É possível detectar grupos emergentes em taxocenose de plantas anuais?

Detalhes bibliográficos
Ano de defesa: 2013
Autor(a) principal: Domingues, Camila Ângelo Jerônimo
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Dissertação
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Não Informado pela instituição
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: http://www.repositorio.ufc.br/handle/riufc/31602
Resumo: The emerging groups correspond to one type of classification based species functional trait. Functional trait corresponds to any morphological, physiological or phenological characteristic that affects growth, reproduction and survival. To verify if there are Emerging Groups in annual plants, as well as if there is greater differentiation among the groups or greater neutrality within them, we selected a taxocenosis of annual plants from a seasonally dry ecosystem. We collect seed bank and monitor the development of plants in a greenhouse. We measured vegetative attributes: plant height, leaf area, specific leaf area, leaf dry matter content, leaf width, leaf thickness and leaf mass per area, and reproductive: mass ratio of seed / fruit mass, size and shape of the dispersion unit, pollination syndromes and dispersion. We made a Canonical Correspondence Analysis and test the consistency of the groups Permutation Multiple Response Procedure. The results of the CCA were presented cluster in dendrogram by UPGMA. Vegetative and reproductive attributes exhibited variation functional between species. Species did not form Emerging Groups, but a gradient of continuous variation. These species differed functionally by trait syndromes, with values overlapping in the same trait. This overlapping allows species to share resources and, consequently, a greater diversity of annual plants occurs in dry seasonal environments.