Growth and Biomass in Response to Salinity and Subsequent Fresh Water in Mangrove Seedlings Avicennia marina and Rhizophora stylosa

  • Mohammad Basyuni Department of Forestry, Faculty of Agriculture, University of Sumatera Utara, Medan 20155, Indonesia
  • Lollie Agustina Pancawaraswati Putri Department of Agroecotechnology, Faculty of Agriculture, University of Sumatera Utara, Medan 20155, Indonesia
  • Berliana Nainggolan Department of Forestry, Faculty of Agriculture, University of Sumatera Utara, Medan 20155, Indonesia
  • Putri Ester Sihaloho Department of Forestry, Faculty of Agriculture, University of Sumatera Utara, Medan 20155, Indonesia
Keywords: mangrove zonation, re-adaptation, rehabilitation, salt stress, water stress

Abstract

The present study describes the growth and biomass of salt secretor mangrove, Avicennia marina and the non-secretor Rhizophora stylosa by long-term exposure to salinity and its subsequent fresh water. The seedlings of the 2 mangroves grown with varying salt concentration for 3 months were then divided into 2 treatment groups, and grown for another 3 months: 1 continuously in salinity conditions and another in fresh water to recover from salinity. The growth parameter namely plant height and diameter of A. marina was significantly enhanced by salt with maximal stimulation at 2% (equal to 75% natural seawater) and this increase appeared to be attenuated by increasing the salinity concentration above 2%. By contrast, the growth of R. stylosa significantly thrived up to 0.5% salt concentration, then decreased with the increasing of salinity. The growth of both species slightly increased after removal to salinity. Our findings suggested that within the range of salinity treatments, A. marina was more salt tolerant than R. stylosa, which provides important information for mangrove rehabilitation in North Sumatra. The biomass of the 2 mangrove seedlings was changed in the same manner as the growth of plants upon salt and fresh water treatment. These results suggested the importance of mangrove adaptation withstand salt and/or water stress.
Published
2014-04-29
How to Cite
Basyuni, M., Putri, L. A. P., Nainggolan, B., & Sihaloho, P. E. (2014). Growth and Biomass in Response to Salinity and Subsequent Fresh Water in Mangrove Seedlings Avicennia marina and Rhizophora stylosa. Jurnal Manajemen Hutan Tropika, 20(1), 17-25. Retrieved from http://journal.ipb.ac.id/index.php/jmht/article/view/7925
Section
Articles