We investigated how plant species' responses to soil texture might affect coexistence by analysing distributions, seedling emergence and performance, and competitive abilities of the winter annuals Clarkia speciosa ssp. polyantha and C. xantiana ssp. xantiana.
This database includes all records of Collembola which are or were in the Collection of K. Christiansen. The records are mainly from North America but include some specimens from Mexico and Lebanon, Syria and China
Using field measurements, two common garden studies, and QST-FST analyses, we examined environmental and genetic influences on plant phenotype across the geographical range of Clarkia xantiana ssp. xantiana.
We examine the contribution of plant pollinator interactions to the geographic range limit of the California endemic plant Clarkia xantiana ssp. xantiana. We show that pollinator availability declined from the center to the margin of the geographic range consistently across four years of study.