Journal ArticleDOI
Oceanic currents, not land masses, maintain the genetic structure of the mangrove Rhizophora mucronata Lam. (Rhizophoraceae) in Southeast Asia
Alison K. S. Wee,Koji Takayama,Takeshi Asakawa,Bijoy Thompson,Onrizal,Sarawood Sungkaew,Nguyen Xuan Tung,M. Nazre,Khin Khin Soe,Hugh T. W. Tan,Yasuyuki Watano,Shigeyuki Baba,Tadashi Kajita,Edward L. Webb +13 more
Reads0
Chats0
TLDR
Novel evidence is presented that the genetic structure of R. mucronata is maintained by ocean current-facilitated propagule dispersal, which can be explained by the prevailing ocean currents in this region.Abstract:
Aim
Mangroves are intertidal plants with sea-dispersed propagules, hence their population structure can offer valuable insights into the biogeographical processes driving population subdivision in coastal species. In this study, we used molecular markers and ocean circulation simulations to examine the effects of ocean currents and land masses on the genetic structure of the major mangrove species Rhizophora mucronata.
Location
Southeast Asia.
Methods
We assessed the genetic structure of 13 R. mucronata populations from continental Southeast Asia and Sumatra using 10 microsatellite loci. We first examined the relative effects of geographical distance and land mass (the Malay Peninsula) in shaping the genetic structure of R. mucronata in Southeast Asia. We then characterized the genetic structure of R. mucronata and compared it to the simulated ocean circulation patterns within our study region.
Results
Despite the low genetic diversity, significant genetic structuring was detected across R. mucronata populations. Contrary to observations on other mangrove species, genetic differentiation in R. mucronata was not found across the coasts of the Malay Peninsula, nor was it correlated with geographical distance. Instead, the most distinct genetic discontinuity was found at the boundary between the Andaman Sea and the Malacca Strait, and this can be explained by the prevailing ocean currents in this region.
Main conclusions
Our study presents novel evidence that the genetic structure of R. mucronata is maintained by ocean current-facilitated propagule dispersal.read more
Citations
More filters
Journal ArticleDOI
A general framework for propagule dispersal in mangroves.
Tom Van der Stocken,Tom Van der Stocken,Alison K. S. Wee,Alison K. S. Wee,Dennis De Ryck,Bram Vanschoenwinkel,Daniel A. Friess,Farid Dahdouh-Guebas,Farid Dahdouh-Guebas,Marc Simard,Nico Koedam,Edward L. Webb +11 more
TL;DR: It is shown that important dispersal factors remain understudied and that adequate empirical data on the determinants of dispersal are missing for most mangrove species, as well as the mechanisms and ecological processes that are known to modulate the spatial patterns of mangroves dispersal.
Journal ArticleDOI
Multiple-Geographic-Scale Genetic Structure of Two Mangrove Tree Species: The Roles of Mating System, Hybridization, Limited Dispersal and Extrinsic Factors
TL;DR: The first evidence of ongoing hybridization between Avicennia species and that these hybrids are fertile is reported, although this interspecific crossing has not contributed to an increase in the genetic diversity the populations where A. germinans and A. schaueriana hybridize.
Book ChapterDOI
Landscape Genomics: Understanding Relationships Between Environmental Heterogeneity and Genomic Characteristics of Populations
Niko Balkenhol,Rachael Y. Dudaniec,Konstantin V. Krutovsky,Jeremy S. Johnson,David M. Cairns,Gernot Segelbacher,Kimberly A. Selkoe,Sophie von der Heyden,Ian J. Wang,Oliver Selmoni,Stéphane Joost +10 more
TL;DR: Landscape genomics is a rapidly advancing research field that combines population genomics, landscape ecology, and spatial analytical techniques to explicitly quantify the effects of environmental heterogeneity on neutral and adaptive genetic variation and underlying processes.
Book ChapterDOI
Mangrove floristics and biogeography revisited: further deductions from biodiversity hot spots, ancestral discontinuities and common evolutionary processes
TL;DR: In this article, an updated account of mangrove biodiversity patterns and evolution based on ancestral biogeography and extant floristics is provided, where the factors influencing current distributional patterns have been looked at closely with the specific distributions of each genotype considering prior historical influences.
Journal ArticleDOI
Genetic differentiation and phylogeography of partially sympatric species complex Rhizophora mucronata Lam. and R. stylosa Griff. using SSR markers.
Alison K. S. Wee,Alison K. S. Wee,Koji Takayama,Jasher L. Chua,Takeshi Asakawa,Sankararamasubramanian Halasya Meenakshisundaram,Onrizal,Bayu Adjie,Erwin Riyanto Ardli,Sarawood Sungkaew,Norhaslinda Binti Malekal,Nguyen Xuan Tung,Severino G. Salmo,Orlex B. Yllano,M. Nazre Saleh,Khin Khin Soe,Yoichi Tateishi,Yasuyuki Watano,Shigeyuki Baba,Edward L. Webb,Tadashi Kajita +20 more
TL;DR: The results serve as the foundation for the conservation genetics of R. mucronata and R. stylosa and highlighted the need to recognize the genetic distinctiveness of closely-related species, determine their respective genetic structure, and avoid artificially promoting hybridization in mangrove restoration programmes.
References
More filters
Journal ArticleDOI
Landscape genetics, historical isolation and cross-Andean gene flow in the wax palm, Ceroxylon echinulatum (Arecaceae).
TL;DR: A joint effect of founder dynamics, divergence by distance and historical isolation on patterns of Andean diversity and distribution is illustrated.
Journal ArticleDOI
Population genetic structure and conservation implications of Ceriops decandra in Malay Peninsula and North Australia
TL;DR: In this article, the inter-simple sequence repeat (ISSR) was used to determine the genetic diversity within and among populations of a widespread viviparous mangrove Ceriops decandra using 10 natural populations from Malay Peninsula and North Australia.
Journal ArticleDOI
Genetic variation in Lumnitzera racemosa, a mangrove species from the Indo-West Pacific
TL;DR: The high degree of population differentiation between regions and low genetic variation within populations recorded here highlights the need for appropriate conservation measures for this species, both in terms of incorporating further populations into protected areas, and the restoration strategies for separate regions.
Journal ArticleDOI
Study of Genetic Diversity of Orange-Spotted Grouper, Epinephelus coioides, from Thailand and Indonesia Using Microsatellite Markers
TL;DR: Genetic diversity of Epinephelus coioides (Hamilton, 1822), which inhabits coastal reefs from the western Indian Ocean to the western Pacific Ocean, was studied based on four polymorphic microsatellite loci.
Journal ArticleDOI
Conservation genetics of Lumnitzera littorea (Combretaceae), an endangered mangrove, from the Indo-West Pacific
TL;DR: The high degree of differentiation observed among populations emphasizes the need for appropriate conservation measures that incorporate additional populations into protected areas, and achieve the restoration of separate, degraded populations.