NDLI: Conservation of Hymenocallis coronaria genetic diversity in the presence of disturbance and a disjunct distribution

Content Provider	Springer Nature Link
Author	Markwith, Scott H. Parker, Kathleen C.
Copyright Year	2006
Abstract	Evidence shows that dam construction has affected faunal species distribution and diversity in the southeastern U.S. However, the effects of this perturbation on aquatic flora of the region are heretofore uninvestigated. The objective for this research is to examine the effects of hydroelectric power generation and habitat characteristics on the size and distribution of populations of Hymenocallis coronaria (J. LeConte) Kunth (Amaryllidaceae), an emergent aquatic plant found in the southeastern United States, and to characterize its genetic variability in an effort to target conservation priorities. Multiple linear and logistic regression analyses show that hydropeaking does not have a significant effect on H. coronaria populations located downstream of dams, while other habitat variables associated with the streams are significantly positively related to population size and distribution. Analysis of 24 populations using seven universal cpDNA markers and six nDNA microsatellite markers indicates that the genetic structure for both genomes correlates with the location of a major gap in the species’ range, showing deep divergences in haplotype and population dendrograms between eastern and western regions. An AMOVA confirms that a substantial amount of genetic variation is found among regions, and very little variation is found within regions. The eastern and western regions have diverged for a significant time period, potentially due to the presence of a gene flow barrier in the middle of the species’ range caused by sub-standard habitat. Individual drainage basins contain unique cpDNA haplotypes and should be managed appropriately.
Starting Page	949
Ending Page	963
Page Count	15
File Format	PDF
ISSN	15660621
Journal	Conservation Genetics
Volume Number	8
Issue Number	4
e-ISSN	15729737
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-12-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Shoals spider-lily Hydropeaking Flow manipulation Allopatry Genetic differentiation Evolutionary Biology Plant Sciences Animal Anatomy / Morphology / Histology Human Genetics
Content Type	Text
Resource Type	Article
Subject	Genetics Ecology, Evolution, Behavior and Systematics

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