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Articles by Ozcan Secmen
Total Records ( 3 ) for Ozcan Secmen
  Esat Cetin and Ozcan Secmen
  This study deals with the flora of Boncuk Mountains (2340 m) which lies between Ören-MuIla in southwest and Altinyayla (Dirmil)-Burdur in southeast in Southwestern Anatolia. The investigation was carried out between 1999-2002 and 858 taxa belonging to 83 families and 340 genera was identified. One hundred and eighty of identified taxa were endemic and the ratio to total flora was 21%. The number of nonflowering vascular plants (of Pteridophyta) was 9. 7 taxa belonged to Gymnospermae while the remaining 842 were Angiospermae. 130 taxa were Monocotylodonae, 712 of these were Dicotolodonae. The studied area is a typical transition area and east part of this area is one of the Important Plant Areas under name of East Boncuk Mountains in Turkey. IPA No. 55.
  Salih GUCEL and Ozcan SECMEN
  A. daphneola O.Schwarz (Rubiaceae) was originally recorded from a single location on Nif Mountain (Kemalpaþa) in western Turkey. This study was carried out from 2001 to 2004 to investigate the causes of this endemic species' restricted distribution. To that end, the environmental conditions and reproductive biology of the species were studied. As a result of field investigations, 4 additional locations were identified. These 5 localities (the peak of Nif Mountain, Alaca Mountain, Ayrýca Mountain, Bölme Hill, and another locality west of Nif Mountain) encompass an area of 2.5 km2. The total number of individuals in these localities was estimated to be 7956. The species had been declared as vulnerable (Vu) according to the 1994 IUCN categories. Our studies led us to recommend it as critically endangered (CR) B2ab(ii)+(iii), according to the 2001 IUCN categories. Our study of its pollination ecology demonstrated that A. daphneola is strictly autogamous and that the timing of pollen viability and stigma receptivity are synchronous. The seed/ovule ratio was calculated as 1:1. The seed/ovule ratio and observed low seed germination percentage could be the result of autogamy. Autogamy is contributing to the decline of this species' population.
  Ozcan SECMEN , Aykut GUVENSEN , Serdar Gokhan SENOL and Salih GUCEL
  Linum aretioides Boiss., a local endemic, is distributed only on 2 mountains (I.zmir: Bozdag; Denizli: Babadag) at the western part of Turkey between 1630 and 2300 m altitudes, above the tree line. The studies were conducted on Mount Bozdag above the ski complex between 1750 and 2150 m, and on Mount Babadag between 1630-2300 m both located at subalpine zones. Four 8 x 8 m quadrats on Bozdag and 5 on Babadag were used for the experiments. The development of reproductive structures of plants and frequency of insect visits were observed from early May to late June in 2006 and 2007. Blooming and pollination periods terminated by the last week in May on Babadag and by the second week in June on Bozdag. Temperatures below 10 °C before these periods appear to affect the activities of main pollinators, such as bees and butterflies, resulting in a decline in pollination, and eventually in seed formation. In Bozdag, the average relative humidity values at 1000 hours, when the insect activities were the highest, were 65.22 ± 2.79% in June 2006, 61.6 ± 4.44% in May 2007, and 59.6 ± 3.53% in June 2007. The corresponding values on Babadag( were 52.8 ± 3.1%, 59.58 ± 3.52%, and 53.28 ± 3.41%, respectively. The most effective species in pollination process were butterflies, in particular Pieris brassicae.
 
 
 
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