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The Interaction Of Phylogeny And Community Structure: Linking The Community Composition And Trait Evolution Of Clades, William D. Pearse, Pierre Legendre, Pedro R. Peres-Neto, T. Jonathan Davies

Ecology Center Publications

Aim

Community phylogenetic studies use information about the evolutionary relationships of species to understand the ecological processes of community assembly. A central premise of the field is that the evolution of species maps onto ecological patterns, and phylogeny reveals something more than species traits alone about the ecological mechanisms structuring communities, such as environmental filtering, competition, and facilitation. We argue, therefore, that there is a need for better understanding and modelling of the interaction of phylogeny with species traits and community composition.

Innovation

We outline a new approach that identifies clades that are ecophylogenetically clustered or overdispersed and assesses whether …

Genetic Differentiation Between Two Species Of Buckwheat (Eriogonum), Paul G. Wolf, Jenessa B. Lemon

Browse all Datasets

Discovering the extent of genetic differentiation between closely related taxa facilitates decisions regarding species protection under the Endangered Species Act. Here, we analyze genotype data to explore the relatedness of two buckwheat species: Eriogonum soredium Reveal- a narrow endemic under consideration for protection, and a widespread close relative, Eriogonum shockleyi S. Watson. Eriogonum soredium grows only on Ordovician limestone outcroppings in west central Utah, whereas the range of E. shockleyi is broad, spanning the western United States from Colorado to California, and Idaho to Arizona. Eriogonum shockleyi is suspected of hybridizing with other buckwheats throughout this range. We detected higher …

Factors Influencing The Rates, Processes And Magnitude Of Accumulation Of Carbon In Desert Soils, United States, National Aeronautics And Space Administration

Natural Resources-Planning, Management, and Conservation

In 1991, the Soil Landscape Climate Program (SLCP) was organized as part of the Solid Earth Sciences Program at NASA. Part of the research to be conducted in the SLCP included studies of the systematics of carbon storage and flux in the terrestrial environment, specifically terrestrial soils. This report summarizes the results of the research funded through the SLCP that supported our efforts focussed on the nature of carbon behavior in arid environments, where the majority of the carbon is present as inorganic carbon stored as pedogenic carbonate in desert calcic soils.