Natural regeneration and gender-specific spatial pattern of Taxus baccata in an old-growth population in Foresta Umbra (Italy)

• Autorzy: Vessella F. , Salis A. , Scire M. , Piovesan G. , Schirone B.
• Języki publikacji: EN

Abstrakty

EN

English yew is rare and endangered dioecious species. Research on regeneration processes of endangered taxa is important to understand the mechanisms allowing a species to survive under several ecological scenarios, to predict future distribution shifts, to achieve best management practices and conservation policies. Our investigation was focusing on one of the oldest yew population in Europe, in Foresta Umbra in Italy. The main aim of this study was to understand spatial regeneration processes and dynamics related with parent trees’ sex distribution. Geostatistical analysis showed that seedlings occur in patches avoiding direct competition with adult yews. Negative relationship between regeneration and yew density and basal area was found. A general model for the reproductive ecology is proposed: females are less competitive and more environmentally demanding than males, because of their reproductive effort. Indeed, male and female fitness responds differently across environmental gradients, thus favouring spatial segregation of seedlings. Understanding the yew’s adaptive effectiveness is essential to ensure the conservation of existing populations, and encourage the species’ resilience into areas where yew is endangered.

Słowa kluczowe

EN

Mediterranean environment; natural regeneration; regeneration dynamics; Taxus baccata; English yew; rare species; dioecious species; endangered species; Italy

• Wydawca: -
• Czasopismo: Dendrobiology
• Rocznik: 2015
• Tom: 73
• Opis fizyczny: p.75-90,fig.,ref.

Twórcy

autor

Vessella F.

autor

Salis A.

autor

Scire M.

autor

Piovesan G.

autor

Schirone B.

• Dipartimento di Scienze e Tecnologie per l'Agricoltura, le Foreste, la Natura e l'Energia (DAFNE), Universita degli Studi della Tuscia, Via S.Camillo de Lellis, 01100 Viterbo, Italy

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Identyfikatory

DOI

10.12657/denbio.073.008