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Proceedings of International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals : Policy and Practice 27-29 June 2016 at the Sirindhorn International Environmental Park, Cha-am, Phetchaburi, Thailand

Monitoring  plant  diversity  and  water  storage  in  a  dry  dipterocarp  forest  at  the  Huai  Hong  Khrai  Royal  Development  Study  Center,  Chiang  Mai, northern  Thailand Teuanchay  PHONGKHAMPHANH1* Soontorn KHAMYONG2 Suparb  PARAMEE3 Niwat  ANONGRAK1 1 Plant  and  Soil  Sciences  Department,  Faculty  of  Agriculture,  Chiang  Mai  University, Thailand,  2 Highland  Agriculture  and  Natural  Resources  Department,  Faculty  of  Agriculture, Chiang  Mai  University 3 Huai  Hong  Khrai  Royal  Development  Study  Center,  Chiang  Mai *Corresponding  author;  E-mail:  pteuanchay@yahoo.com Abstract-Monitoring  plant  species  diversity  and  water  storage  in  a  dry  dipterocarp  forest  (DDF)  at  the Huai Hong Khrai  Royal  Development  Study  (HHKRDS)  Center,  Chiang Mai  province  was  carried  out.  The  forest  was  assessed  for  species  diversity  and  water  storage  in  2010  and  2015  using  12  permanent  plots,  each  of  size  40  x  40  m2,  and  arranged  by  a  random  sampling  over  the  forest  as  reported  in  Part  I.  The  plant  data  were  obtained  by  measuring  stem  girths  at  1.3  m  above  ground  and  heights  of  all  trees  with  height  over  1.5  m.  Quantitative  plant  data,  plant  biomass  and  water  amounts  derived  from  water  contents  in  stem,  branch,  leaf  and  root  were  measured.  The  DDF  included  4  stands  based  on  the  most  dominant  tree  species:  Hiang  (Dipterocapus  obtusifolius),  Pluang  (D.  tuberculatus),  Teng  (Shorea  obtusa)  and  Rang  (S.  siamensis).  It  was  found  that  species  richness,  family  richness,  tree  density  and  species  diversity  index  (SWI)  were  decreased:  60  to  53  species  (-7),  31  to  27  families  (-4),  3,864  to  2,780  trees  ha-1  (-1,084),  and  3.17  to  3.06  (-0.11),  respectively  Death  of  many  tree  individuals  in  the  forest  was  the  main  cause  of  decreasing  species  diversity  and  plant  production. However,  the  Forest  Condition  Index  (FCI)  was  adversely  increased,  and  the  average  amount  of  plant  biomass  was  also  increased  from  83.74±12.35  to  90.65±11.36  Mg  ha-1  (+6.91).  As  a  result,  the  average  amount  of  water  stored  in  plant  biomass  during  2010  and  2015  increased  from  34.02±4.94  to  38.70±5.27  m3  ha-1,  the  net.  increase  of  4.69 m3  ha-1 (13.80%)  or  only  0.94 m3  ha-1  yr-1. Keywords:  dry  dipterocarp  forest,  monitoring,  plant  species  diversity,  water  storage Proceedings  of  the  International  Conference  on  Climate  Change,  Biodiversity  and  Ecosystem  Services  for  the 23 Sustainable  Development  Goals  (SDGs):  Policy  and  Practice  27-29  June  2016,  Cha-am,  Phetchaburi,  Thailand


Proceedings of International Conference on Climate Change, Biodiversity and Ecosystem Services for the Sustainable Development Goals : Policy and Practice 27-29 June 2016 at the Sirindhorn International Environmental Park, Cha-am, Phetchaburi, Thailand
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