Neşat Erkan - Academia.edu (original) (raw)

Papers by Neşat Erkan

Ormancılık Araştırma Dergisi, 2022

Some of the afforestation done by the forestry organization in Turkey are carried out in areas wh... more Some of the afforestation done by the forestry organization in Turkey are carried out in areas where there is water shortage in summer. Cedar and black pine are used for afforestation in these areas due to their ecological features. Regardless of the purpose of the afforestation, obtaining the expected benefit from these areas largely depends on the afforestation success and growth performance. In this study, long-term growth performance and carbon sequestration of the afforestations done with cedar and black pine in other areas than the natural habitat were investigated. The study was carried out in the afforestation areas around Elazığ and Malatya. Evaluations were based on measurements made in 1996, 2006 and 2018 in 7 permanent sample plots established in 1996 with cedar and black pine. Yield parameters and carbon sequestration were calculated in the sample plots. In the last measurement time, at the end of vejetationperiod of 2018, the average volume increases were determined as 2.24-3.88 and 4.07-11.67 m 3 ha-1 yr-1 and carbon sequestration were determined as 1.05-1.83 and 1.57-4.49 t ha-1 yr-1 for cedar and black pine stands for the ages of 46-48 and 45-51, respectively. It was found out from the growth analysis for both species that they perform similar to the natural habitat, so that these afforestations provide the objectives based on both carbon sequestration and other functions.

Ormancılık Araştırma Dergisi, 2020

Ülkemizde orman endüstrisinin ihtiyaç duyduğu odun hammaddesinin karşılanması konusu, uzun yıllar... more Ülkemizde orman endüstrisinin ihtiyaç duyduğu odun hammaddesinin karşılanması konusu, uzun yıllardır gündemdeki önemini korumaktadır. Özellikle özel sektör tarafından yapılacak endüstriyel ağaçlandırma yatırımlarında, girişimin ekonomik sonuçlarının ne olacağı ve kurulan plantasyonların hangi idare süresiyle işletilmesi gerektiği konularının, bilimsel çalışmalarla ortaya konması gerekmiştir. Bu çalışmada, Endüstriyel Ağaç Tarımı Sanayi ve Ticaret A. Ş. (ENAT) tarafından Bursa-Karacabey'de Sahilçamı ile yapılmış 493 ha büyüklüğündeki ağaçlandırma sahası örnek alınarak değerlendirilmiştir. Çalışma, ağaçlandırma alanının değişik bölgelerinden alınan 15 adet deneme sahasındaki tek ağaca dayalı gövde analizleri ve alan bazında yapılan hasılat ölçmeleri temel alınarak yapılmıştır. Ekonomik analizler için İç Karlılık Oranı Kriteri kullanılmıştır. Elde edilen sonuçlar, Karacabey Sahilçamı ağaçlandırma alanının beşli sınıflamaya göre I. ve II. bonitet alanlarından oluştuğunu, çoğunluğu 12 yaşında olan sahada bu yaşta ortalama artımın 20 m 3 /yıl a kadar çıkabildiğini göstermiştir. Yapılan iç karlılık analiz sonuçları, değişik arazi edinme ve kullanım stratejilerine göre değişmekle birlikte, yatırım sahasında hesaplanan iç karlılık oranlarının % 12,263'e kadar ulaştığını göstermektedir. Özellikle kullanılma olasılığı en yüksek strateji olan tahsisli araziler Sahilçamı ile ağaçlandırma yapılması durumunda iç karlılık oranının 16 yıl idare süresi için % 11,183'e kadar yükseldiği gözlenmiştir. Diğer önemli bir bulgu ise, analizi yapılan 6 değişik stratejiden 5'i için, iç karlılık oranına göre idare süresinin 15 ve 16 yıl olmasıdır.

Ormancılık Araştırma Dergisi, 2018

Introdução: A hospitalização infantil pode desenvolver na criança e família sentimentos confusos ... more Introdução: A hospitalização infantil pode desenvolver na criança e família sentimentos confusos e dicotômicos como, por exemplo, morte e cura, tristeza e alegria, medo e confiança, tornando o hospital um ambiente de experiências dolorosas e de grande relevância para toda a vida, por isso a importância de os profissionais de enfermagem desenvolver estratégias que minimizem estes sentimentos. Objetivo: Conhecer as estratégias utilizadas pelos profissionais da enfermagem para abordar a criança hospitalizada. Método: Estudo descritivo e exploratório, com abordagem qualitativa, realizado no período de junho a dezembro de 2015 na pediatria de um Hospital Escola do Sul do Rio Grande do Sul/Brasil, com oito profissionais da equipe de enfermagem, sendo três enfermeiros e cinco técnicos de enfermagem. O estudo teve aprovação do

African Journal of Agricultural Research, Oct 5, 2011

One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the... more One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the coastal Mediterranean Region of Turkey is pine processionary moth (PPM), Thaumetopoea wilkinsoni Tams. The larvae of PPM feed on needles of Turkish red pine and on some other Mediterranean conifers such as cedar. This study covers the impact of defoliation caused by PPM on growth of red pine. Three test sites were taken on different plantations in the coastal Mediterranean region of Turkey, near Antalya city. The heights and diameters at breast height (dbh) of individual trees both in the control group and the treatment groups were measured. The trees defoliated over 40% in the test sites were considered as the treatments. The results indicated that, compared to the control, the losses in defoliated trees in terms of dbh increment were 55, 50 and 35% in the three test sites, respectively. The corresponding losses in the three test sites in terms of volume increment were 44, 37 and 17%, respectively. Test results also showed that effects of defoliation and site on both diameter and volume increment were statistically significant at 0.000 probability level.

Biotechnology Letters TEST, 2005

Page 1. Ramzi Touchan Æ Elena Xoplaki Æ Gary Funkhouser Ju¨rg Luterbacher Æ Malcolm K. Hughes Æ N... more Page 1. Ramzi Touchan Æ Elena Xoplaki Æ Gary Funkhouser Ju¨rg Luterbacher Æ Malcolm K. Hughes Æ Nesat Erkan U¨nal Akkemik Æ Jean Stephan ... Most studies are recent (Akkemik 2000; Akkemik and Aras 2005; Akkemik et al. ...

DOI : 10.26650/ forestist.2018.330657 Bu calismanin amaci, Turkmen Dagi (Eskisehir, Kutahya) Bolg... more DOI : 10.26650/ forestist.2018.330657 Bu calismanin amaci, Turkmen Dagi (Eskisehir, Kutahya) Bolgesi saricam (Pinus sylvestris L. subsp. hamata (Steven) Fomin.) ormanlarinda agac bilesenlerine ait karbon yogunluklari ile bazi mescere ve yetisme ortami ozellikleri arasindaki iliskileri belirlemektir. Orneklemeler farkli yetisme ortami ozelliklerine sahip 58 alanda yapilmistir. Elde edilen veriler varyans ve korelasyon analizleri ile degerlendirilmistir. Alti agac bileseninin karbon yogunluklari arasinda istatistik bakimdan onemli farkliliklar bulunmustur (p<0,001). Karbon yogunlugu en dusuk kokte (%50,94), en yuksek ise kabukta (%54,75) bulunmustur. Saricam ormanlari icin agirlikli karbon orani %52,37 olarak hesaplanmistir. Agac bilesenlerine ait karbon yogunluklari ile bazi mescere ve yetisme ortami ozellikleri arasinda onemli iliskiler tespit edilmistir. Bonitet endeksi ve yukselti ile agac bilesenleri karbon oranlari arasinda negatif iliski bulunmustur. Ancak yukselti ile bir v...

Ormancılık Araştırma Dergisi, 2020

Ormancılık Araştırma Dergisi, 2017

Özet: Türbelerin ziyaret geleneği ve ağaç kültü gibi inanç ritüelleri Anadolu'nun farklı yöre... more Özet: Türbelerin ziyaret geleneği ve ağaç kültü gibi inanç ritüelleri Anadolu'nun farklı yörelerinde binlerce yıldır varlığını sürdürmektedir. Muğla İli'nin Fethiye İlçesi'ne bağlı Yaka Köyü'nün bir mahallesi olan Türbe Yerleşimi'ne gerçekleşen ziyaretler, bu yerleşimdeki ulu ağaçtan dilek dileme ve şifa bulma amacıyla yapılan ritüeller bu geleneklerin sürdürüldüğü örneklerdendir. 2011 yılında bir TÜBİTAK projesi kapsamında başlatılan araştırmalar ile Türbe Mahallesi'ndeki tarihi kalıntıların çizim ve belgeleme çalışmaları yapılarak ulaşılan veriler Coğrafi Bilgi Sistemine aktarılmıştır. Tarihi kalıntıların dönemi tam olarak bilinmemekle beraber ulaşılan bazı sonuçlar yardımıyla bunların Türkmen Boyları'ndan Menteşeoğulları Beyliği'ne ait olabileceği düşünülmektedir. Proje kapsamında ayrıca tarihi kalıntıların içinde ve yakınında bulunan 3 adet Cupressus sempervirens var. horizantalis (servi) ağacının yaş tespitine yönelik çalışma da yapılmış ve en ya...

İstanbul Üniversitesi Orman Fakültesi Dergisi, 2017

This study was aimed to determine the annual organic carbon stocks in forest floor and soil in Sc... more This study was aimed to determine the annual organic carbon stocks in forest floor and soil in Scots pine (Pinus sylvestris L. subsp. hamata (Steven) Fomin.) forests. Research was conducted with two samplings in 2003 and 2013 on massive of Türkmen Mountains (Eskişehir, Kütahya) where located in West Central Anatolia Region in Turkey. Samplings were performed in 40 plots at pole (dbh=11.0-19.9 cm) and small tree (dbh=20.0-35.9 cm) development stages on different aspects, elevation, slope degree and slope positions. Data were evaluated with pairedsamples t test. Soil organic carbon stocks show a significant (P<0.001) difference despite carbon stock in forest floor has not significant (P>0.05) difference between 2003 and 2013. Depending on these differences, accumulated carbon stocks were 2.88 Mg C ha-1 yr-1 in soil and 0.02 Mg C ha-1 yr-1 in forest floor.

CATENA, 2021

Abstract Land use and land use change are factors that affect carbon and nutrient stocks in ecosy... more Abstract Land use and land use change are factors that affect carbon and nutrient stocks in ecosystems. The aim of this research was to determine the effects of forest land use types on carbon pools and soil and forest floor features. This study was conducted in areas afforested with black pine (Pinus nigra Arn. subsp. pallasiana Lamb. Holmboe) and Scots pine (Pinus sylvestris L.) and on adjacent bare land within the Akdag Nature Park, which is located in the West-Central Anatolia Region of Turkey. Three 20 × 20 m sample plots were selected within each forest land use, and the diameters at breast height and heights of all trees were measured. Tree biomass and carbon stocks in the unit areas were calculated using tree biomass equations, and carbon conversion factors were developed for two tree species. Within each sample plot, disturbed and core soil samples and forest floor samples were taken at three points at depths of 0–10, 10–20 and 20–30 cm. The physical and chemical properties of the soil and forest floor samples were determined in the laboratory and measurements were converted to a unit area using volume values. The data were evaluated using independent sample t-tests and analysis of variance. The results showed that the ecosystem carbon (C) stocks differed significantly with forest land use type; black pine plantations, Scots pine plantations and bare land accumulated 235.2 t C ha−1, 206.1 t C ha−1 and 37.4 t C ha−1, respectively. We found that in addition to the positive effect of afforestation on soil, black pine had a greater impact on some forest floor and soil characteristics in the region than Scots pine. Thus, we suggest that priority should be given to black pine in afforestation of the region and in other ecosystems with similar climates. Additionally, our results reveal the importance of afforestation on bare lands for reducing the impact of global climate change.

Journal of the Faculty of Forestry Istanbul University, 2002

Croatian Journal of Forest Engineering : Journal for Theory and Application of Forestry Engineering, 2016

Pruning is a technique used to add value to trees growing in forest stands, allowing the formatio... more Pruning is a technique used to add value to trees growing in forest stands, allowing the formation of clear, knot-free wood. Although many factors affect timber value, knots are the primary cause of reduction in timber quality of conifers. On the other hand, pruning may also cause reduction in the rate of tree growth, depending on pruning intensity.The aim of this study is to assess the effects of different pruning intensities on DBH (diameter at breast height) growth of young Pinus brutia plantations. For this purpose, three field experimental sites each with different site qualities, were established in three different locations. Four different treatments were applied at each test site: 1) control, no pruning of branches, 2) pruning up to 25% of tree height, 3) pruning up to 50% of tree height, and 4) pruning up to 75% of tree height. The effects of pruning on DBH growth were observed over a period of 14 years. At »Bük« test site, which has the poorest site quality, only those spe...

Pruning is a technique used to add value to trees growing in forest stands, allowing the formatio... more Pruning is a technique used to add value to trees growing in forest stands, allowing the formation of clear, knot-free wood. Although many factors affect timber value, knots are the primary cause of reduction in timber quality of conifers. On the other hand, pruning may also cause reduction in the rate of tree growth, depending on pruning intensity.The aim of this study is to assess the effects of different pruning intensities on DBH (diameter at breast height) growth of young Pinus brutia plantations. For this purpose, three field experimental sites each with different site qualities, were established in three different locations. Four different treatments were applied at each test site: 1) control, no pruning of branches, 2) pruning up to 25% of tree height, 3) pruning up to 50% of tree height, and 4) pruning up to 75% of tree height. The effects of pruning on DBH growth were observed over a period of 14 years. At »Bük« test site, which has the poorest site quality, only those specimens pruned up to 75% of tree height showed significant reduction in DBH growth compared to the control. However, at »Nebiler« and »Kursunlu« test sites, specimens pruned both up to 50% and 75% of tree height showed statistically significant decrease in DBH growth. To recover from pruning stress in terms of DBH growth rate, it took trees 6 years at the poorest test site and 4 years at the relatively better test sites. This indicates that site quality of plantation sites accounts for not only DBH growth differences between sites, but also recovery rate of trees from any disturbances. Results showed that for those trees pruned up to 75% of their height, total DBH growth was reduced by between 6.5% and 9.0% after 14 years compared to the control at the test sites. No negative effect from pruning on DBH increment was observed in the first growing season. This may be due to earlier storage of nutrition in different parts of trees, thereby enabling them to compensate for the stress of crown reduction during the first growing season following pruning.

One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the... more One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the coastal Mediterranean Region of Turkey is pine processionary moth (PPM), Thaumetopoea wilkinsoni Tams. The larvae of PPM feed on needles of Turkish red pine and on some other Mediterranean conifers such as cedar. This study covers the impact of defoliation caused by PPM on growth of red pine. Three test sites were taken on different plantations in the coastal Mediterranean region of Turkey, near Antalya city. The heights and diameters at breast height (dbh) of individual trees both in the control group and the treatment groups were measured. The trees defoliated over 40% in the test sites were considered as the treatments. The results indicated that, compared to the control, the losses in defoliated trees in terms of dbh increment were 55, 50 and 35% in the three test sites, respectively. The corresponding losses in the three test sites in terms of volume increment were 44, 37 and 17%, respectively. Test results also showed that effects of defoliation and site on both diameter and volume increment were statistically significant at 0.000 probability level.

Ormancılık Araştırma Dergisi, 2022

Some of the afforestation done by the forestry organization in Turkey are carried out in areas wh... more Some of the afforestation done by the forestry organization in Turkey are carried out in areas where there is water shortage in summer. Cedar and black pine are used for afforestation in these areas due to their ecological features. Regardless of the purpose of the afforestation, obtaining the expected benefit from these areas largely depends on the afforestation success and growth performance. In this study, long-term growth performance and carbon sequestration of the afforestations done with cedar and black pine in other areas than the natural habitat were investigated. The study was carried out in the afforestation areas around Elazığ and Malatya. Evaluations were based on measurements made in 1996, 2006 and 2018 in 7 permanent sample plots established in 1996 with cedar and black pine. Yield parameters and carbon sequestration were calculated in the sample plots. In the last measurement time, at the end of vejetationperiod of 2018, the average volume increases were determined as 2.24-3.88 and 4.07-11.67 m 3 ha-1 yr-1 and carbon sequestration were determined as 1.05-1.83 and 1.57-4.49 t ha-1 yr-1 for cedar and black pine stands for the ages of 46-48 and 45-51, respectively. It was found out from the growth analysis for both species that they perform similar to the natural habitat, so that these afforestations provide the objectives based on both carbon sequestration and other functions.

Ormancılık Araştırma Dergisi, 2020

Ülkemizde orman endüstrisinin ihtiyaç duyduğu odun hammaddesinin karşılanması konusu, uzun yıllar... more Ülkemizde orman endüstrisinin ihtiyaç duyduğu odun hammaddesinin karşılanması konusu, uzun yıllardır gündemdeki önemini korumaktadır. Özellikle özel sektör tarafından yapılacak endüstriyel ağaçlandırma yatırımlarında, girişimin ekonomik sonuçlarının ne olacağı ve kurulan plantasyonların hangi idare süresiyle işletilmesi gerektiği konularının, bilimsel çalışmalarla ortaya konması gerekmiştir. Bu çalışmada, Endüstriyel Ağaç Tarımı Sanayi ve Ticaret A. Ş. (ENAT) tarafından Bursa-Karacabey'de Sahilçamı ile yapılmış 493 ha büyüklüğündeki ağaçlandırma sahası örnek alınarak değerlendirilmiştir. Çalışma, ağaçlandırma alanının değişik bölgelerinden alınan 15 adet deneme sahasındaki tek ağaca dayalı gövde analizleri ve alan bazında yapılan hasılat ölçmeleri temel alınarak yapılmıştır. Ekonomik analizler için İç Karlılık Oranı Kriteri kullanılmıştır. Elde edilen sonuçlar, Karacabey Sahilçamı ağaçlandırma alanının beşli sınıflamaya göre I. ve II. bonitet alanlarından oluştuğunu, çoğunluğu 12 yaşında olan sahada bu yaşta ortalama artımın 20 m 3 /yıl a kadar çıkabildiğini göstermiştir. Yapılan iç karlılık analiz sonuçları, değişik arazi edinme ve kullanım stratejilerine göre değişmekle birlikte, yatırım sahasında hesaplanan iç karlılık oranlarının % 12,263'e kadar ulaştığını göstermektedir. Özellikle kullanılma olasılığı en yüksek strateji olan tahsisli araziler Sahilçamı ile ağaçlandırma yapılması durumunda iç karlılık oranının 16 yıl idare süresi için % 11,183'e kadar yükseldiği gözlenmiştir. Diğer önemli bir bulgu ise, analizi yapılan 6 değişik stratejiden 5'i için, iç karlılık oranına göre idare süresinin 15 ve 16 yıl olmasıdır.

Ormancılık Araştırma Dergisi, 2018

Introdução: A hospitalização infantil pode desenvolver na criança e família sentimentos confusos ... more Introdução: A hospitalização infantil pode desenvolver na criança e família sentimentos confusos e dicotômicos como, por exemplo, morte e cura, tristeza e alegria, medo e confiança, tornando o hospital um ambiente de experiências dolorosas e de grande relevância para toda a vida, por isso a importância de os profissionais de enfermagem desenvolver estratégias que minimizem estes sentimentos. Objetivo: Conhecer as estratégias utilizadas pelos profissionais da enfermagem para abordar a criança hospitalizada. Método: Estudo descritivo e exploratório, com abordagem qualitativa, realizado no período de junho a dezembro de 2015 na pediatria de um Hospital Escola do Sul do Rio Grande do Sul/Brasil, com oito profissionais da equipe de enfermagem, sendo três enfermeiros e cinco técnicos de enfermagem. O estudo teve aprovação do

African Journal of Agricultural Research, Oct 5, 2011

One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the... more One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the coastal Mediterranean Region of Turkey is pine processionary moth (PPM), Thaumetopoea wilkinsoni Tams. The larvae of PPM feed on needles of Turkish red pine and on some other Mediterranean conifers such as cedar. This study covers the impact of defoliation caused by PPM on growth of red pine. Three test sites were taken on different plantations in the coastal Mediterranean region of Turkey, near Antalya city. The heights and diameters at breast height (dbh) of individual trees both in the control group and the treatment groups were measured. The trees defoliated over 40% in the test sites were considered as the treatments. The results indicated that, compared to the control, the losses in defoliated trees in terms of dbh increment were 55, 50 and 35% in the three test sites, respectively. The corresponding losses in the three test sites in terms of volume increment were 44, 37 and 17%, respectively. Test results also showed that effects of defoliation and site on both diameter and volume increment were statistically significant at 0.000 probability level.

Biotechnology Letters TEST, 2005

Page 1. Ramzi Touchan Æ Elena Xoplaki Æ Gary Funkhouser Ju¨rg Luterbacher Æ Malcolm K. Hughes Æ N... more Page 1. Ramzi Touchan Æ Elena Xoplaki Æ Gary Funkhouser Ju¨rg Luterbacher Æ Malcolm K. Hughes Æ Nesat Erkan U¨nal Akkemik Æ Jean Stephan ... Most studies are recent (Akkemik 2000; Akkemik and Aras 2005; Akkemik et al. ...

DOI : 10.26650/ forestist.2018.330657 Bu calismanin amaci, Turkmen Dagi (Eskisehir, Kutahya) Bolg... more DOI : 10.26650/ forestist.2018.330657 Bu calismanin amaci, Turkmen Dagi (Eskisehir, Kutahya) Bolgesi saricam (Pinus sylvestris L. subsp. hamata (Steven) Fomin.) ormanlarinda agac bilesenlerine ait karbon yogunluklari ile bazi mescere ve yetisme ortami ozellikleri arasindaki iliskileri belirlemektir. Orneklemeler farkli yetisme ortami ozelliklerine sahip 58 alanda yapilmistir. Elde edilen veriler varyans ve korelasyon analizleri ile degerlendirilmistir. Alti agac bileseninin karbon yogunluklari arasinda istatistik bakimdan onemli farkliliklar bulunmustur (p<0,001). Karbon yogunlugu en dusuk kokte (%50,94), en yuksek ise kabukta (%54,75) bulunmustur. Saricam ormanlari icin agirlikli karbon orani %52,37 olarak hesaplanmistir. Agac bilesenlerine ait karbon yogunluklari ile bazi mescere ve yetisme ortami ozellikleri arasinda onemli iliskiler tespit edilmistir. Bonitet endeksi ve yukselti ile agac bilesenleri karbon oranlari arasinda negatif iliski bulunmustur. Ancak yukselti ile bir v...

Ormancılık Araştırma Dergisi, 2020

Ormancılık Araştırma Dergisi, 2017

Özet: Türbelerin ziyaret geleneği ve ağaç kültü gibi inanç ritüelleri Anadolu'nun farklı yöre... more Özet: Türbelerin ziyaret geleneği ve ağaç kültü gibi inanç ritüelleri Anadolu'nun farklı yörelerinde binlerce yıldır varlığını sürdürmektedir. Muğla İli'nin Fethiye İlçesi'ne bağlı Yaka Köyü'nün bir mahallesi olan Türbe Yerleşimi'ne gerçekleşen ziyaretler, bu yerleşimdeki ulu ağaçtan dilek dileme ve şifa bulma amacıyla yapılan ritüeller bu geleneklerin sürdürüldüğü örneklerdendir. 2011 yılında bir TÜBİTAK projesi kapsamında başlatılan araştırmalar ile Türbe Mahallesi'ndeki tarihi kalıntıların çizim ve belgeleme çalışmaları yapılarak ulaşılan veriler Coğrafi Bilgi Sistemine aktarılmıştır. Tarihi kalıntıların dönemi tam olarak bilinmemekle beraber ulaşılan bazı sonuçlar yardımıyla bunların Türkmen Boyları'ndan Menteşeoğulları Beyliği'ne ait olabileceği düşünülmektedir. Proje kapsamında ayrıca tarihi kalıntıların içinde ve yakınında bulunan 3 adet Cupressus sempervirens var. horizantalis (servi) ağacının yaş tespitine yönelik çalışma da yapılmış ve en ya...

İstanbul Üniversitesi Orman Fakültesi Dergisi, 2017

This study was aimed to determine the annual organic carbon stocks in forest floor and soil in Sc... more This study was aimed to determine the annual organic carbon stocks in forest floor and soil in Scots pine (Pinus sylvestris L. subsp. hamata (Steven) Fomin.) forests. Research was conducted with two samplings in 2003 and 2013 on massive of Türkmen Mountains (Eskişehir, Kütahya) where located in West Central Anatolia Region in Turkey. Samplings were performed in 40 plots at pole (dbh=11.0-19.9 cm) and small tree (dbh=20.0-35.9 cm) development stages on different aspects, elevation, slope degree and slope positions. Data were evaluated with pairedsamples t test. Soil organic carbon stocks show a significant (P<0.001) difference despite carbon stock in forest floor has not significant (P>0.05) difference between 2003 and 2013. Depending on these differences, accumulated carbon stocks were 2.88 Mg C ha-1 yr-1 in soil and 0.02 Mg C ha-1 yr-1 in forest floor.

CATENA, 2021

Abstract Land use and land use change are factors that affect carbon and nutrient stocks in ecosy... more Abstract Land use and land use change are factors that affect carbon and nutrient stocks in ecosystems. The aim of this research was to determine the effects of forest land use types on carbon pools and soil and forest floor features. This study was conducted in areas afforested with black pine (Pinus nigra Arn. subsp. pallasiana Lamb. Holmboe) and Scots pine (Pinus sylvestris L.) and on adjacent bare land within the Akdag Nature Park, which is located in the West-Central Anatolia Region of Turkey. Three 20 × 20 m sample plots were selected within each forest land use, and the diameters at breast height and heights of all trees were measured. Tree biomass and carbon stocks in the unit areas were calculated using tree biomass equations, and carbon conversion factors were developed for two tree species. Within each sample plot, disturbed and core soil samples and forest floor samples were taken at three points at depths of 0–10, 10–20 and 20–30 cm. The physical and chemical properties of the soil and forest floor samples were determined in the laboratory and measurements were converted to a unit area using volume values. The data were evaluated using independent sample t-tests and analysis of variance. The results showed that the ecosystem carbon (C) stocks differed significantly with forest land use type; black pine plantations, Scots pine plantations and bare land accumulated 235.2 t C ha−1, 206.1 t C ha−1 and 37.4 t C ha−1, respectively. We found that in addition to the positive effect of afforestation on soil, black pine had a greater impact on some forest floor and soil characteristics in the region than Scots pine. Thus, we suggest that priority should be given to black pine in afforestation of the region and in other ecosystems with similar climates. Additionally, our results reveal the importance of afforestation on bare lands for reducing the impact of global climate change.

Journal of the Faculty of Forestry Istanbul University, 2002

Croatian Journal of Forest Engineering : Journal for Theory and Application of Forestry Engineering, 2016

Pruning is a technique used to add value to trees growing in forest stands, allowing the formatio... more Pruning is a technique used to add value to trees growing in forest stands, allowing the formation of clear, knot-free wood. Although many factors affect timber value, knots are the primary cause of reduction in timber quality of conifers. On the other hand, pruning may also cause reduction in the rate of tree growth, depending on pruning intensity.The aim of this study is to assess the effects of different pruning intensities on DBH (diameter at breast height) growth of young Pinus brutia plantations. For this purpose, three field experimental sites each with different site qualities, were established in three different locations. Four different treatments were applied at each test site: 1) control, no pruning of branches, 2) pruning up to 25% of tree height, 3) pruning up to 50% of tree height, and 4) pruning up to 75% of tree height. The effects of pruning on DBH growth were observed over a period of 14 years. At »Bük« test site, which has the poorest site quality, only those spe...

Pruning is a technique used to add value to trees growing in forest stands, allowing the formatio... more Pruning is a technique used to add value to trees growing in forest stands, allowing the formation of clear, knot-free wood. Although many factors affect timber value, knots are the primary cause of reduction in timber quality of conifers. On the other hand, pruning may also cause reduction in the rate of tree growth, depending on pruning intensity.The aim of this study is to assess the effects of different pruning intensities on DBH (diameter at breast height) growth of young Pinus brutia plantations. For this purpose, three field experimental sites each with different site qualities, were established in three different locations. Four different treatments were applied at each test site: 1) control, no pruning of branches, 2) pruning up to 25% of tree height, 3) pruning up to 50% of tree height, and 4) pruning up to 75% of tree height. The effects of pruning on DBH growth were observed over a period of 14 years. At »Bük« test site, which has the poorest site quality, only those specimens pruned up to 75% of tree height showed significant reduction in DBH growth compared to the control. However, at »Nebiler« and »Kursunlu« test sites, specimens pruned both up to 50% and 75% of tree height showed statistically significant decrease in DBH growth. To recover from pruning stress in terms of DBH growth rate, it took trees 6 years at the poorest test site and 4 years at the relatively better test sites. This indicates that site quality of plantation sites accounts for not only DBH growth differences between sites, but also recovery rate of trees from any disturbances. Results showed that for those trees pruned up to 75% of their height, total DBH growth was reduced by between 6.5% and 9.0% after 14 years compared to the control at the test sites. No negative effect from pruning on DBH increment was observed in the first growing season. This may be due to earlier storage of nutrition in different parts of trees, thereby enabling them to compensate for the stress of crown reduction during the first growing season following pruning.

One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the... more One of the most important damaging insects on Turkish red pine (Pinus brutia Ten.) forests in the coastal Mediterranean Region of Turkey is pine processionary moth (PPM), Thaumetopoea wilkinsoni Tams. The larvae of PPM feed on needles of Turkish red pine and on some other Mediterranean conifers such as cedar. This study covers the impact of defoliation caused by PPM on growth of red pine. Three test sites were taken on different plantations in the coastal Mediterranean region of Turkey, near Antalya city. The heights and diameters at breast height (dbh) of individual trees both in the control group and the treatment groups were measured. The trees defoliated over 40% in the test sites were considered as the treatments. The results indicated that, compared to the control, the losses in defoliated trees in terms of dbh increment were 55, 50 and 35% in the three test sites, respectively. The corresponding losses in the three test sites in terms of volume increment were 44, 37 and 17%, respectively. Test results also showed that effects of defoliation and site on both diameter and volume increment were statistically significant at 0.000 probability level.