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Disturbance Is an Important Driver of Clonal Richness in Tropical Seagrasses

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dc.contributor Australian Inst Marine Sci
dc.contributor Csic - Centre D'estudis Avancats De Blanes (ceab)
dc.contributor Dept Environm Water & Nat Resources
dc.contributor Western Australian Marine Sci Inst
dc.contributor Lembaga Ilmu Pengetahuan Indonesia
dc.contributor Edith Cowan University
dc.contributor Indonesian Institute Of Sciences
dc.contributor Indian Ocean Marine Res Ctr
dc.contributor Edith Cowan Univ
dc.contributor Sch Biol Sci
dc.contributor Pusat Penelitian Oseanografi
dc.contributor University Of Western Australia
dc.contributor Univ Western Australia
dc.contributor State Herbarium South Australia
dc.contributor Univ Adelaide
dc.contributor Sch Sci
dc.contributor Ctr Marine Ecosyst Res
dc.contributor Ctr Estudios Avanzados Blanes
dc.contributor Uwa Oceans Inst
dc.contributor Australian Institute Of Marine Science
dc.contributor Sci & Conservat Div
dc.contributor Marine Sci Program
dc.contributor Csic
dc.contributor Sch Earth Sci
dc.contributor University Of Adelaide
dc.contributor Dept Biodivers Conservat & Attract
dc.contributor Consejo Superior De Investigaciones Cientificas (csic) WAYCOTT, MICHELLE MCMAHON, KATHRYN M. EVANS, RICHARD D. VAN DIJK, KOR-JENT HERNAWAN, UDHI KENDRICK, GARY A. LAVERY, PAUL S. LOWE, RYAN PUOTINEN, MARJI 2018-01-07T19:03:45Z 2018-01-07T19:03:45Z 2018-11-01T03:11:17Z 2018-01-07T19:03:45Z 2018-01-07T19:03:45Z 2018-11-01T03:11:17Z 2017-12-05
dc.identifier.citation McMahon KM, Evans RD, van Dijk KJ, Hernawan U, Kendrick GA, Lavery PS, Lowe R, Puotinen M, Waycott M (2017) Disturbance is an important driver of clonal richness in tropical seagrasses. Frontiers in Plant Science 8: 2026
dc.identifier.issn 1664-462X
dc.description.abstract Clonality is common in many aquatic plant species, including seagrasses, where populations are maintained through a combination of asexual and sexual reproduction. One common measure used to describe the clonal structure of populations is clonal richness. Clonal richness is strongly dependent on the biological characteristics of the species, and how these interact with the environment but can also reflect evolutionary scale processes especially at the edge of species ranges. However, little is known about the spatial patterns and drivers of clonal richness in tropical seagrasses. This study assessed the spatial patterns of clonal richness in meadows of three tropical seagrass species, Thalassia hemprichii, Halodule uninervis, and Halophila ovalis, spanning a range of life-history strategies and spatial scales (2.5-4,711 km) in Indonesia and NW Australia. We further investigated the drivers of clonal richness using general additive mixed models for two of the species, H. uninervis and H. ovalis, over 8. latitude. No significant patterns were observed in clonal richness with latitude, yet disturbance combined with sea surface temperature strongly predicted spatial patterns of clonal richness. Sites with a high probability of cyclone disturbance had low clonal richness, whereas an intermediate probability of cyclone disturbance and the presence of dugong grazing combined with higher sea surface temperatures resulted in higher levels of clonal richness. We propose potential mechanisms for these patterns related to the recruitment and mortality rates of individuals as well as reproductive effort. Under a changing climate, increased severity of tropical cyclones and the decline in populations of mega-grazers have the potential to reduce clonal richness leading to less genetically diverse populations.
dc.description.sponsorship We would like to thank Kathryn Dawkins, Natasha Dunham, and Ed Biffin for help in the lab. For field assistance we thank Nicole Ryan, Kevin Crane, Rachel Marshall, James McLaughlin, Roisin McCallum, Doug Bearham, J. P Hobbs, A. Isaac, S. Isaac, Abigail Moore, Bahtiar & K. Togaishamu, Wahyu Adi & Nur Annis, Try Al Tanto, Raismin Kotta, Yulius Suni, Ucu Y. Arbi, Susi Rahmawati, Supono, Alan, Alvi Sitepu, Ahmad Ainarwowan, Aliyadi, and Kadir Yamko. We thank Carlin Bowyer for assistance with compiling the remote sensing data. The majority of the Pilbara, Gascoyne, and Broome sample collections were funded by the Chevron-operated Wheatstone Project and the Woodside-operated Pluto Project for the State Environmental Offsets Program and administered by the Department of Biodiversity, Conservation and Attractions. The Wheatstone Project is a joint venture between Australian subsidiaries of Chevron, Kuwait Foreign Petroleum Exploration Company (KUFPEC), Woodside Petroleum Limited and Kyushu Electric Power Company, together with PE Wheatstone Pty Ltd (part owned by TEPCO). Some of the Pilbara samples were funded by the Western Australian Marine Science Institution Dredging Science Node. The Indonesian samples were funded by an ECU International Postgraduate Research Scholarship to UH; the G100379 project of the Department of Education and Training, Collaborative Research Network Program (Funding Agreement CRN2011:5, Edith Cowan University and University of Western Australia) to KM and PL; the Western Australian Marine Science Institution (WAMSI Kimberley Research Program: Project 1.1.3 Ecological Connectivity (KM); and the Indonesia Endowment Fund for Education (LPDP-Indonesia).
dc.language English
dc.subject Genetic Diversity
dc.subject Halophila-ovalis
dc.subject Asexual Reproduction
dc.subject Shark Bay
dc.subject Microsatellite Markers
dc.subject Dugong Grazing
dc.subject Disturbance
dc.subject Population
dc.subject Western-australia
dc.subject Sexual Reproduction
dc.subject Sea Surface Temperature (sst)
dc.subject Genotypic Diversity
dc.subject Clonality
dc.subject Eelgrass Zostera-marina
dc.subject Cyclone
dc.subject Plant Sciences
dc.title Disturbance Is an Important Driver of Clonal Richness in Tropical Seagrasses
dc.type journal article
dc.identifier.doi 10.3389/fpls.2017.02026
dc.identifier.wos WOS:000417035200001

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