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Publicação
Utilização e impacto dos cervídeos na vegetação lenhosa
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Orientador(es)
Resumo(s)
Roe deer (Capreolus capreolus L.) and Red deer (Cervus elaphus L.) coexist in
Northeastern Portugal. This work aims to increase the knowledge on the effects of these two
species on Mediterranean lignified plants, in particular on shrub like vegetation. To
understand these effects we studied the diet of both deer species during two consecutive
years.
Red deer eat more grasses during Spring, contrasting with Summer, when 80% of the
diet was shrubs and broadleaved trees. Roe deer consumed more shrubs and trees, throughout
the year and had a more diversified diet than Red deer.
Other important effect of deer is by tree rubbing, which occurs mainly during the rut
season. Red deer marked trees preferably along edges of forest plantations whereas Roe Deer
showed a preference for inner and smaller trees inside forest plantations.
We used simulated browsing to understand how Holm oak responds to deer attacks, as
well as two mediterranean shrub species Gum cistus (Cistus ladanifer) and Pterospartum
tridentatum. P. tridentatum responsed with an increase of biomass and in the root system
diameter. Holm oak responded with an increase at crown level and Gum cistus reduced
biomass when browsed treatment was applied. Seed regeneration was also studied on Holm
oak, using deer exclosures. Seedling survival was higher inside exclosures after 3 years.
Descrição
Doutoramento em Engenharia Florestal - Instituto Superior de Agronomia
Palavras-chave
ungulates roe deer red deer diet composition browsing tree rubbing holm oak
Contexto Educativo
Citação
Cortez, José Paulo Mendes Guerra Marques - Utilização e impacto dos cervídeos na vegetação lenhosa. Lisboa, ISA, 2010