0000000001096326

AUTHOR

L. Mossa

Floristic, phenological and chorological differences in the annual vegetation of Sardinia.

The therophytic flora of Sardinia has been split into four main groups, basing on the ecologic requirements of species. The following groups have been recognized: flora of dry entisoils, flora of periodically swampy or submerged entisoils, flora of coastal sites, flora of fields, road edges and human settlements. Either, most frequent or exclusive species were ascribed to each group. A species was considered “exclusive” when its relative frequency outside a given group was estimated ≤10%. Differences have been highlighted within the groups, dealing with chorology, growth form, flowering time, colour of flowers, pollination and seed dispersal strategies.

research product

Contribution to the knowledge of the therophytic flora of Sardinia

The abundance of therophytes, largely contributes to the naturalistic value of Sardinia. Moreover, most of the annual species belonging to the Sardinian flora have an historical and cultural value, as they followed the men in his migrations and still reflect the different ways of traditional land exploitation characterising the island. As a matter of fact, the development of human technology increased number and frequency of the annual plants of Sardinia. Nowadays, annuals occur in several habitats of the island, where they play a primary ecological role, both as biomass producers and protecting the soil from rill erosion during the rainy season, at least where the environmental factors do …

research product

Plant-ant interaction in xerophilous ephemeral vegetation of S.E. Sardinia.

Frequency and abundance of annual plants have been measured in 40 square plots, 0.36 m2 each, settled in an area of approximately 5 ha at the foothill of the Sarrabus massif, in S.E. Sardinia. 20 plots were randomly distributed at less than 5 m from the ant nests, further 20 at more than 30 m from the ants nests. The results showed a significantly lower plant density next to the ant nests, together with an higher species richness. Far from the nests, plots resulted dominated by relatively few species with a patchy distribution, while next to the nests the distribution of frequencies resulted more homogeneous. It is suggested that harvesting ants may contribute to the small-scale regulation …

research product

La componente terofitica della flora della Sardegna. Forme di crescita, ecologia, corologia e sinsistematica

Nel quadro di una ricerca finalizzata all’incremento delle conoscenze sulla flora e vegetazione terofitica della Sardegna, viene presentata una check-list aggiornata delle specie annuali presenti sull’isola, frutto dell’integrazione di dati bibliografici con indagini condotte sul campo. Il presente lavoro è stato realizzato con l’intento di aggiornare le informazioni relative a corologia, forme di crescita, strategie di disseminazione, periodo di fioritura, colorazioni antesiche, habitat preferenziali e rarità delle specie terofitiche finora segnalate per la Sardegna.

research product