Changes in vegetation from 1990 to 2000 were examined at 10 high country localities, representing four grassland types: fescue tussock (Festuca novae-zelandiae), snow tussock (Chionochloa rigida), red tussock (C. rubra), and silver tussock (Poa cita). At each locality, three treatments were established: ambient sheep+rabbit grazing, rabbit grazing only, and no grazing. The mutivariate methods o...

Sandplain heathlands are disturbance-dependent plant communities that occur infrequently in coastal areas of the northeastern United States. We hypothesize that salt spray plays a role in maintaining the composition of the heathland community by excluding salt-intolerant species close to the ocean. We examined the distributions of Solidago nemoralis, Myrica pensylvanica, Pinus rigida, and Querc...

Parasitological and immunological diagnoses were part of a study conducted among 151 children, 83 immunocompromised (IC) and 68 non-immunocompromised (non-IC) aged from zero to 12, seen at the University Hospital, Universidade Federal de Uberlândia, State of Minas Gerais, Brazil, from February, 1996, to June, 1998. Three fecal samples from each child were analyzed for the parasitological diagno...

Halophytes, gypsicoles and serpentinicoles are adapted to specialized edaphic conditions at arid semi-arid regions. These areas possess physical chemical stress factors for all plants. For these plants, one of the most important parameter that provides tolerance is proline accumulation. Proline a water-soluble amino acid generally accumulated under behave like an indicator adaptation plants aga...

Molecular phylogenies and their application to biogeoGiven the insights of Kondo et al. [1] regarding the graphic questions, as illustrated by Kondo et al. [1] in their study of Livistona palms in Australia, are providing unprecedented insight into speciation and the historical movement of taxa around the world [2]. While such studies often allow for the clarification of taxonomic relationships...