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Population genetic subdivision of seagrasses, Syringodium isoetifolium and Thalassia hemprichii, in the Indonesian Archipelago

  • Benjamin J. Wainwright

    Benjamin J. Wainwright’s research is primarily motivated by the conservation of biodiversity and understanding the mechanisms that create and maintain it. He has a particular interest in the marine regions of S.E. Asia, especially the Coral Triangle.

     ORCID logo EMAIL logo     , Irma S. Arlyza and Stephen A. Karl
Published/Copyright: April 28, 2018
Botanica Marina
From the journal Botanica Marina Volume 61 Issue 3

Abstract

The population genetics of two seagrasses, Syringodium isoetifolium and Thalassia hemprichii were assessed throughout the Indonesian Archipelago. We genotyped 257 blades of S. isoetifolium at 15 microsatellite loci collected from 14 sampling sites and 406 blades of T. hemprichii at 17 microsatellite loci from 16 sampling sites. Once clones were removed, 165 individuals of S. isoetifolium and 389 of T. hemprichii were used in downstream analyses. Bayesian clustering methods revealed two genetically distinguishable clusters in each species, although the geographic boundaries of these clusters differed. Syringodium isoetifolium has a cluster that is located exclusively on the shallow Sunda Shelf and appears to follow the demarcation defined by Wallace’s line. Thalassia hemprichii, however, has a genetically distinguishable cluster located within the Banda Sea. The Banda Sea has unique physical oceanographic conditions, which may be driving the observed differentiation in T. hemprichii. We speculate that historical sea level changes exposing the Sunda Shelf, and the unique oceanographic conditions of the Banda Sea are contributing to the observed population differentiation. The observed genetic differentiation in both species is a possible starting point for speciation.

Keywords: conservation; Indonesia; marine protected areas; microsatellite variation; population subdivision

About the author

Benjamin J. Wainwright

Benjamin J. Wainwright’s research is primarily motivated by the conservation of biodiversity and understanding the mechanisms that create and maintain it. He has a particular interest in the marine regions of S.E. Asia, especially the Coral Triangle.

Acknowledgements

We thank the Indonesian government, the Research Center for Oceanography Indonesian Institute of Sciences and RISTEK for collecting permits, 0085/SIP/FRP/SM/V/2010 and 0133/SIP/FRP/SM/V/2010 under which all collections were made in full accordance with Indonesian laws and regulations. We thank the many Indonesians who helped with invaluable advice, support and kindness, all at Maluku Divers, La P’tite Kepa, The North Halmahera Tourism Information Center, Wallacea dive cruises, World Wildlife Fund for Nature, and the Wildlife Conservation Society Karimunjawa marine program, Z Arifin, ON Marwayana, HY Sugeha, Suharsono, S Hou and staff at the Advanced Studies in Genomics, Proteomics and Bioinformatics facility at the University of Hawai‘I, Ria Tan. Funding for this work was provided by the TOTAL Foundation, The University of Hawai‘i Graduate Student Organization, University of Hawai‘i Arts and Sciences Student Research Award, University of Hawai‘i Edmondson Grant, Dai Ho Chun Fund for Graduate Fellowships, Research Corporation of the University of Hawaii Graduate Fellowship, Sigma XI Grants In Aid of Research, The Explorers Club and The Rufford Small Grants Foundation.

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Supplemental Material:

The online version of this article offers supplementary material (https://doi.org/10.1515/botmar-2017-0058).

Received: 2017-8-15
Accepted: 2018-3-23
Published Online: 2018-4-28
Published in Print: 2018-6-27

©2018 Walter de Gruyter GmbH, Berlin/Boston

Articles in the same Issue

  1. Frontmatter
  2. In this issue
  3. Editorial
  4. Seagrass research in Southeast Asia
  5. Ecology
  6. The diet and feeding rates of gastropod grazers in Singapore’s seagrass meadows
  7. Complex yet fauna-deficient seagrass ecosystems at risk in southern Myanmar
  8. Species richness effects on the vegetative expansion of transplanted seagrass in Indonesia
  9. Spatial and temporal distribution of submerged aquatic vegetation in a tropical coastal lagoon habitat in Viet Nam
  10. Species diversity and distribution of seagrasses from the South Andaman, Andaman and Nicobar Islands, India
  11. Genetics and physiology
  12. Population genetic subdivision of seagrasses, Syringodium isoetifolium and Thalassia hemprichii, in the Indonesian Archipelago
  13. Photosynthetic and antioxidant responses of the tropical intertidal seagrasses Halophila ovalis and Thalassia hemprichii to moderate and high irradiances
  14. Physiological responses of Enhalus acoroides to osmotic stress
  15. Management and applications
  16. Seagrass in Southeast Asia: a review of status and knowledge gaps, and a road map for conservation
  17. Decadal biomass and area changes in a multi-species meadow in Singapore: application of multi-resolution satellite imagery
  18. A proposed decision support tool for prioritising conservation planning of Southeast Asian seagrass meadows: combined approaches based on ecosystem services and vulnerability analyses
https://doi.org/10.1515/bot-2017-0058
Keywords for this article
conservation; Indonesia; marine protected areas; microsatellite variation; population subdivision

Articles in the same Issue

  1. Frontmatter
  2. In this issue
  3. Editorial
  4. Seagrass research in Southeast Asia
  5. Ecology
  6. The diet and feeding rates of gastropod grazers in Singapore’s seagrass meadows
  7. Complex yet fauna-deficient seagrass ecosystems at risk in southern Myanmar
  8. Species richness effects on the vegetative expansion of transplanted seagrass in Indonesia
  9. Spatial and temporal distribution of submerged aquatic vegetation in a tropical coastal lagoon habitat in Viet Nam
  10. Species diversity and distribution of seagrasses from the South Andaman, Andaman and Nicobar Islands, India
  11. Genetics and physiology
  12. Population genetic subdivision of seagrasses, Syringodium isoetifolium and Thalassia hemprichii, in the Indonesian Archipelago
  13. Photosynthetic and antioxidant responses of the tropical intertidal seagrasses Halophila ovalis and Thalassia hemprichii to moderate and high irradiances
  14. Physiological responses of Enhalus acoroides to osmotic stress
  15. Management and applications
  16. Seagrass in Southeast Asia: a review of status and knowledge gaps, and a road map for conservation
  17. Decadal biomass and area changes in a multi-species meadow in Singapore: application of multi-resolution satellite imagery
  18. A proposed decision support tool for prioritising conservation planning of Southeast Asian seagrass meadows: combined approaches based on ecosystem services and vulnerability analyses
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