IMBIV   05474
INSTITUTO MULTIDISCIPLINARIO DE BIOLOGIA VEGETAL
Unidad Ejecutora - UE
artículos
Título:
Altitudinal distribution of native and alien plant species in roadside communities from central Argentina
Autor/es:
PAIARO, V.; CABIDO, M; PUCHETA, E.
Revista:
AUSTRAL ECOLOGY
Editorial:
WILEY-BLACKWELL PUBLISHING, INC
Referencias:
Año: 2011 vol. 36 p. 176 - 184
ISSN:
1442-9985
Resumen:
Abstract Roadsides may homogenize the distribution of native species and act as corridors for the spread of alien
taxa.We examined the variation in native and alien plant species richness and composition at two spatial scales
defined by altitude and habitat type (edges and fill slopes), as well as the relationship between native and exotic
species richness in roadside plant communities in mountains from central Argentina. Following a gradient from
1100 to 2200 m a.s.l. along a mountain road, plant species cover was recorded within sample plots of 30 m ¥ 10 m
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
taxa.We examined the variation in native and alien plant species richness and composition at two spatial scales
defined by altitude and habitat type (edges and fill slopes), as well as the relationship between native and exotic
species richness in roadside plant communities in mountains from central Argentina. Following a gradient from
1100 to 2200 m a.s.l. along a mountain road, plant species cover was recorded within sample plots of 30 m ¥ 10 m
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
taxa.We examined the variation in native and alien plant species richness and composition at two spatial scales
defined by altitude and habitat type (edges and fill slopes), as well as the relationship between native and exotic
species richness in roadside plant communities in mountains from central Argentina. Following a gradient from
1100 to 2200 m a.s.l. along a mountain road, plant species cover was recorded within sample plots of 30 m ¥ 10 m
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
Roadsides may homogenize the distribution of native species and act as corridors for the spread of alien
taxa.We examined the variation in native and alien plant species richness and composition at two spatial scales
defined by altitude and habitat type (edges and fill slopes), as well as the relationship between native and exotic
species richness in roadside plant communities in mountains from central Argentina. Following a gradient from
1100 to 2200 m a.s.l. along a mountain road, plant species cover was recorded within sample plots of 30 m ¥ 10 m
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.
¥ 10 m
systematically located at 100-m altitude intervals on both roadside habitats. Although native species richness
decreased with altitude and composition changed accordingly, the number of alien species peaked at both extremes
of the elevation gradient and did not reflect an altitudinal replacement of chorological groups.The number of both
native and alien species was higher in roadside edges, but a negative association between the richness of native and
alien species occurred only on fill slopes, suggesting that roadside habitats differ in their susceptibility to plant
species colonization and in the mechanisms driving native and alien species richness. Our results highlight the
importance of altitude and roadside habitat as factors controlling plant species richness and composition along
roadside communities in central Argentina. Although altitude acts as a filter for native plants, it apparently did not
constrain the establishment of alien species along the studied roadsides, indicating that the influence of this road
as a plant species corridor may increase with time, promoting the opportunities for aliens to expand their current
distribution.