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

Phylogeography and systematics of mo...

Njabo, Kevin Yana.

FindBook

Google Book

Amazon

博客來

Phylogeography and systematics of montane forest birds in Cameroon.

紀錄類型:	書目-語言資料,印刷品 : Monograph/item
正題名/作者:	Phylogeography and systematics of montane forest birds in Cameroon./
作者:	Njabo, Kevin Yana.
面頁冊數:	199 p.
附註:	Adviser: Michael D. Sorenson.
Contained By:	Dissertation Abstracts International67-04B.
標題:	Biology, Ecology. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3214968
ISBN:	9780542661754

Phylogeography and systematics of montane forest birds in Cameroon.
Njabo, Kevin Yana.

Phylogeography and systematics of montane forest birds in Cameroon. - 199 p.

Adviser: Michael D. Sorenson.

Thesis (Ph.D.)--Boston University, 2006.

The highlands of Western Cameroon support the only remaining extensive tracts of Afromontane flora and fauna in West Africa. The region supports a unique avifauna with a high level of endemism. This thesis focuses on several co-distributed endemic avifauna of the region with the aim of understanding their evolutionary origins and current population structure, and in turn, seeks to stimulate new initiatives and partnerships for the conservation and restoration of montane forests within the region. The research focuses on several exemplary taxa, including the African Hill Babblers, Pseudoalcippe abyssinica, a group of allopatric montane or insular populations with a broad distribution in all Afrotropical montane forests; the Mountain Robin Chat, Cossypha isabellae, which is restricted to the Cameroon Endemic Birds Areas; the African Wattle-eyes, a group of 10 species that includes both montane and lowland forms; and the Musophagidae, an enigmatic family of 23 species notable for their brightly colored feathers and ubiquitous distribution throughout sub Saharan Africa. Analyses of both mitochondrial and nuclear DNA sequence data from multiple loci for Hill Babbler and Robin Chat populations show strong evidence for long term isolation and genetic divergence of populations on different mountains. Morphological and behavioral divergence of Hill Babbler populations along with divergence times ranging up to &sim;3 million years suggest the recognition of at least six distinct species. Their distributions support Moreau's theory that East African species have larger ranges than West African species with the former harboring ancestral populations. Complete molecular phylogenies for the turacos and wattle-eyes were generated to study the evolutionary origins of two endangered species in Cameroon and allow inferences about the geography of speciation. These analyses suggest that historical climate change, through its effects on the vegetation of this region, resulted in vicariance of populations and promoted allopatric speciation on isolated montane islands. At present, lowland forests and savannah act as barriers to gene flow between montane populations. This research has helped to identify previously unrecognized avian biodiversity within the Cameroon mountains. Given the rapid depletion and destruction of these montane habitats, the conservation implications of recognizing these distinct species-level taxa are considerable.

ISBN: 9780542661754Subjects--Topical Terms:

1017726
Biology, Ecology.

Phylogeography and systematics of montane forest birds in Cameroon.
LDR:03375nam 2200301 a 45 001 965353
005 20110906
008 110906s2006 eng d
020 $a 9780542661754
035 $a (UnM)AAI3214968
035 $a AAI3214968
040 $a UnM $c UnM
100 1 $a Njabo, Kevin Yana. $3 1288128
245 1 0 $a Phylogeography and systematics of montane forest birds in Cameroon.
300 $a 199 p.
500 $a Adviser: Michael D. Sorenson.
500 $a Source: Dissertation Abstracts International, Volume: 67-04, Section: B, page: 1833.
502 $a Thesis (Ph.D.)--Boston University, 2006.
520 $a The highlands of Western Cameroon support the only remaining extensive tracts of Afromontane flora and fauna in West Africa. The region supports a unique avifauna with a high level of endemism. This thesis focuses on several co-distributed endemic avifauna of the region with the aim of understanding their evolutionary origins and current population structure, and in turn, seeks to stimulate new initiatives and partnerships for the conservation and restoration of montane forests within the region. The research focuses on several exemplary taxa, including the African Hill Babblers, Pseudoalcippe abyssinica, a group of allopatric montane or insular populations with a broad distribution in all Afrotropical montane forests; the Mountain Robin Chat, Cossypha isabellae, which is restricted to the Cameroon Endemic Birds Areas; the African Wattle-eyes, a group of 10 species that includes both montane and lowland forms; and the Musophagidae, an enigmatic family of 23 species notable for their brightly colored feathers and ubiquitous distribution throughout sub Saharan Africa. Analyses of both mitochondrial and nuclear DNA sequence data from multiple loci for Hill Babbler and Robin Chat populations show strong evidence for long term isolation and genetic divergence of populations on different mountains. Morphological and behavioral divergence of Hill Babbler populations along with divergence times ranging up to &sim;3 million years suggest the recognition of at least six distinct species. Their distributions support Moreau's theory that East African species have larger ranges than West African species with the former harboring ancestral populations. Complete molecular phylogenies for the turacos and wattle-eyes were generated to study the evolutionary origins of two endangered species in Cameroon and allow inferences about the geography of speciation. These analyses suggest that historical climate change, through its effects on the vegetation of this region, resulted in vicariance of populations and promoted allopatric speciation on isolated montane islands. At present, lowland forests and savannah act as barriers to gene flow between montane populations. This research has helped to identify previously unrecognized avian biodiversity within the Cameroon mountains. Given the rapid depletion and destruction of these montane habitats, the conservation implications of recognizing these distinct species-level taxa are considerable.
590 $a School code: 0017.
650 4 $a Biology, Ecology. $3 1017726
650 4 $a Biology, Genetics. $3 1017730
650 4 $a Biology, Molecular. $3 1017719
650 4 $a Biology, Zoology. $3 1018632
690 $a 0307
690 $a 0329
690 $a 0369
690 $a 0472
710 2 0 $a Boston University. $3 1017454
773 0 $t Dissertation Abstracts International $g 67-04B.
790 $a 0017
790 1 0 $a Sorenson, Michael D., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3214968