Abstract:
:Fragmentation and loss of natural habitats are recognized as major threats to contemporary flora and fauna. Detecting past or current reductions in population size is therefore a major aim in conservation genetics. Statistical methods developed to this purpose have tended to ignore the effects of spatial population structure. However in many species, individual dispersal is restricted in space and fine-scale spatial structure such as isolation by distance (IBD) is commonly observed in continuous populations. Using a simulation-based approach, we investigated how comparative and single-point methods, traditionally used in a Wright-Fisher (WF) population context for detecting population size reduction, behave for IBD populations. We found that a complex 'quartet' of factors was acting that includes restricted dispersal, population size (i.e. habitat size), demographic history, and sampling scale. After habitat reduction, IBD populations were characterized by a stronger inertia in the loss of genetic diversity than WF populations. This inertia increases with the strength of IBD, and decreases when the sampling scale increases. Depending on the method used to detect a population size reduction, a local sampling can be more informative than a sample scaled to habitat size or vice versa. However, IBD structure led in numerous cases to incorrect inferences on population demographic history. The reanalysis of a real microsatellite data set of skink populations from fragmented and intact rainforest habitats confirmed most of our simulation results.
journal_name
Mol Ecoljournal_title
Molecular ecologyauthors
Leblois R,Estoup A,Streiff Rdoi
10.1111/j.1365-294X.2006.03046.xsubject
Has Abstractpub_date
2006-10-01 00:00:00pages
3601-15issue
12eissn
0962-1083issn
1365-294Xpii
MEC3046journal_volume
15pub_type
杂志文章abstract::The lizard genus Kentropyx (Squamata: Teiidae) comprises nine species, which have been placed in three species groups (calcarata group, associated to forests ecosystems; paulensis and striata groups, associated to open ecosystems). We reconstructed phylogenetic relationships of Kentropyx based on morphology (pholidosi...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2008.03999.x
更新日期:2009-01-01 00:00:00
abstract::Introduced species can threaten native taxa in multiple ways, including competition and hybridization, which can reduce fitness, alter ecological niches or swamp native genomes. Encroachment and hybridization by introduced species also provide opportunities to study the dynamics of invasiveness and hybridization durin...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2010.04943.x
更新日期:2011-01-01 00:00:00
abstract::The increasing rate of biological invasions resulting from human transport or human-mediated changes to the environment has had devastating ecological and public health consequences. The kissing bug, Triatoma infestans, has dispersed through the Peruvian city of Arequipa. The biological invasion of this insect has res...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.12471
更新日期:2013-10-01 00:00:00
abstract::The population structure of variation in a nuclear actin intron and the control region of mitochondrial DNA is described for humpback whales from eight regions in the North Pacific Ocean: central California, Baja Peninsula, nearshore Mexico (Bahia Banderas), offshore Mexico (Socorro Island), southeastern Alaska, centr...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.1998.00384.x
更新日期:1998-06-01 00:00:00
abstract::Seagrass meadows are among the most important coastal ecosystems in terms of both spatial extent and ecosystem services, but they are also declining worldwide. Understanding the drivers of seagrass meadow dynamics is essential for designing sound management, conservation and restoration strategies. However, poor knowl...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.15532
更新日期:2020-09-01 00:00:00
abstract::We analysed genetic variation within and between populations of the common ash from Bulgaria in order to extract biological information useful in the context of conservation management of eastern European genetic resources of noble hardwood species. A total of 321 trees from three regions of Bulgaria were typed at six...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.2001.01300.x
更新日期:2001-07-01 00:00:00
abstract::Noninvasive samples are useful for molecular genetic analyses of wild animal populations. However, the low DNA content of such samples makes DNA amplification difficult, and there is the potential for erroneous results when one of two alleles at heterozygous microsatellite loci fails to be amplified. In this study we ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.0962-1083.2001.01308.x
更新日期:2001-07-01 00:00:00
abstract::Knowledge of the role of landscapes in shaping genetic connectivity and divergence is essential for understanding patterns of biogeography and diversity. This is particularly relevant for the Andes region, a major biodiversity hotspot of relatively recent origin. We examined the phylogeography and landscape genetics o...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294x.2008.03853.x
更新日期:2008-08-01 00:00:00
abstract::The population structure of the giant mottled eel, Anguilla marmorata, was investigated with mitochondrial and microsatellite DNA analyses using 449 specimens from 13 localities throughout the species range. Control region F-statistics indicated the North Pacific (Japan, Taiwan, Philippines, Sulawesi), South Pacific (...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2008.03822.x
更新日期:2008-07-01 00:00:00
abstract::We estimated the rate of extra-pair fertilizations (EPFs) in waved albatrosses (Phoebastria irrorata) on Isla Española, Galápagos, Ecuador, using multilocus minisatellite DNA fingerprinting. Waved albatrosses are socially monogamous, long-lived seabirds whose main population is on Española. Aggressive extra-pair copul...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.2000.00996.x
更新日期:2000-09-01 00:00:00
abstract::Understanding divergent adaptation and ecological speciation requires the synthesis of multiple approaches, including phenotypic characterization, genetics and genomics, realistic assessment of fitness and population genetic modelling. Current research in this field often approaches this problem from one of two direct...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13678
更新日期:2017-01-01 00:00:00
abstract::Effects of habitat fragmentation on genetic diversity vary among species. This may be attributed to the interacting effects of species traits and landscape structure. While widely distributed and abundant species are often considered less susceptible to fragmentation, this may be different if they are small sized and ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2010.04877.x
更新日期:2010-11-01 00:00:00
abstract::When studying selection during adaptation to novel environments, researchers have often paid little attention to an organism's earliest developmental stages. Despite this lack of attention, early life history traits may be under strong selection during colonization, as the expression of adaptive phenotypes at later po...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2010.04558.x
更新日期:2010-04-01 00:00:00
abstract::Experimental studies of the interaction between host and symbiont in a maturing symbiotic organ have presented a challenge for most animal-bacterial associations. Advances in the rearing of the host squid Euprymna scolopes have enabled us to explore the relationship between a defect in symbiont light production and la...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.12474
更新日期:2014-03-01 00:00:00
abstract::Landscape genomics promises to provide novel insights into how neutral and adaptive processes shape genome-wide variation within and among populations. However, there has been little emphasis on examining whether individual-based phenotype-genotype relationships derived from approaches such as genome-wide association ...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13473
更新日期:2016-01-01 00:00:00
abstract::A comparative study between microsatellite and allozyme markers was conducted on natural populations of resident brown trout (Salmo trutta) sampled over a reduced geographical scale and on hatchery strains. The higher level of polymorphism observed at microsatellite loci resulted in higher power of statistical tests f...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.1998.00362.x
更新日期:1998-03-01 00:00:00
abstract::Threespine stickleback populations are model systems for studying adaptive evolution and the underlying genetics. In lakes on the Haida Gwaii archipelago (off western Canada), stickleback have undergone a remarkable local radiation and show phenotypic diversity matching that seen throughout the species distribution. T...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.12215
更新日期:2013-04-01 00:00:00
abstract::Climatic conditions and landscape features often strongly affect species' local distribution patterns, dispersal, reproduction and survival and may therefore have considerable impacts on species' fine-scale spatial genetic structure (SGS). In this study, we demonstrate the efficacy of combining fine-scale SGS analyses...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2011.05372.x
更新日期:2012-01-01 00:00:00
abstract::Army ants have long been suspected to represent an independent origin of multiple queen-mating in the social Hymenoptera. Using microsatellite markers, we show that queens of the African army ant Dorylus (Anomma) molestus have the highest absolute (17.3) and effective (17.5) queen-mating frequencies reported so far fo...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2004.02262.x
更新日期:2004-08-01 00:00:00
abstract::The relatedness structure of animal populations is thought to be a critically important factor underlying the evolution of mating systems and social behaviours. While previous work has shown that population structure is shaped by many biological processes, few studies have investigated how these factors vary over time...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.12015
更新日期:2012-11-01 00:00:00
abstract::Red carotenoid colours in birds are widely assumed to be sexually selected quality indicators, but this rests on a very incomplete understanding of genetic mechanisms and honesty-mediating costs. Recent progress was made by the implication of the gene CYP2J19 as an avian carotenoid ketolase, catalysing the synthesis o...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.14451
更新日期:2018-01-01 00:00:00
abstract::Amplified fragment length polymorphisms (AFLPs) were used to characterize the genetic diversity within and among natural populations of Sticherus flabellatus. Eight populations within the Sydney region of New South Wales, Australia were surveyed using 11 primer combinations. A total of 1108 reproducible bands were det...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1046/j.1365-294x.2000.00901.x
更新日期:2000-05-01 00:00:00
abstract::In terrestrial ecosystems, plant species and diverse root-associated fungi form complex networks of host-symbiont associations. Recent studies have revealed that structures of those below-ground plant-fungus networks differ between arbuscular mycorrhizal and ectomycorrhizal symbioses. Nonetheless, we still remain igno...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13680
更新日期:2016-07-01 00:00:00
abstract::In cooperatively breeding species, restricted dispersal of offspring leads to clustering of closely related individuals, increasing the potential both for indirect genetic benefits and inbreeding costs. In apostlebirds (Struthidea cinerea), philopatry by both sexes results in the formation of large (up to 17 birds), p...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2006.03009.x
更新日期:2006-10-01 00:00:00
abstract::In theory, conservation genetics predicts that forest fragmentation will reduce gene dispersal, but in practice, genetic and ecological processes are also dependent on other population characteristics. We used Bayesian genetic analyses to characterize parentage and propagule dispersal in Heliconia acuminata L. C. Rich...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.12495
更新日期:2013-11-01 00:00:00
abstract::Phylogeography of Rice yellow mottle virus (RYMV) was reconstructed from the coat protein gene sequences of a selection of 173 isolates from the 14 countries of mainland Africa where the disease occurred and from the full sequences of 16 representative isolates. Genetic variation was linked to geographical distributio...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02578.x
更新日期:2005-06-01 00:00:00
abstract::Transcontinental migration is a fascinating example of how animals can respond to climatic oscillation. Yet, quantitative data on fitness components are scarce, and the resulting population genetic consequences are poorly understood. Migratory divides, hybrid zones with a transition in migratory behaviour, provide a n...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.13521
更新日期:2016-06-01 00:00:00
abstract::Genomics and bioinformatics have great potential to help address numerous topics in ecology and evolution. Expressed sequence tags (ESTs) can bridge genomics and molecular ecology because they can provide a means of accessing the gene space of almost any organism. We review how ESTs have been used in molecular ecology...
journal_title:Molecular ecology
pub_type: 杂志文章,评审
doi:10.1111/j.1365-294X.2006.03195.x
更新日期:2007-03-01 00:00:00
abstract::The moss Ceratodon purpureus has long been used as a model system in plant development and physiology. However, the molecular population genetics of the species remains virtually unexplored. In this study, we used population genetic analyses of DNA sequence data from three unlinked loci (atpB-rbcL spacer, adk, and phy...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/j.1365-294X.2005.02484.x
更新日期:2005-04-01 00:00:00
abstract::Conservation programmes aim at maximizing the survival probability of populations, by minimizing the loss of genetic diversity, which allows populations to adapt to changes, and controlling inbreeding increases. The best known strategy to achieve these goals is optimizing the contributions of the parents to minimize g...
journal_title:Molecular ecology
pub_type: 杂志文章
doi:10.1111/mec.12560
更新日期:2013-12-01 00:00:00