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Twenty-four fresh marsh-wet prairie wetland sites in southwestern Florida were studied with respect to vegetation zonation, substrate characteristics, and morphometry. Six major wetland zones were identified. TheHypericum zone occupied the shallowest position (closest to the upland edge) and was confined to sandy substrates. ThePanicum-Rhynchospora zone typically followed downslope and was also associated with sandy substrates. TheMixed Emergent,Cladium,Cephalanthus andFraxinus-Salix zones all occurred on organic soils in wetland interiors. In addition to depth and substrate type, other important determinants of zone composition included fire and disturbance due to feral hog rooting and cattle grazing.

Parkinson's disease (PD) is a progressive neurological condition of later life characterized by symptoms of tremor, rigidity, and akinesia. The aim of the present review is to describe the neurological features and the psychological deficits associated with Parkinsonism. Although PD is primarily a disease of the basal ganglia, and motor disabilities dominate the clinical picture, it is apparent that the neuroanatomical damage sustained by these patients is not confined to subcortical structures, and that dementia or other cognitive impairments may occur. Neuropsychological testing has confirmed that the incidence of dementia and more subtle cognitive deficits in PD is higher than in the general population; however, no cognitive deficits exclusive to the disorder have been identified. PD patients have an increased risk of depression, which may be indicative of their problems adjusting to the effects of a chronic and irreversible disease. The clinical psychologist has a role in documenting the cognitive, motor, and affective consequences of the disease, and in evaluating the success with which patients and their families are adapting to associated disabilities.