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题名: Biogeographic diversification in Nolana (Solanaceae), a ubiquitous member of the Atacama and Peruvian Deserts along the western coast of South America
作者: Dillon, Michael O.2; Tu, Tieyao3; Xie, Lei1; Quipuscoa Silvestre, Victor4; Wen, Jun1, 5
刊名: JOURNAL OF SYSTEMATICS AND EVOLUTION
关键词: Atacama Desert ; biogeography ; chloroplast DNA ; LEAFY second intron ; Nolana ; Peruvian Desert ; Solanaceae ; South America
英文摘要: The present paper reconstructs the biogeographic diversification for Nolana L.f. (Solanaceae), a genus of 89 endemic species largely restricted to fog-dependent desert lomas formations of coastal Peru and Chile. Previous efforts have reconstructed a phylogenetic estimate for Nolana using a combination of molecular markers. Herein, we expand on those results to examine hypotheses of biogeographic origins and diversification patterns. Nolana occupies habitats within a continuous coastal desert and forms a terrestrial archipelago of discrete "islands" unique in size, topography, and species composition. Each locality contains at least one Nolana species and many contain multiple species in sympatry. The genus has a Chilean origin, with the basal clades confined to Chile with wide geographic and ecological distributions. Peru contains two strongly supported clades, suggesting two introductions with subsequent radiation. A Chilean clade of shrubby, small-flowered species appears to have had its origins from the same ancestors of the second line that radiated in Peru and northern Chile. Nolana galapagensis is endemic to the Islas Galapagos, with origins traced to Peruvian taxa with a divergence time of 0.35 mya. Rates of diversification over the past 4.02 mya in Nolana, in one of the driest habitats on Earth, suggest rapid adaptive radiation in several clades. Success in Nolana may be attributed to characters that confer a competitive advantage in unpredictable and water-dependent environments, such as succulent leaf anatomy and ecophysiology, and the reproductive mericarp unique to Nolana. The processes affecting or shaping the biota of western South America are discussed.
出版日期: 2009-09-01
卷号: 47, 期号:5, 页码:457-476
语种: 英语
收录类别: SCI
学科分类: Plant Sciences
ISSN号: 0529-1526
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3004
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Key Lab Biodivers & Biogeog, Kunming Inst Bot, Kunming 650204, Peoples R China
2.Field Museum Nat Hist, Dept Bot, Chicago, IL 60605 USA
3.Chinese Acad Sci, S China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China
4.Univ Nacl San Agustin, Dept Bot, Arequipa, Peru
5.Smithsonian Inst, Dept Bot, MRC 166, Natl Museum Nat Hist, Washington, DC 20013 USA

Recommended Citation:
Dillon, MO; Tu, TY; Xie, L; Silvestre, VQ; Wen, J.Biogeographic diversification in Nolana (Solanaceae), a ubiquitous member of the Atacama and Peruvian Deserts along the western coast of South America,JOURNAL OF SYSTEMATICS AND EVOLUTION,2009,47(5):457-476
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