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Recent Efforts to Recover Armeria berlengensis, an Endemic Species from Berlengas Archipelago, Portugal
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Resumo(s)
Berlengas archipelago is a UNESCO world heritage site and the only location where Armeria
berlengensis is found. This species faces various threats, namely, human disturbance, the presence of
Carpobrotus edulis, yellow-legged gull, common-rabbit, and black-rat populations. Thus, exclusion
areas were installed, which blocked the access of most Gulls, aiming to promote the recovery of
A. berlengensis. Additionally, rabbits and rats were removed from the island. After six years of
surveys, there has been an increase in the number of individuals of A. berlengensis in the exclusion
areas, and a clear shift in the size structure of the A. berlengensis population. Significant changes in the
height and diameter of the individuals were also noted. These findings indicate that the population of
A. berlengensis is changing and becoming a healthier population. Principal component analysis results
show a straightforward dissimilarity between the areas with A. berlengensis and those without the
species and allowed the clustering of two groups: the rupicolous species and the nitrophilous species.
A. berlengensis produces few seeds (seed set 3.4%), which raises concern regarding the long-term
survival of the species. Thus, further conservation efforts must be implemented, such as the control
of invasive species, gulls, and ruderals, to allow for the recovery of A. berlengensis.
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Palavras-chave
Conservation Endangered species Flora Island Rupicolous species Threats