5 research outputs found
Native drivers of fish life history traits are lost during the invasion process
Rapid adaptation to global change can counter vulnerability of species to population
declines and extinction. Theoretically, under such circumstances both genetic variation and phenotypic plasticity can maintain population fitness, but empirical support
for this is currently limited. Here, we aim to characterize the role of environmental
and genetic diversity, and their prior evolutionary history (via haplogroup profiles)
in shaping patterns of life history traits during biological invasion. Data were derived from both genetic and life history traits including a morphological analysis of 29
native and invasive populations of topmouth gudgeon Pseudorasbora parva coupled with climatic variables from each location. General additive models were constructed
to explain distribution of somatic growth rate (SGR) data across native and invasive
ranges, with model selection performed using Akaike's information criteria. Genetic
and environmental drivers that structured the life history of populations in their native range were less influential in their invasive populations. For some vertebrates at
least, fitness-related trait shifts do not seem to be dependent on the level of genetic
diversity or haplogroup makeup of the initial introduced propagule, nor of the availability of local environmental conditions being similar to those experienced in their
native range. As long as local conditions are not beyond the species physiological
threshold, its local establishment and invasive potential are likely to be determined
by local drivers, such as density-dependent effects linked to resource availability or
to local biotic resistance
Native drivers of fish life history traits are lost during the invasion process
Rapid adaptation to global change can counter vulnerability of species to population
declines and extinction. Theoretically, under such circumstances both genetic variation and phenotypic plasticity can maintain population fitness, but empirical support
for this is currently limited. Here, we aim to characterize the role of environmental
and genetic diversity, and their prior evolutionary history (via haplogroup profiles)
in shaping patterns of life history traits during biological invasion. Data were derived from both genetic and life history traits including a morphological analysis of 29
native and invasive populations of topmouth gudgeon Pseudorasbora parva coupled with climatic variables from each location. General additive models were constructed
to explain distribution of somatic growth rate (SGR) data across native and invasive
ranges, with model selection performed using Akaike's information criteria. Genetic
and environmental drivers that structured the life history of populations in their native range were less influential in their invasive populations. For some vertebrates at
least, fitness-related trait shifts do not seem to be dependent on the level of genetic
diversity or haplogroup makeup of the initial introduced propagule, nor of the availability of local environmental conditions being similar to those experienced in their
native range. As long as local conditions are not beyond the species physiological
threshold, its local establishment and invasive potential are likely to be determined
by local drivers, such as density-dependent effects linked to resource availability or
to local biotic resistance