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Cardiospermum grandiflorum Sw. and Podranea ricasoliana (Tanfani) Sprague were intro duced after 1930s to be used for arbours and pergolas in gardens sited in warmer locations under 400 metres in south coast of Madeira Island. At the present they become very common and are densely growing over wastelands, stone walls, along stream banks, and over forsaken terraces. The historical expansion of these vines was evaluated using Repeat Landscape Photography Technique (RLPT). These species, which expanded in potential areas of Mayteno umbellatae-Oleo maderensis sigmetum (series of microforest of Madeiran oleaster tree) and Semele androgynae-Apollonio barbujanae sigmetum (series of laurel forest of barbusano-tree), spread into former agricultural lands and areas previously occupied by native vegetation or that could allow its regeneration. Although the evidence of being a threat to native vegetation recovery, no attempt has been made, up till now, to control them.
Info Adicional:
Cardiospermum grandiflorum Sw. and Podranea ricasoliana (Tanfani) Sprague were intro duced after 1930s to be used for arbours and pergolas in gardens sited in warmer locations under 400 metres in south coast of Madeira Island. At the present they become very common and are densely growing over wastelands, stone walls, along stream banks, and over forsaken terraces. The historical expansion of these vines was evaluated using Repeat Landscape Photography Technique (RLPT). These species, which expanded in potential areas of Mayteno umbellatae-Oleo maderensis sigmetum (series of microforest of Madeiran oleaster tree) and Semele androgynae-Apollonio barbujanae sigmetum (series of laurel forest of barbusano-tree), spread into former agricultural lands and areas previously occupied by native vegetation or that could allow its regeneration. Although the evidence of being a threat to native vegetation recovery, no attempt has been made, up till now, to control them.
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