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Phylogeography of Andean frogs.

The University of Western Ontario (Canada).

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Phylogeography of Andean frogs.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Phylogeography of Andean frogs./
作者:	Koscinski, Daria.
面頁冊數:	132 p.
附註:	Source: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 2732.
Contained By:	Dissertation Abstracts International69-05B.
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NR39291
ISBN:	9780494392911

Phylogeography of Andean frogs.
Koscinski, Daria.

Phylogeography of Andean frogs. - 132 p.

Source: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 2732.

Thesis (Ph.D.)--The University of Western Ontario (Canada), 2008.

The mtDNA genealogical patterns of two co-distributed frogs, Hypsiboas andinus (Hylidae; 262 individuals, 26 sites) and Pleurodema borellii (Leptodactylidae; 131 individuals, 20 sites), were investigated in a little studied region of the Andes Mountains (northwestern Argentina and Bolivia) to further our understanding of diversification in the Neotropics.

ISBN: 9780494392911Subjects--Topical Terms:

1017726
Biology, Ecology.

Phylogeography of Andean frogs.
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100 1 $a Koscinski, Daria. $3 1018702
245 1 0 $a Phylogeography of Andean frogs.
300 $a 132 p.
500 $a Source: Dissertation Abstracts International, Volume: 69-05, Section: B, page: 2732.
502 $a Thesis (Ph.D.)--The University of Western Ontario (Canada), 2008.
520 $a The mtDNA genealogical patterns of two co-distributed frogs, Hypsiboas andinus (Hylidae; 262 individuals, 26 sites) and Pleurodema borellii (Leptodactylidae; 131 individuals, 20 sites), were investigated in a little studied region of the Andes Mountains (northwestern Argentina and Bolivia) to further our understanding of diversification in the Neotropics.
520 $a Phylogeographic analyses of H. andinus indicated significant genetic structure. The two main lineages diverged between 2-6 million years ago, possibly isolated during Andean uplift; current lineage sympatry may result from secondary contact due to range expansion or may reflect cryptic species. Within the most extensive clade, geographic structuring was consistent with probable habitat fragmentation and subsequent range expansion in the Pleistocene (<2 mya), a time of extensive climatic cycling and vegetational shifts. Average divergence among clades is lower than found in other Neotropical taxa, highlighting the importance of Pleistocene climatic history in diversification in the Andes.
520 $a Three models of movement among populations of H. andinus were compared at two spatial scales. Effective distances, which incorporate habitat suitability for H. andinus, explained more variation in genetic differentiation than straight-line distance at both spatial scales. In heterogeneous landscapes where barriers to dispersal may be common, effective distances better explain patterns of population differentiation.
520 $a In contrast to H. andinus, Pleurodema borellii exhibited signs of deeper temporal divergence although the geographic distribution of clades was similar. The three main lineages, separated about 4-10 mya, are nearly allopatric, suggesting a long history of isolation that may reflect cryptic species. All divergence events in P. borellii are older than those in H. andinus and we did not detect genetic divergence in P. borellii shallow enough to be influenced by the recent Pleistocene climatic cycling (<2 mya). Differences in the temporal patterns of divergence may be due to different biogeographic history of the two species, as H. andinus is a more recent (likely <10 mya) immigrant to the Andes. At similar spatial scales, genetic differentiation appeared lower in H. andinus than in P. borellii even though the latter is considered a "weedy species".
590 $a School code: 0784.
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Biology, Genetics. $3 1017730
650 4 $a Biology, Molecular. $3 1017719
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710 2 $a The University of Western Ontario (Canada). $3 1017622
773 0 $t Dissertation Abstracts International $g 69-05B.
790 $a 0784
791 $a Ph.D.
792 $a 2008
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