Raptorial birds and environmental gradients in the southern Neotropics: A test of species-richness hypotheses
We investigated the spatial patterns of raptor species richness in the southern Neotropics and tested three hypotheses that were most likely to explain spatial variations: ambient energy, productivity and habitat heterogeneity. We used non-linear regression analysis and eliminated alternative hypoth...
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2005
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| Acceso en línea: | Registro en Scopus DOI Handle Registro en la Biblioteca Digital |
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| LEADER | 08930caa a22008657a 4500 | ||
|---|---|---|---|
| 001 | PAPER-3793 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203315.0 | ||
| 008 | 190411s2005 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-31344474823 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 030 | |a AUECF | ||
| 100 | 1 | |a Bellocq, M.I. | |
| 245 | 1 | 0 | |a Raptorial birds and environmental gradients in the southern Neotropics: A test of species-richness hypotheses |
| 260 | |c 2005 | ||
| 270 | 1 | 0 | |m Bellocq, M.I.; Departamento de Ecología, Genética Y Evolución, FCEN-Universidad de Buenos Aires, Ciudad Universitaria Pab. 2, Buenos Aires 1428, Argentina; email: bellocq@bg.fcen.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a We investigated the spatial patterns of raptor species richness in the southern Neotropics and tested three hypotheses that were most likely to explain spatial variations: ambient energy, productivity and habitat heterogeneity. We used non-linear regression analysis and eliminated alternative hypotheses by finding the best single environmental predictor of raptor species richness among potential evapotranspiration (PET), actual evapotranspiration (AET), mean annual temperature and precipitation and vegetation structure coefficient. As expected, the number of raptor species decreases monotonically as latitude increases. Raptor species richness was significantly correlated with each of the environmental factors considered in this study, reflecting covariation of climatic and habitat descriptors. Correlation coefficients showed positive associations between species richness and each single environmental variable. Mean annual temperature was the strongest environmental predictor of raptor species richness (explaining 82% of the variance), consistent with the ambient energy hypothesis. Another descriptor of ambient energy (PET) explained 75% of the spatial variation. Both the AET and the vegetation structure coefficient explained 77% of the spatial variation in richness. The spatial clusters of extreme residuals identified the subtropical rainforests and the and heights and low plateaux of the study area as regions where local environmental conditions appear to interfere with the general trend identified by the model at the regional scale. |l eng | |
| 593 | |a Departamento de Ecología, Genética Y Evolución, FCEN-Universidad de Buenos Aires, Ciudad Universitaria Pab. 2, Buenos Aires 1428, Argentina | ||
| 593 | |a School of Applied Geography, Ryerson University, Toronto, Ont., Canada | ||
| 690 | 1 | 0 | |a BIRDS |
| 690 | 1 | 0 | |a NEOTROPICS |
| 690 | 1 | 0 | |a RAPTORS |
| 690 | 1 | 0 | |a SPATIAL PATTERNS |
| 690 | 1 | 0 | |a SPECIES-RICHNESS HYPOTHESES |
| 690 | 1 | 0 | |a BIOENERGETICS |
| 690 | 1 | 0 | |a ENVIRONMENTAL GRADIENT |
| 690 | 1 | 0 | |a HABITAT STRUCTURE |
| 690 | 1 | 0 | |a PRODUCTIVITY |
| 690 | 1 | 0 | |a RAPTOR |
| 690 | 1 | 0 | |a SPECIES RICHNESS |
| 690 | 1 | 0 | |a RAPTORES |
| 650 | 1 | 7 | |2 spines |a AVES |
| 700 | 1 | |a Gómez-Insausti, R. | |
| 773 | 0 | |d 2005 |g v. 30 |h pp. 892-898 |k n. 8 |p Austral Ecol. |x 14429985 |w (AR-BaUEN)CENRE-3871 |t Austral Ecology | |
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| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_14429985_v30_n8_p892_Bellocq |y Handle |
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