Elucidating the ecological processes by which adaptive genetic polymorphism is maintained in heterogeneous environments requires knowledge on the spatial scale at which alternate habitats affect genotype-specific fitness. The general objective of this study was to document patterns of temporal and spatial variation of genetic polymorphism in the acorn barnacle (Semibalanus balanoides) at MPI* a...

Using samples from eastern China (c. 25 - 41° N and 99 - 123° E) and from a common garden experiment, we investigate how Mg concentration varies with climate across multiple trophic levels. In soils, plant tissue (Oriental oak leaves and acorns), and a specialist acorn predator (the weevil Curculio davidi), Mg concentration increased significantly with different slopes from south to north, and ...

acorn crop, 79 , 87 , 90 , 92 , 219 , 226 – 228 , 230 – 232 , 232t13.4 acorn woodpecker, 20 , 73 , 190 , 217 – 234 , 263 , 268 , 356 , 359 , 361 , 365t20.1 , 368 Acridotheres tristis . See common myna Acrocephalus melanopogon . See moustached warbler Acrocephalus sechellensis . See Seychelles warbler adaptive delayed dispersal hypothesis, 362 additive care, 158 Aegithalos caudatus . See long-...

A combination of x-ray fluorescence and image processing has been shown to recover text characters written in iron gall ink on parchment, even when obscured by gold paint. Several leaves of the Archimedes Palimpsest were imaged using rapid-scan, x-ray fluorescence imaging performed at the Stanford Synchrotron Radiation Lightsource of the SLAC National Accelerator Laboratory. A simple linear sho...

N o area of mathematics has attracted more international attention in the past decade than the Palimpsest of Archimedes. The 1998 auction at Christie’s, followed by collaborative work centered at the Walters Art Museum led to traveling museum exhibits, newspaper articles, television specials, and dozens of presentations. Mathematicians and other scholars attracted a new and significant audience...

Numerous interactions between plants and animals vary in their outcome predation mutualism. Depending on the costs benefits, relationship is placed at one end of scale or other. A thin line separates both interactions. Acorn consumption by rodent species has been considered a relationship. Rodents consume acorns, which cost to oaks as they are prevented from colonizing new places. The aim this ...

Abstract Hardwoods resprouting after wildfire or cutting develop as multistemmed clumps that gradually self-thin over time. There is increasing interest in thinning of sprouting species to accelerate the formation tree characteristics important indigenous cultural practices and wildlife such large-diameter stems, large branches, broad crowns, acorn production. We compared responses three treatm...