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Aeolian Nutrient Fluxes Following Wildfire In Sagebrush Steppe: Implications For Soil Carbon Storage, N. J. Hasselquist, M. J. Germino, J. B. Sankey, L. J. Ingram, N. F. Glenn
Aeolian Nutrient Fluxes Following Wildfire In Sagebrush Steppe: Implications For Soil Carbon Storage, N. J. Hasselquist, M. J. Germino, J. B. Sankey, L. J. Ingram, N. F. Glenn
Nancy Glenn
Pulses of aeolian transport following fire can profoundly affect the biogeochemical cycling of nutrients in semi-arid and arid ecosystems. Our objective was to determine horizontal nutrient fluxes occurring in the saltation zone during an episodic pulse of aeolian transport that occurred following a wildfire in a semi-arid sagebrush steppe ecosystem in southern Idaho, USA. We also examined how temporal trends in nutrient fluxes were affected by changes in particle sizes of eroded mass as well as nutrient concentrations associated with different particle size classes. In the burned area, total carbon (C) and nitrogen (N) fluxes were as high as 235 …
Dna And Morphology: Comparisons In The Onagraceae, Kenneth J. Sytsma, James F. Smith
Dna And Morphology: Comparisons In The Onagraceae, Kenneth J. Sytsma, James F. Smith
James F. Smith
Comparisons of systematic information generated from both classical systematic approaches and from DNA analysis at a number of taxonomic levels in the Onagraceae are presented. Phylogenetic results from chloroplast DNA restriction fragment analysis is in Clarkia sect. Syrnpherica (= Peripetasma) are not entirely congruent with results from morphology , but are congruent with distribution of duplications of isozyme-coding loci. Chloroplast DNA and nuclear rDNA evidence for the origin of the monotypic genus Heterogaura from within the genus Clarkia is discussed with respect to morphological divergence between the two genera. Detailed chloroplast DNA restriction site mapping within the seven diploid sections …