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Modificazioni e strategie competitive osservate nella flora dell’isola Rossa di Teulada (Sardegna sud occidentale)

Bocchieri, Emanuele - Iiriti, Gianluca (2000) Modificazioni e strategie competitive osservate nella flora dell’isola Rossa di Teulada (Sardegna sud occidentale). Rendiconti del Seminario della Facoltà di Scienze dell'Università di Cagliari, 70 (Supple). pp. 294-332. ISSN 0370727X

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Abstract

The authors report on the results of their survey on the Isola Rossa near Teulada (South-western Sardinia). The flora found on the island, which consisted of 206 entities, grouped in 59 families and distributed in 157 genera, differs notably from the flora surveyed 50 years ago. In particular, 81 new species have been found, while 44 species listed in the earlier survey have not been confirmed. Comparison of typically mediterranean biological spectra showed an increase in terophytes and a sharp decrease in hemicriptophytes. The application of Grime’s triangular system to this survey and the earlier one showed that floral changes are characterised by a decrease in stress-resistant species and an increase in ruderal species. The vegetation cover has also undergone major changes. The colonising capacity of Brassica insularis is particularly interesting in this regard: this plant, which was previously found only on the northern side of the island, is now scattered throughout the island. All these changes have also been confirmed by the turnover ratio, which is in excess of 60%, and highlights the occurrence of deep environmental changes.

Item Type:Article
Publisher:Università degli Studi di Cagliari
Date:2000
Institution:Universita' degli Studi di Cagliari
Divisions:Centri > Seminario Scientifico della Facolta' di Scienze MM.FF.NN.
Subjects:Area 05 - Scienze biologiche > BIO/03 Botanica ambientale e applicata
Uncontrolled Keywords:Spettri biologici, terofite, emicriptofite, Brassica insularis, Sardegna, Teulada, Isola Rossa, biological spectra, terophytes, hemicriptophytes, Sardinia
ID Code:774
Deposited On:19 Apr 2012 12:06

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