In deltas, subsidence leads to a relative sea-level rise (RSLR) that is often much greater than eustatic rise alone. Because of high RSLR, deltaic wetlands will be affected early by an acceleration of eustatic sea-level rise. If there is sufficient vertical accretion, wetlands can continue to exist with RSLR; however, lack of sediment input eventually leads to excessive water logging and plant death. Areas with low tidal range, such as the Mediterranean and Gulf of Mexico, are especially vulnerable to rising water levels because the elevational growth range of coastal vegetation is related to tide range. Reduction of suspended sediments in rivers and prevention of wetland flooding by river dikes and impoundments have reduced sediment input to Mediterranean and Gulf of Mexico deltaic wetlands. This sediment deficit will become more important with an acceleration in sea-level rise from global warming. Most sediment input occurs during strong pulsing events such as river floods and storms, and management policies and decisions are especially designed to protect against such events. Management approaches must be reoriented to take advantage of pulsing events to nourish marsh surfaces with sediments. We hypothesize that deltas can be managed to withstand significant rates of sea-level rise by taking advantage of pulsing events leading to high sediment input, and that this type of management approach will enhance ecosystem functioning.
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Baumann, R. H., J. W. Day, Jr. andC. Miller. 1984. Mississippi deltaic wetland survival; sedimentation versus coastal submergence.Science 224:1093–1095.
Boumans, R. M. andJ. W. Day, Jr. 1993. Measurement of small elevation changes in shallow coastal areas using a sedimentation-erosion table.Estuaries 16:375–380.
Boumans R. M. andJ. W. Day Jr. 1994. Effects of two marsh management plans on water and materials flux and short-term sedimentation.Wetlands 14:247–261.
Bouwsema, P., J. H. Bossinade, K. S. Dijkema, J. W. Th. M. van Meegan, R. Reenders, and W. Vrieling. 1986. De ontwikkeling van de hoogte en van de omvang van de kwelders in the landaanwinningswerken in Friesland en Groningen. Rijksinstituut voor Natuurbeheer, Texel. RIN-rapport 86/3.
Cahoon, D. andR. E. Turner. 1989. Accretion and canal impacts in a rapidly subsiding wetland. II. Feldspar marker horizon technique.Estuaries 12:260–268.
Cahoon, D. 1994. Recent accretion in two managed marsh impoundments in coastal Louisiana.Ecological Applications 4:166–176.
Corre, J.-J. 1992. Implications des changements climatiques etude de cas: le Golfe du Lyon, p. 328–427.In L. Jeftic, J. Milliman, and G. Sestini (eds.) Climatic Change and the Mediterranean. Edward Arnold, London.
Craig, N. J., R. E. Turner andJ. W. Day, Jr. 1979. Land loss in coastal Louisiana (USA).Environmental Management 3:133–144.
Day, J. W. 1992. Sea level rise, management options and the future of Mediterranean coastal wetlands, p. 32–38.In C. M. Finlayson, G. E. Hollis, and T. J. Davis (eds.), Proceedings of Conference on Managing Mediterranean Wetlands and Their Birds for the Year 2000 and Beyond. IWRB Special Publication No. 20, Slimbridge, United Kingdom.
Day, J. W. andP. H. Templet. 1989. Consequences of sea level rise: Implications from the Mississippi Delta.Coastal Management 17:241–257.
Day, R., R. Holz andJ. W. Day. 1990. An inventory of wetland impoundments in the coastal zone of Louisiana, USA: Historical trends.Environmental Management 14:229–240.
Forés, E. andF. Comín. 1987 Chemical characteristics of the water in the ricefields of the Ebro Delta (NE Spain).Archive fuer Hydrobiologie 111:15–24.
Gael, B. T. andC. S. Hopkinson. 1979. Drainage density, land use, and eutrophication in Barataria Basin, Louisiana, p. 147–163.In J. W. Day, Jr., D. D. Culley, Jr., R. E. Turner, and A. J. Mumphrey (eds), Proceedings, Third Coastal Marsh and Estuary Management Symposium. Louisiana State University, Division of Continuing Education, Baton Rouge, Louisiana.
Georgas, D. andC. Perissoratis. 1992. Implications of future climate changes on the inner Thermaikos Gulf, p. 495–534.In L. Jeftic, J. Milliman, and G. Sestini (eds.), Climatic Change and the Mediterranean. Edward Arnold, London.
Godfrey, P. J., E. R. Kaynor, S. Pelczarski, andJ. Benforado. (eds.) 1985. Ecological Considerations in Wetland Treatment of Municipal Wastewaters. Van Nostrand Reinhold, New York.
Gornitz, V., S. Lebedeff, andJ. E. Hansen. 1982. Global sea level trends in the past century.Science 215:1611–1614.
Hackney, C. T. andW. J. Cleary. 1987. Saltmarsh loss in southeastern North Carolina lagoons: Importance of sea level rise and inlet dredging.Journal of Coastal Research 3:93–97.
Hatton, R. S., W. H. Patrick, Jr. andR. D. DeLaune. 1992. Sedimentation, nutrient accumulation, and early diagenesis in Louisiana Barataria basin coastal marshes p. 255–267.In V. S. Kennedy (ed.), Estuarine Comparisons. Academic Press, Inc. New York.
L’Homer, A. 1992. Sea-level changes and impacts on the Rhone coastal lowlands, p. 136–152. A. Tooley, M. Jelgersma and S. Jelgersma (eds.), Impacts of Sea-level Rise on European Coastal Lowlands. Blackwell Publishers Oxford, United Kingdom.
Jeftic, L., J. Milliman andG. Sestini (eds.). 1992. Climatic Change and the Mediterranean. Edward Arnold, London.
Kerr, R. A. 1989. Bringing down the sea level rise.Science 246: 1563.
Madden, C. J., J. Day, andJ. Randall. 1988. Coupling of freshwater and marine systems in the Mississippi deltaic plain.Limnology and Oceanography 33:982–1004.
Mariño, M. 1992. Implications of climatic change on the Ebro delta, p. 304–327.In L. Jeftic, J. Milliman, and G. Sestini (eds.) Climatic Change and the Mediterranean. Edward Arnold, London.
McKee, K. andW. Patrick. 1988. The relationship of smooth cordgrass (Spartina alterniflora) to tidal datums: a review.Estuaries 11:143–151.
McKee, K. andI. Mendelssohn. 1989. Response of a freshwater marsh plant community to increased salinity and increased water level.Aquatic Botany 34:301–316.
McMillan, J. andK. Emery. 1968. Sealevels during the past 35,000 years.Science 162:1121–1123.
Muñoz, I. andN. Prat. 1989. Effects of river regulation on the lower Ebro river (NE Spain). Regulated rivers.Research and Management 3:345–54.
Nyman, J., R. DeLaune, andW. Patrick. 1990. Wetland soil formation in the rapidly subsiding Mississippi River deltaic plain: Mineral and organic matter relationships.Estuarine, Coastal and Shelf Science 31:57–69.
Penland, S. andK. E. Ramsey. 1990. Relative sea-level rise in Louisiana and the Gulf of Mexico.Journal of Coastal Research 6:323–342.
Reed, D. 1989. Patterns of sediment deposition in subsiding coastal salt marshes, Terebonne Bay, Louisiana.Estuaries 12: 222–227.
Rogers, D., B. Rogers, andW. Herke. 1992. Effects of a marsh management plan on fishery communities in coastal Louisiana.Wetlands 12:53–62.
Scaife, W., R. E. Turner, andR. Costanza 1983. Coastal Louisiana recent land loss and canal impacts.Environmental Management 7:433–442.
Sestini, G. 1992. Implications of climatic changes for the Po delta and Venice lagoon, p. 428–494.In L. Jeftic, J. Milliman, and G. Sestini (eds.) Climatic Change and the Mediterranean. Edward Arnold, London.
Stanley, D. 1988. Subsidence in the northeastern Nile delta: Rapid rates, possible causes, and consequences.Science 240: 497–500.
Stanley, D. 1990. Recent subsidence and northeast tilting of the Nile delta: Egypt.Science 240:497–500.
Stanley, D. andA. Warne. 1993. Nile delta: Recent geological evolution and human impacts.Science 260:628–634.
Stern, M., J. Day, andK. Teague. 1991. Nutrient transport in a riverine-influenced, tidal freshwater bayou in Louisiana.Estuaries 14:382–394.
Stevenson, J. C., L. Ward, andM. Kearney. 1988 Sediment transport and trapping in marsh systems: implications of tidal flux studies.Marine Geology 80:37–59.
Swenson, E. andR. Turner. 1987. Spoil banks: Effects on a coastal marsh water-level regime.Estuarine, Coastal and Shelf Science 24:599–609.
Tamisier, A. 1990. Camargue: Milieux et Paysages, Evolution de 1942 à 1984. Association Pour les Recherches en Camargue Sur la Nature et l’Environnement, Montpellier, France.
Tooley, M. andS. Jelgersma. 1992. Impacts of Sea-Level Rise on European Coastal Wetlands. Blackwell Oxford, United Kingdom.
Turner, R. 1991. Tide guage records, water level rise, and subsidence in the Northern Gulf of Mexico.Estuaries 14:139–147.
van Heerden, I. L., J. T. Wells andH. H. Roberts 1983. The Atchafalaya Delta—rapid progradation along a traditionally retreating coast (south central Louisiana).Canadian Journal of Fisheries 40:60–71.
Varela, J., A. Gallardo, and A. Lopez de Velasco. 1983. Retencion de solidos por los embalses de Mequinenza y Ribarroja. Efectos sobre los aportes al Delta del Ebro, p. 203–219.In M. Marino (ed.), Sistema Integrado del Ebro. Madrid, Spain.
Warrick, R. andJ. Oerlemans. 1990. Sea level rise, p. 257–281.In J. Houghton, G. Jenkins, and J. Ephraums (eds.), Climate Change: The IPCC Scientific Assessment. Cambridge University Press, Cambridge.
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Day, J.W., Pont, D., Hensel, P.F. et al. Impacts of sea-level rise on deltas in the Gulf of Mexico and the Mediterranean: The importance of pulsing events to sustainability. Estuaries 18, 636–647 (1995) doi:10.2307/1352382
- Coastal Wetland
- Nile Delta
- Sediment Input
- River Flood
- Pulse Event