| 摘 要： |
Typical water-energy dynamics hypothesis assumes that the effects of water and energy on species richness vary geographically, and there is a latitudinal shift from water dominated to energy dominated. However, the effects of available water and energy on species richness patterns might be influenced by local climate change. In this study, geographically weighted regression was used to quantitatively analyze the relationship between pteridophyte species richness and water as well as energy. The effect of local climate conditions on richness was estimated by establishing the energy and water model. The results showed that the relationship between Chinese pteridophyte richness and water was stronger than that with energy across the country. There was no latitudinal transition line from water dominance to energy dominance in China. Furthermore, the sensitivity of pteridophyte richness to the changes in ambient climatic factors increased with the decrease in water and energy availability. Overall, pteridophyte richness is more dependent on available water than energy, and the decrease of water and energy availability is crucial for limiting pteridophyte richness. As global climate change intensifies, the threat to pteridophyte richness in cold and arid regions will become more severe, and more attention should be given to the monitoring and conservation of species diversity in these regions. |
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