Abstract
The effects of the reed,Phragmites australis (Trin.), growing in a brackish water lagoon, were studied in relation to the grain-size distribution of the substratum. At the salt marshes near the lagoon, the upper soils from the surface to a depth of 20 cm contained much silt-clay. These fine particles were found to be transferred from the river and fish ponds near the lagoon, and to be deposited when the tidal rhythm changed, that is, when the water current stopped. In addition, the fine particles, which were deposited on the bottom of the lagoon adjacent to the marshes, became resuspended as a result of wind-caused wave action, and then were transported and redeposited in the salt marshes at the flood tide. Since the reeds further reduced the water current caused by the waves and tide, the reeds were thought to promote redeposition of the resuspended matter. In other words, the reeds were considered to protect deposited and redeposited particles such as silt and clay from resuspension as a result of wave action by reducing the effects of waves and wind. These processes suggested that silt-clay will become abundant in the substratum of the salt marsh adjacent to the lagoon.
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References
Bertness, M.D. (1984): Ribbed mussels andSpartina alterniflora production in a New England salt marsh. Ecology,65, 1794–1807.
Brereton, A.J. (1971): The structure of the species population in the initial stages of salt-marsh successions. J. Ecol.,59, 321–338.
Dykyjova, D. and D. Hradecka (1976): Production ecology ofPhragmites communis: 1. Relation of two ecotypes to the microclimates and nutrient conditions of habitat. Folia Geobot. Phytotaxon.,11, 23–61.
Haslam, S.M. (1972): Biological flora of the British Isles:Phragmites communis Trin. J. Ecol.,60, 585–610.
Kikuchi, E., K. Hanawa and Y. Kurihara (1980): Some problems on the preservation of estuary with special reference to ecology of Gamô Lagoon. Jap. J. Limnol.,41, 117–123 (in Japanese).
Kurihara, Y. (1980): Tidal flat is alive: Iwanamishoten, Tokyo, Japan, 108–120 pp. (in Japanese).
Postma, H. (1968): Sediment transport and sedimentation in the estuarine environment. p. 158–179.In: Estuaries, ed. by G.H. Lauff, American Association for the Advancement of Science, Washington, U.S.A.
Redfield, A.C. (1972): Development of a New England salt marsh. Ecol. Monogr.,42, 201–237.
Takeda, S. and Y. Kurihara (1987): The distribution and abundance ofHelice tridens (De Haan) burrows and substratum conditions in a northeastern Japan salt marsh (Crustacea: Brachyura). J. Exp. Mar. Biol. Ecol.,107, 9–19.
Tsuchiya, M. and Y. Kurihara (1976): Studies on the distribution of macrobenthos with special reference to the movement of the fine particles at Gamô Lagoon, Miyagi Prefecture. Physiol. Ecol. Japan,17, 145–151 (in Japanese).
Tsuchiya, M. and Y. Kurihara (1979): The feeding habits and food sources of the deposit-feeding polychaete,Neanthes japonica (Izuka). J. Exp. Mar. Biol. Ecol.,36, 79–89.
Uehara, T. (1986): The ecological studies on the changes of water current and suspended solids in the river-mouth region. p. 55–66 (in Japanese).In: Evaluation and control of the environmental functions in estuarine, coastal and paddy field ecosystems, ed. by Y. Kurihara, Merin-sha, Sendai, Japan.
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Takeda, S., Kurihara, Y. The effects of the reed,Phragmites australis (Trin.), on substratum grain-size distribution in a salt marsh. Journal of the Oceanographical Society of Japan 44, 103–112 (1988). https://doi.org/10.1007/BF02302617
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DOI: https://doi.org/10.1007/BF02302617