Trophic accumulation of mercury (Hg) in aquatic ecosystems is of global concern due to health effects associated with eating fish with elevated Hg levels. The methylated form of Hg bioaccumulates so it is important to understand how inorganic Hg is transformed to methylmercury in the environment. Here, a new site for Hg methylation, the periphyton communities that are prevalent in the Florida E...

ABSTRACT Pollination of the edible fig (Ficus carica cv. Calimyrna) is mediated by a small symbiotic wasp, Blastophaga psenes, that inhabits the syconium cavity of the spring crop of fig pollinator trees (caprifigs). These fig wasps also carry propagules, mainly of Fusarium verticillioides (formerly F. moniliforme) and other Fusarium spp., which cause endosepsis, from pollinator figs to the edi...

Contents Introduction 615 General definitions and notation 618 § 1. Shadow geometries of incidence geometries 619 § 2. Shadow geometries of chamber systems and their geometrical reali-zations 626 § 3. Interpreting the shadow geometries as tessellations. .. . 6 3 1 § 4. Transitive tessellations for reflection groups 636 § 5. The Delaney symbols of the tessellations with a transitive reflection g...