INVESTIGADORES
ASHWORTH Lorena
artículos
Título:
Reproductive success in fragmented habitats: do compatibility systems and pollination specialization matter?
Autor/es:
AIZEN, M. A.; LORENA ASHWORTH; LEONARDO GALETTO
Revista:
Journal of Vegetation Science
Editorial:
Wiley
Referencias:
Año: 2002 vol. 13 p. 885 - 892
ISSN:
1100-9233
Resumen:
This paper explores whether plant breeding system and
pollination specialization influence the reproductive response of plants to
habitat fragmentation, It is meaningful for conservation to predict a plant
species' extinction risk, We found 25 studies in fue literature assessing fue effects of habitat
fragmentation on either pollination or reproductive success of 46 plant species
to answer the following questions:
1. Are pollination and reproductive success of self-incompatible
species more likely to decline with habitat fragmentatio than the pollination
and reproductive success of
self-compatible species? Although most of the species showed statistically significant
negative effects, the pollination and of
self-incompatible species were as likely to decline with fragmentatlon
as those of self-compatlble species. 2. Are pollination and reproductive success
of specialist plants more affected than the pollination and reproduction of
generallst plants? Comparisons of fragmentation-related changes in pollination
and reproductive success between specialists generalists do not support the hypothesis
that specialization in pollination increases fue risk of plant extinction. 3.
Can self-incompatible species offset their expected higher vulnerability to fragmentation by being, on
average, more pollination
generalist than self-compatible species? In a larger data set on 260
species, we did not find significant differences in either the mean number or
frequency distribution of numbers of flower-visiting
species or orders between self -compatible and self-incompatible species. Our review
suggests that no generalizations can be made on
susceptibility to fragmentation based
on compatibility system and pollination specialization.