We propose a modified nonparametric Baumgartner-Weiβ-Schindler test and investigate its use in testing for trends among K binomial populations. Exact conditional and unconditional approaches to p-value calculation are explored in conjunction with the statistic in addition to a similar test statistic proposed by Neuhäuser (2006), the unconditional approaches considered including the maximization...

Odontarrhena bertolonii is an endemic serpentine species of Tuscany and Liguria a model system for nickel-hyperaccumulation research in plants. Phenotypic, genetic karyological variability between populations was previously detected, but existence distribution cytotypes unknown. Accordingly, we examined ploidy level eight from the range tested polyploid fitness hypothesis by analysing relations...

The volatile fraction of Ophrys sphegodes Mill. subsp. sphegodes, Ophrys bertolonii subsp. benacensis (Reisigl) O. Danesch, E. Danasch & Ehrend. and Neotinea tridentata (Scop.) R.M. Bateman, Pridgeon & M.W. Case, three orchid species with different pollinator attraction strategies, sampled in vivo and in situ, were evaluated by headspace solid phase microextraction coupled with gas-chro...

Abstract Nonnative plant invasions can have devastating effects on native communities; conversely, management efforts nontarget and deleterious impacts desirable plants. In the arid sagebrush steppe rangelands of western United States, nonnative winter annual species affect forage production biodiversity. One method proposed to control these is suppress soil seedbank using preemergent herbicide...