Relatedness defies biogeography: the tale of two island endemics (Acacia heterophylla and A. koa)

被引:50
作者
Le Roux, Johannes J. [1 ]
Strasberg, Dominique [2 ]
Rouget, Mathieu [3 ]
Morden, Clifford W. [4 ]
Koordom, Megan [1 ]
Richardson, David M. [1 ]
机构
[1] Univ Stellenbosch, Dept Bot & Zool, Ctr Invas Biol, ZA-7602 Matieland, South Africa
[2] Univ La Reunion, UMR PVBMT, F-97744 St Denis Messag 9, France
[3] Univ KwaZulu Natal, Ctr Invas Biol Land Use Planning & Management, Sch Agr Earth & Environm Sci, ZA-3209 Pietermaritzburg, South Africa
[4] Univ Hawaii, Dept Bot, Honolulu, HI 96822 USA
基金
新加坡国家研究基金会;
关键词
Acacia heterophylla; Acacia koa; endemism; extreme long-distance dispersal; island biogeography; niche conservatism; AUSTRALIAN ACACIAS; GENETIC-STRUCTURE; LEGUMINOSAE; CONSERVATISM; DISPERSAL; BIOTA; TREES; PLANT; DIFFERENTIATION; MIMOSOIDEAE;
D O I
10.1111/nph.12900
中图分类号
Q94 [植物学];
学科分类号
071001 [植物学];
摘要
Despite the normally strong link between geographic proximity and relatedness of recently diverged taxa, truly puzzling biogeographic anomalies to this expectation exist in nature. Using a dated phylogeny, population genetic structure and estimates of ecological niche overlap, we tested the hypothesis that two geographically very disjunct, but morphologically very similar, island endemics (Acacia heterophylla from Reunion Island and A. koa from the Hawaiian archipelago) are the result of dispersal between these two island groups, rather than independent colonization events from Australia followed by convergent evolution. Our genetic results indicated that A. heterophylla renders A. koa paraphyletic and that the former colonized the Mascarene archipelago directly from the Hawaiian Islands <= 1.4 million yr ago. This colonization sequence was corroborated by similar ecological niches between the two island taxa, but not between A. melanoxylon from Australia (a sister, and presumed ancestral, taxon to A. koa and A. heterophylla) and Hawaiian A. koa. It is widely accepted that the long-distance dispersal of plants occurs more frequently than previously thought. Here, however, we document one of the most exceptional examples of such dispersal. Despite c. 18 000 km separating A. heterophylla and A. koa, these two island endemics from two different oceans probably represent a single taxon as a result of recent extreme long-distance dispersal.
引用
收藏
页码:230 / 242
页数:13
相关论文
共 95 条
[1]
Genetic differentiation and diversity of Acacia koa populations in the Hawaiian Islands [J].
Adamski, Daniel J. ;
Dudley, Nicklos S. ;
Morden, Clifford W. ;
Borthakur, Dulal .
PLANT SPECIES BIOLOGY, 2012, 27 (03) :181-190
[2]
STUDIES IN THE LEGUMINOSAE .2. CYTOGEOGRAPHY OF ACACIA (TOURN.) L [J].
ATCHISON, E .
AMERICAN JOURNAL OF BOTANY, 1948, 35 (10) :651-655
[3]
Bentham G., 1875, Transactions of the Linnean Society of London, V30, P335, DOI [10.1111/j.1096-3642.1875.tb00005.x, DOI 10.1111/J.1096-3642.1875.TB00005.X]
[4]
Dispersal pathways across the Pacific: the historical biogeography of Astelia s.l. (Asteliaceae, Asparagales) [J].
Birch, Joanne L. ;
Keeley, Sterling C. .
JOURNAL OF BIOGEOGRAPHY, 2013, 40 (10) :1914-1927
[5]
Multiple intercontinental dispersals shaped the distribution area of Hordeum (Poaceae) [J].
Blattner, FR .
NEW PHYTOLOGIST, 2006, 169 (03) :603-614
[6]
Towards a Transferable and Cost-Effective Plant AFLP Protocol [J].
Blignaut, Marguerite ;
Ellis, Allan G. ;
Le Roux, Johannes J. .
PLOS ONE, 2013, 8 (04)
[7]
Measuring ecological niche overlap from occurrence and spatial environmental data [J].
Broennimann, Olivier ;
Fitzpatrick, Matthew C. ;
Pearman, Peter B. ;
Petitpierre, Blaise ;
Pellissier, Loic ;
Yoccoz, Nigel G. ;
Thuiller, Wilfried ;
Fortin, Marie-Josee ;
Randin, Christophe ;
Zimmermann, Niklaus E. ;
Graham, Catherine H. ;
Guisan, Antoine .
GLOBAL ECOLOGY AND BIOGEOGRAPHY, 2012, 21 (04) :481-497
[8]
Acacia s.s. and its Relationship Among Tropical Legumes, Tribe Ingeae (Leguminosae: Mimosoideae) [J].
Brown, Gillian K. ;
Murphy, Daniel J. ;
Miller, Joseph T. ;
Ladiges, Pauline Y. .
SYSTEMATIC BOTANY, 2008, 33 (04) :739-751
[9]
Phylogenetic connections of phyllodinous species of Acacia outside Australia are explained by geological history and human-mediated dispersal [J].
Brown, Gillian K. ;
Murphy, Daniel J. ;
Kidman, James ;
Ladiges, Pauline Y. .
AUSTRALIAN SYSTEMATIC BOTANY, 2012, 25 (06) :390-403
[10]
Incorporation of sodium sulfite into extraction protocol minimizes degradation of Acacia DNA [J].
Byrne, M ;
Macdonald, B ;
Francki, M .
BIOTECHNIQUES, 2001, 30 (04) :742-+