Methods for monitoring tidal flushing in large animal burrows in tropical mangrove swamps.

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dc.contributor.authorHollins, SEen_AU
dc.contributor.authorHeron, SFen_AU
dc.contributor.authorRidd, PVen_AU
dc.date.accessioned2010-04-06T01:48:32Zen_AU
dc.date.accessioned2010-04-30T05:09:11Zen_AU
dc.date.available2010-04-06T01:48:32Zen_AU
dc.date.available2010-04-30T05:09:11Zen_AU
dc.date.issued2009-05-20en_AU
dc.date.statistics2009-05-20en_AU
dc.description.abstractThe typically anaerobic nature of mangrove sediments provides significant challenges to the mangrove trees and biota inhabiting them. The burrowing activities and flow of water through the numerous and complex animal burrows perforating the sediments of mangroves have a major influence on the biogeochemistry of the sediments and are important to the enhancement of nutrient and oxygen exchange. Two new methods are presented for monitoring the tidal flushing of Sesarma messa and Alpheus cf macklay burrows in a Rhizophora stylosa mangrove forest – by measuring oxygen content of burrow water and by determining the change in fluorescence of a dye tracer through tidal inundation. A case study using the first of these showed oxygen consumption rates at the burrow wall deep within the burrow were found to be between 210 and 460 μmol O2 m−2 h−1. The influx of oxygen during a flood tide was found to be significant and indicated that approximately 40% of the burrow water is flushed during a single tidal event. However, the high consumption rate of oxygen within the burrow resulted in the oxygen concentration remaining at or below one-third of the oxygen content of the flooding tidal water. A test application of the second method, using rhodamine dye as a tracer, indicated that the exchange of water between the burrow and the flooding tide was found to be in the order of 30% of the burrow volume. These new techniques provide a means to further study the nutrient exchange within these burrow systems and verify the initial findings that several tidal inundations are necessary to completely flush the burrows. © 2009, Elsevier Ltd.en_AU
dc.identifier.citationHollins, S. E., Heron, S. F., & Ridd, P. V. (2009). Methods for monitoring tidal flushing in large animal burrows in tropical mangrove swamps. Estuarine, Coastal and Shelf Science, 82(4), 615-620. doi:10.1016/j.ecss.2009.03.007en_AU
dc.identifier.govdoc1591en_AU
dc.identifier.issn0272-7714en_AU
dc.identifier.issue4en_AU
dc.identifier.journaltitleEstuarine, Coastal and Shelf Scienceen_AU
dc.identifier.pagination615-620en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.ecss.2009.03.007en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3039en_AU
dc.identifier.volume82en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectOxygenen_AU
dc.subjectTideen_AU
dc.subjectMangrovesen_AU
dc.subjectQueenslanden_AU
dc.subjectAnimalsen_AU
dc.subjectTunnelsen_AU
dc.titleMethods for monitoring tidal flushing in large animal burrows in tropical mangrove swamps.en_AU
dc.typeJournal Articleen_AU
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