Allometric equations for estimating standing biomass of Avicennia marina in Bushehr of Iran

Allometric equations for estimating standing biomass of Avicennia marina in Bushehr of Iran Abstract: Today, it is important to use of ecological indicators, such as biomass for recognizing the special status of ecosystems, such as mangrove forests and also monitoring and evaluating changes through a specific period. Because using the direct method of evaluating biomass would be destructive, it is common in all similar area to use determine exact Allometric equations by using the statistical relationship between the structural characteristics of trees and their biomass and use these equations to estimate the biomass of trees. The aim of this study is estimate the aboveground biomass of mangroves and determine Allometric models for Nayband area in Bushehr, located in southern Iran. A number of mangrove trees were randomly selected. Collar diameter, crown diameter and tree height of standing trees were measured. After logging and weighing fresh weight, dry weight, trunk and branches were obtained in laboratory and biomass of components was calculated. The relationship between quantities feature of trees and biomass for determination of allometric equation was studied by using linear, power and exponential regression. The equations were compared with each other based on the different modeling parameters. The highest significant correlation was found between crown diameters and dry weight (R > 0.90). The best equations were obtained by means of an exponential and power regression models (R2adj> 0.90). The models were obtained from explained factor, suggests that there might be a relationship between the characteristics of mangrove trees and biomass. Keywords: Biomass, mangrove, modeling, Iran Iran Busehr Eyaletinde Avicennia marina biyokutle tahmini icin allometrik denklemlerin kullanimi Ozet: Gunumuzde; subasar ormanlari gibi ozel yapidaki ekosistemlerin arastirilmasi icin biyokutle gibi bazi ekolojik gostergelerin kullanilmasi onemlidir. Biyokutlenin hesaplanmasinda dogrudan metodlarin kullanilmasi yikici sonuclar doguracagindan, agaclarin yapisal ozellikleri ve biyokutle arasindaki istatistiki iliskiye dayanan  kesin Allometrik denklemleri kullanarak biyokutleyi tahmin etmek yaygin bir sekilde uygulanmaktadir. Bu calismanin amaci, Iran'in guneyinde yer alan Busehr Eyaleti Nayband bolgesi'ndeki subasar ormanlari yerustu biyokutle miktarinin Allometrik yontemlerle belirlenmesidir. Subasar ormanlarinda agaclar rastgele secilmis, bu agaclarin boyu, gogus capi ve tac genislikleri olculmustur. Kesilen agaclarin taze ve kuru agirliklari olculerek govde ve dallari biyokutlelerinin hesaplanmasi icin laboratuvara tasinmistir. Uygun allometrik denklemin belirlenmesi icin agaclarin ozelligi ve biyokutle arasindaki iliski dogrusal, guc ve ustel regresyon kullanilarak incelenmistir. Denklemler farkli modelleme parametrelerine dayanarak birbirleriyle karsilastirilmistir. En yuksek anlamli iliski tac caplari ve kuru agirlik (R> 0.90) arasinda bulunmustur. En iyi denklemler ustel ve guc regresyon modelleri (R 2 adj > 0.90) vasitasiyla elde edilmistir. Aciklanan gerekcelere dayanilarak kullanilan en uygun modeller; subasar ormanlarinda yetisen agaclarin karakteristikleri ile biyokutle arasinda bir iliski olabilecegini bize dusundurmektredir. Anahtar Kelimeler: Biyokutle, subasar orman, modelleme, Iran Received (Gelis):  15.11.2015 -  Revised (Duzeltme):  29.12.2015 -  Accepted (Kabul):  01.02.2016 Cite (Atif):  Ghasemi, A., Fallah, A., Joibary, S.S., 2016. Allometric equations for estimating standing biomass of Avicennia marina in Bushehr of Iran. Journal of the Faculty of Forestry Istanbul University 66(2): 691-697. DOI: 10.17099/jffiu.23699