Effects of fiddler crab burrows on sediment properties in the mangrove mudflats of sungai sepang, Malaysia

Mohammad Mokhtari, Mazlan Abd. Ghaffar, Gires Usup, Zaidi Che Cob

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In mangrove ecosystems, litter fall accumulates as refractory organic carbon on the sediment surface and creates anoxic sediment layers. Fiddler crabs, through their burrowing activity, translocate oxygen into the anoxic layers and promote aerobic respiration, iron reduction and nitrification. In this study, the effects of four species of fiddler crabs (Uca triangularis, Uca rosea, Ucaforcipata and Uca paradussumieri) on organic content, water content, porosity, redox potential and solid phase iron pools of mangrove sediments were investigated. In each crab's habitat, six cores down to 30 cm depth were taken from burrowed and non-burrowed sampling plots. Redox potential and oxidized iron pools were highest in surface sediment, while porosity, water and organic content were higher in deeper sediment. Reduced iron (Fe (II)) and redox potential were significantly different between burrowed and non-burrowed plots. Crab burrows extend the oxidized surface layer down to 4 cm depth and through the oxidation effect, reduce the organic content of sediments. The effects of burrows varied between the four species based on their shore location. The oxidation effect of burrows enhance the decomposition rate and stimulate iron reduction, which are processes that are expected to play an important role in biogeochemical properties of mangrove sediments.

Original languageEnglish
Article number7
JournalBiology
Volume5
Issue number1
DOIs
Publication statusPublished - 19 Jan 2016

Fingerprint

Malaysia
burrows
crabs
Brachyura
Sediments
Iron
sediments
Oxidation-Reduction
iron
redox potential
Porosity
Ecosystem
Anoxic sediments
Nitrification
porosity
Water
Oxidation
oxidation
Organic carbon
Respiration

Keywords

  • Bioturbation
  • Multivariate analysis
  • Organic content
  • Principal Component Analysis
  • Sediment oxidation

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)

Cite this

Effects of fiddler crab burrows on sediment properties in the mangrove mudflats of sungai sepang, Malaysia. / Mokhtari, Mohammad; Abd. Ghaffar, Mazlan; Usup, Gires; Che Cob, Zaidi.

In: Biology, Vol. 5, No. 1, 7, 19.01.2016.

Research output: Contribution to journalArticle

Mokhtari, Mohammad ; Abd. Ghaffar, Mazlan ; Usup, Gires ; Che Cob, Zaidi. / Effects of fiddler crab burrows on sediment properties in the mangrove mudflats of sungai sepang, Malaysia. In: Biology. 2016 ; Vol. 5, No. 1.
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