Ecoregional height–diameter models for Scots pine in Turkiye

SAĞLAM, Fadime; SAKICI, Oytun Emre

doi:10.1007/s11676-024-01757-z

Ecoregional height–diameter models for Scots pine in Turkiye

Yazarlar (2)

Doç. Dr. Fadime SAĞLAM Kastamonu Üniversitesi, Türkiye

Doç. Dr. Oytun Emre Sakıcı Kastamonu Üniversitesi, Türkiye

Makale Türü	Özgün Makale (SSCI, AHCI, SCI, SCI-Exp dergilerinde yayınlanan tam makale)
Dergi Adı	Journal of Forestry Research (Q1)
Dergi ISSN	1007-662X Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler	SCI-Expanded
Makale Dili	İngilizce	Basım Tarihi	06-2024
Cilt / Sayı / Sayfa	35 / 1 / 103–0	DOI	10.1007/s11676-024-01757-z
Makale Linki	https://link.springer.com/article/10.1007/s11676-024-01757-z#citeas

Özet

AbstractEcoregion-based height-diameter models were developed in the present study for Scots pine (Pinus sylvestris L.) stands in Turkiye and included several ecological factors derived from a pre-existing ecoregional classification system. The data were obtained from 2831 sample trees in 292 sample plots. Ten generalized height–diameter models were developed, and the best model (HD10) was selected according to statistical criteria. Then, nonlinear mixed-effects modeling was applied to the best model. The R2 for the generalized height‒diameter model (Richards function) modified by Sharma and Parton is 0.951, and the final model included number of trees, dominant height, and diameter at breast height, with a random parameter associated with each ecoregion attached to the inverse of the mean basal area. The full model predictions using the nonlinear mixed-effects model and the reduced model (HD10) predictions were compared using the nonlinear sum of extra squares test, which revealed significant differences between ecoregions; ecoregion-based height–diameter models were thus found to be suitable to use. In addition, using these models in appropriate ecoregions was very important for achieving reliable predictions with low prediction errors.

Anahtar Kelimeler

Ecoregion | Nonlinear mixed-effects modelling | Nonlinear sum of extra squares method | Scots pine | Tree height

BM Sürdürülebilir Kalkınma Amaçları

Atıf Sayıları
Web of Science	4
Scopus	4
Google Scholar	9

Ecoregional height–diameter models for Scots pine in Turkiye

Dergi Adı	JOURNAL OF FORESTRY RESEARCH
Yayıncı	Springer Nature
Açık Erişim	Hayır
ISSN	1007-662X
E-ISSN	1993-0607
CiteScore	8,9
SJR	0,827
SNIP	1,396

Ecoregional height–diameter models for Scots pine in Turkiye

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