Abstract
Ultramafic soils are found in many sites around the world where they can vary from exceptionally barren to reasonably fertile. Two ultramafic sites in western Ireland were studied: grassland at Dawros, County Galway and grassy heath near the base of Croagh Patrick, County Mayo. Rock and soil chemistry was examined along with foliar nutrients (at Dawros only). Ellenberg reaction values of all plant species recorded were determined. Two bioassays were conducted to determine relative differences in fertility between ultramafic and adjacent non-ultramafic soils and to assess nutrient limitation in the Croagh Patrick soil. Both soils showed many of the chemical characteristics typical of other ultramafic sites including a moderately high nickel concentration; in general, soil metal concentrations were higher in Dawros soils. However, nitrogen, phosphorus and calcium (with a calcium:magnesium ratio c. 0.6) were all at high concentrations at Dawros leading to a fertile grassland with both calcicole and calcifuge species present spanning six Ellenberg reaction values. Foliar nutrient concentrations were not unusual although calcium:magnesium ratios were approximately double in non-ultramafic soils compared to ultramafic soils. Croagh Patrick soil had lower concentrations of most nutrients and presented a grassy heath vegetation with more acidic reaction values. The bioassays showed plant growth to be reduced in this soil relative to that at Dawros and to be clearly limited by phosphorus availability. Whilst these two Irish ultramafic sites do not show the extreme features associated with other sites across the world they indicate the global diversity of serpentine ecologies.
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References
Brady KU, Kruckeberg AR, Bradshaw HD Jr (2005) Evolutionary ecology of plant adaptation to serpentine soils. Ann Rev Ecol Evol Syst 36:243–266. https://doi.org/10.1146/annurev.ecolsys.35.021103.105730
Brearley FQ (2005) Nutrient limitation in a Malaysian ultramafic soil. J Trop For Sci 17:596–609
Bremner DL, Leake BE (1981) The geology of the Roundstone ultrabasic complex Connemara. Proc Roy Ir Acad 80B:395–433
Chew DM (2001) Basement protrusion origin of serpentinite in the Dalradian. Ir J Earth Sci 19:23–35
Chiarucci A, Maccherini S (2007) Long-term effects of climate and phosphorus fertilization on serpentine vegetation. Plant Soil 293:133–144. https://doi.org/10.1007/s11104-007-9216-6
Chiarucci A, Maccherini S, Bonini I, De Dominicis V (1998) Effects of nutrient addition on species diversity and cover on “serpentine” vegetation. Plant Biosyst 132:143–150. https://doi.org/10.1080/11263504.1998.10654199
Connolly A (1992) A study of the effects of Croagh Patrick serpentine on vegetation, with the use of Agrostis stolonifera and Festuca rubra as examples in a sand culture system of crushed serpentine. Dissertation, Trinity College, University of Dublin
Cornara L, Roccotiello E, Minganti V, Drava G, De Pellegrini R, Mariotti MG (2007) Level of trace elements in Pteridophytes growing on serpentine and metalliferous soils. J Plant Nutr Soil Sci 170:781–787. https://doi.org/10.1002/jpln.200720099
D’Amico ME, Previtali F (2012) Edaphic influences of ophiolitic substrates on vegetation in the western Italian Alps. Plant Soil 351:73–95. https://doi.org/10.1007/s11104-011-0932-6
DeHart KS, Meindl GA, Bain DJ, Ashman T-L (2014) Elemental composition of serpentine plants depends on habitat affinity and organ type. J Plant Nutr Soil Sci 177:851–859. https://doi.org/10.1002/jpln.201300485
Dyos H, Proctor J, Sheehy Skeffington M (1991) Notes on the vegetation of the Dawros and other ultrabasic rock outcrops in Connemara. Ir Nat J 23:415–419
Ellenberg H, Weber HE, Düll R, Wirth V, Werner W, Paulißen D (1991) Zeigerwerte von Pflanzen in Mitteleuropa. Scripta Geobotanica 18. Verlag Erich Goltze KG, Göttingen, Germany, p 248
Ferreira REC (1963) Some distinctions between calciphilous and basiphilous plants. I. Field data. Trans Bot Soc Edinb 39:399–413. https://doi.org/10.1080/13594866309441725
Gallagher V (1989) The occurrence, textures, mineralogy and chemistry of a chromite-bearing serpentinite, Cummer, Co Wexford. Geol Surv Irel Bull 4:89–98
Harrison SH, Rajakaruna N (2011) Serpentine: the ecology and evolution of a model system. University of California Press, USA, p 464
Hill MO, Mountford JO, Roy DB, Bunce RGH (1999) Ellenberg’s Indicator Values for British Plants. ECOFACT Volume 2 Technical Annex. Huntingdon, Institute of Terrestrial Ecology, 46 pp. [http://nora.nerc.ac.uk/id/eprint/6411/1/ECOFACT2a.pdf]. Accessed 14th September 2016
Ho C-P, Hseu Z-Y, Chen N-C, Tsai C-C (2013) Evaluating heavy metal concentration of plants on a serpentine site for phytoremediation applications. Environ Earth Sci 70:191–199. https://doi.org/10.1007/s12665-012-2115-z
Horrill AD, Sykes JM, Idle ET (1975) The woodland vegetation of Inchcailloch, Loch Lomond. Trans Bot Soc Edinb 42:307–334. https://doi.org/10.1080/03746607508685295
Hunt E, O’Driscoll B, Daly JS (2012) Parental magma composition of the syntectonic Dawros peridotite chromitites, NW Connemara, Ireland. Geol Mag 149:590–605. https://doi.org/10.1017/S0016756811000872
Jeffrey DW (1992) Is there a serpentine flora in Ireland? In: Baker AJM, Proctor J, Reeves RD (eds) The Vegetation of Ultramafic (Serpentine) Soils: Proceedings of the First International Conference on Serpentine Ecology. Intercept, Andover, pp 243–251
Johnston WR, Proctor J (1979) Ecological studies on the Lime Hill serpentine, Scotland. Trans Bot Soc Edinb 43:145–150. https://doi.org/10.1080/03746607908685347
Lazarus BE, Richards JH, Claassen VP, O’Dell RE, Ferrell MA (2011) Species specific plant-soil interactions influence plant distribution on serpentine soils. Plant Soil 342:327–344. https://doi.org/10.1007/s11104-010-0698-2
Leake BE (1964) New light on the Dawros peridotite, Connemara, Ireland. Geol Mag 101:63–75. https://doi.org/10.1017/S0016756800048470
Lemon GC (1966) Serpentinites in the north-east Ox Mountains, Eire. Geol Mag 103:124–137. https://doi.org/10.1017/S0016756800050512
Marsili S, Roccotiello E, Rellini I, Giordani P, Barberis G, Mariotti MG (2009) Ecological studies on the serpentine endemic plant Cerastium utriense Barberis. Northeast Nat 16:405–421. https://doi.org/10.1656/045.016.0529
Max MD (1989) The Clew Bay Group: a displaced terrane of Highland border group rocks (Cambro-Ordovician) in northwest Ireland. Geol J 24:1–17. https://doi.org/10.1002/gj.3350240102
Nagy L, Proctor J (1997) Plant growth and reproduction on a toxic alpine ultramafic soil: adaptation to nutrient limitation. New Phytol 137:267–274. https://doi.org/10.1046/j.1469-8137.1997.00799.x
O’Dell RE, James JJ, Richards JH (2006) Congeneric serpentine and non-serpentine shrubs differ more in leaf Ca:Mg than in tolerance of low N, low P, or heavy metals. Plant Soil 280:49–64. https://doi.org/10.1007/s11104-005-3502-y
O’Driscoll B (2005) Textural equilibrium in magmatic layers of the Lough Fee ultramafic intrusion, NW Connemara: implications for adcumulus mineral growth. Ir J Earth Sci 23:39–45
Peterson BJ, Fry B (1987) Stable isotopes in ecosystem studies. Ann Rev Ecol Syst 18:293–320. https://doi.org/10.1146/annurev.es.18.110187.001453
Proctor J, Woodell SRJ (1975) The ecology of serpentine soils. Adv Ecol Res 9:255–365. https://doi.org/10.1016/S0065-2504(08)60291-3
Proctor J, Bartlem K, Carter SP, Dare DA, Jarvis SB, Slingsby DR (1991) Vegetation and soils of the Meikle Kilrannoch ultramafic sites. Bot J Scot 46:47–64. https://doi.org/10.1080/03746600508684771
Rothstein ATV (1957) The Dawros peridotite, Connemara, Eire. Q J Geol Soc Lond 113:599–602
Ryan PD, Sawal VK, Rowlands AS (1983) Ophiolitic mélange separates ortho- and para-tectonic caledonites in western Ireland. Nature 302:50–52. https://doi.org/10.1038/302050a0
Scannell MJP (1978) Asplenium cuneifolium Viv. in west Galway, Ireland. Ir Nat J 19:245
Selvi F, Carrari E, Colzi I, Coppi A, Gonnelli C (2017) Responses of serpentine plants to pine invasion: vegetation diversity and nickel accumulation in species with contrasting adaptive strategies. Sci Total Environ 595:72–80. https://doi.org/10.1016/j.scitotenv.2017.03.249
Sleep A (1985) Speciation in relation to edaphic factors in the Asplenium adiantum-nigrum group. Proc R Soc Edinb 86B:325–334. https://doi.org/10.1017/S0269727000008290
USDA (1987) Soil Mechanics Level 1: Module 3—USDA Textural Soil Classification. Study Guide. USDA Soil Conservation Service, Washington, DC, USA. [https://www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/stelprdb1044818.pdf]. Accessed 12th June 2017
van der Ent A, Erskine PD, Mulligan DR, Repin R, Karim R (2016) Vegetation on ultramafic edaphic islands in Kinabalu Park (Sabah, Malaysia) in relation to soil chemistry and altitude. Plant Soil 403:77–101. https://doi.org/10.1007/s11104-016-2831-3
Acknowledgements
Michael Deary, Robbie Goodhue, Mark Kavangh, David McKendry, Daniel Miklos, Gary Nip, Fran O’Donovan and Daniel Tanner are thanked for help with various technical aspects of the study. David Jeffrey and Roger Reeves allowed me to use their data in the Table 5. Boliden Tara Mines provided part funding for the study. I am grateful to all those who provided lifts on my hitch-hikes around western Ireland!
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Brearley, F.Q. Geo-ecological studies on two ultramafic sites in western Ireland. Ecol Res 33, 581–591 (2018). https://doi.org/10.1007/s11284-018-1584-2
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DOI: https://doi.org/10.1007/s11284-018-1584-2