Determination of relations between plant species diversity and productivity in Brutian pine stands

Mehmet Güvenç Negiz; Serkan Özdemir; Oğuzhan Erfidan; Alican Çıvğa; Özdemir Şentürk

Article Details

Determination of relations between plant species diversity and productivity in Brutian pine stands

Authors:

Mehmet Güvenç Negiz | Serkan Özdemir | Oğuzhan Erfidan | Alican Çıvğa | Özdemir Şentürk

Publisher:

Isparta University of Applied Sciences

Main Topics:

Orman Ekosistemleri

Journal:

Turkish Journal of Forestry Vol.25 Issue 1, pp.49-55

Document Type:

Article

Publication Date:

3/2024

Document Language:

English

Document ID (Org No.):

2001314779

pISSN:

2149-3898

Keywords:

Abstract:

 This study examines the relationship between Brutian pine productivity and plant species diversity, focusing on its potential as a valuable resource. Data was collected from 101 natural Brutian pine stands in Muğla and Antalya through inventory studies. Age and height values were recorded for three selected Brutian pine trees in each plot, along with plant species diversity using the Braun-Blanquet scale. Site index values were used to assign productivity scores between 1 and 5 for each plot. Diversity values were adjusted to a scale of 1 to 9 according to Westhoff and Maarel 1973 to calculate alpha diversity indices Shannon and Simpson using BİÇEB software. Environmental variables such as elevation, slope, radiation index, annual mean temperature, and annual precipitation were also collected for further analysis. The Kolmogorov-Smirnov normality test was first applied to the data matrix. Since it was determined that the normality assumption was not met p0.05, the Kruskal-Wallis test, which is a non-parametric method, was used to determine whether there is a significant difference between the diversity values for the site index groups. Results indicated a statistically significant difference p0.05 in diversity values among these groups. Then, diversity values and environmental variables were correlated using principal component analysis method PCA. At the same time, site index groups were also included in the PCA as class data. As a result, it was revealed that Shannon and Simpson diversity values have a negative relationship with elevation and slope and a positive relationship with total annual precipitation.

 This study examines the relationship between Brutian pine productivity and plant species diversity, focusing on its potential as a valuable resource. Data was collected from 101 natural Brutian pine stands in Muğla and Antalya through inventory studies. Age and height values were recorded for three selected Brutian pine trees in each plot, along with plant species diversity using the Braun-Blanquet scale. Site index values were used to assign productivity scores between 1 and 5 for each plot. Diversity values were adjusted to a scale of 1 to 9 according to Westhoff and Maarel 1973 to calculate alpha diversity indices Shannon and Simpson using BİÇEB software. Environmental variables such as elevation, slope, radiation index, annual mean temperature, and annual precipitation were also collected for further analysis. The Kolmogorov-Smirnov normality test was first applied to the data matrix. Since it was determined that the normality assumption was not met p0.05, the Kruskal-Wallis test, which is a non-parametric method, was used to determine whether there is a significant difference between the diversity values for the site index groups. Results indicated a statistically significant difference p0.05 in diversity values among these groups. Then, diversity values and environmental variables were correlated using principal component analysis method PCA. At the same time, site index groups were also included in the PCA as class data. As a result, it was revealed that Shannon and Simpson diversity values have a negative relationship with elevation and slope and a positive relationship with total annual precipitation.

 This study examines the relationship between Brutian pine productivity and plant species diversity, focusing on its potential as a valuable resource. Data was collected from 101 natural Brutian pine stands in Muğla and Antalya through inventory studies. Age and height values were recorded for three selected Brutian pine trees in each plot, along with plant species diversity using the Braun-Blanquet scale. Site index values were used to assign productivity scores between 1 and 5 for each plot. Diversity values were adjusted to a scale of 1 to 9 according to Westhoff and Maarel 1973 to calculate alpha diversity indices Shannon and Simpson using BİÇEB software. Environmental variables such as elevation, slope, radiation index, annual mean temperature, and annual precipitation were also collected for further analysis. The Kolmogorov-Smirnov normality test was first applied to the data matrix. Since it was determined that the normality assumption was not met p0.05, the Kruskal-Wallis test, which is a non-parametric method, was used to determine whether there is a significant difference between the diversity values for the site index groups. Results indicated a statistically significant difference p0.05 in diversity values among these groups. Then, diversity values and environmental variables were correlated using principal component analysis method PCA. At the same time, site index groups were also included in the PCA as class data. As a result, it was revealed that Shannon and Simpson diversity values have a negative relationship with elevation and slope and a positive relationship with total annual precipitation.

 Bu çalışmada kızılçamın verimliliği ile bitki tür çeşitliliği arasındaki ilişkiler ortaya konulmuştur. Veriler Muğla ve Antalyada 101 adet doğal kızılçam meşceresinde gerçekleştirilen envanter çalışmalarından temin edilmiştir. Her bir örnek alanda plus ağaç olarak seçilen 3 kızılçam için yaş ve boy değerleri kaydedilmiştir. Aynı zamanda örnek alanlara Braun-Blanquet skalasına göre bitki türleri kaydedilmiştir. Elde edilen yaş ve boy değerleri 75 yaşa endekslenerek bonitet değerleri hesaplanmış ve bonitet değerlerinin ortalaması alınarak her bir örnek alana ait ortalama bonitet değerleri hesaplanmıştır. Daha sonra bonitet değerlerine 1 ile 5 arasında bir verimlilik değeri atanmıştır. Çeşitlilik ölçümlerinin yapılabilmesi için kaplama alanı değerleri Westhoff ve Maarel 1973e göre 1 ile 9 arasında bir değere karşılık gelecek şekilde düzenlenmiştir. Çeşitlilik hesabı için BİÇEB yazılımı kullanılarak Shannon ve Simpson alfa çeşitlilik değerleri hesaplanmıştır. Ayrıca verimlilik ve çeşitlilik değerleri ile ilişkilendirilmek üzere yükselti, eğim, radyasyon indeksi, yıllık ortalama sıcaklık ve yıllık toplam yağış değişkenleri temin edilmiştir. İstatistik analiz aşamasında ilk olarak veri matrisine Kolmogorov-Smirnov normallik testi uygulanmıştır. Normallik varsayımının sağlanmadığının p0.05 tespit edilmesinden ötürü bonitet indeksi gruplarına yönelik olarak çeşitlilik değerlerinin arasında anlamlı fark olup olmadığının tespit edilebilmesi için non-parametrik bir yöntem olan Kruskal-Wallis testi kullanılmıştır. Analiz neticesinde çeşitlilik değerleri arasında istatistik açıdan anlamlı bir fark p0.05 olduğu görülmüştür. Daha sonra temel bileşenler analizi yöntemi kullanılarak çeşitlilik değerleri ile çevresel değişkenler ilişkilendirilmiştir. Aynı zamanda bonitet indeksi grupları da sınıf verisi olarak temel bileşenler analizine dahil edilmiştir. Sonuç olarak Shannon ve Simpson çeşitlilik değerlerinin yükselti ve eğim ile negatif, yıllık toplam yağış ile pozitif bir ilişkiye sahip olduğunu ortaya konulmuştur.

Article Details

Determination of relations between plant species diversity and productivity in Brutian pine stands

Authors:

Mehmet Güvenç Negiz | Serkan Özdemir | Oğuzhan Erfidan | Alican Çıvğa | Özdemir Şentürk

Publisher:

Isparta University of Applied Sciences

Main Topics:

Orman Ekosistemleri

Journal:

Turkish Journal of Forestry Vol.25 Issue 1, pp.49-55

Document Type:

Article

Publication Date:

3/2024

Document Language:

English

Document ID (Org No.):

2001314779

pISSN:

2149-3898

Biodiversity

Site index

Kruskal-wallis test

Pinus brutia

Principal components analysisBiyoçeşitlilik

Bonitet indeksi

Kruskal-wallis testi

Pinus brutia

Temel bileşenler analizi

Issues

Article Details

Authors: Mehmet Güvenç Negiz | Serkan Özdemir | Oğuzhan Erfidan | Alican Çıvğa | Özdemir Şentürk

Publisher: Isparta University of Applied Sciences

Main Topics: Orman Ekosistemleri

Journal: Turkish Journal of Forestry Vol.25 Issue 1, pp.49-55

Document Type: Article

Publication Date: 3/2024

Document Language: English

Document ID (Org No.): 2001314779

pISSN: 2149-3898

Issues

Authors:

Mehmet Güvenç Negiz | Serkan Özdemir | Oğuzhan Erfidan | Alican Çıvğa | Özdemir Şentürk

Publisher:

Isparta University of Applied Sciences

Main Topics:

Orman Ekosistemleri

Journal:

Turkish Journal of Forestry Vol.25 Issue 1, pp.49-55

Document Type:

Article

Publication Date:

3/2024

Document Language:

English

Document ID (Org No.):

2001314779

pISSN:

2149-3898