone was approached. Similarity between both urban-core and peripheral points and the rural zone decreased with increasing gradient extension. It appears to be a size threshold for community sensitivity to urbanization below which the impact on community attributes is insignificant; increasing urbanization above the threshold level had pronounced effects on bird assemblages. Research approaches separating responses of native and exotic species to urbanization enhance our understanding to favor native birds and quality of urban bird communities. The size of the urbanized area is a key factor in policies designed to improve ecosystem health and human interactions with nature. © 2008 Elsevier B.V. All rights reserved.

Registro:

Documento: Artículo
Título:Bird community responses along urban-rural gradients: Does the size of the urbanized area matter?
Autor:Garaffa, P.I.; Filloy, J.; Bellocq, M.I.
Filiación:Dep. Ecología, Genética y Evolución, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pab 2, C1428EHA C.A. Buenos Aires, Argentina
Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina
Palabras clave:Abundance; Argentina; Community similarity; Richness; Spatial patterns; Urbanization; Ecosystems; Forestry; Salinity measurement; Abundance; Argentina; Community similarity; Richness; Spatial patterns; Urbanization; Birds; abundance; bird; community composition; community response; community structure; human settlement; rural area; size effect; species richness; urbanization; Aves
Año:2009
Volumen:90
Número:1-2
Página de inicio:33
Página de fin:41
DOI: http://dx.doi.org/10.1016/j.landurbplan.2008.10.004
Título revista:Landscape and Urban Planning
Título revista abreviado:Landsc. Urban Plann.
ISSN:01692046
CODEN:LUPLE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01692046_v90_n1-2_p33_Garaffa

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Citas:

---------- APA ----------
Garaffa, P.I., Filloy, J. & Bellocq, M.I. (2009) . Bird community responses along urban-rural gradients: Does the size of the urbanized area matter?. Landscape and Urban Planning, 90(1-2), 33-41.
http://dx.doi.org/10.1016/j.landurbplan.2008.10.004
---------- CHICAGO ----------
Garaffa, P.I., Filloy, J., Bellocq, M.I. "Bird community responses along urban-rural gradients: Does the size of the urbanized area matter?" . Landscape and Urban Planning 90, no. 1-2 (2009) : 33-41.
http://dx.doi.org/10.1016/j.landurbplan.2008.10.004
---------- MLA ----------
Garaffa, P.I., Filloy, J., Bellocq, M.I. "Bird community responses along urban-rural gradients: Does the size of the urbanized area matter?" . Landscape and Urban Planning, vol. 90, no. 1-2, 2009, pp. 33-41.
http://dx.doi.org/10.1016/j.landurbplan.2008.10.004
---------- VANCOUVER ----------
Garaffa, P.I., Filloy, J., Bellocq, M.I. Bird community responses along urban-rural gradients: Does the size of the urbanized area matter?. Landsc. Urban Plann. 2009;90(1-2):33-41.
http://dx.doi.org/10.1016/j.landurbplan.2008.10.004