TanDEM-X Forest/Non-Forest (FNF) map(s) have been one such data focusing on the status of global forest coverage, which has played an essential role in combating climate change. Although producers carried out verification and comparison analyses, need for accuracy assessments a broader sense creates uncertainties users to approve new data. For this purpose, 50 m FNF maps were exclusively examined visually through 66,000 test grids within 30 geocells selected from temperate, boreal, tropical...

Sustainable management of forest ecosystems requires assessing dynamics and project stand growth yield in order to make strategic decisions. The size–density relationship is one the most important measures quantifying carrying capacity a ecosystem determining appropriate silvicultural In this study, maximum density index (SDImax) was estimated for three common pine species seven different ecological regions across Türkiye. Observations from 14,413 sample plots, including Calabrian (Pinus...

Abstract Recent advances in LiDAR sensors and robotic technologies have raised the question of whether handheld mobile laser scanning (HMLS) systems can allow for performing forest inventories (FIs) without use conventional ground measurement (CGM) techniques. However, reliability such an approach planning applications, particularly non-uniform forests under mountainous conditions, remains underexplored. This study aims to address these issues by assessing accuracy HMLS-derived data based on...

Generalized height (h)–diameter (d) models were developed for Crimean pine stands in the Kastamonu Regional Directorate of Forestry, northwestern Turkey. Nine generalized h-d fitted and evaluated based on data set consisting 2697 measurements obtained from 274 sample plots located three ecoregions studied region. The best results by modified Richards model accounting 93% total variance height–diameter relationship. It is a known fact that relationship can vary ecological conditions,...

Some dynamic site index models based on the generalized algebraic difference approach (GADA) were fitted for Crimean pine (Pinus nigra J.F. Arnold subsp. pallasiana (Lamb.) Holmboe) stands in Taşköprü, Turkey. Data obtained from 132 dominant trees representing wide range of quality region. Nonlinear regression analysis and a second-order continuous-time autoregressive error structure applied. After modeling, evaluated both statistically graphically. The best results with model derived...

Abstract Investigation and numerical determination of the effects ecologically different regions on forest growth are important issues to be considered for sustainable management. In this study, differences in patterns Crimean pine (Pinus nigra subsp. pallasiana [Lamb.] Holmboe) stands among ecoregions located Kastamonu region northwestern Turkey were investigated. For purpose, stand-level models dominant height, number trees, basal area, volume fitted using data from 274 sample plots 293...

Abstract Accurately quantifying stem taper is essential to predict diameter at any given height along the and estimate tree volume for various sections of stem. With increased computing power, semi- nonparamatric methods have been proposed as alternative approaches modelling taper. The main objective this study was assess accuracy predicted four pine hardwood species by nonparametric models. Specifically, generalized additive models (GAM), random forests (RF) regression-enhanced (RERF) were...

Abstract In this study, the effect of pine mistletoe ( Viscum album subsp. austriacum ) on basal area increment Crimean and Scots was investigated. Dendrochronological data were collected from 223 (71 uninfected 152 infected) pines 195 (77 118 located in Kastamonu province Turkey 2014. Infected sample trees classified as light, moderate or severe infection levels. Growth trends loses compared between infected for periods last 10, 20 30 years. addition, status forest stands investigated using...

Aim of study: Information about the diameter distribution a stand is key resource to determine planning strategies, silvicultural treatment options and product variety. In this study, distributions Fagus orientalis Libsky stands located in Karabük region were researched, relationship between parameters Weibull function variables was investigated. Area Data used study obtained from pure Oriental beech (Fagus Libsky) region, north-central Turkey. Material methods: For sixty-two sample plots...

ABSTRACTStem taper models are helpful tools for predicting diameter of a tree at any height or volume stem section. In this study, traditional and artificial neural network (ANN) approaches were used to predict tapers Scots pine individuals. The data in study correspond destructively sampled trees even-aged forest stands located the three important locations where grows naturally northwestern Türkiye. total, regression type from different categories an ANN model developed evaluated both...

Bu çalışma kapsamında, Safranbolu Orman İşletme Müdürlüğü sınırları içerisinde yayılış gösteren Kazdağı Göknarı (Abies nordmanniana subsp. equi-trojani) meşcereleri için kabuklu ve kabuksuz olmak üzere tek çift girişli ağaç hacim denklemleri geliştirilmiştir. Çalışma materyali olarak, farklı meşcere yapılarından alınan 153 adet örnek ağaca ilişkin gövde değerlerinden faydalanılmıştır. Kabuklu tahminleri 5 10 denkleminin geliştirildiği çalışmada en başarılı denklemlerin belirlenmesi...

Aim of study: In this study, relationships between ecological factors including topography, climate, soil properties and site productivity Crimean pine (Pinus nigra J.F. Arnold subsp. pallasiana (Lamb.) Holmboe) stands in the Kastamonu region Türkiye were investigated. Area The study was conducted region, northwestern Türkiye. Material method: A total thirty-six temporary sample plots inventoried from naturally regenerated pure used study. Main results: Our results indicated that climatic...

Bu çalışma kapsamında, Kastamonu ve Sinop Bölge Müdürlükleri sınırları içerisindeki üç farklı ekorejyonda yayılış yapan doğal saf Karaçam (Pinus nigra subsp. pallasiana (Lamb.) Holmboe) meşcerelerine ilişkin çap dağılımları incelenmiş modellenmiştir. Çalışma materyali olarak 274 adet örnek alan verisinden faydalanılmış her bir alanın dağılımlarının modellenmesi amacıyla beş olasılık yoğunluk fonksiyonuna (Johnson SB, Gamma-2p, Gamma-3p, Weibull-2p Weibull-3p) parametre tahminleri...

Aim of study: Land use and carbon stock changes Alara Forest Planning Unit (FPU) between the years 1997 2017 were investigated.
 Area Alanya Enterprise (FE) within boundaries Antalya province, southwest Turkey.
 Material methods: Data obtained from forest management plans for periods 1997-2006, 2008-2017 2018-2037 used in study. Biomass conversion expansion factors (BCEF), root to shoot ratios (R) (CF) estimation.
 Main results: Total area FPU decreased 7497 ha 7344 ha, while...

In this study, the effects of white mistletoe (Viscum album subsp. abietis (Wiesb.) Abromerit) on diameter increment in Kazdağı fir (Abies nordmanniana equi-trojani (Asc. & Sint. ex Boiss.) Coode Cullen) stands distributed Kastamonu region Turkey were investigated. For purpose, a total 183 sample trees (77 healthy (uninfected) and 106 infected) selected from mistletoe-infected stands. Mistletoe infected classified according to intensity groups as lightly-, moderately- heavily-infection...

Bu çalışmada, Kastamonu Orman Bölge Müdürlüğü sınırları içerisinde yayılış gösteren saf ve doğal karaçam (Pinus nigra J.F.Arnold subsp. pallasiana (Lamb.) Holmboe) meşcereleri için tek çift girişli kabuklu kabuksuz ağaç hacim denklemlerinin geliştirilmesi amaçlanmıştır. Araştırma materyali olarak farklı sıklık, yaş verim gücündeki meşcerelerden alınan 227 örnek ağaca ilişkin gövde hacmi değerlerinden yararlanılmıştır. Çalışma kapsamında, tahminleri ayrı olmak üzere 7 adet 12 denklem...