The sediment-water interface increment due to the complex burrows of macrofauna in a tidal flat |
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Authors: | Bon Joo Koo Kae Kyoung Kwon Jung-Ho Hyun |
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Institution: | (1) Marine Ecosystem & Conservation Research Division, KORDI, P.O. Box 29, 425-600 Ansan, Seoul, Korea;(2) Marine Biotechnology & New Material Research Division, KORDI, P.O. Box 29, 425-600 Ansan, Seoul, Korea |
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Abstract: | The architecture of macrofaunal burrows and the total area of the sediment-water interface created by biogenic structure were
investigated in the Donggeomdo tidal flat on the west coast of Korea. Resin casting methods were applied to recover burrows
of four dominant species, Macrophthalmus japonicus, Cleistostoma dilatatum, Perinereis aibuhitensis, and Periserrula leucophryna,
and whole burrows within the casting area at three sites in different tidal levels.P. leucophryna excavated the largest burrow in terms of a surface area among them. In the case of whole burrow casting, the space occupied
by the biogenic structure was extended into deeper and expanded more greatly at the higher tidal level. In the uppermost flat,
the burrow wall surface area within sediment was more extensive than the sediment surface area. Increased oxygen supply through
the extended interface could enhance the degradation rates of organic carbon and also change the pathways of degradation.
Quantifying the relationship between the extended interface and mineralization rate and pathway requires more extensive study. |
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Keywords: | burrow macrofauna sediment-water interface tidal flat |
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