Predispersal seed predation and population dynamics in the perennial understorey herb Actaea spicata
作者： Heléne Fröborg , Ove Eriksson
DOI: 10.1139/B03-099
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摘要: Predispersal seed predation by a moth larva, Eupithecia immundata Leinig & Zeller (Geometridae), and its impact on population dynamics of the perennial herb Actaea spicata L. were studied during 7 years in deciduous mixed coniferous forest populations southeastern Sweden. Twelve matrix models constructed based transition probabilities among six stage classes populations. The fraction seeds consumed varied between 21% 80% but was not significantly correlated with production. Experimental addition compensating for losses caused predator resulted increased seedling emergence one Population growth rate positive (λ > 1) 1 6 2 population. Survival reproductive individuals contributed most strongly to λ both In some years, projected changed from negative values because loss c...
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