globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gbi.12235
Scopus记录号: 2-s2.0-85017182203
论文题名:
Climate and geochemistry as drivers of eucalypt diversification in Australia
作者: Bui E.N.; Thornhill A.H.; González-Orozco C.E.; Knerr N.; Miller J.T.
刊名: Geobiology
ISSN: 1472-4677
EISSN: 1472-4669
出版年: 2017
卷: 15, 期:3
起始页码: 427
结束页码: 440
语种: 英语
英文关键词: abiotic factors ; Angophora ; biodiversity ; biogeography ; Corymbia ; endemic species ; eucalypt ; Eucalyptus ; species richness ; species turnover ; Symphyomyrtus
Scopus关键词: abiotic factor ; assembly rule ; biodiversity ; biogeography ; Cenozoic ; climate effect ; coevolution ; endemic species ; evergreen tree ; geochemistry ; macroecology ; Miocene ; spatial distribution ; species diversity ; species richness ; Australia ; Angophora ; Eucalyptus ; element ; soil ; Australia ; biodiversity ; chemistry ; classification ; climate ; electric conductivity ; Eucalyptus ; genetics ; growth, development and aging ; pH ; phylogeography ; soil ; Australia ; Biodiversity ; Climate ; Electric Conductivity ; Elements ; Eucalyptus ; Hydrogen-Ion Concentration ; Phylogeography ; Soil
Scopus学科分类: Earth and Planetary Sciences: General Earth and Planetary Sciences ; Environmental Science: General Environmental Science ; Agricultural and Biological Sciences: Ecology, Evolution, Behavior and Systematic
英文摘要: Eucalypts cover most of Australia. Here, we investigate the relative contribution of climate and geochemistry to the distribution and diversity of eucalypts. Using geostatistics, we estimate major element concentrations, pH, and electrical conductivity at sites where eucalypts have been recorded. We compare the median predicted geochemistry and reported substrate for individual species that appear associated with extreme conditions; this provides a partial evaluation of the predictions. We generate a site-by-species matrix by aggregating observations to the centroids of 100-km-wide grid cells, calculate diversity indices, and use numerical ecology methods (ordination, variation partitioning) to investigate the ecology of eucalypts and their response to climatic and geochemical gradients. We find that β-diversity coincides with variations in climatic and geochemical patterns. Climate and geochemistry together account for less than half of the variation in eucalypt species assemblages across Australia but for greater than 80% in areas of high species richness. Climate is more important than geochemistry in explaining eucalypts species distribution and change in assemblages across Australia as a whole but there are correlations between the two sets of environmental variables. Many individual eucalypt species and entire taxonomic sections (Aromatica, Longistylus of subgenus Eucalyptus, Dumaria, and Liberivalvae of subgenus Symphyomyrtus) have distributions affected strongly by geochemistry. We conclude that eucalypt diversity is driven by steep geochemical gradients that have arisen as climate patterns have fluctuated over Australia over the Cenozoic, generally aridifying since the Miocene. The diversification of eucalypts across Australia is thus an excellent example of co-evolution of landscapes and biota in space and time and challenges accepted notions of macroecology. © 2017 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85057
Appears in Collections:影响、适应和脆弱性

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作者单位: CSIRO Land and Water, Canberra, ACT, Australia; Centre for Australian National Biodiversity Research, CSIRO Plant Industry, Canberra, ACT, Australia; Australian Tropical Herbarium, James Cook University, Cairns, Qld, Australia; Office of International Science and Engineering, National Science Foundation, Arlington, VA, United States; Corporación Colombiana de Investigación Agropecuaria, Corpoica, km 17 Vía Puerto López, Meta, Colombia

Recommended Citation:
Bui E.N.,Thornhill A.H.,González-Orozco C.E.,et al. Climate and geochemistry as drivers of eucalypt diversification in Australia[J]. Geobiology,2017-01-01,15(3)
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