Resum
he flora of this region was exhaustively studied by Dr. Pere
Montserrat between the years 1945 and 1950. Since then, the area has suffered a high increase
in urban occupation compared to its former use as agricultural land, a fact that has favoured the
introduction of a high number of allochthonous flora. In this article, a check-list of the existing al
-
lochthonous flora is presented and its current composition is compared with that observed in 1950.
176 taxa belonging to 54 families are listed, accounting for 13.6% of the total flora studied from
this region. Compositae and Gramineae are the families containing higher numbers of taxa (36 and
23, respectively). Life forms of the allochthonous flora are dominated by therophytes (35.2%) and
hemicryptophytes (21.0%), a trend mirrored in other regions of the Iberian Peninsula. Since 1950,
the number of allochthonous taxa has increased in 75 species, with a mean rate of introduction of
1.29 species per year. Despite the high number of allochthonous species, only 15.9% of them may
be classified as invasive. During the last 58 years, some species with agricultural affinities have
disappeared, whereas the number of exotic species used in gardening has increased considerably.
Regulation by local government is needed in order to better manage this growing problem.
Montserrat between the years 1945 and 1950. Since then, the area has suffered a high increase
in urban occupation compared to its former use as agricultural land, a fact that has favoured the
introduction of a high number of allochthonous flora. In this article, a check-list of the existing al
-
lochthonous flora is presented and its current composition is compared with that observed in 1950.
176 taxa belonging to 54 families are listed, accounting for 13.6% of the total flora studied from
this region. Compositae and Gramineae are the families containing higher numbers of taxa (36 and
23, respectively). Life forms of the allochthonous flora are dominated by therophytes (35.2%) and
hemicryptophytes (21.0%), a trend mirrored in other regions of the Iberian Peninsula. Since 1950,
the number of allochthonous taxa has increased in 75 species, with a mean rate of introduction of
1.29 species per year. Despite the high number of allochthonous species, only 15.9% of them may
be classified as invasive. During the last 58 years, some species with agricultural affinities have
disappeared, whereas the number of exotic species used in gardening has increased considerably.
Regulation by local government is needed in order to better manage this growing problem.
| Títol traduït de la contribució | Alloctonous plants from the Central Section of the Catalan Littoral Range |
|---|---|
| Idioma original | Català |
| Pàgines (de-a) | 89-100 |
| Revista | L'Atzavara |
| Volum | 18 |
| Estat de la publicació | Publicada - 1 de gen. 2009 |