Resumo

GAIAO, Davide et al. The flora biodiversity associated to agrarian ecosystems with cover crops. Rev. de Ciências Agrárias [online]. 2017, vol.40, n.spe, pp.1-10. ISSN 0871-018X.  https://doi.org/10.19084/RCA16175.

Weeds, often seen as a barrier to obtain a high agricultural production, can be part of and contribute to the agricultural ecosystem balance. The aim of the study was to make a flora inventory in natural cover crops of three agricultural ecosystems - olive grove, vineyard and apple orchard - located at Quinta da Alagoa, Ranhados, Viseu. Between 2007 and 2015, from September to December, weeds were monitored using the transect method. In each inventory, the observer moves randomly along a 300 steps transect across the field and records the species present at each step. This study includes the flora inventory, the description of each one and a data analysis by ecosystem and based on biodiversity indexes. This information may help to know and understand the flora biodiversity found in different ecosystems with natural cover crops. A total of 18265 plants were observed belonging to 24 families, 64 genera and 80 taxa. The Asteraceae family showed the greatest diversity of taxa (26,4%). The apple orchard was the ecosystem with higher diversity.

Palavras-chave : flora; biodiversity; ecosystem; proprieties; soil.

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