Jorge Capelo

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Instituto Nacional de Recursos Biológicos
Unidade de Silvicultura e Produtos Florestais
Oeiras , 2780-159 , Portugal

Publications in Fire Ecology

Germination Patterns of Soil Seed Banks in Relation to Fire in Portuguese Littoral Pine Forest Vegetation
Pages: 1-15
DOI: 10.4996/fireecology.0603001

Germination behavior of maritime pine (Pinus pinaster Aiton) forests soil seed banks after fire treatments in controlled laboratory conditions was analyzed. Germination response of all tree and shrub seeds after wildfires in the Leiria National Forest, Portugal, was simulated by treating sample trays of soil seed banks with distinct combinations of: burning time (0 min, 5 min, and 15 min), seed depth (5 cm and 8.5 cm), and presence or absence of ash cover. The design included control samples for null hypothesis testing. During a time span of 20 months after treatments, the maximum number of seedlings observed every 30 day period, their taxonomical identity, the number of destroyed seeds, and the number of non-germinated seeds were analyzed. Six functional species groups, defined by germination response (i.e,. germinated, destroyed, non-germinated), were identified using minimum-variance hierarchical clustering and correspondence analysis. In addition, the influence of the three environmental design factors and three functional species groups based on their general germination response were then analyzed by means of general regression models.  [Read More]

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