| Title |
Populations of a Connecticut River midge structured by geological history and downstream gene flow
|
|---|---|
| Published in |
Chromosome Research, January 2005
|
| DOI | 10.1007/s10577-005-2358-6 |
| Pubmed ID | |
| Authors |
Sean F. Werle |
| Abstract |
Connecticut River midges in the genus Axarus are constrained to semi-isolated populations associated with submerged clay exposures, and gene flow between populations is restricted. I sampled larval midges from fifteen spatially separated sites in the Connecticut River and determined karyotypes for 3111 larvae in two closely related species. In one of these species, an undescribed species referred to as Axarus species varvestris, 5 chromosomal rearrangements were present as polymorphisms. Four of these are paracentric inversions, and the fifth is a terminal insertion or deletion. I used chromosomal rearrangement frequencies to calculate Nei's genetic distance measures for all pairwise population comparisons and I constructed a neighbor-joining phenetic tree for the populations using these distances. Genetic distance between populations of A. sp. varvestris increases with geographic separation, and tree structure indicates that restricted gene flow only occurs in a downstream direction. The effect of unidirectional (downstream) gene flow on population genetic structure in riverine midges is described here for the first time. A genetic break is apparent between populations associated with 12 000-year-old sediments originating in different ancient lakes. The geological break between lakes also coincides with a break in the species composition of the Axarus populations. |
Mendeley readers
The data shown below were compiled from readership statistics for 13 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Unknown | 13 | 100% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 5 | 38% |
| Other | 2 | 15% |
| Professor > Associate Professor | 2 | 15% |
| Researcher | 2 | 15% |
| Professor | 1 | 8% |
| Other | 1 | 8% |
| Readers by discipline | Count | As % |
|---|---|---|
| Agricultural and Biological Sciences | 8 | 62% |
| Environmental Science | 4 | 31% |
| Earth and Planetary Sciences | 1 | 8% |
Attention Score in Context
This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 07 June 2008.
All research outputs
#7,453,827
of 22,787,797 outputs
Outputs from Chromosome Research
#145
of 507 outputs
Outputs of similar age
#36,000
of 139,639 outputs
Outputs of similar age from Chromosome Research
#3
of 8 outputs
Altmetric has tracked 22,787,797 research outputs across all sources so far. This one is in the 44th percentile – i.e., 44% of other outputs scored the same or lower than it.
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