Jutila, H. M. 1996: Seed bank and emergent vascular flora of ballast areas in Reposaari, Finland. — Ann. Bot. Fennici 33: 165–182.
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Korpela, L. & Reinikainen, A. 1996: A numerical analysis of mire margin forest vegetation in South and Central Finland. — Ann. Bot. Fennici 33: 183–197.
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Marhold, K., Ancev, M. E. & Tan, K. 1996: A new subspecies of Cardamine amara (Brassicaceae) from Bulgaria and Greece. — Ann. Bot. Fennici 33: 199–204.
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Tibell, L. 1996:Phaeocalicium (Mycocaliciaceae, Ascomycetes) in Northern Europe. — Ann. Bot. Fennici 33: 205–221.
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Martinez, I. & Burgaz, A. R. 1996: Anatomical study of Peltigera canina, P. membranacea and P. praetextata (lichenized Ascomycotina). — Ann. Bot. Fennici 33: 223–229.
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Obermayer, W. 1996: Pleopsidium discurrens, comb. nova, newly discovered in southern Tibet (Lichenological results of the Sino-German Joint Expedition to southeastern and eastern Tibet 1994. II.). — Ann. Bot. Fennici 33: 231–236
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Jutila, H. M. 1996: Seed bank and emergent vascular flora of ballast areas in Reposaari, Finland. — Ann. Bot. Fennici 33: 165–182.
I studied the seed bank and emergent flora of ballast areas in Reposaari, SW Finland (61°30'N, 21°28'E). Altogether 2 180 seedlings germinated from 104 samples (depth mean = 9.2 cm) making 11 205 seeds per 1 m2 area. 26.5% of the seedlings were monocots and 73.5% were dicots. I identified 70 taxa in the seed bank. The most common species were Potentilla argentea L., Tanacetum vulgare L., Poa trivialis L., Festuca rubra L., Agrostis capillaris L. and Poa pratensis L. Of all germinated seeds 25.3% were annuals or biennials and 62.7% were perennials (the rest not recognized to species level). Sixty-nine individuals of 9 ballast species germinated from seed bank samples: Artemisia absinthium L., Astragalus glycophyllus L., Carum carvi L., Cirsium arvense (L.) Scop. ssp. arvense, Lamium album L., Medicago lupulina L., Melilotus alba Medicus, M. altissima Thuill. and Senecio jacobaea L. This accounted for 13.2% of the species in the seed bank, but only 3.2% of all germinated seedlings. In the emergent flora of the study sites I found 134 vascular plant species, of which 30 were ballast species. The emergent flora and seed bank shared 49 taxa: 10 monocots, 38 dicots (of which 3 were trees or bushes) and one pteridophyte. The emergent flora was richer in ballast species than the seed bank (22.4% vs 13.2%). The number of seeds in the seed bank decreased with depth and after cold treatment. The densest and richest seed bank was encountered in sand and the sparsest and poorest in fine sand. The amount of stones was positively correlated with the number of germinating seedlings and species. A thick organic layer seemed to diminish the number of viable seeds.
Korpela, L. & Reinikainen, A. 1996: A numerical analysis of mire margin forest vegetation in South and Central Finland. — Ann. Bot. Fennici 33: 183–197.
The ecological structure of boreal mire margin vegetation (paludified forests, mire margin forests and forested pine and spruce mires) in South and Central Finland was examined using ordination (DCA) and classification (TWINSPAN) techniques on the vegetation data of 92 sample plots from the 8th National Forest Inventory (1985–86). The first DCA axis was interpreted as respond to a complex-gradient of nutrient availability on the basis of site classification, species composition and correlation with all measured tree stand variables. According to the distribution of species ecological groups along DCA1 axis the mire margin/mire expanse gradient was one of the main factors determining this nutrient availability. The second axis was interpreted in terms of paludification on the basis of species composition, site classification and its correlation with peat depth. Seven clusters resulted from a TWINSPAN classification of the vegetation data. These could be arranged into a sequence along the nutrient availability gradient by their species composition: three clusters represented ombro-oligotrophic, three clusters meso-oligotrophic and one cluster mesotrophic vegetation. The clusters corresponded only weakly to the traditional Finnish forest and mire site types as determined in the field.
Marhold, K., Ancev, M. E. & Tan, K. 1996: A new subspecies of Cardamine amara (Brassicaceae) from Bulgaria and Greece. — Ann. Bot. Fennici 33: 199–204.
Karyological and distributional data about Cardamine amara L. (Brassicaceae) in Bulgaria and Greece, together with the description of a new subspecies and a short review of the history of taxonomic treatment of this species in the area studied is presented. Cardamine amara subsp. balcanica Marhold, Ancev & Kit Tan, distributed in SW Bulgaria and NE Greece, is characterised by a densely hairy stem and (15–)17–34(–37) cauline leaves with (2–)3–4(–5) pairs of lateral leaflets.
Tibell, L. 1996:Phaeocalicium (Mycocaliciaceae, Ascomycetes) in Northern Europe. — Ann. Bot. Fennici 33: 205–221.
The taxonomy, distribution and ecology of eight species of Phaeocalicium A. F. W. Schmidt (Mycocaliciaceae, Ascomycetes) occurring in the Nordic countries and Greenland are described. They are parasitic or saprophytic mainly on thin twigs of trees and shrubs such as Alnus, Betula, Populus and Salix and are often quite host-specific. A key to the species is supplied. Two new species, Ph. boreale Tibell and Ph. flabelliforme Tibell are described. A lectotype is selected for Calicium praecedens Nyl., Mycocalicium pusiolum (Ach.) Räsänen var. macrospora Räsänen and Stenocybe tremulicola Norrl. ex Nyl., and a neotype is selected for Phaeocalicium populneum (Brond. ex Duby) A. F. W. Schmidt. The new combination Ph. tremulicola (Norrl. ex Nyl.) Tibell is proposed.
Martinez, I. & Burgaz, A. R. 1996: Anatomical study of Peltigera canina, P. membranacea and P. praetextata (lichenized Ascomycotina). — Ann. Bot. Fennici 33: 223–229.
The anatomical variation of Peltigera canina (L.) Willd., P. membranacea (Ach.) Nyl. and P. praetextata (Sommerf.) Zopf of the P. canina group was studied using statistical methods (PCA, DA, ANOVA). Forty four samples were analyzed in order to clarify possible taxonomic implications of spore size, thallus thickness, and of width and height of veins. The thallus thickness between veins and the vein height are the main characters to separate the three species. The relationships in the anatomical characters are closest between P. canina and P. praetextata.
Obermayer, W. 1996: Pleopsidium discurrens, comb. nova, newly discovered in southern Tibet (Lichenological results of the Sino-German Joint Expedition to southeastern and eastern Tibet 1994. II.). — Ann. Bot. Fennici 33: 231–236
Pleopsidium discurrens (Zahlbr.) Obermayer comb. nova, hitherto known only from the type and paratype localities in NW Yunnan and SW Sichuan, has been discovered in SE Tibet. Morphological characters which separate it from other taxa of Pleopsidium Koerber emend. Hafellner, TLC data and ecological notes are provided. A lectotype of Acarospora discurrens Zahlbr. is selected.