(1975). Усі угруповання об'єднуються у клас Ceratodonto-Polytrichetea piliferi Mohan (1978). Лишайникові угруповання є індикаторами інтенсивності дефляційних процесів на нижньодніпровських аренах. За градієнтом зменшення сили дефляції вони утворюють такий ряд: 1) Placynthiello uliginosi-Cladonietum rei (інтенсивні процеси дефляції); 2) Cladonietum subulatofimbriatae (помірні процеси дефляції); 3) Xanthoparmelietum pokornyi (рівновага між дефляційно-демутаційними процесами); 4) Сladonietum alcicornis (інтенсивні процеси демутації). Пірамідальні та коржикоподібні морфоструктури лишайника Placуnthiella uliginosa, які утворюються на пісках, також є біоіндикаторними показниками інтенсивності дефляційних процесів. Робота ілюстрована 6 фітоценотичними таблицями та рисунками. Chornomors'k. bot. .z, Vol. 7, Differences between spatial and functional positions of lichen and bryophyte associations vs. higher plant communities are shown. We recognized four lichen associations in the lower Dnieper sand dunes: Сladonietum alcicornis Klement (1953), Xanthoparmelietum pokornyi Khodosovtsev ass. nova, Placynthiello uliginosi-Cladonietum rei Khodosovtsev ass. nova, Cladonietum subulato-fimbriatae Khodosovtsev ass. nova; all belonging to the union Cladonion sylvaticae Klement (1950) from the order Peltigeretalia Klement (1950). One bryophyte association, Syntrichietum ruraliformis Boiko et Khodosovtsev ass. nova, was recognized; it belongs to the union Ceratodonto-Polytrichion piliferi (Waldh. 1947) v. Hübschm. (1967 from the order Polytrichetalia piliferi v. Hübschm. (1975). We consider the stage of stabilization of the substrate as the leading factor in succession of terricolous lichen and moss communities on sand dunes at lower Dnieper. With increasing of stabilization of weathering, lichen and bryophyte communities alternate in the following order: (1) Placynthiello uliginosi-Cladonietum rei; (2) Cladonietum subulato-fimbriatae; (3) Xanthoparmelietum pokornyi; (4) Cladonietum alcicornis. Placуnthiella uliginosa growing on sand dunes forms pyramid-forming or pancake-forming microrelief, which indicate intensities of weathering vs. stabilization.

No abstract

The corticolous lichen communities in the old parks of Kherson region are presented by five new associations and two subassociations. Alyxorio varii-Xanthorietum parietinae has diagnostic species Alyxoria varia, Phaeophyscia nigricans, Scythioria phlogina and forms under influence of the sea winds in arid condition on a neutral bark of old trees (Fraxinus excelsior, F. pensilvanica, Populus alba, Salix alba). Melanelixio subargentiferi-Ramalinetum farinaceae has diagnostic species Melanelixia subargentifera, Phlyctis argena, Ramalina farinacea and colonize of the old trees with neutral bark (Fraxinus excelsior, Quercus robur) in shaded steppe forests and parks. Pioneer hemibasophilous, xerophilous, heliophylous association Rinodino pyrini-Calogayetum lobulatae forms on bark of the different trees in young parks of the southern Ukraine and differs from other nitrophylous communities by Calogaya lobulata, Myriolecis hagenii and Rinodina pyrina diagnostic species. These association are belong to the Xanthorion parietinae Оchsner 1928 alliance. Nitrophilous, heliophilous, xerophilous association Amandineo punctate-Xanthorietum parietinae subass. typicum is widespread in southern Ukraine on different tree species and has diagnostic species Amandinea punctata, Physcia adscendens and Xanthoria parietina. Subassociation Amandineo punctate-Xanthorietum parietinae subass. candelarielletosum efflorescentis has diagnostic species Pleurosticta acetabulum and Candelariella efflorescens and found in the old parks in southern Ukraine. Ombrophilous, scyophilous, mesophilous communities of the association Chaenotheco trichiali-Amandinietum punctatae has diagnostic species Amandinea punctata and Chaenotheca trichialis and forms on old trees at age 100-200 years (Quercus robur,

The data about 116 species of lichenized and 10 species of lichenicolous fungi of arboretum F.E. Falz-Fein Biosphere Reserve of "Askania-Nova" are given. 81 from them are new for reserve, 10-excluded from list of lichen biota of this territory. Caloplaca substerilis Vondrák, Palice & van den Boom, Lecania sylvestris (Arnold) Arnold, Marchandiomyces corallinus (Roberge) Diederich & D. Hawksw., Polychidium muscicola (Sw.) Gray, Scytinium callopismum (A. Massal.) Otalora, P.M. Jørg. & Wedin-are a new species for Ukraine, and Candelariella faginea Nimis, Poelt & Puntillo, C. subdeflexa (Nyl.) Lettau, Flavoplaca dichroa (Arup) Arup, Frödén & Søchting, Verrucaria breussii Diederich & Van den Boom. are new for plain part of Ukraine.

No abstract