@article{article_258621, title={Long-term pollen monitoring experiments for the period 1994-2008 in the Rila Mountains, Bulgaria}, journal={Eurasian Journal of Forest Science}, volume={4}, pages={1–16}, year={2016}, DOI={10.31195/ejejfs.258621}, url={https://izlik.org/JA75EF57AU}, author={Tonkov, Spassimir and Bozilova, Elissaveta and Pavlova, Dolja and Raev, İvan}, keywords={Polen izleme, Polen kapanı, Polen saçımı, Ağaçlar, Rila Dağı, Bulgaristan}, abstract={<p> <strong>The annual pollen influx in the altitudinal zone 1 </strong> <strong>800 </strong> <strong>- </strong> <strong>20 </strong> <strong>50 m </strong> <strong>a.s.l. </strong> <strong>produced by </strong> <strong>plant </strong> <strong> communities </strong> <strong>in the coniferous and subalpine vegetation belts of the northwestern Rila Mts. </strong> <strong> was analyzed for </strong> <strong>the period 1994-2008 </strong> <strong>. </strong> <strong> </strong> <strong>The results from the </strong> <strong>five </strong> <strong> pollen traps </strong> <strong>placed on south and north slopes of a ridge </strong> <strong>revealed </strong> <strong>the </strong> <strong>dominance of <em>Pinus diploxylon </em>-type </strong> <strong>( </strong> <strong> <em>Pinus mugo, Pinus sylvestris </em> </strong> <strong>) </strong> <strong> and </strong> <strong> </strong> <strong>relatively constant presence of <em>Picea </em> </strong> <strong> <em> abies </em> </strong> <strong>and </strong> <strong> </strong> <strong> <em>Pinus peuce </em> </strong> <strong> pollen </strong> <strong>, with the exception in years of abundant flowering (1997, 1999, 2003 and partly 2005) </strong> <strong>. The species <em>Fagus sylvatica </em> which grows at lower altitudes </strong> <strong>showed </strong> <strong> very good capabilities of pollen dispersal </strong> <strong>upslope. T </strong> <strong>he trapping results </strong> <strong>indicated </strong> <strong> a cyclicity in </strong> <strong>the </strong> <strong> flowering </strong> <strong> of beech, with maximal pollen </strong> <strong>influx values </strong> <strong>in </strong> <strong> </strong> <strong>years </strong> <strong>1994, 1999, 2005 and 2007 </strong> <strong>, most probably dependent on </strong> <strong>the local climatic conditions. </strong> <strong> </strong> <strong>Pollen of </strong> <strong>deciduous trees such as </strong> <strong> <em>Quercus </em> </strong> <strong>, <em>Carpinus betulus, </em> <em>Corylus </em>, <em>Alnus, </em> <em>Betula </em>, although in less quantities, was also recorded </strong> <strong> in the traps </strong> <strong>. The herb component constituted only a small part of the total annual pollen influx. </strong> <strong> </strong> <strong>The </strong> <strong>results from long-term </strong> <strong>pollen </strong> <strong>trapping experiments </strong> <strong>could be applied to monitor the future trends in forest development in relation to climate change and local disturbances </strong> <strong>. </strong> </p>}, number={1}