Abstract
The translocation of populations within their natural distribution ranges to instigate crossings between genetic stocks may enhance adaptive potential and resilience. Colonies of the reef-building coral, Acropora millepora, collected in the warmer central Great Barrier Reef (GBR) were experimentally crossed with conspecific colonies from the cooler southern GBR. Fertilisation success was high in all purebred and regional hybrid crosses (>83 %). After 4 months in the field at the southern location, survival rates differed as follows: native purebreds > regional hybrids > central GBR purebreds. The southern GBR purebreds were smaller at settlement compared with the other groups, but this difference disappeared towards the end of the grow-out period. While no benefit of genetic mixing in the F1 generation of this species was evident from our work, it is possible that hybrid vigour exists for other traits, such as thermal tolerance, and over different spatial scales, for different species, or in later generations.
References
Allendorf FW, Luikart G (2006) Conservation and the genetics of populations. Blackwell, Malden
Berkelmans R, van Oppen MJH (2006) The role of zooxanthellae in the thermal tolerance of corals: a ‘nugget of hope’ for coral reefs in an era of climate change. Proc R Soc Lond B Biol Sci 273:2305–2312
Fabricius KE, Mieog JC, Colin PL, Idip D, van Oppen MJH (2004) Identity and diversity of coral endosymbionts (zooxanthellae) from three Palauan reefs with contrasting bleaching, temperature and shading histories. Mol Ecol 13:2445–2458
Fogarty ND (2012) Caribbean acroporid coral hybrids are viable across life history stages. Mar Ecol Prog Ser 446:145–159
Frankham R, Ballou JD, Eldridge MDB, Lacy RC, Ralls K, Dudash MR, Fenster CB (2011) Predicting the probability of outbreeding depression. Conserv Biol 25:465–475
Hoegh-Guldberg O, Hughes L, McIntyre S, Lindenmayer DB, Parmesan C, Possingham HP, Thomas CD (2008) Assisted colonization and rapid climate change. Science 321:345–346
Howells EJ, Willis BL, Berkelmans R, van Oppen MJH, Bay LK (2013) Limits to thermal acclimatisation in corals. Ecology 94:1078–1088
Howells EJ, Beltran VH, Larsen NW, Bay LK, Willis BL, van Oppen MJH (2012) Coral thermal tolerance shaped by local adaptation of photosymbionts. Nat Clim Change 2:116–120
Kreyling J, Bittner T, Jaeschke A, Jentsch A, Steinbauer MJ, Thiel D, Beierkuhnlein C (2011) Assisted colonization: A question of focal units and recipient localities. Restor Ecol 19:433–440
Little AF, van Oppen MJH, Willis BL (2004) Flexibility in algal endosymbioses shapes growth in reef corals. Science 304:1492–1494
Mieog JC, Olsen JL, Berkelmans R, Bleuler-Martinez SA, Willis BL, van Oppen MJH (2009) The roles and interactions of symbiont, host and environment in defining coral fitness. PLoS ONE 4:e6364
Pedlar JH, McKenney DW, Aubin I, Beardmore T, Beaulieu J, Iverson L, O’Neill GA, Winder RS, Ste-Marie C (2012) Placing forestry in the assisted migration debate. Bioscience 62:835–842
Puill-Stephan E, van Oppen MJH, Pichavant-Rafini K, Willis BL (2011) High potential for formation and persistence of chimeras following aggregated larval settlement in the broadcast spawning coral, Acropora millepora. Proc R Soc Lond B Biol Sci 279:699–708
R Development Core Team (2013) A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. URL http://www.R-project.org/
Riegl BM, Purkis SJ, Al-Cibahy AS, Abdel-Moati MA, Hoegh-Guldberg O (2011) Present limits to heat-adaptability in corals and population-level responses to climate extremes. PLoS ONE 6:e24802
Sweatman H, Delean S, Syms C (2011) Assessing loss of coral cover on Australia’s Great Barrier Reef over two decades, with implications for longer-term trends. Coral Reefs 30:521–531
Thomas CD (2011) Translocation of species, climate change, and the end of trying to recreate past ecological communities. Trends Ecol Evol 26:216–221
Ulstrup KE, Berkelmans R, Ralph PJ, van Oppen MJH (2006) Variation in bleaching sensitivity of two coral species across a latitudinal gradient on the Great Barrier Reef: the role of zooxanthellae. Mar Ecol Progr Ser 314:135–148
van Oppen MJH, Peplow LM, Kininmonth S, Berkelmans R (2011) Historical and contemporary factors shape the population genetic structure of the broadcast spawning coral, Acropora millepora, on the Great Barrier Reef. Mol Ecol 20:4899–4914
Wachenfeld D, Johnson J, Skeat A, Kenchington R, Marshall P, Innes J (2007) Introduction to the Great Barrier Reef and climate change. In: Marshall PA, Johnson JE (eds) Climate change and the Great Barrier Reef. A vulnerability assessment. Great Barrier Reef Marine Park Authority and Australian Greenhouse Office, Townsville, pp 1–13
Weeks AR, Sgro CM, Young AG, Frankham R, Mirchell NJ, Miller KA, Byrne M, Coates DJ, Eldridge MDB, Sunnucks P, Breed MF, James EA, Hoffmann AA (2011) Assessing the benefits and risks of translocations in changing environments: a genetic perspective. Evol Appl 4:709–725
Acknowledgments
This research was jointly funded by the Great Barrier Reef Foundation and the Australian Institute of Marine Science. We would like to acknowledge statistical advice by M. Logan (AIMS).
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Supplementary material 1: Methods for fertilisation trials, rearing and settling of coral larvae, deployment of recruits into the field and photography of juveniles. (DOCX 1136 kb)
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van Oppen, M.J.H., Puill-Stephan, E., Lundgren, P. et al. First-generation fitness consequences of interpopulational hybridisation in a Great Barrier Reef coral and its implications for assisted migration management. Coral Reefs 33, 607–611 (2014). https://doi.org/10.1007/s00338-014-1145-2
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DOI: https://doi.org/10.1007/s00338-014-1145-2