Decomposition of Avicennia marina (Forsk.) Vierh. Foliage under field and laboratory conditions in the backwaters of Karachi, Pakistan

Authors

  • Seema Shafique Center of Excellence in Marine Biology, University of Karachi, Karachi-75270
  • Pirzada JA Siddiqui Center of Excellence in Marine Biology, University of Karachi, Karachi-75270
  • RA Aziz Center of Excellence in Marine Biology, University of Karachi, Karachi-75270
  • SS Shaukat Institute of Environmental Studies, University of Karachi, Karachi 75270
  • Z Farooqui Institute of Marine Sciences, University of Karachi, Karachi 75270

DOI:

https://doi.org/10.3329/bjb.v44i1.22716

Keywords:

Avicennia marina, Decomposition, Leaf litter, Mangrove

Abstract

The fate of leaf litter decomposition of Avicennia marina (Forsk.) Vierh. was found higher under field aerobic condition (FAC) while the fate was lowest under laboratory anaerobic condition (LAAC). The time required for the loss of half of the initial day weight (t50) was 48, 55, 98 and 110 days for aerobic condition (AC), field micro-aerobic condition (MAC), laboratory aerobic condition (LAC) and LAAC, respectively. Total nitrogen content of the decomposing litter increased by contrast, total organic carbon decreased during decomposition. Consequently, carbon to nitrogen ratios declined with time during decomposition. Repeated measure design showed that weight loss, total nitrogen and total organic carbon vary significantly under all four conditions with respect to elapsed time (p < 0.001; WilksLambda = 0.02, 0.003, 0.02, respectively at p < 0.001). The study concludes that mangrove litter has an initial rapid phase of decomposition and the variable decay rates depend on the degree of exposure/submergence of litter in water, the pressure of detrivores, and the oxygen level in the given niche of mangrove forest.

DOI: http://dx.doi.org/10.3329/bjb.v44i1.22716

Bangladesh J. Bot. 44(1): 1-7, 2015 (March)

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Published

2015-03-26

How to Cite

Shafique, S., Siddiqui, P. J., Aziz, R., Shaukat, S., & Farooqui, Z. (2015). Decomposition of Avicennia marina (Forsk.) Vierh. Foliage under field and laboratory conditions in the backwaters of Karachi, Pakistan. Bangladesh Journal of Botany, 44(1), 1–7. https://doi.org/10.3329/bjb.v44i1.22716

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Articles