Ecosystems

, Volume 13, Issue 1, pp 129–143 | Cite as

Surface Elevation Change and Susceptibility of Different Mangrove Zones to Sea-Level Rise on Pacific High Islands of Micronesia

  • Ken W. Krauss
  • Donald R. Cahoon
  • James A. Allen
  • Katherine C. Ewel
  • James C. Lynch
  • Nicole Cormier
Article

Abstract

Mangroves on Pacific high islands offer a number of important ecosystem services to both natural ecological communities and human societies. High islands are subjected to constant erosion over geologic time, which establishes an important source of terrigeneous sediment for nearby marine communities. Many of these sediments are deposited in mangrove forests and offer mangroves a potentially important means for adjusting surface elevation with rising sea level. In this study, we investigated sedimentation and elevation dynamics of mangrove forests in three hydrogeomorphic settings on the islands of Kosrae and Pohnpei, Federated States of Micronesia (FSM). Surface accretion rates ranged from 2.9 to 20.8 mm y−1, and are high for naturally occurring mangroves. Although mangrove forests in Micronesian high islands appear to have a strong capacity to offset elevation losses by way of sedimentation, elevation change over 6½ years ranged from −3.2 to 4.1 mm y−1, depending on the location. Mangrove surface elevation change also varied by hydrogeomorphic setting and river, and suggested differential, and not uniformly bleak, susceptibilities among Pacific high island mangroves to sea-level rise. Fringe, riverine, and interior settings registered elevation changes of −1.30, 0.46, and 1.56 mm y−1, respectively, with the greatest elevation deficit (−3.2 mm y−1) from a fringe zone on Pohnpei and the highest rate of elevation gain (4.1 mm y−1) from an interior zone on Kosrae. Relative to sea-level rise estimates for FSM (0.8–1.8 mm y−1) and assuming a consistent linear trend in these estimates, soil elevations in mangroves on Kosrae and Pohnpei are experiencing between an annual deficit of 4.95 mm and an annual surplus of 3.28 mm. Although natural disturbances are important in mediating elevation gain in some situations, constant allochthonous sediment deposition probably matters most on these Pacific high islands, and is especially helpful in certain hydrogeomorphic zones. Fringe mangrove forests are most susceptible to sea-level rise, such that protection of these outer zones from anthropogenic disturbances (for example, harvesting) may slow the rate at which these zones convert to open water.

Keywords

disturbance hydrogeomorphic zone sea-level rise subsidence surface-elevation table vertical accretion wetlands Federated States of Micronesia 

References

  1. Allen JA, Ewel KC, Keeland BD, Tara T, Smith TJIII. 2000. Downed wood in Micronesian mangrove forests. Wetlands 20:169–76.CrossRefGoogle Scholar
  2. Allen JA, Ewel KC, Jack J. 2001. Patterns of natural and anthropogenic disturbance of the mangroves on the Pacific Island of Kosrae. Wetlands Ecol Manage 9:279–89.CrossRefGoogle Scholar
  3. Alongi DM. 2009. The energetics of mangrove forests. New York: Springer.Google Scholar
  4. Alongi DM, Pfitzner J, Trott LA, Tirendi F, Dixon P, Klumpp DW. 2005. Rapid sediment accumulation and microbial mineralization in forests of the mangrove Kandelia candel in the Jiulongjiang Estuary, China. Estuar Coast Shelf Sci 63:605–18.CrossRefGoogle Scholar
  5. Bird ECF. 1971. Mangroves as land-builders. Victorian Nat 88:189–97.Google Scholar
  6. Bird ECF, Barson MM. 1977. Measurement of physiographic changes on mangrove-fringed estuaries and coastlines. Mar Res Indonesia 18:73–80.Google Scholar
  7. Boumans RM, Day JW Jr. 1993. High precision measurements of sediment elevation in shallow coastal areas using a sedimentation-erosion table. Estuaries 16:375–80.CrossRefGoogle Scholar
  8. Cahoon DR, Lynch JC. 1997. Vertical accretion and shallow subsidence in a mangrove forest of southwestern Florida, USA. Mangroves Salt Marshes 1:173–86.CrossRefGoogle Scholar
  9. Cahoon DR, Turner RE. 1989. Accretion and canal impacts in a rapidly subsiding wetland. II. Feldspar marker horizon technique. Estuaries 12:260–8.CrossRefGoogle Scholar
  10. Cahoon DR, Reed D, Day JW Jr. 1995. Estimating shallow subsidence in microtidal salt marshes of the southeastern United States: Kaye and Barghoorn revisited. Mar Geol 128:1–9.CrossRefGoogle Scholar
  11. Cahoon DR, Day JW Jr, Reed DJ. 1999. The influence of surface and shallow subsurface processes on wetland elevation: a synthesis. Curr Top Wetland Biogeochem 3:72–88.Google Scholar
  12. Cahoon DR, Hensel P, Rybczyk J, McKee KL, Proffitt CE, Perez BC. 2003. Mass tree mortality leads to mangrove peat collapse at Bay Islands, Honduras after Hurricane Mitch. J Ecol 91:1093–105.CrossRefGoogle Scholar
  13. Cahoon DR, Hensel P, Spencer T, Reed D, McKee KL, Saintilan N. 2006. Coastal wetland vulnerability to relative sea-level rise: wetland elevation trends and process controls. In: Verhoeven JTA, Beltman B, Bobbink R, Whigham D, Eds. Wetlands and natural resource management. Ecological studies, Vol. 190. Berlin Heidelberg, Germany: Springer-Verlag. p 271–92.CrossRefGoogle Scholar
  14. Childers DL, Sklar F, Drake B, Jordan T. 1993. Seasonal measurements of sediment elevation in three mid-Atlantic estuaries. J Coastal Res 9:986–1003.Google Scholar
  15. Church JA, White NJ, Coleman R, Lambeck K, Mitrovica JX. 2004. Estimates of the regional distribution of sea-level rise over the 1950 to 2000 period. J Clim 17:2609–25.CrossRefGoogle Scholar
  16. Church JA, White NJ, Hunter JR. 2006. Sea-level rise at tropical Pacific and Indian Ocean islands. Glob Planet Change 53:155–68.CrossRefGoogle Scholar
  17. Colasacco N, Schneider R, Eds. 2004. Pacific ENSO update, 1st Quarter 2004, vol. 10, No. 1, Pacific ENSO Applications Center, University of Hawaii at Manoa. Available at http://soest.hawaii.edu.
  18. Cormier N. 2003. Belowground productivity in mangrove forests of Pohnpei and Kosrae, Federated States of Micronesia. M.S. Thesis. Lafayette, Louisiana: University of Louisiana at Lafayette.Google Scholar
  19. Davis JH Jr. 1938. Mangroves-makers of land. Nat Magaz (Nov):551–3.Google Scholar
  20. Drexler JZ, Ewel KC. 2001. Effect of the 1997–1998 ENSO-related drought on hydrology and salinity in a Micronesian wetland complex. Estuaries 24:347–56.CrossRefGoogle Scholar
  21. Ellison J. 2009. Wetlands of the Pacific Island region. Wetlands Ecol Manage 17:169–206.CrossRefGoogle Scholar
  22. Ellison J, Stoddart D. 1991. Mangrove ecosystem collapse during predicted sea-level rise: holocene analogues and implications. J Coastal Res 7:151–65.Google Scholar
  23. Ewel KC, Twilley RR, Ong JE. 1998a. Different kinds of mangrove forests provide different goods and services. Glob Ecol Biogeogr Lett 7:83–94.CrossRefGoogle Scholar
  24. Ewel KC, Bourgeois JA, Cole TG, Zheng S. 1998b. Variation in environmental characteristics and vegetation in high-rainfall mangrove forests, Kosrae, Micronesia. Glob Ecol Biogeogr Lett 7:49–56.CrossRefGoogle Scholar
  25. Ewel KC, Cressa C, Kneib RT, Lake PS, Levin LA, Palmer MA, Snelgrove P, Wall DH. 2001. Managing critical transition zones. Ecosystems 4:452–60.CrossRefGoogle Scholar
  26. Ewel KC, Hauff RD, Cole TG. 2003. Analyzing mangrove forest structure and species distribution on a Pacific island. Phytocoenologia 33:251–66.CrossRefGoogle Scholar
  27. Fujimoto K, Tabuchi R, Mori T, Murofushi T. 1995. Site environments and stand structure of the mangrove forests on Pohnpei Island, Micronesia. Jpn Agric Res Quart 29:275–84.Google Scholar
  28. Fujimoto K, Miyagi T, Kikuchi T, Kawana T. 1996. Mangrove habitat formation and response to Holocene sea-level changes on Kosrae Island, Micronesia. In: Mangroves and salt marshes, Vol. 1. Amsterdam, The Netherlands: SPB Academic Publishing. pp 47–57.Google Scholar
  29. Furakawa K, Wolanski E. 1996. Sedimentation in mangrove forests. In: Mangroves and salt marshes, Vol. 1. Amsterdam, The Netherlands: SPB Academic Publishing. pp 3–10.Google Scholar
  30. Furakawa K, Wolanski E, Mueller H. 1997. Currents and sediment transport in mangrove forests. Estuar Coast Shelf Sci 44:301–10.CrossRefGoogle Scholar
  31. Gilman E, Ellison J, Coleman R. 2007a. Assessment of mangrove response to projected relative sea-level rise and recent historical reconstruction of shoreline position. Environ Monit Assess 124:105–30.CrossRefPubMedGoogle Scholar
  32. Gilman E, Ellison J, Sauni I Jr, Tuaumu S. 2007b. Trends in surface elevations of American Samoa mangroves. Wetlands Ecol Manage 15:391–404.CrossRefGoogle Scholar
  33. Gleason SM, Ewel KC. 2002. Organic matter dynamics on the forest floor of a Micronesian mangrove forest: an investigation of species composition shifts. Biotropica 34:190–8.Google Scholar
  34. Kikuchi T, Mochida Y, Miyagi T, Fujimoto K, Tsuda S. 1999. Mangrove forests supported by peaty habitats on several islands in the western Pacific. Tropics 8:197–205.CrossRefGoogle Scholar
  35. Krauss KW, Allen JA, Cahoon DR. 2003. Differential rates of vertical accretion and elevation change among aerial root types in Micronesian mangrove forests. Estuar Coast Shelf Sci 56:251–9.CrossRefGoogle Scholar
  36. Krauss KW, Doyle TW, Twilley RR, Smith TJIII, Whelan KRT, Sullivan JK. 2005. Woody debris in the mangrove forests of south Florida. Biotropica 37:9–15.Google Scholar
  37. Krauss KW, Keeland BD, Allen JA, Ewel KC, Johnson DJ. 2007. Effects of season, rainfall, and hydrogeomorphic setting on mangrove tree growth in Micronesia. Biotropica 39:161–70.CrossRefGoogle Scholar
  38. Lugo AE, Snedaker SC. 1974. The ecology of mangroves. Annu Rev Ecol Syst 5:39–64.CrossRefGoogle Scholar
  39. MacLean CD, Whitsell CD, Cole TG, McDuffie KE. 1998. Timber resources of Kosrae, Pohnpei, Truk, and Yap, Federated States of Micronesia. Resource Bulletin PSW-24. Berkeley, California: USDA Forest Service.Google Scholar
  40. McKee KL, Cahoon DR, Feller IC. 2007. Caribbean mangroves adjust to rising sea level through biotic controls of change in soil elevation. Glob Ecol Biogeogr 16:545–56.CrossRefGoogle Scholar
  41. Middleton BA, McKee KL. 2001. Degradation of mangrove tissues and implications for peat formation in Belizean island forests. J Ecol 89:818–28.CrossRefGoogle Scholar
  42. Naylor R, Drew M. 1998. Valuing mangrove resources in Kosrae, Micronesia. Environ Dev Econ 3:471–90.CrossRefGoogle Scholar
  43. Reed DJ. 1989. Patterns of sediment deposition in subsiding coastal salt marshes, Terrebonne Bay, Louisiana: the role of winter storms. Estuaries 12:222–7.CrossRefGoogle Scholar
  44. Rogers K, Saintilan N, Cahoon DR. 2005a. Surface elevation dynamics in a regenerating mangrove forest at Homebush Bay, Australia. Wetlands Ecol Manage 13:587–98.CrossRefGoogle Scholar
  45. Rogers K, Saintilan N, Heijnis H. 2005b. Mangrove encroachment of salt marsh in western Port Bay, Victoria: the role of sedimentation, subsidence, and sea level rise. Estuaries 28:551–9.CrossRefGoogle Scholar
  46. Rogers K, Wilton KM, Saintilan N. 2006. Vegetation change and surface elevation dynamics in estuarine wetlands of southeast Australia. Estuar Coast Shelf Sci 66:559–69.CrossRefGoogle Scholar
  47. SAS Institute Inc. 2007. OnlineDoc 9.1.3. Cary, North Carolina: SAS Institute Inc.Google Scholar
  48. Schneider R. Ed. 2003. Pacific ENSO update, 2nd Quarter 2003, Vol. 9, No. 2, Pacific ENSO Applications Center, University of Hawaii at Manoa. Available at http://soest.hawaii.edu.
  49. Scoffin T. 1970. The trapping and binding of subtidal carbonate sediments by marine vegetation in Bimini Lagoon, Bahamas. J Sed Petrol 40:249–73.Google Scholar
  50. Spenceley AP. 1977. The role of pneumatophores in sedimentary processes. Mar Geol 24:M31–7.CrossRefGoogle Scholar
  51. Victor S, Golbuu Y, Wolanski E, Richmond RH. 2004. Fine sediment trapping in two mangrove-fringed estuaries exposed to contrasting land-use intensity, Palau, Micronesia. Wetlands Ecol Manage 12:277–83.CrossRefGoogle Scholar
  52. Victor S, Neth L, Golbuu Y, Wolanski E, Richmond RH. 2006. Sedimentation in mangroves and coral reefs in a wet tropical island, Pohnpei, Micronesia. Estuar Coast Shelf Sci 66:409–16.CrossRefGoogle Scholar
  53. Whelan KRT. 2005. The successional dynamics of lightning-initiated canopy gaps in the mangrove forests of Shark River, Everglades National Park, USA. Ph.D dissertation. Miami, Florida: Florida International University.Google Scholar
  54. Whelan KRT, Smith TJIII, Cahoon DR, Lynch JC, Anderson GH. 2005. Groundwater control of mangrove surface elevation: shrink and swell varies with soil depth. Estuaries 28:833–43.CrossRefGoogle Scholar
  55. Whelan KRT, Smith TJIII, Anderson GH, Ouelette ML. 2009. Hurricane Wilma’s impact on overall soil elevation and zones within the soil profile in a mangrove forest. Wetlands 29:16–23.CrossRefGoogle Scholar
  56. Woodroffe CD. 1987. Pacific island mangroves: distribution and environmental settings. Pac Sci 41:166–85.Google Scholar
  57. Woodroffe CD. 1995. Response of tide-dominated mangrove shorelines in Northern Australia to anticipated sea-level rise. Earth Surf Proc Land 20:65–85.CrossRefGoogle Scholar
  58. Woodward A, Hales S, Weinstein P. 1998. Climate change and human health in the Asia Pacific region: who will be most vulnerable? Climate Res 11:31–8.CrossRefGoogle Scholar
  59. Yamano H, Kayanne H, Yamaguchi T, Kuwahara Y, Yokoki H, Shimazaki H, Chikamori M. 2007. Atoll island vulnerability to flooding and inundation revealed by historical reconstruction: Fongafale Islet, Funafuti Atoll, Tuvalu. Glob Planet Change 57:407–16.CrossRefGoogle Scholar
  60. Young BM, Harvey LE. 1996. A spatial analysis of the relationship between mangrove (Avicennia marina var australasica) physiognomy and sediment accretion in the Hauraki Plains, New Zealand. Estuar Coast Shelf Sci 42:231–46.CrossRefGoogle Scholar

Copyright information

© GovernmentEmployee: U.S. Geological Survey, National Wetlands Research Center 2010

Authors and Affiliations

  • Ken W. Krauss
    • 1
    • 3
  • Donald R. Cahoon
    • 2
  • James A. Allen
    • 1
    • 4
  • Katherine C. Ewel
    • 1
    • 5
  • James C. Lynch
    • 2
  • Nicole Cormier
    • 1
    • 3
  1. 1.USDA Forest ServiceInstitute of Pacific Islands ForestryHiloUSA
  2. 2.U.S. Geological SurveyPatuxent Wildlife Research CenterBeltsvilleUSA
  3. 3.U.S. Geological SurveyNational Wetlands Research CenterLafayetteUSA
  4. 4.School of ForestryNorthern Arizona UniversityFlagstaffUSA
  5. 5.School of Forest Resources and ConservationUniversity of FloridaGainesvilleUSA

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