New PDF release: An Atlas of the World's Conifers: An Analysis of Their

By Aljos Farjon

ISBN-10: 9004211802

ISBN-13: 9789004211803

A 2014 selection journal "Outstanding educational name" "An Atlas of the realm s Conifers" is the 1st ever atlas of all identified conifer species. it's a accomplished paintings describing the usual distribution, biogeography, variety and conservation prestige of the conifers on all continents."

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Additional resources for An Atlas of the World's Conifers: An Analysis of Their Distribution, Biogeography, Diversity, and Conservation Status

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Map of North America showing numbers of conifer species + infraspecific taxa per one degree cell. 38 north america Maps NA-3 and NA-4 show that the areas with the greatest taxonomic diversity of conifers are California and the Pacific Northwest of the USA. A lesser centre of diversity, particularly at genus level, is situated in the New England states and adjacent parts of Ontario, Canada. In the West, the area with high generic diversity is larger than the area with high species diversity. The latter is more concentrated in California and especially N California + SW Oregon and this is also the region with the top number of 11–12 genera per degree cell.

This virtually complete taxonomic separation at species rank suggests a lengthy geographical separation. The American Great Plains were an inland sea until the end of the Cretaceous. Tropical lowland forests dominated during the Eocene and grassland steppes from the Miocene onward. Only a few junipers occasionally occur in this vast region now, most of them in Texas.  The distribution of species in Pinaceae (black), Taxaceae (yellow) and Cupressaceae (red) in the contiguous United States. 1% of the landmass.

The division between E and W is well demonstrated in map NA-2 below, where the central prairie states, where not devoid of conifers, contain only Cupressaceae (= Juniperus) and Pinaceae and Taxaceae are widely separated in an eastern and a western section. In the contiguous USA both east and west have their own distinct species. This virtually complete taxonomic separation at species rank suggests a lengthy geographical separation. The American Great Plains were an inland sea until the end of the Cretaceous.

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An Atlas of the World's Conifers: An Analysis of Their Distribution, Biogeography, Diversity, and Conservation Status by Aljos Farjon


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