Abstract：
:Studies that span entire species ranges can provide insight into the relative roles of historical contingency and contemporary factors that influence population structure and can reveal patterns of genetic variation that might otherwise go undetected. American shad is a wide ranging anadromous clupeid fish that exhibits variation in demographic histories and reproductive strategies (both semelparity and iteroparity) and provides a unique perspective on the evolutionary processes that govern the genetic architecture of anadromous fishes. Using 13 microsatellite loci, we examined the magnitude and spatial distribution of genetic variation among 33 populations across the species' range to (i) determine whether signals of historical demography persist among contemporary populations and (ii) assess the effect of different reproductive strategies on population structure. Patterns of genetic diversity and differentiation among populations varied widely and reflect the differential influences of historical demography, microevolutionary processes and anthropogenic factors across the species' range. Sequential reductions of diversity with latitude among formerly glaciated rivers are consistent with stepwise postglacial colonization and successive population founder events. Weak differentiation among U.S. iteroparous populations may be a consequence of human-mediated gene flow, while weak differentiation among semelparous populations probably reflects natural gene flow. Evidence for an effect of reproductive strategy on population structure suggests an important role for environmental variation and suggests that the factors that are responsible for shaping American shad life history patterns may also influence population genetic structure.
journal_name
Mol Ecoljournal_title
Molecular ecologyauthors
Hasselman DJ,Ricard D,Bentzen Pdoi
10.1111/mec.12197subject
Has Abstractpub_date
2013-03-01 00:00:00pages
1558-73issue
6eissn
0962-1083issn
1365-294Xjournal_volume
22pub_type
杂志文章abstract：:There is a long tradition of artificially stocking lakes and rivers with fish in the hope to increase the quality and amount of fish that can be harvested. The animals used for stocking often originate in distant hatcheries or hatcheries that breed fish from remote regions. This stocking practice could have effects on...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1046/j.1365-294x.2002.01498.x
更新日期：2002-06-01 00:00:00
abstract：:Biological invasions usually start with a small number of founder individuals. These founders are likely to represent a small fraction of the total genetic diversity found in the source population. Our study set out to trace genetically the geographical origin of the horse-chestnut leafminer, Cameraria ohridella, an i...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2009.04290.x
更新日期：2009-08-01 00:00:00
abstract：:An isolated population of dark-eyed juncos, Junco hyemalis, became established on the campus of the University of California at San Diego (UCSD), probably in the early 1980s. It now numbers about 70 breeding pairs. Populations across the entire natural range of the subspecies J. h. thurberi are weakly differentiated f...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1046/j.1365-294x.2004.02104.x
更新日期：2004-03-01 00:00:00
abstract：:A considerable fraction of the world's biodiversity is of recent evolutionary origin and has evolved as a by-product of, and is maintained by, divergent adaptation in heterogeneous environments. Conservationists have paid attention to genetic homogenization caused by human-induced translocations (e.g. biological invas...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2007.03529.x
更新日期：2008-01-01 00:00:00
abstract：:Analysis of mitochondrial (mt)DNA size polymorphism in the form of variable number tandem repeats (mtVNTRs) has become an increasingly popular methodology for addressing questions in molecular ecology. When detected by PCR, mtVNTR analysis can provide a sensitive, rapid, and cost-effective measure of genetic variabili...
journal_title：Molecular ecology
pub_type： 杂志文章,评审
doi：10.1046/j.1365-294x.1998.00495.x
更新日期：1998-11-01 00:00:00
abstract：:To understand the success of invasive species, it is important to know whether colonization events are facilitated by adaptive evolution or are limited to sites where a species is pre-adapted to thrive. Studies of the ancient colonization patterns of an invader in its native range provide an opportunity to examine its...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2007.03508.x
更新日期：2007-10-01 00:00:00
abstract：:The capercaillie inhabits a continuous range in large parts of the Palearctic boreal forest, but is patchily distributed in temperate Europe. An ongoing population decline, largely related to human land use changes, has been most pronounced in central and western Europe, where some local populations have become extinc...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1046/j.1365-294x.2003.01873.x
更新日期：2003-07-01 00:00:00
abstract：:Rivers and lake systems in the southern cone of South America have been widely influenced by historical glaciations, carrying important implications for the evolution of aquatic organisms, including prompting transitions between marine and freshwater habitats and by triggering hybridization among incipient species via...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.15350
更新日期：2020-02-01 00:00:00
abstract：:In vertebrates, the genes of the major histocompatibility complex (MHC) are among the most debated candidates accounting for co-evolutionary processes of host-parasite interaction at the molecular level. The exceptionally high allelic polymorphism found in MHC loci is believed to be maintained by pathogen-driven selec...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2005.02557.x
更新日期：2005-06-01 00:00:00
abstract：:Gene flow within and between social groups is contingent on behaviourally mediated patterns of mating and dispersal. To understand how these patterns affect the genetic structure of primate populations, long-term data are required. In this study, we analyse 10 years of demographic and genetic data from a wild lemur po...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1046/j.1365-294x.2003.01909.x
更新日期：2003-09-01 00:00:00
abstract：:We studied the population genetic structure of 360 and 1247 adult Schistosoma mansoni using seven microsatellite and seven random amplified polymorphic DNA (RAPD) markers, respectively. Parasites were collected from their natural definitive host Rattus rattus in Guadeloupe (West Indies). We found a sex-specific geneti...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1046/j.1365-294x.2002.01518.x
更新日期：2002-07-01 00:00:00
abstract：:Species are impacted by climate change at both ecological and evolutionary time scales. Studies in northern continents have provided abundant evidence of dramatic shifts in distributions of species subsequent to the last glacial maximum (LGM), particularly at high latitudes. However, little is known about the history ...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2010.04734.x
更新日期：2010-08-01 00:00:00
abstract：:In a broad survey of Drosophila melanogaster population samples, levels of abdominal pigmentation were found to be highly variable and geographically differentiated. A strong positive correlation was found between dark pigmentation and high altitude, suggesting adaptation to specific environments. DNA sequence polymor...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2007.03324.x
更新日期：2007-07-01 00:00:00
abstract：:Spawning success of Atlantic salmon (Salmo salar L.) was investigated, under near-natural conditions, in the Girnock Burn, an 8-km long tributary of the River Dee in Scotland. Employing minisatellite-based DNA profiling, mating outcomes were resolved over three spawning seasons by assigning parentage to progeny sample...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1046/j.1365-294x.2001.01254.x
更新日期：2001-04-01 00:00:00
abstract：:Parents can have profound effects on offspring fitness. Little, however, is known about the mechanisms through which parental genetic variation influences offspring physiology in natural systems. White-throated sparrows (Zonotrichia albicollis, WTSP) exist in two genetic morphs, tan and white, controlled by a large po...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.15205
更新日期：2019-09-01 00:00:00
abstract：:African cichlid fishes are a prime model for studying speciation mechanisms. Despite the development of extensive genomic resources, it has been difficult to determine which sources of genetic variation are responsible for cichlid phenotypic variation. One of their most variable phenotypes is visual sensitivity, with ...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.15685
更新日期：2020-12-01 00:00:00
abstract：:For most species in the Western Palaearctic region, southern Mediterranean peninsulas have been identified as major Quaternary refugia and hotspots of intraspecific diversity, and thus, as areas of particular relevance for the conservation of the evolutionary potential. We analysed the patterns of geographical variati...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2008.03870.x
更新日期：2008-09-01 00:00:00
abstract：:The confounding effects of population structure complicate efforts to identify regions of the genome under the influence of selection in natural populations. Here we test for evidence of selection in three genes involved in vertebrate immune function - the major histocompatibility complex (MHC), interferon gamma (IFNG...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2006.02829.x
更新日期：2006-03-01 00:00:00
abstract：:Understanding how immune genetic variation is shaped by selective and neutral processes in wild populations is of prime importance in both evolutionary biology and epidemiology. The European roe deer (Capreolus capreolus) has considerably expanded its distribution range these last decades, notably by colonizing agricu...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.13292
更新日期：2015-08-01 00:00:00
abstract：:Classification, phylogeography and the testing of evolutionary hypotheses rely on correct estimation of species phylogeny. Early molecular phylogenies often relied on mtDNA alone, which acts as a single linkage group with one history. Over the last decade, the use of multiple nuclear sequences has often revealed confl...
journal_title：Molecular ecology
pub_type： 杂志文章,评审
doi：10.1111/mec.14096
更新日期：2017-06-01 00:00:00
abstract：:Philopatry and dispersal result in selection of habitat locations that may differ in resources and social environment and thus should influence fitness components like survival and reproduction. We examined short-distance movements of young and adult females from natal or previous nesting sites within a colony of Colu...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2011.05219.x
更新日期：2012-02-01 00:00:00
abstract：:Distinguishing between primary and secondary intergradation among differentiated populations, and the relative importance of drift and selection, are persistent problems in evolutionary biology. An historical perspective on population interactions can provide insight into the nature of contacts, and thus help resolve ...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：
更新日期：1996-04-01 00:00:00
abstract：:The whitefly Bemisia tabaci (Hemiptera: Aleyrodidae) is a worldwide pest and a vector of numerous plant viruses. B. tabaci is composed of dozens of morphologically indistinguishable biotypes and its taxonomic status is still controversial. This phloem-feeder harbours the primary symbiont Portiera aleyrodidarum and pot...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2011.05087.x
更新日期：2011-05-01 00:00:00
abstract：:The populations of the bivalve clam Macoma balthica in the low-salinity Northern Baltic Sea represent an admixture of two strongly diverged genomic origins, the Pacific Macoma balthica balthica (approx. 60% genomic contribution) and Atlantic Macoma balthica rubra (40%). Using allozyme and mtDNA characters, we describe...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2007.03688.x
更新日期：2008-03-01 00:00:00
abstract：:Increasing genetic diversity and maintaining evolutionary processes are primary goals of conservation translocations, which involve the intentional movement of an at-risk species to establish new populations or augment existing populations, with the ultimate goal of reversing declines. Much debate has focused on how t...
journal_title：Molecular ecology
pub_type： 评论,杂志文章
doi：10.1111/mec.15658
更新日期：2020-11-01 00:00:00
abstract：:Although the importance of host plant chemistry in plant-insect interactions is widely accepted, the genetic basis of adaptation to host plants is not well understood. Here, we investigate transcriptional changes associated with a host plant shift in Drosophila mettleri. While D. mettleri is distributed mainly through...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.13388
更新日期：2015-10-01 00:00:00
abstract：:Pollen DNA metabarcoding-marker-based genetic identification of potentially mixed-species pollen samples-has applications across a variety of fields. While basic species-level pollen identification using standard DNA barcode markers is established, the extent to which metabarcoding (a) correctly assigns species identi...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.14840
更新日期：2019-01-01 00:00:00
abstract：:A number of evolutionary mechanisms have been suggested for generating low but significant genetic structuring among marine fish populations. We used nine microsatellite loci and recently developed methods in landscape genetics and coalescence-based estimation of historical gene flow and effective population sizes to ...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2007.03367.x
更新日期：2007-08-01 00:00:00
abstract：:As a result of an intense host-parasite evolutionary arms race, parasitic wasps frequently display high levels of specialization on very few host species. For instance, in braconid wasps very few generalist species have been described. However, within this family, Cotesia sesamiae is a generalist species that is wides...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/j.1365-294X.2010.04977.x
更新日期：2011-03-01 00:00:00
abstract：:Insect guts are often colonized by multispecies microbial communities that play integral roles in nutrition, digestion and defence. Community composition can differ across host species with increasing dietary and genetic divergence, yet gut microbiota can also vary between conspecific hosts and across an individual's ...
journal_title：Molecular ecology
pub_type： 杂志文章
doi：10.1111/mec.12607
更新日期：2014-03-01 00:00:00
