Abstract
The paper presents the study of Evernia prunastri on Tilia cordata in 9 floodplain and 3 anthropogenically disturbed watershed lime forests. Two anthropogenic habitats are located along roads, and one of them is located in Yoshkar-Ola. The third one is located along power line forest clearing. The distributions of the number, size and vitality of E. prunastri thalli along the trunk were studied up to a height of 4 m (00,5 m, 0,51 m, 11,5 m, 1,52 m, 22,5 m, 2,53 m, 33,5 m, 3,54 m) at different exposures (north, east, south, west) by using a ladder. Most habitats are characterized by an increase of the number of thalli with an increase of the height of the trunk. In urban environment the number of thalli increases up to height of 2 m, with a sharp decrease at heights of 2,54 m. In floodplain habitats the largest number of thalli grow on the northern exposure. This pattern is not observed in anthropogenic habitats. Along the forest clearing more thalli were found at the more illuminated western exposure; there were no differences in the number of thalli between the exposures in roadside habitats. The sizes of E. prunastri thalli are larger at heights of 1,52,5 m in the most floodplain habitats. Thalli sizes do not differ at different trunk height in urban conditions and in a shaded floodplain habitat. The vitality of old potentially generative (g₃v) thalli of E. prunastri decreases with increasing height.
Highlights
Распределение числа талломов на дереве почти во всех м/о зависит от факторов дерево, высота и экспозиция
Обследование и анализ вертикального распределения талломов по стволу до высоты 4 м позволяет получить дополнительные сведения по приспособленности популяции E. prunastri в разных экологических условиях, что невозможно выявить при исследованиях деревьев до высоты 2 м
Summary
Введение Лишайники в лесах составляют значительную часть биоразнообразия [1]. Большинство исследований эпифитных лишайников проводится на нижних и доступных частях ствола дерева до 2 или 2,5 м [2– 4]. Распределение талломов лишайника Evernia prunastri (L.) Ach. по стволу липы сердцелистной в пойменных и водораздельных липняках Республики Марий Эл нений структуры популяции [20; 21]. Настоящая работа посвящена сравнению распределения числа, размеров, жизненности талломов E. prunastri по стволу липы сердцелистной (Tilia cordata Mill.) до высоты 4 м в экологически различающихся липняках. Сравнение распределений числа талломов E. prunastri по высоте ствола в разных м/о проводили с помощью критерия хи-квадрат.
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