Structure of picea abies (l.) karst. stands affected by anthropogenic disturbances in the medvědí hora area (šumava national park), czech republic [Struktura porostů picea abies (l.) karst. ovlivněných antropogenními disturbancemi v oblasti medvědí hory (np šumava)]
Bednarik J.,Czech University of Life Sciences |
Matejka K.,Karel Matejka IDS
Zpravy Lesnickeho Vyzkumu | Year: 2014
The paper presents the results of a stand structure analysis of open Picea abies stand in the area called židovský les (Jewish forest). This area was strongly influenced by human activities in the past. The virgin forest was cut clear in the middle of the 19th century, and after that the locality was used for cattle grazing and blueberry picking. In the second half of the 20th century, the most opened stands were partly underplanted. Besides the mentioned interventions, the area has remained relatively untouched since World War II. Some authors, consequently, compare the Jewish forest with the non-intervention management areas established after the bark beetle outbreak. The forest structure and natural regeneration were analysed on 10 research plots (50 m × 50 m). According to the results, three main structure types have originated after the disturbance. A dense multi-layered structure has been developed in waterlogged forests, multi-layered open stands have been found around the summit of the Medvědí hora Mt. and on the western slopes. Uniform stands occur on the northern and eastern slopes. Generally, compared with forests in non-intervention management areas, the stands of the Jewish forest differ in low density of trees, absence or lack of deadwood and low density of natural tree-species regeneration.
Sticha V.,Ceskd zemedelskd univerzita v Praze |
Matejka K.,Karel Matejka IDS |
Bilek L.,Ceskd zemedelskd univerzita v Praze |
Malik K.,Ceskd zemedelskd univerzita v Praze |
Vacek S.,Ceskd zemedelskd univerzita v Praze
Zpravy Lesnickeho Vyzkumu | Year: 2013
The study deals with analysis of natural regeneration in the selected climax spruce stands in the šumava Mts., southern Bohemia. Six transects of size 5 m × 50 m situated at right angles to the contour lines were established. All individuals of tree regeneration up to the height of 3 m were mapped using Field-Map technology. Tree species and total height of individuals were recorded. The amount of regeneration is relatively low; nevertheless, in average 1,493 individuals per ha occurring in the area is a sufficient number for the formation of complex tree layer of climax spruce stand. In the M12 and M13 plots, absolute numbers of tree regeneration individuals were relatively low (440 and 920 ind. per ha). Mean height values ranged from 56 cm (M12 - Picea abies) to 173 cm (M15 - Sorbus aucuparia). The distribution of individuals in height classes is unequal, often asymmetrical.