Katzel R.,Landeskompetenzzentrum Forst Eberswalde Brandenburg |
Becker F.,Landeskompetenzzentrum Forst Eberswalde Brandenburg |
Loffler S.,Landeskompetenzzentrum Forst Eberswalde Brandenburg
Forstarchiv | Year: 2012
Within a programme of forest conversion in dry habitats in Southern Brandenburg, the sessile oak (Quercus petraea) shall be advanced at large scale and integrated in pure pine stands. On the other hand, the oak is among the most damaged tree species of Europe. The selective nature of oak dieback suggests that the genetic structure of the population will change dynamically across multiple generations. On this note, two populations of sessile oak (Fünfeichen, Tauern) have been established as stands for genetic monitoring (GM) in 1999. Those monitoring plots are recognized stocks of seed for selected reproductive material, and they are situated in immediate proximity to both, permanent monitoring plots (level 2) as well as natural, old woods. Over the course of the last 10 years, all oaks of the first layer of canopy were calibrated, phytosociologically recorded, genetically characterized using isoenzymes (9 gene loci), and their condition of vitality (state of the crown conditions in summer and winter, mortality) was assessed. As part of the initial constitution, the cp DNA haplotypes of parts of the populations were determined. The annual fructification was recorded by means of five permanently installed nets (20 m 2 each) quantitatively as well as qualitatively (germination capacity, thousand-seed weight). Finally, results, future tasks as well as personnel expenses are delineated. © DLV GmbH.