東華大學圖書館 |

語系: 繁體中文

說明(常見問題)

回圖書館首頁

手機版館藏查詢

登入

回首頁

切換: 標籤 | MARC模式 | ISBD

Use of Molecular Genetics for the Co...

Hannes, Isabel Porto.

FindBook

Google Book

Amazon

博客來

Use of Molecular Genetics for the Conservation of North American Freshwater Mussels (Bivalvia: Unionidae).

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Use of Molecular Genetics for the Conservation of North American Freshwater Mussels (Bivalvia: Unionidae)./
作者:	Hannes, Isabel Porto.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2018,
面頁冊數:	135 p.
附註:	Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
Contained By:	Dissertation Abstracts International79-08B(E).
標題:	Conservation biology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10744567
ISBN:	9780355679816

Use of Molecular Genetics for the Conservation of North American Freshwater Mussels (Bivalvia: Unionidae).
Hannes, Isabel Porto.

Use of Molecular Genetics for the Conservation of North American Freshwater Mussels (Bivalvia: Unionidae). - Ann Arbor : ProQuest Dissertations & Theses, 2018 - 135 p.

Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.

Thesis (Ph.D.)--State University of New York at Buffalo, 2018.

The use of population genetics at the species and population levels can be a useful tool for the conservation of highly threatened aquatic taxa such as freshwater mussels (Order Unionoida); also known as unionids. Unionids is a highly diverse and ecologically important group. Nevertheless this taxon has experienced among the highest rates of decline and extinction in North America as a result of human impacts such as overharvesting, pollution, impoundment of rivers and the introduction of exotic species (e.g., dreissenid mussels).

ISBN: 9780355679816Subjects--Topical Terms:

535736
Conservation biology.

Use of Molecular Genetics for the Conservation of North American Freshwater Mussels (Bivalvia: Unionidae).
LDR:06564nmm a2200361 4500 001 2201780
005 20190503132004.5
008 201008s2018 ||||||||||||||||| ||eng d
020 $a 9780355679816
035 $a (MiAaPQ)AAI10744567
035 $a (MiAaPQ)buffalo:15582
035 $a AAI10744567
040 $a MiAaPQ $c MiAaPQ
100 1 $a Hannes, Isabel Porto. $0 (orcid)Isabel Porto-Hannes $3 3428508
245 1 0 $a Use of Molecular Genetics for the Conservation of North American Freshwater Mussels (Bivalvia: Unionidae).
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2018
300 $a 135 p.
500 $a Source: Dissertation Abstracts International, Volume: 79-08(E), Section: B.
500 $a Advisers: Howard R. Lasker; Lyuba E. Burlakova.
502 $a Thesis (Ph.D.)--State University of New York at Buffalo, 2018.
520 $a The use of population genetics at the species and population levels can be a useful tool for the conservation of highly threatened aquatic taxa such as freshwater mussels (Order Unionoida); also known as unionids. Unionids is a highly diverse and ecologically important group. Nevertheless this taxon has experienced among the highest rates of decline and extinction in North America as a result of human impacts such as overharvesting, pollution, impoundment of rivers and the introduction of exotic species (e.g., dreissenid mussels).
520 $a Descriptions of freshwater mussel species are based on shell characteristics. However, these features vary geographically and with the environment, which has led to taxonomic confusion and the misidentification of some species. Species delimitation, evolutionary relationships and geographic ranges of many unionid species need to be evaluated.
520 $a Chapter I examines the molecular taxonomic identification of the threatened mussel species Lampsilis bracteata, the Texas Fatmucket, and compares historical and current geographic ranges. Lampsilis bracteata is a regional endemic species from the central Texas biogeographic province and was classified as rare based on its occurrence and low density. The species is listed as state threatened and it is a candidate to be listed as threatened or endangered under the Endangered Species Act of 1973. Based on morphological characters, L. bracteata is recognized as a species; however, due to its shell resemblance to the common species L. hydiana, molecular delineation of these species is necessary. As an endemic species, the geographic range of L. bracteata has been historically restricted; however, due to poor land and water management resulting in habitat loss, this and other freshwater mussel species' distribution ranges and population densities have been drastically reduced. Based on two mitochondrial genes (cytochrome c oxidase subunit 1 gene, COI, and first subunit of the NADH dehydrogenase, ND1), there is support that L. bracteata forms a distinct species.
520 $a Species delineation can also be obscured when reproductive barriers between closely related species are incomplete or breached, allowing gene flow to occur. After the last glaciation, approximately 20--18 kya, glaciers started retreating generating new habitat that species colonized. In North America, the Great Lakes were formed and species' range expansion led to secondary contact between species potentially leading to hybridization. Chapter II examines the molecular phylogenetic relationship of two closely related unionid species, Lampsilis siliquoidea and L. radiata, levels of intermixing (e.g., none, hybridization or introgression) and if occurring, the geographic extent of the hybrid zone. Mitochondrial sequence divergence (COI) and nuclear molecular markers (microsatellites) support that these species form two distinct lineages; nonetheless genetic distances were not large. Furthermore, evidence of admixture between these species was found where their geographic range overlap in the lower Great Lakes, the St. Lawrence River and Lake Champlain basins. The proportion of Lampsilis siliquoidea and L. radiata hybrids varied geographically forming a mosaic of hybrid swarms and purebred populations. Lastly, there is strong population genetic structure within L. siliquoidea that can affect the detection of purebred individuals of this species overestimating the number of hybrids. The geographic range and proportion of hybrids need to be considered when implementing local biodiversity inventories, identifying waterbodies as source of organisms for relocation and restoration projects and when setting appropriate conservation policies.
520 $a Unionids spend most of their lifetime buried in sediments. However, unionids have a unique life history: their larvae; called glochidia, attach to the gills of fish and are then carried until they metamorphose into juveniles when they drop off and burry in the sediment. Dispersal happens mainly during this stage and glochidia can be carried short or long distances depending on the fish host. In lotic systems, landscape features such as barriers (e.g., waterfalls or dams) or connectors (e.g., man-made canals), can affect fish dispersal and consequently affect mussels' dispersal and gene flow. It is of special interest to characterize gene flow patterns in the presence of impassable barriers because they can restrict dispersal and thus isolate populations. On the other hand, connectors such as man-made canals hydrologically link watersheds that would otherwise be isolated, enhancing gene flow and potentially homogenizing populations. Chapter III explores how landscape features affect the population genetic structure and genetic diversity of the freshwater mussel Lampsilis siliquoidea in the southwestern Lake Ontario Watershed. Data from nuclear molecular markers (microsatellites) revealed that waterfalls act as barriers for gene flow between populations within the same river, and that populations above the barrier had lower genetic diversity. Populations above waterfalls can be considered independent conservation units that will need special protection and management measures because they depend on locally produced individuals. Populations that were not hydrologically connected by the Erie Canal were marginally more differentiated than the populations connected by the Erie Canal. (Abstract shortened by ProQuest.).
590 $a School code: 0656.
650 4 $a Conservation biology. $3 535736
650 4 $a Genetics. $3 530508
650 4 $a Evolution & development. $3 3172418
690 $a 0408
690 $a 0369
690 $a 0412
710 2 $a State University of New York at Buffalo. $b Evolution, Ecology and Behavior. $3 3428509
773 0 $t Dissertation Abstracts International $g 79-08B(E).
790 $a 0656
791 $a Ph.D.
792 $a 2018
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10744567