SEASONAL FOLIAGE DYNAMICS OF MANGROVE Bruguiera gymnorrhiza (L.) lamk. IN A SUBTROPICAL REGION, MANKO WETLAND, OKINAWA ISLAND, JAPAN

Authors

  • S. Sharma Graduate School of Engineering and Science, University of the Ryukyus, Okinawa, Japan Tel- +81-80-4310-3681, Fax- ++ 94 11 678 9999
  • A.T.M. Rafiqul Hoque Institute of Forestry and Environmental Sciences, Chittagong University, Chittangong, Bangladesh
  • K. Analuddin Department of Biology, Faculty of Mathmatics and Natural Sciences, Haluoleo University, Kendari Indonesia
  • A. Hagihara Faculty of Science, University of the Ryukyus, Okinawa, Japan

DOI:

https://doi.org/10.31357/fesympo.v15i0.197

Keywords:

Crown leaf area, Bruguiera gymnorrhiza, Leaf area growth, Leaf recruitment, litterfall

Abstract

In case of mangroves, little information is available on seasonal crown leaf area growth and leaf survival. Therefore, it is necessary to investigate the dynamics of crown foliage to understand the productivity of mangroves. The present study describes the crown foliage dynamics of  Bruguiera gymnorrhiza (L.) Lamk., Okinawa Island, Japan, which is the northern limit of its distribution. This study was carried out from April 2008 to March 2009. The crown foliage dynamics includes the leaf recruitment and survival. The production and fall of leaves were investigated by a direct observation of a sample tree of B. gymnorrhiza as well as by an indirect observation of litterfall measurement. The numbers of surviving and dying new leaves were totaled monthly. Newly flushed leaves occurred successively throughout the year, with a maximum in July and a minimum in January. The highest leaf death was in June, whereas the lowest was in December. The crown leaf area was almost stable throughout the year, having a peak in December. The homeostatic control of the crown foliage area may also be accompanied by the regulation of leaf recruitment and death. Therefore, the present results suggest the existence of integrated mechanisms between the internal and external factors maintain the crown foliage area

 

Author Biographies

S. Sharma, Graduate School of Engineering and Science, University of the Ryukyus, Okinawa, Japan Tel- +81-80-4310-3681, Fax- ++ 94 11 678 9999

Graduate School of Engineering and Science,

University of the Ryukyus,

Okinawa,

Japan

A.T.M. Rafiqul Hoque, Institute of Forestry and Environmental Sciences, Chittagong University, Chittangong, Bangladesh

Institute of Forestry and Environmental Sciences,

Chittagong University,

Chittangong,

Bangladesh

K. Analuddin, Department of Biology, Faculty of Mathmatics and Natural Sciences, Haluoleo University, Kendari Indonesia

Department of Biology,

Faculty of Mathmatics and Natural Sciences,

Haluoleo University,

Kendari,

Indonesia

A. Hagihara, Faculty of Science, University of the Ryukyus, Okinawa, Japan

Faculty of Science,

University of the Ryukyus,

Okinawa,

Japan

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Published

2012-02-09