@misc{Symonides_Ewa_Efect_1978, author={Symonides, Ewa}, editor={Polska Akademia Nauk. Instytut Ekologii}, copyright={Creative Commons Attribution BY 3.0 PL license}, address={Warszawa}, howpublished={online}, year={1978}, language={eng}, abstract={During a six years' period the course of the life cycle was observed of five species of dune annuals at three different density levels. The studies have shown that: (1) the time of seedling emergence and the duration of the seedling phase depend primarily on the weather conditions; (2) after the seedling phase has been passed, an increase in density is accompanied by an acceleration of the developmental phases (until the flowering time) and shortening of the life cycle; (3) the shorter the growth cycle of a species the more marked is the effect of density on the phenological development of individuals.}, type={Text}, title={Efect of population density on the phenological development of individuals of annual plant species}, URL={http://rcin.org.pl/Content/75212/PDF/WA058_86967_P2840-T26_Eko-Pol-A-Nr-2.pdf}, volume={26}, number={2}, journal={Ekologia Polska}, publisher={Polish Scientific Publishers}, keywords={psammophytes, therophytes, population density, phenological development of annuals, developmental rhythmicity of annuals, duration of phenophases}, }