Dižskābarža Fagus sylvatica (L.) izplatība Šķēdes mežu novadā.
Date
2009
Authors
Sabule, Liene
Journal Title
Journal ISSN
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Publisher
Latvijas Universitāte
Abstract
Eiropas dižskābardis Fagus sylvatica (L.) ir saimnieciski vērtīga lapu koku suga. Tas ir plaši sastopams Centrāleiropā un ir dominējošā koku suga mežu biotopos. Latvijā dižskābardis kā introducēta suga sastopams Kurzemē zinātniskās izpētes mežos.
Šī darba mērķis ir noskaidrot dižskābarža izplatīšanās un augšanas tendences Latvijā. Darbā izvirzīta hipotēze, ka dižskābardis Latvijā, Šķēdes mežu novadā, spēj izplatīties ārpus stādītās teritorijas.
Pētījumā apsekoti 30 parauglaukumi, nosakot tajos dižskābaržu vecumu un diametru katrā augstuma klasē. Lai noskaidrotu vainagu gaismas caurlaidības ietekmi uz paaugā esošo dižskābaržu attīstību, izmantota WinSCANOPY sistēma. Noteikts vidējais dižskābaržu izplatīšanās ātrums.
Dižskābaržu skaits paaugā ir saistīts ar vainagu gaismas caurlaidību. Pieejamais apgaismojums ietekmē arī dižskābaržu radiālo pieaugumu, jo pastāv liela mainība starp koku vecumu, augstumu un diametru. Neskatoties uz mainīgumu, ir saskatāma tendence, ka, pieaugot koka vecumam, pieaug arī augstums.
Pētītajā teritorijā dižskābaržu izplatīšanās ātrums varētu būt vidēji 3,4 metri gadā.
Darbs izstrādāts 2009. gadā Rīgā, LU Bioloģijas fakultātes Botānikas un Ekoloģijas katedrā.
Atslēgas vārdi: Eiropas dižskābardis, izplatīšanās ātrums, WinSCANOPY, Šķēdes mežu novads.
European beech Fagus sylvatica (L.) is economically valuable species of deciduous trees. It is widely distributed in Central Europe as dominant tree species in deciduous forests. Beech in Latvia occurs as introduced species in forests of scientific research of Kurzeme. Aim of this work is to find out spreading and growth tendencies of beech in Latvia. Hypothesis that beech in Latvia, district of Šķēde forest, can spread outside the planted territory is build up in this work. 30 sampling plots were inspected, defining the age and diameter of the beech in each height group. To clarify the openness of the crown on the advanced growth beech development, WinSCANOPY system was used. Beech amount in advanced growth is connected with openness of the crown. Accessible illumination influences also the radial growth of the breech, because great fluidity exists between age, height and diameter of the trees. In spite of fluidity, a tendency that by growing in age a tree grows in height is visible. In the inspected district the spreading speed of the beech could be about 3,4 metres per year. The work was produced in 2009, Riga, University of Latvia, Faculty of Biology, department of Botany and Ecology. Key words: European beech, spreading speed, WinSCANOPY, district of Šķēde forest.
European beech Fagus sylvatica (L.) is economically valuable species of deciduous trees. It is widely distributed in Central Europe as dominant tree species in deciduous forests. Beech in Latvia occurs as introduced species in forests of scientific research of Kurzeme. Aim of this work is to find out spreading and growth tendencies of beech in Latvia. Hypothesis that beech in Latvia, district of Šķēde forest, can spread outside the planted territory is build up in this work. 30 sampling plots were inspected, defining the age and diameter of the beech in each height group. To clarify the openness of the crown on the advanced growth beech development, WinSCANOPY system was used. Beech amount in advanced growth is connected with openness of the crown. Accessible illumination influences also the radial growth of the breech, because great fluidity exists between age, height and diameter of the trees. In spite of fluidity, a tendency that by growing in age a tree grows in height is visible. In the inspected district the spreading speed of the beech could be about 3,4 metres per year. The work was produced in 2009, Riga, University of Latvia, Faculty of Biology, department of Botany and Ecology. Key words: European beech, spreading speed, WinSCANOPY, district of Šķēde forest.
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