NDLI: Microevolutionary processes in Chesapeake Bay (Virginia, USA) eelgrass, Zostera marina L

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Microevolutionary processes in Chesapeake Bay (Virginia, USA) eelgrass, Zostera marina L

Content Provider	Semantic Scholar
Author	Rhode, Jennifer M.
Copyright Year	2002
Abstract	A population’s genetic structure and diversity can reveal the demographic and selective forces to which it has been exposed and influence that population’s response to environmental changes. Genetic structure can also help explain differences among populations in individual morphology or fitness. Beds of eelgrass (Zostera marina L) in Chesapeake Bay (Virginia, USA) are marked by significant variation in shoot density and morphology. They have also experienced substantial reductions in recent decades, and these might have important implications for genetic structure and connectivity among beds. Chesapeake eelgrass beds are marked by significant variation in shoot density and morphology. Following a previous allozyme survey that revealed substantial geographically-partitioned genetic variation, this study examined morphological and genetic (allozyme) structure and diversity within and among eelgrass beds of different ages (> 65 years and < 6 years) and sizes (> 100 ha and <10 ha) to investigate the influence of known population history on genetic structure of this clonal plant. While there was strong and significant morphological variation among individual beds, no morphological measure varied consistently among the three bed types (old and large, old and small, young and small). Similarly, despite strong genetic differentiation among beds ( F s t = 0.198), much genetic diversity was found within beds, and the amount of diversity differed little by bed age or size. Beds showed significant levels of inbreeding
File Format	PDF HTM / HTML
DOI	10.25773/v5-pbz7-xx29
Alternate Webpage(s)	https://scholarworks.wm.edu/cgi/viewcontent.cgi?article=2391&context=etd
Alternate Webpage(s)	https://doi.org/10.25773/v5-pbz7-xx29
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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