INVESTIGADORES
GALETTO Leonardo
artículos
Título:
Effects of forest fragmentation on male and female reproductive success in Cestrum parqui (Solanaceae).
Autor/es:
RAMIRO AGUILAR,; LEONARDO GALETTO,
Revista:
OECOLOGIA
Editorial:
SPRINGER
Referencias:
Año: 2004 vol. 138 p. 513 - 520
ISSN:
0029-8549
Resumen:
In this paper we evaluate the effects of forest
fragmentation on male (pollen removal, pollen load, and
pollen tubes) and female reproductive success (fruit- and
seed-set) of Cestrum parqui, a self-incompatible, pollination-
specialist plant species. We also measure focal
individual conspecific density to account for possible
density-related effects that could influence the response
variables. We calculate an index which incorporates male
and female fitness and gives an integrated assessment of
overall reproductive success. Forest fragmentation
strongly affected the amount of pollen grains on stigmas
and number of pollen tubes as well as seed-set, decreasing
from continuous forest to small forest fragments, whereas
focal individual conspecific density failed to explain any
of the variability for the studied variables. Declines in
overall reproductive success (i.e. male and female) in
small forest fragments are ascribed to decreases in both the
quality and quantity of pollination. Self-incompatibility
coupled with a specialist pollination system may be
particularly important traits determining the negative
fragmentation effects observed in C. parqui. Logarithmic
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
specialist plant species. We also measure focal
individual conspecific density to account for possible
density-related effects that could influence the response
variables. We calculate an index which incorporates male
and female fitness and gives an integrated assessment of
overall reproductive success. Forest fragmentation
strongly affected the amount of pollen grains on stigmas
and number of pollen tubes as well as seed-set, decreasing
from continuous forest to small forest fragments, whereas
focal individual conspecific density failed to explain any
of the variability for the studied variables. Declines in
overall reproductive success (i.e. male and female) in
small forest fragments are ascribed to decreases in both the
quality and quantity of pollination. Self-incompatibility
coupled with a specialist pollination system may be
particularly important traits determining the negative
fragmentation effects observed in C. parqui. Logarithmic
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
Cestrum parqui, a self-incompatible, pollination-
specialist plant species. We also measure focal
individual conspecific density to account for possible
density-related effects that could influence the response
variables. We calculate an index which incorporates male
and female fitness and gives an integrated assessment of
overall reproductive success. Forest fragmentation
strongly affected the amount of pollen grains on stigmas
and number of pollen tubes as well as seed-set, decreasing
from continuous forest to small forest fragments, whereas
focal individual conspecific density failed to explain any
of the variability for the studied variables. Declines in
overall reproductive success (i.e. male and female) in
small forest fragments are ascribed to decreases in both the
quality and quantity of pollination. Self-incompatibility
coupled with a specialist pollination system may be
particularly important traits determining the negative
fragmentation effects observed in C. parqui. Logarithmic
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
C. parqui. Logarithmic
regression models described the behaviour of the variables
along the fragmentation size gradient, allowing us to
detect a threshold below which the effects of fragmentation
begin to negatively affect reproductive success in C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
C.
parqui. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
. Our results emphasize the importance of evaluating
both components of the total plant fitness, as well as
including simultaneously several aspects of pollination
and reproduction processes when assessing the effects of
forest fragmentation on plant reproductive success.
