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Authors

  • Karla Zanenga Scherer Departamento de Ecologia e Zoologia - UFSC
  • Tânia Tarabini Castellani Departamento de Ecologia e Zoologia - UFSC

Abstract

Population ecology of Paepalanthus polyanthus (Bong.) Kunth: temporal variation in the pattern of spatial distribution. The temporal variation in density and pattern of spatial distribution of Paepalanthus polyanthus (Bong.) Kunth (Eriocaulaceae) were evaluated at a determinate sand dune. This study was carried out over a period of five years, at three permanent plots of 25 m2 in a sand dune slack at Joaquina Beach, Florianópolis, SC, Brazil. There were strong density fluctuations throughout these years. In areas 1, 2 and 3, the densities changed from 10.4, 2.2 and 1.8 plants/m2 in December 1986 to 75.8, 11.4 and 45.6 plants/m 2 in December 1991. Area 3, situated on an elevated site, presented greater variation in density, with no live plants in December 1989 and 102.2  plants/m2 at the recruitment observed in May 1990. Despite these density fluctuations, the pattern of spatial distribution was always aggregated (Id > 1, P<0.05). The greatest Id values occurred in periods of low density and not in those of high density, associated with seedling recruitment. Factors such as high seed production with low dispersal, massive germination in moist years and a comparatively high death rate of seedlings at sites more subject to flooding or more distant from the water table proved themselves able to promote this aggregate pattern and increase it during plant development.

Author Biographies

Karla Zanenga Scherer, Departamento de Ecologia e Zoologia - UFSC

Possui Graduação em Ciências Biológicas Bacharelado pela Universidade Federal de Santa Catarina, Graduação em Ciências Biológicas Licenciatura pela Universidade Federal de Santa Catarina e Doutorado em Biologia Animal pela Universidade Federal do Rio Grande do Sul. Atualmente é técnica de laboratório - biologia da Universidade Federal de Santa Catarina.

Mais informações no Currículo Lattes.

Tânia Tarabini Castellani, Departamento de Ecologia e Zoologia - UFSC

Possui Graduação pela Universidade Federal do Rio de Janeiro, Mestrado em Ecologia pela Universidade Estadual de Campinas e Doutorado em Ecologia pela Universidade Estadual de Campinas. Atualmente é Professor adjunto IV da Universidade Federal de Santa Catarina.

Mais informações no Currículo Lattes.

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Published

2004-01-01

Issue

Vol. 17 No. 2 (2004)

Section

Artigos

License

Copyright (c) 2004 Karla Zanenga Scherer, Tânia Tarabini Castellani

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