Effect of heat on seed germination of Pinus sylvestris and Pinus nigra ssp. pallasiana

Abstract

The present note presents and explains the results of a study dealing with the germination of seeds subjected to heat. Seeds of Scots pine (Pinus sylvestris L.) and Anatolian black pine (Pinus nigra ssp. pallasiana) were exposed to a range of temperatures (70, 90, 110, 130, and 150°C) for different exposure times (1 and 5 min). Germination rates were similar for all treatments and control at 1 min exposure for Anatolian black pine seeds, and almost no germination took place for all treatments at 5 min exposure. Similar results were obtained for Scots pine seeds, with the exception of a sharp decrease in the number of seeds germinated above 110°C. The effect of increasing the exposure time to 5 min was immediate, and no germination took place above 90°C. Results obtained indicate that seeds of the two species do not necessarily need fire for successful regeneration, but fires may have a positive effect on the germination by removing crown cover, thereby providing more light for the seeds deposited to the ground.

Diurnal surface fuel moisture prediction model for Calabrian pine stands in Turkey

“…Calabrian pine has a wide distribution in the eastern Mediterranean region and is the most common tree species in Turkey, covering a land area of 5.85 million ha (the largest area worldwide -GDF 2015). Pure natural stands of Calabrian pine are mostly found in fire prone areas in Turkey and usually originate from high-intensity, stand-replacing fires (Turna & Bilgili 2006). Most fires occur in pure or mixed Calabrian pine stands, often leading to the loss of goods, services, resources and even lives in Turkey (Tavsanoglu & Gürkan 2009).…”

Banco de semillas después de un incendio en un matorral xerófilo

“…There was a lower seedling emergence in the burned site than in the unburned one immediately after the fi re (Table 1); similar results have been obtained in other studies carried out in shrublands, where there was a substantial decrease of seeds in seed banks after a fi re (Pierce and Cowling, 1991;Ferrandis et al, 1999). Basically the signifi cant smaller seed bank values in the burned site can be explained by the high temperatures reached by fi re, as it has been reported by Turna and Bilgili (2006), who mentioned that exposure to temperatures between 110°C and 150°C had negative effects on germination percentages in some species in temperate sites. Tesfaye et al (2004) reported as well a strong reduction in the size of seed banks, where many seeds that were not deeply buried in the soil died.…”

Forest Fires and Birds

“…Özellikle yangın alanı içindeki dikili kuru ağaçlar yada hayatiyetlerine devam edebilenler, yırtıcı kuş türleri için dinlenme, tüneme ve gözetleme gibi faaliyetlerinin gerçekleştirilmesinde önemli rol oynamaktadır (Hutto, 1995). Yangına bağımlı ekosistemlerde, orman kaynaklarının planlanması ve ormancılık faaliyetlerinin gerçekleştirilmesi aşamalarında yangın sonrası alanlarda görülen bu durumdan faydalanma yoluna gidilmektedir (Song, 2002 (Turna and Bilgili, 2006;Bilgili and Baysal, 2013 (Song, 2002), biyolojik çeşitlilik çalışmaları ve planlamalar açısından önem taşımaktadır (Thom and Seidl, 2016).…”

“…Yangın alanı içindeki dikili kurular (Scott et al, 1980) ve kalan orman parçaları (Seip and Parker, 1997) kuşlar, böcekler ve diğer canlılar için öncelikli yaşam alanı görevi görmektedir (Hutto, 2006). Özellikle yangın alanı içindeki dikili kuru ağaçlar yada hayatiyetlerine devam edebilenler, yırtıcı kuş türleri için dinlenme, tüneme ve gözetleme gibi faaliyetlerinin gerçekleştirilmesinde önemli rol oynamaktadır (Hutto, 1995 (Turna and Bilgili, 2006;Bilgili and Baysal, 2013 (Thom and Seidl, 2016).…”