Pollen in sediments drilled from the Innisfail coastal plain, northeast Queensland, Australia, was examined to reconstruct the evolution of Holocene wetlands in a wet-tropical environment. In contrast to monsoonal Australia, stable environmental conditions created by year-round rainfall and low tidal range caused abrupt, unidirectional transitions in wetland zonation as marine influence changed. This has enabled a detailed reconstruction of the marine transgression and subsequent progradation. Mangroves colonized in response to marine transgression at c. 7400 BP, as riverine mangroves of low salt tolerance migrated up the Mulgrave River. These were replaced around 7000 BP by extensive Rhizophora-dominated mangroves, coinciding with the development of a Rhizophora-dominated community in Wyvuri embayment. Mangroves reached their greatest extent as sea-level rise slowed towards 6000 BP, with a stillstand indicated by a brief return to terrestrial conditions at one site. High freshwater input depressed salt intrusion in the upper reaches of the Mulgrave estuary and prevented the development of hypersalinity in the upper tidal zone. Drainage conditions then controlled whether mangroves were succeeded by freshwater swamp or swamp-forest.
Bunt, J.S. and Williams, W.T.1982: Studies in the analysis of data from Australian tidal forests ('mangroves'). I. Vegetational sequences and their graphic representation . Australian Journal of Ecology5, 385-90.
2.
Bunt, J.S., Williams, W.T. and Bunt, E.D.1985: Mangrove species distribution in relation to tide at the seafront and up rivers. Australian Journal of Marine and Freshwater Research36, 481-92.
3.
Bunt, J.S., Williams, W.T. and Duke, N.C.1982: Mangrove distributions in northeast Australia. Journal of Biogeography9, 111-20.
4.
Chappell, J. and Grindrod, J.1985: Pollen analysis: a key to past mangrove communities and successional changes in North Australian coastal environments. In Bardsley, K.N., Davie, J.D.S. and Woodroffe, C.D., editors, Coasts and tidal wetlands of the Australian monsoon region . Darwin: NARU, 225-36.
5.
Chappell, J. and Ward, P.1985: Seasonal tidal and freshwater chemistry of the South Alligator and Daly Rivers. In Bardsley, K.N., Davie, J.D.S. and Woodroffe, C.D., editors, Coasts and tidal wetlands of the Australian monsoon region. Darwin: NARU, 97-108.
6.
Clark, R.L. and Guppy, J.C.1988: A transition from mangrove forest to freshwater wetland in the monsoon tropics of Australia. Journal of Biogeography15, 665-84.
7.
Crowley, G.M., Anderson, P., Kershaw, A.P. and Grindrod, J.1990: Palynology of a Holocene marine transgressive sequence, lower Mulgrave River valley, north-east Queensland. Australian Journal of Ecology15: 231-40.
8.
Crowley, G.M., Grindrod, J. and Kershaw, A.P.1994: Modem pollen rain in the tropical lowlands of northeast Queensland, Australia. Review of Palaeobotany and Palynology83: 299-327.
9.
Easton, A.K.1970: The tides of the continent of Australia. Research Paper 37. Horace Lamb Centre for Oceanographic Research.
10.
Faegri, K. and Iversen, J.1975: Textbook of pollen analysis, third edition. Oxford: Blackwell Scientific Publications.
11.
Gagan, M.K.1990: Terrigineous sedimentation and the geologic impact of Cyclone Winifred, Innisfail Area, Central Great Barrier Reef Province. PhD thesis, James Cook University of North Queensland, Townsville.
12.
Gagan, M.K., Johnson, D.P. and Crowley, G.M.1994: Sea level control of stacked late Quaternary coastal sequences, central Great Barrier Reef. Sedimentology41: 329-51.
13.
Galloway, R.W.1982: Distribution and physiographic patterns of Australian mangroves. In: Clough, B.F., editor, Mangrove ecosystems in Australia: structure, function and management . Canberra: Australian National University Press, 31-54.
14.
Grindrod, J.1985: The palynology of mangroves on a prograded shore, Princess Charlotte Bay, North Queensland, Australia. Journal of Biogeography12: 323-48.
15.
— 1988: Holocene mangrove history of the South Alligator river estuary, Northern Territory, Australia. PhD thesis, Australian National University.
16.
Grindrod, J. and Rhodes, E.G.1984: Holocene sea-level history of a tropical estuary, Missionary Bay, North Queensland. In Thom, B.G., editor, Coastal geomorphology in Australia. New York: Academic Press, 151-78.
17.
Jennings, J.N.1975: Desert dunes and estuarine fill in the Fitzroy estuary (north-western Australia). Catena2, 215-62.
18.
Kershaw, A.P. and Nix, H.A.1989: The use of bioclimatic envelopes for estimation of quantitative palaeoclimatic values. In Donnelly, T.H. and Wasson R.J., editors, Climanz 3: Proceedings of the Third Symposium on the Late Quaternary Climatic History of Australasia. Melbourne , 78-85.
19.
Macnae, W.1966: Mangroves in eastern and southern Australia. Australian Journal of Botany14, 67-104.
20.
Nix, H.A. and Kahna, J.D.1972: Climate as a dominant control in the biogeography of northern Australia and New Guinea. In Walker, D., editor, Bridge and barrier: the natural and cultural history of the Torres Strait. Canberra: Department of Biogeography and Geomorphology Publication BG/3, ANU, 61-92.
21.
Pickard, G.L.1977: A review of the physical oceanography of the Great Barrier Reef and western Coral Sea. Australian Institute of Marine Science Monograph Series2, 63-120.
22.
Schulmeister, J.1992: A Holocene pollen record from lowland tropical Australia . Holocene2, 107-16.
23.
Stuiver, M. and Polach, H.A.1977: Discussion: Reporting of 14C data. Radiocarbon19, 335-63.
24.
Thom, B.G.1982: Mangrove ecology - a geomorphological perspective . In Clough, B.F., editor, Mangrove ecosystems in Australia- structure, function and management. Canberra: Australian Institute of Marine Sciences with Australian National University Press, 3-17.
25.
Thom, B.G., Wright, L.D. and Coleman, J.M.1975: Mangrove ecology and deltaic-estuarine geomorphology; Cambridge Gulf - Ord River, Western Australia. Journal of Ecology63, 203-32.
26.
Tracey, J.G.1982: The Vegetation of the humid tropical region of North Queensland. Australia: CSIRO.
27.
Tracey, J.G. and Webb, LJ1975: Vegetation of the humid tropical region of North Queensland. Map Series. Indooroopilly: CSIRO.
28.
Trumbore, S.E. (1993) Comparisons of carbon dynamics in tropical and temperate soils using radiocarbon measurements. Global Bio-geochemical Cycles7, 275-90.
29.
Woodroffe, C.D. (1993) Late Quaternary evolution of coastal and lowland riverine plains of Southeast Asia and northern Australia: an overview. Sedimentary Geology83, 163-75.
30.
Woodroffe, C.D., Chappell, J.M.A., Thom, B.G. and Wallensky, E.1986: Geomorphological dynamics of the South Alligator tidal river and plains, Northern Territory. ANU/NARU Mangrove Monograph 3. 190 pp.
31.
Woodroffe, C.D., Mulrennan, M.E. and Chappell, J.1993: Estuarine infill and coastal progradation, southern van Diemen Gulf, northern Australia. Sedimentary Geology83, 257-75.
32.
Woodroffe, C.D., Thom, B.G. and Chappell, J.M.A.1985: Development of widespread mangrove swamps in mid-Holocene times in northern Australia. Nature317, 711-3.
