Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression
Water and energy have emerged as the best contemporary environmental correlates of broad-scale species richness patterns. A corollary hypothesis of water–energy dynamics theory is that the influence of water decreases and the influence of energy increases with absolute latitude. We report the first...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.288.5215 2023-05-15T15:09:59+02:00 Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression Wolf L. Eiserhardt Stine Bjorholm Jens-christian Svenning Thiago F. Rangel Henrik Balslev The Pennsylvania State University CiteSeerX Archives application/zip http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.288.5215 en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.288.5215 Metadata may be used without restrictions as long as the oai identifier remains attached to it. ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/16/22/PLoS_One_2011_Nov_3_6(11)_e27027.tar.gz text ftciteseerx 2016-01-07T21:24:23Z Water and energy have emerged as the best contemporary environmental correlates of broad-scale species richness patterns. A corollary hypothesis of water–energy dynamics theory is that the influence of water decreases and the influence of energy increases with absolute latitude. We report the first use of geographically weighted regression for testing this hypothesis on a continuous species richness gradient that is entirely located within the tropics and subtropics. The dataset was divided into northern and southern hemispheric portions to test whether predictor shifts are more pronounced in the less oceanic northern hemisphere. American palms (Arecaceae, n = 547 spp.), whose species richness and distributions are known to respond strongly to water and energy, were used as a model group. The ability of water and energy to explain palm species richness was quantified locally at different spatial scales and regressed on latitude. Clear latitudinal trends in agreement with water–energy dynamics theory were found, but the results did not differ qualitatively between hemispheres. Strong inherent spatial autocorrelation in local modeling results and collinearity of water and energy variables were identified as important methodological challenges. We overcame these problems by using simultaneous autoregressive models and variation partitioning. Our results show that the ability of water and energy to explain species richness changes not only across large climatic gradients spanning tropical to temperate or arctic zones but also within megathermal climates, at least for strictly tropical taxa such as palms. This finding suggests that the predictor shifts are Text Arctic Unknown Arctic |
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Water and energy have emerged as the best contemporary environmental correlates of broad-scale species richness patterns. A corollary hypothesis of water–energy dynamics theory is that the influence of water decreases and the influence of energy increases with absolute latitude. We report the first use of geographically weighted regression for testing this hypothesis on a continuous species richness gradient that is entirely located within the tropics and subtropics. The dataset was divided into northern and southern hemispheric portions to test whether predictor shifts are more pronounced in the less oceanic northern hemisphere. American palms (Arecaceae, n = 547 spp.), whose species richness and distributions are known to respond strongly to water and energy, were used as a model group. The ability of water and energy to explain palm species richness was quantified locally at different spatial scales and regressed on latitude. Clear latitudinal trends in agreement with water–energy dynamics theory were found, but the results did not differ qualitatively between hemispheres. Strong inherent spatial autocorrelation in local modeling results and collinearity of water and energy variables were identified as important methodological challenges. We overcame these problems by using simultaneous autoregressive models and variation partitioning. Our results show that the ability of water and energy to explain species richness changes not only across large climatic gradients spanning tropical to temperate or arctic zones but also within megathermal climates, at least for strictly tropical taxa such as palms. This finding suggests that the predictor shifts are |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Wolf L. Eiserhardt Stine Bjorholm Jens-christian Svenning Thiago F. Rangel Henrik Balslev |
spellingShingle |
Wolf L. Eiserhardt Stine Bjorholm Jens-christian Svenning Thiago F. Rangel Henrik Balslev Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression |
author_facet |
Wolf L. Eiserhardt Stine Bjorholm Jens-christian Svenning Thiago F. Rangel Henrik Balslev |
author_sort |
Wolf L. Eiserhardt |
title |
Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression |
title_short |
Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression |
title_full |
Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression |
title_fullStr |
Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression |
title_full_unstemmed |
Testing the Water–Energy Theory on American Palms (Arecaceae) Using Geographically Weighted Regression |
title_sort |
testing the water–energy theory on american palms (arecaceae) using geographically weighted regression |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.288.5215 |
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Arctic |
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Arctic |
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Arctic |
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Arctic |
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ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/16/22/PLoS_One_2011_Nov_3_6(11)_e27027.tar.gz |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.288.5215 |
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Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766341073580326912 |