Abstract
The River Shannon, Ireland, among the last unregulated rivers in western Europe, has extensive floodplains and supports rare and endangered species and habitats, of ecological and cultural importance. Unregulated floodplains result in community composition responding directly to natural fluctuations in water level. This study assesses how hydrological factors and farming practices effect flood meadow plant communities. Three main plant communities were identified, forming an uninterrupted ecotone, along a gradient of dry to wet. Habitats of European conservation interest (Lowland Hay Meadows and Molinia Meadows) were well represented. Hydroperiod, calculated using microtopographical measurements, was the primary factor determining community composition and was negatively correlated with elevation and plant species richness. The botanical continuum comprised a range of insect-pollinated species, demonstrating the role of floodplains in providing pollinator services. Climate change projections indicate more prolonged winter flooding in the future, signifying potential range shifts for these plant species and communities; highlighting the need for appropriate conservation measures in the surrounding landscape. Low-intensity farming practices, with minimal fertiliser use and regular hay-mowing, played an essential, secondary role in maintaining plant species diversity. Retaining the floodplain topography, its associated hydrological regime and low-intensity farming practices, are necessary to maintain species diversity and ecosystem services.
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Aarts BG, van den Brink FW, Nienhuis PH (2004) Habitat loss as the main cause of the slow recovery of fish faunas of regulated large rivers in Europe: the transversal floodplain gradient. River Research and Applications 20:3–23
Bakker JP, Berendse F (1999) Constraints in the restoration of ecological diversity in grassland and heathland communities. Trends in Ecology & Evolution 14:63–68
Bakker JP, Elzinga JA, de Vries Y (2002) Effects of long-term cutting in a grassland system: perspectives for restoration of plant communities on nutrient-poor soils. Applied Vegetation Science 5:107–120
Biesmeijer J, Roberts S, Reemer M, Ohlemüller R, Edwards M, Peeters T, Schaffers A, Potts S, Kleukers R, Thomas C (2006) Parallel declines in pollinators and insect-pollinated plants in Britain and the Netherlands. Science 313:351–354
Bignal EM, McCracken DI (1996) Low-intensity farming systems in the conservation of the countryside. Journal of Applied Ecology 33:413–424
Blom C (1999) Adaptations to flooding stress: from plant community to molecule. Plant Biology 1:261–273
Bouraoui F, Grizzetti B, Aloe A (2009) Nutrient discharge from rivers to seas for year 2000. Joint Research Centre, European Commission, Brussels
Brennan C (2006) River Shannon and Errina and Park Canals: final ecology report to the Heritage Council. Waterway Corridor Study, Dublin
Carvell C, Roy DB, Smart SM, Pywell RF, Preston CD, Goulson D (2006) Declines in forage availability for bumblebees at a national scale. Biological Conservation 132:481–489
Casanova MT, Brock MA (2000) How do depth, duration and frequency of flooding influence the establishment of wetland plant communities? Plant Ecology 147:237–250
Charlton R, Fealy R, Moore S, Sweeney J, Murphy C (2006) Assessing the impact of climate change on water supply and flood hazard in Ireland using statistical downscaling and hydrological modelling techniques. Climatic Change 74:475–491
Cizek O, Zamecnik J, Tropek R, Kocarek P, Konvicka M (2012) Diversification of mowing regime increases arthropods diversity in species-poor cultural hay meadows. Journal of Insect Conservation 16:215–226
Clapham AR, Tutin TG, Moore DM (1987) Flora of the British Isles. Cambridge University Press, Cambridge
Cop J, Vidrih M, Hacin J (2009) Influence of cutting regime and fertilizer application on the botanical composition, yield and nutritive value of herbage of wet grasslands in Central Europe. Grass and Forage Science 64:454–465
Crawford RMM (1989) Studies in plant survival. Ecological case histories of plant adaptations to adversity. Blackwell Scientific Publications, Oxford
Díaz S, Cabido M (2001) Vive la différence: plant functional diversity matters to ecosystem processes. Trends in Ecology & Evolution (Personal Edition) 16:646–655
Dufrêne M, Legendre P (1997) Species assemblages and indicator species: the need for a flexible asymmetrical approach. Ecological Monographs 67:345–366
Edwards AR, Mortimer SR, Lawson CS, Westbury DB, Harris SJ, Woodcock BA, Brown VK (2007) Hay strewing, brush harvesting of seed and soil disturbance as tools for the enhancement of botanical diversity in grasslands. Biological Conservation 134:372–382
Fossitt JA (2000) A guide to habitats in Ireland. The Heritage Council/An Chomhairle Oidhreachta, Kilkenny
Gerard M, El Kahloun M, Rymen J, Beauchard O, Meire P (2008) Importance of mowing and flood frequency in promoting species richness in restored floodplains. Journal of Applied Ecology 45:1780–1789
Goodwillie RN (2003) Vegetation of turloughs. In: Otte ML (ed) Wetlands of Ireland: Distribution, ecology, uses and economic value. University College Dublin Press, Dublin, pp 135–144
Gowing DJG, Lawson CS, Youngs EG, Barber KR, Prosser MV, Wallace H, Rodwell JS, Mountford JO, Spoor G (2002) The water-regime requirements and the response to hydrological change of grassland plant communities. Project BD1310. Final report to DEFRA (Conservation Management Division), London
Grévilliot F, Krebs L, Muller S (1998) Comparative importance and interference of hydrological conditions and soil nutrient gradients in floristic biodiversity in flood meadows. Biodiversity and Conservation 7:1495–1520
Grime JP, Hodgson JG, Hunt R (2007) Comparative plant ecology: a functional approach to common British species, 2nd edn. Unwin Hyman Ltd, London
Grizzetti B, Bouraoui F, Aloe A (2012) Changes of nitrogen and phosphorus loads to European seas. Global Change Biology 18:769–782
Heery S (1991) The plant communities of the grazed and mown grasslands of the River Shannon Callows. Proceedings of the Royal Irish Academy 91B:1–19
Heery S (1993) The Shannon Floodlands: a natural history of the Shannon Callows. Tír Eolas, Kinvara
Heery S (1995) Flooding in spring on the Callows at Shannon Harbour, 1961–94. Biology and environment. Proceedings of the Royal Irish Academy 91B:172–179
Heery S (2003) Callows and floodplains. In: Otte ML (ed) Wetlands of Ireland. Distribution, ecology, uses and economic value. University College Dublin Press, Dublin, pp 109–123
Hegland SJ, Boeke L (2006) Relationships between the density and diversity of floral resources and flower visitor activity in a temperate grassland community. Ecological Entomology 31:532–538
Hickey K (2010) Deluge: Ireland’s weather disasters 2009–2010. Open Air Press, Dublin
Hill MO, Roy DB, Mountford JO, Bunce RG (2001) Extending Ellenberg’s indicator values to a new area: an algorithmic approach. Journal of Applied Ecology 37:3–15
Hooijer A (1996) Floodplain hydrology: an ecologically oriented study of the Shannon Callows. Ireland. Published PhD Thesis, Vrije Universiteit Amsterdam, The Netherlands
Hopkins A, Holz B (2006) Grassland for agriculture and nature conservation: production, quality and multi-functionality. Agronomy Research 4:3–20
Humbert JY, Ghazoul J, Richner N, Walter T (2010) Hay harvesting causes high orthopteran mortality. Agriculture Ecosystems & Environment 139:522–527
Humbert JY, Ghazoul J, Walter T (2009) Meadow harvesting techniques and their impacts on field fauna. Agriculture Ecosystems and Environment 130:1–8
Hwang T, Band L, Hales T (2009) Ecosystem processes at the watershed scale: extending optimality theory from plot to catchment. Water Resources Research 45:W11425
Johansson ME, Nilsson C, Nilsson E (1996) Do rivers function as corridors for plant dispersal? Journal of Vegetation Science 7:593–598
Joyce C (2001) The sensitivity of a species-rich flood-meadow plant community to fertilizer nitrogen: the Luznice river floodplain, Czech Republic. Plant Ecology 155:47–60
Jung V, Hoffmann L, Muller S (2009) Ecophysiological responses of nine floodplain meadow species to changing hydrological conditions. Plant Ecology 201:589–598
Kilroy G, Coxon C, Ryan J, O’Connor Á, Daly D (2005) Groundwater and wetland management in the Shannon river basin (Ireland). Environmental Science & Policy 8:219–225
Klaus VH, Kleinebecker T, Boch S, Müller J, Socher SA, Prati D, Fischer M, Hölzel N (2012) NIRS meets Ellenberg’s indicator values: prediction of moisture and nitrogen values of agricultural grassland vegetation by means of near-infrared spectral characteristics. Ecological Indicators 14:82–86
Luo WB, Song FB, Xie YH (2008) Trade-off between tolerance to drought and tolerance to flooding in three wetland plants. Wetlands 28:866–873
Magurran AE (2004) Measuring biological diversity. Blackwell, London
Maher C, Gormally M, Williams C, Sheehy Skeffington M (2014) Atlantic floodplain meadows: influence of hydrological gradients and management on sciomyzid (Diptera) assemblages. Journal of Insect Conservation 1–16
Maher CA (2013) The River Shannon Callows, Ireland: an examination of how flooding patterns and farming practices affect plant communities and dipteran assemblages on unregulated floodplain meadows. PhD, National University of Ireland Galway, Galway
Martin J, O’Neill F (2013) Report on the main results of the surveillance under article 17 for annex I habitat types (Annex D). National Parks and Wildlife Service, Dublin
McCune B, Mefford MJ (1999) PC-ORD. Multivariate Analysis of Ecological Data, Version 4. MjM Software Design, Gleneden Beach, OR, USA. 237pp
McCune B, Grace JB (2002) Analysis of ecological communities. MjM Software Design, Oregon
Mills G (2001) Ireland’s water budget—model validation and a greenhouse experiment. Irish Geography 34:124–134
Mountford JO, Lakhani KH, Kirkham FW (1993) Experimental assessment of the effects of nitrogen addition under hay-cutting and aftermath grazing on the vegetation of meadows on a Somerset peat moor. Journal of Applied Ecology 30:321–332
Muller S (2002) Diversity of management practices required to ensure conservation of rare and locally threatened plant species in grasslands: a case study at a regional scale (Lorraine, France). Biodiversity and Conservation 11:1173–1184
Naiman RJ, Decamps H, Pollock M (1993) The role of riparian corridors in maintaining regional biodiversity. Ecological Applications 3:209–212
Nairn RGW, Herbert IJ, Heery S (1988) Breeding waders and other wet grassland birds of the River Shannon Callows, Ireland. Irish Birds 3:521–538
Noordijk J, Delille K, Schaffers AP, Sýkora KV (2009) Optimizing grassland management for flower-visiting insects in roadside verges. Biological Conservation 142:2097–2103
NPWS (2008) The status of EU protected habitats and species in Ireland. National Parks and Wildlife Service, Dublin
NPWS (2011) Conservation objectives for River Shannon Callows SAC [000216]. National Parks and Wildlife Service, Dublin
Oelmann Y, Broll G, Hölzel N, Kleinebecker T, Vogel A, Schwartze P (2009) Nutrient impoverishment and limitation of productivity after 20 years of conservation management in wet grasslands of north-western Germany. Biological Conservation 142:2941–2948
Perrin PM, Martin JR, Barron SJ, Roche JR (2006) A cluster analysis approach to classifying Irish native woodlands. Biology & Environment: Proceedings of the Royal Irish Academy 106B:261–275
Pfister L, Kwadijk J, Musy A, Bronstert A, Hoffmann L (2004) Climate change, land use change and runoff prediction in the Rhine–Meuse basins. River Research and Applications 20:229–241
Pollock MM, Naiman RJ, Hanley TA (1998) Plant species richness in riparian wetlands—a test of biodiversity theory. Ecology 79:94–105
Ryder C, Moran J, Mc Donnell R, Gormally M (2005) Conservation implications of grazing practices on the plant and dipteran communities of a turlough in Co. Mayo, Ireland. Biodiversity and Conservation 14:187–204
Sheehy Skeffington M, Moran J, OConnor A, Regan E, Coxon CE, Scott NE, Gormally M (2006) Turloughs - Ireland’s unique wetland habitat. Biological Conservation 133:265–290
Spink A, Sparks RE, Van Oorschot M, Verhoeven JT (1998) Nutrient dynamics of large river floodplains. Regulated Rivers: Research and Management 14:203–216
SRBD (2003) Shannon river basin management project. Current management of water levels River Shannon. Shannon River Basin District, Limerick
Stace C (2010) New flora of the British isles, 3rd edn. Cambridge University Press, Cambridge
Steele-Dunne S, Lynch P, McGrath R, Semmler T, Wang S, Hanafin J, Nolan P (2008) The impacts of climate change on hydrology in Ireland. Journal of Hydrology 356:28–45
Stephens CJ, Dise NB, Mountford JO, Gowing DJ (2004) Impact of nitrogen deposition on the species richness of grasslands. Science 303:1876–1879
Sweeney K, Fealy R, McElwain L, Siggins L, Sweeney J, Trinies V (2008) Changing shades of green: the environmental and cultural impacts of climate change in Ireland. Irish American Climate Project, Berkeley
Tockner K, Uehlinger U, Robinson C, Tonolla D, Siber R, Peter F (2009) Introduction to European rivers. In: Tockner K, Robinson C, Uehlinger U (eds) Rivers of Europe. Academic, London
Tol RS, Langen A (2000) A concise history of Dutch river floods. Climatic Change 46:357–369
Wassen MJ, Peeters WHM, Venterink HO (2003) Patterns in vegetation, hydrology, and nutrient availability in an undisturbed river floodplain in Poland. Plant Ecology 165:27–43
Wesche K, Krause B, Culmsee H, Leuschner C (2012) Fifty years of change in Central European grassland vegetation: large losses in species richness and animal-pollinated plants. Biological Conservation 150:76–85
Williams CD, Beltman B, Moran J, Sheehy Skeffington M, Gormally MJ (2011) Empirical support for the possible application of modified Ellenberg indices to the study of environmental gradients on dynamic Irish wetlands—evidence from Skealoghan turlough, County Mayo. Biology & Environment: Proceedings of the Royal Irish Academy 111B:19–31
Acknowledgments
This project was funded by the Irish Research Council Science Engineering & Technology (IRCSET) under the Embark Initiative and in part by the NUI Galway, Thomas Crawford Hayes Trust Fund. The authors acknowledge support of the HEA under PRTLI4 for licensing OSI Digital Imagery through the Ryan Institute, NUI Galway. Ordinance Survey Ireland data is included under OSi licence number NUIG220212. Unauthorised reproduction infringes Ordinance Survey Ireland and Government of Ireland copyright. © Ordinance Survey Ireland, 2013. The authors acknowledge the Office of Public Works (OPW) and Electricity Supply Board (ESB) for providing river level data. The authors also acknowledge BirdWatch Ireland for providing assistance. The authors offer very special thanks to the farmers of the callows, for allowing access to their land, giving generously of their time and providing information on their farming practice. We are also grateful to Noel Bugler, David Gowing, Stephen Heery, and Christopher Williams for their help and advice during the research and to two reviewers for their very helpful and constructive comments on an earlier MS.
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Maher, C., Sheehy Skeffington, M. & Gormally, M. Hydroperiod and Traditional Farming Practices Drive Plant Community Composition on Unregulated Atlantic Floodplain Meadows. Wetlands 35, 263–279 (2015). https://doi.org/10.1007/s13157-014-0616-0
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DOI: https://doi.org/10.1007/s13157-014-0616-0