We studied diet variation in an omnivorous fish across its range, which allowed us to test predictions about the effect of ocean temperature and habitat on herbivory. Throughout most of its geographic range, from Southern California to central Baja California, the opaleye (Girella nigricans) fed primarily on red and green algae, but there was significant variation in the amount of algal materia...

Sequence divergence in the internal transcribed spacer region 1 (ITS-1) of the ribosomal DNA locus was assessed in subspecies of the coastal North American tiger beetle, Cicindela dorsalis. The spacer region was amplified using the polymerase chain reaction and cloned for sequencing. Of a total of 50 clones obtained from 12 specimens, 42 clones were different in at least one nucleotide position...

This paper presents a brief review of risk studies in Geography since the beginning 20th century, from approaches focused on physical-natural components or social aspects, to perspectives that incorporate systemic approach seeking understand and explain issues at spatial level. The considers principles interaction between multiple variables dynamic organization processes, as part new formulatio...

In this position paper we discuss the evolution of an object-oriented framework for GIS applications into a platform for dealing with mobile users and geographic objects. We first motivate our research by discussing the state of the art of mobile GIS applications, the so-called location-based services using a simple scenario. We briefly describe an object-oriented architecture for dealing with ...

Visualization of maps to explore relevant geographic areas is one of the common practices in spatial decision scenarios. However visualizing geographic distribution with multidimensional criteria becomes a nontrivial setup in the conventional point based map space. In this work we present a novel method to generalize from point data to spatial distributions, captivating on the swarm intelligenc...

Every species occupies a limited geographic area, but it remains unclear why traits that limit distribution do not evolve to allow range expansion. Hypotheses for the evolutionary stability of geographic ranges assume that species are maladapted at the range boundary and unfit beyond the current range, but this assumption has rarely been tested. To examine how fitness varies across species' ran...

Background: Developmental dysplasia of the hip (DDH), formerly known as congenital dislocation of the hip (CDH) is a common congenital malformation which occurs worldwide with variable frequencies in respect to the race and geographic distribution.   Objective: To determine the incidence of DDH, its predisposing factors and the diagnostic value of click for its detection.  Methods: In a cross-s...

This article describes SPACEREF, a corpus of street-level geographic descriptions. Pedestrians are walking a route in a real urban environment, describing their actions. Their position is automatically logged, their speech is manually transcribed, and their references to objects are manually annotated with respect to a crowdsourced geographic database. We describe how the data was collected and...