Browsing by Author "Yiğit, Nurcan"

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Genetic Variation in Hanönü (Kastamonu)-Günlüburun Anatolian Black Pine (Pinus nigra Arnold. subsp.caramanica (Lamb.) Holmboe) Clonal Seed Orchard According to Some Needles Characters*
(International Symposium on Biology of Rare and Endemic Plant Species, 26-29 May, Fethiye-Mugla/Turk, 2010) Sevik, Hakan; Ayan, Sezgin; Yiğit, Nurcan
Anatolian Black Pine (Pinus nigra Arnold. subsp. pallasiana (Lamb.) Holmboe) is one of the most common and important forest tree species in Turkey. Meanwhile, the stands of this species occupy roughly 4,2 million ha, of which about 1,8 million ha are considered to be non productive forest. Also, this pine species is most important species which can be spread to the steppe regions in Anatolia. The semi-arid steppe regions evaluate as potential afforestation areas. Actually, the seed demand for this species is mainly supplied from current 53 of seed orchards and 79 of seed stands. Most of these seed orchards are still rather young and mainly established after 1990’s. The main objective of Anatolian black pine seed orchards is the production of genetically improved seed for reforestation purpose. The objective of this study was to investigate the genetic variation in Hanönü-Günlüburun Anatolian Black Pine (Pinus nigra Arnold. subsp. pallasiana (Lamb.) Holmboe) clonal seed orchard using eight morphological and anatomical needles characters. For this purpose; 3 sample trees from 30 clones and 10 needles from each samples tree were selected. Totally 900 sample needle were used for this study. Nine morphological and anatomical traits (needle length, needle width, needle thickness, sheath thickness, number of rows of stomata in the dorsal and ventral faces, number of stomata per cm of needle length in the dorsal and ventral faces) were determinate in 900 needle. The results showed that; there were significant differences between clones according to eight morphological and anatomical needles characters.
Genetic Variation in Taşköprü-Tekçam Scots Pine (Pinus sylvestris L.) Clonal Seed Orchard According to Some Needles Characters
(International Symposium on Biology of Rare and Endemic Plant Species, 26-29 May, 2010, Fethiye-Mugla/Turkey, 2010) Yiğit, Nurcan; Ayan, Sezgin; Sevik, Hakan
Scots pine (Pinus sylvestris L.) is one of the most common and important forest tree species in Turkey due to usefulness of its wood to many commercial uses. This species is classified as one of the economically important tree species for Turkish Forestry in the “National Tree Breeding and Seed Production Program”. Presently, the need of scots pine seeds is approximately 715 kg per year. Demand for scots pine seeds and seedlings in Turkey is obtained mainly by domestic production, but currently only 9.2% of the Turkish seed demand in scots pine is supplied from current 111 ha of seed orchards. High and genetically improved seed yield from the seed orchard is an integral part for the success of a tree breeding program. Genetic variation between the clones must be identified in the seed orchards to maintain high seed production. The objective of this study was to investigate the genetic variation in Kastamonu Taşköprü-Tekçam Scots pine (Pinus sylvestris L.) clonal seed orchard using eight morphological and anatomical needles characters. For this purpose; 3 sample trees from 30 clones and 10 needles from each samples tree were selected. Totally 900 sample needle were used for this study. Nine morphological and anatomical traits (needle length, needle width, needle thickness, sheath thickness, number of rows of stomata in the dorsal and ventral faces, number of stomata per cm of needle length in the dorsal and ventral faces) were determinate in 900 needle. The results showed that; there were significant differences between clones according to eight morphological and anatomical needles characters.
Korunan Alanlar ve İklim Değişikliğinde Rolü
(Peyzaj Mimarlığı 4. Kongresi, 14-17 Ekim, 2010, Kapadokya, 2010) Ayan, Sezgin; Sarıyıldız, Temel; Öztürk, Sevgi; Yiğit, Nurcan
Akdeniz Havzasındaki Türkiye, BM İklim Değişikliği Çerçevesi Sözleşmesi’ne (BMİDÇS) göre, iklim değişikliğine karşı yüksek derecede hassas bölgeler içerisindedir. Günümüzde etkisi fark edilir duruma gelen iklim değişikliğinin, tehditlerine yönelik olarak doğal ekosistemlerin, habitatların ve türlerin bütünüyle korunabilmesi amacıyla çeşitli girişimlerde bulunulmaktadır. Bu kapsamda, Türkiye çevre tabanlı sözleşmelerden Biyoçeşitlilik Sözleşmesine (BÇS) 1997’de, BMİDÇS’ne ise 2004’de, finansal bazlı anlaşma olan Kyoto Protokolüne ise 2009 tarihinde resmen taraf olmuştur. Bu süreçlerde farklı ekosistemlerin iklim değişimi ve karbon tutma rolleri üzerine çalışmalar başlatılmıştır. Bununla birlikte Korunan Alanların bu amaca yönelik olarak rolleri henüz fark edilip, tartışılmaya başlanmıştır. Korunan alanlar, ülkelerin kendi mevzuatları ve kurumsal yapılarına bağlı olarak statülendirildiği gibi uluslararası boyutta kabul gören IUCN kategorileri, UNESCO Biyosfer Rezervleri, Dünya Miras Alanları ile RAMSAR Alanları gibi statülerle de tanımlanabilmektedir. Korunan alanlar içerisinde milli parklar ve tabiatı koruma alanları gibi müdahaleden uzak bir anlayışla yönetilen alanlar, iklim değişimlerinin izlenmesi için en ideal doğal ekosistemlerdir. IUCN kategorileri içerisinde yer almamasına rağmen Türkiye’deki Milli Park Kanunu dışında 6831 sayılı Orman Kanununda yasal dayanağını bulan tohum meşçereleri, gen ormanları vb. alanlarda silvikültürel müdahalelere izin verilmektedir. Bu olanak, bu alanların karbon tutma kapasitesini etkilemede ve iklim değişimini azaltmada rollerini arttırabilecektir. Bu çalışmada; korunan alanların iklim değişimini izleme ve azaltmadaki rolleri üzerinde durulacaktır.
THE WOODY TAXA IN THE DIFFERENT RISK CATEGORY IN TURKISH FORESTRY AND CONSERVATION PRACTICES
(XIII.World Forestry Congress, CD-Proceedings, 18-23 October 2009, Buenos Aires-Argentina., 2009) Ayan, Sezgin; Sıvacıoğlu, Ahmet; Yiğit, Nurcan; Çelik, Durmuş Ali; Şevik, Hakan; Öztürk, Sevgi