Tree height predictions for black pine plantations using nonlinear mixed-effects modeling

KARATEPE Y., Maden E., ÖZÇELİK R.

Fresenius Environmental Bulletin, cilt.29, sa.6, ss.4556-4565, 2020 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 29 Sayı: 6
  • Basım Tarihi: 2020
  • Dergi Adı: Fresenius Environmental Bulletin
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Environment Index, Geobase, Greenfile, Metadex, Pollution Abstracts, Veterinary Science Database, Civil Engineering Abstracts
  • Sayfa Sayıları: ss.4556-4565
  • Anahtar Kelimeler: Accuracy and precision, Diameter, Height model, Mixed-effects, Plantation
  • Isparta Uygulamalı Bilimler Üniversitesi Adresli: Evet

Özet

Height-diameter relationships are key component in tree and stand volume estimation and stand description and also management tool for forest managers. In this study, height-diameter models were developed for black pine (Pinus nigra Arnold.) plantations in Western Mediterranean Region of Turkey using the Gompertz model. Three alternative methods were evaluated: (1) fixed-effects model, (2) adjusted fixed-effects, and (3) mixedeffects model using two-fold evaluation procedure. Parameters of the adjusted fixed-effects and mixedeffects models were then calibrated using a subset of height measurements, ranging from 1 to 10 sample trees per plot. Evaluation statistics show that the mixed-effects model vastly improved height predictions compared to other models. Model performance improved with increasing sample size to calibration. However, a sample of two trees per plot seemed to be a good compromise between sampling cost and prediction accuracy and precision for Black pine plantations in Mediterranean Region of Turkey.