Comparative Genetic Diversity, Population Structure, and Adaptations of Walleye and Yellow Perch Across North America

There are increasing concerns regarding bat mortality at wind energy facilities, especially as installed capacity continues to grow. In North America, wind energy development has recently expanded into the Lower Rio Grande Valley in south Texas where bat species had not previously been exposed to wind turbines. Our study sought to characterize genetic diversity, population structure, and effective population size in Dasypterus ega and D. intermedius, two tree-roosting yellow bats native to this region and for which little is known about their population biology and seasonal movements. There was no evidence of population substructure in either species. Genetic diversity at mitochondrial and microsatellite loci was lower in these yellow bat taxa than in previously studied migratory tree bat species in North America, which may be due to the non-migratory nature of these species at our study site, the fact that our study site is located at a geographic range end for both taxa, and possibly weak ascertainment bias at microsatellite loci. Historical effective population size (NEF) was large for both species, while current estimates of Ne had upper 95% confidence limits that encompassed infinity. We found evidence of strong mitochondrial differentiation between the two putative subspecies of D. intermedius (D. i. floridanus and D. i. intermedius) which are sympatric in this region of Texas, yet little differentiation using microsatellite loci. We suggest this pattern is due to secondary contact and hybridization and possibly incomplete lineage sorting at microsatellite loci. We also found evidence of some hybridization between D. ega and D. intermedius in this region of Texas. We recommend that our data serve as a starting point for the long-term genetic monitoring of these species in order to better understand the impacts of wind-related mortality on these populations over time.

Download Full-text

Origin, genetic diversity, and population structure of Nectria coccinea var. faginata in North America

Mycologia ◽

10.1080/00275514.1999.12061056 ◽

1999 ◽

Vol 91 (4) ◽

pp. 583-592 ◽

Cited By ~ 4

Author(s):

Eileen M. Mahoney ◽

Michael G. Milgroom ◽

Wayne A. Sinclair ◽

David R. Houston

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

North America

Download Full-text

Genetic diversity of the lichen-forming alga, Diplosphaera chodatii, in North America and Europe

The Lichenologist ◽

10.1017/s0024282913000510 ◽

2013 ◽

Vol 45 (6) ◽

pp. 799-813 ◽

Cited By ~ 7

Author(s):

Kyle M. FONTAINE ◽

Elfie STOCKER-WÖRGÖTTER ◽

Tom BOOTH ◽

Michele D. PIERCEY-NORMORE

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

Gene Flow ◽

North America ◽

Isolation By Distance ◽

Water Level Fluctuations ◽

Free Living ◽

Climatic Zones ◽

Algal Symbiont ◽

Low Levels

AbstractDermatocarpon luridum is a subaquatic lichen which is distributed within temperate climatic zones around the world. It colonizes rock substrata along the shoreline of lakes and rivers of watersheds that regularly experience water level fluctuations. The mycobiont produces perithecia with small, simple spores that are thought to be wind dispersed. The photobiont, Diplosphaera chodatii, occurs both free-living and lichenized but little is known about its distribution and dispersal. The goal of this study was to compare the population structure of the photobiont from lakes and rivers in central North America with those of Europe. Specimens were collected in Manitoba, Canada and Austria. Population structure of the algal symbiont was assessed using the internal transcribed spacer (ITS) of ribosomal DNA (rDNA) and actin gene sequences. Results showed that genetic diversity and gene flow was high within local populations, but gene flow was low between continental populations. Low levels of gene flow between the most distant populations support the isolation-by-distance theory. The photobiont on both continents is also reported to be the photobiont for other lichen species contributing to photobiont availability for D. luridum.

Download Full-text

Old Meets New: Combining Herbarium Databases with Genetic Methods to Evaluate the Invasion Status of Baby’s Breath (Gypsophila paniculata) in North America

10.1101/686691 ◽

2019 ◽

Cited By ~ 2

Author(s):

Sarah K. Lamar ◽

Charlyn G. Partridge

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

North America ◽

North Dakota ◽

Early Period ◽

Geographic Area ◽

Gypsophila Paniculata ◽

Sampling Locations ◽

Herbarium Data ◽

Herbarium Collections

AbstractAimThis paper aims to inform our knowledge of common baby’s breath’s (Gypsophila paniculata) current population structure and invasion status using a combination of contemporary genetic methods and historical herbarium data.TaxonGypsophila paniculata (Angiosperms: Eudicot, Caryophyllaceae)LocationSamples were collected from seven locations spanning a portion of the plant’s North American range: Washington, North Dakota, Minnesota, and Michigan, United States.MethodsTo analyze contemporary population structure, individuals of G. paniculata from 7 distinct sampling locations were collected and genotyped at 14 microsatellite loci. Population structure was inferred using both Bayesian and multivariate methods. To investigate G. paniculata’s invasion status, public herbarium databases were searched for mention of the species. Records were combined, resulting in a database of 307 herbarium collections dating from the late 1800’s to current day. Using this database, invasion curves were created at different geospatial scales.ResultsResults of genetic analyses suggest the presence of at least two genetic clusters spanning our seven sampling locations. Sampling locations in Washington, North Dakota, Minnesota, and northwestern Michigan form one genetic cluster, distinct from our two more southern sampling locations in Michigan, which form a second cluster with increased relative genetic diversity. Invasion curves created for these two clusters show different time periods of invasion. An invasion curve created for North America suggests G. paniculata’s range may still be expanding.Main conclusionsGypsophila paniculata has likely undergone at least two distinct invasions in North America, and its range may still be expanding. Restricted genetic diversity seen across a wide geographic area could be a signature of limited seed distributors present during the early period of this garden ornamental’s invasion.

Download Full-text

Low Genetic Diversity Suggests the Recent Introduction of Dogwood Powdery Mildew to North America

Plant Disease ◽

10.1094/pdis-01-19-0051-re ◽

2019 ◽

Vol 103 (11) ◽

pp. 2903-2912

Author(s):

Christopher R. Wyman ◽

Denita Hadziabdic ◽

Sarah L. Boggess ◽

Timothy A. Rinehart ◽

Alan S. Windham ◽

...

Keyword(s):

Genetic Diversity ◽

Population Structure ◽

North America ◽

Powdery Mildew ◽

The United States ◽

Data Sets ◽

Flowering Dogwood ◽

Low Genetic Diversity ◽

Length Data ◽

Exotic Pathogen

Cornus florida (flowering dogwood) is a popular understory tree endemic to the eastern hardwood forests of the United States. In 1996, dogwood powdery mildew caused by Erysiphe pulchra, an obligate biotrophic fungus of large bracted dogwoods, reached epidemic levels throughout the C. florida growing region. In the late 1990s, both sexual and asexual stages of E. pulchra were regularly observed; thereafter, the sexual stage was found less frequently. We examined the genetic diversity and population structure of 167 E. pulchra samples on C. florida leaves using 15 microsatellite loci. Samples were organized into two separate collection zone data sets, separated as eight zones and two zones, for the subsequent analysis of microsatellite allele length data. Clone correction analysis reduced the sample size to 90 multilocus haplotypes. Our study indicated low genetic diversity, a lack of definitive population structure, low genetic distance among multilocus haplotypes, and significant linkage disequilibrium among zones. Evidence of a population bottleneck was also detected. The results of our study indicated a high probability that E. pulchra reproduces predominately via asexual conidia and lend support to the hypothesis that E. pulchra is an exotic pathogen to North America.[Formula: see text] Copyright © 2019 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .

Download Full-text