Comparison of two thermal-optical methods for the determination of organic carbon and elemental carbon: Results from the southeastern United States

2011 ◽  
Vol 45 (11) ◽  
pp. 1913-1918 ◽  
Author(s):  
Yuan Cheng ◽  
Mei Zheng ◽  
Ke-bin He ◽  
Yingjun Chen ◽  
Bo Yan ◽  
...  
Paleobiology ◽  
1981 ◽  
Vol 7 (3) ◽  
pp. 305-307 ◽  
Author(s):  
John C. Briggs

A current question being debated with considerable intensity is whether or not certain geographic areas act as centers of evolutionary radiation and supply species to other areas that are less active or less effective in an evolutionary sense. Darwin (1859) was the first to write about centers of origin which he called “single centers of creation.” He argued that each species was first produced within a single region and that it subsequently migrated from that area as far as its powers of migration and subsistence under past and present conditions permitted. Adams (1902), in discussing the influence of the southeastern United States as a center of distribution for the flora and fauna of North America, provided a series of criteria for the determination of “centers of dispersal.” His first, and evidently most important criterion was the location of “the greatest differentiation of a type.”


2004 ◽  
Vol 18 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
G. Brooks Avery ◽  
Robert J. Kieber ◽  
Joan D. Willey ◽  
G. Christopher Shank ◽  
Robert F. Whitehead

2017 ◽  
Vol 19 (12) ◽  
pp. 1505-1517 ◽  
Author(s):  
Allison M. Jensen ◽  
Todd M. Scanlon ◽  
Ami L. Riscassi

The amount of streamwater mercury associated with suspended solids was an order of magnitude greater following a low-intensity wildfire.


2008 ◽  
Vol 42 (24) ◽  
pp. 9122-9128 ◽  
Author(s):  
Xiang Ding ◽  
Mei Zheng ◽  
Eric S. Edgerton ◽  
John J. Jansen ◽  
Xinming Wang

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