Brzosko, E. 2003: The dynamics of island populations of Platanthera bifolia in the Biebrza National Park (NE Poland). — Ann. Bot. Fennici 40: 243–253.
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Jantunen, J. 2003: Vegetation changes in a semi-natural grassland during mowing and grazing periods. — Ann. Bot. Fennici 40: 255–263.
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Svensson, J. S. & Jeglum, J. K. 2003: Spatio-temporal properties of tree-species belts during primary succession on rising Gulf of Bothnia coastlines. — Ann. Bot. Fennici 40: 265–282.
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Cao, L.-M. & Long, C.-L. 2003: Colocasia bicolor (Araceae), a new species from Yunnan, China. — Ann. Bot. Fennici 40: 283–286.
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Dadandi, M. Y. & Duman, H. 2003: A new natural hybrid of Phlomis (Lamiaceae) from Turkey. — Ann. Bot. Fennici 40: 287–290.
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Hamzaoâlu, E. 2003: Astragalus hamzae (Fabaceae), a new species from Central Anatolia, Turkey. — Ann. Bot. Fennici 40: 291–294.
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Wang, Y., Lidén, M., Liu, Q. & Zhang, M. 2003: Corydalis pinnatibracteata (Fumariaceae), a new species from Qinghai, China. — Ann. Bot. Fennici 40: 295–298.
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Nomenclatural novelties in Ann. Bot. Fennici 40(4). — Ann. Bot. Fennici 40: 299.
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Borazan, A. & Babaç, M. T. 2003: Morphometric leaf variation in oaks (Quercus) of Bolu, Turkey. — Ann. Bot. Fennici 40: 233–242.
Genus Quercus (Fagaceae) has a problematic taxonomy because of widespread hybridization between the infrageneric taxa. The pattern of morphological leaf variation was evaluated for evidence of hybridization in Bolu, Turkey, since previous studies suggested that in oaks leaf morphology is a good indicator of putative hybridization. Principal components analysis was applied to data sets of leaf characters from five populations to describe variation in leaf morphology. Leaf characters analyzed in this study showed high degrees of variation as a result of hybridization between four taxa (Q. pubescens, Q. virgiliana, Q. petraea and Q. robur) of subgenus Quercus while Q. cerris as a member of subgenus Cerris was clearly separated from the others.
Brzosko, E. 2003: The dynamics of island populations of Platanthera bifolia in the Biebrza National Park (NE Poland). — Ann. Bot. Fennici 40: 243–253.
Two isolated populations of Platanthera bifolia (Orchidaceae) were monitored for six years in the Biebrza National Park. Platanthera bifolia populations seem to be affected by habitat conditions. The populations differed in size, proportion of flowering individuals and the effectiveness of reproduction. The natural fruiting rate of P. bifolia is high (over 90%), due to high levels of autogamy (almost 60%). Some costs of reproduction (in terms of reduction of leaf size) were observed. Leaves were largest before flowering and in subsequent years their size decreased. Dormancy affected population dynamics, varying from 22.4% in one population to 16.3% in the other. Both P. bifolia populations appeared to be healthy and are not threatened with extinction at the two study sites.
Jantunen, J. 2003: Vegetation changes in a semi-natural grassland during mowing and grazing periods. — Ann. Bot. Fennici 40: 255–263.
Mowing and grazing are often used as alternative methods of grassland management, but the effects on plant species richness are often found to be contradictory. In order to compare the methods, changes in plant species composition were studied in a restored dry semi-natural grassland after mowing (1990–1995) and grazing periods (1997–2001) in 30 sample plots. During the mowing period, the number of grassland species increased, but the change was unfavourable for the original dry grassland community. The results indicated that the aggressive growth of clovers (increase in 19 plots/decrease in 0 plots), Trifolium medium in particular, reduced the abundance of dry grassland species (6/13). Simultaneously both forest species (10/1) and overgrowth species (7/0) increased. During the grazing period, species turnover was lower and the growth of T. medium was reduced (6/8), but the invasion of clovers was continued by T. repens (11/1). Changes in species composition, including a decreased abundance of weeds (1/17), during grazing was more favourable for the grassland vegetation.
Svensson, J. S. & Jeglum, J. K. 2003: Spatio-temporal properties of tree-species belts during primary succession on rising Gulf of Bothnia coastlines. — Ann. Bot. Fennici 40: 265–282.
This paper elucidates spatial and temporal pathways of tree-species colonization and forest development during 260 years of undisturbed primary succession on rising ground-moraine shorelines in the Norra Kvarken Archipelago, Gulf of Bothnia, northern Sweden. Four species — grey alder (Alnus incana), rowan (Sorbus aucuparia), juniper (Juniperus communis), and spruce (Picea abies) — occur commonly and form distinct belts. The earliest individuals (>= 0.5 m) of alder were found after 20 years of succession, of spruce after 40 years, of juniper after 50 years, and of rowan after 60 years. Because of the longer time required by spruce to become dominant, the order of belts from younger to older was: alder–rowan–juniper–spruce. The belt width decreased from alder to rowan to juniper, and with increasing shore slope. We identified six successional stages by occurrence and composition, from pure alder to pure spruce, and three stages by species dominance. Spruce became dominant after 160 years of succession and forms the climax forests on these sites.
Cao, L.-M. & Long, C.-L. 2003: Colocasia bicolor (Araceae), a new species from Yunnan, China. — Ann. Bot. Fennici 40: 283–286.
Colocasia bicolor C.L. Long & L.M. Cao, sp. nova from China (Yunnan province, Jinghong and Mengla counties) is described and illustrated. Diagnostic morphological characters that distinguish it from C. heterochroma H. Li & Z.X. Wei are presented. The clearest differences are that C. bicolor has a sterile zone in the inflorescence, a rolled-up and reflexed spathe lamina, and a conoid, reddish-purple, greenish, white or pale yellow appendix. Chromosome numbers of C. bicolor (2n = 28) were observed in the plants cultivated in Kunming Botanical Garden.
Dadandi, M. Y. & Duman, H. 2003: A new natural hybrid of Phlomis (Lamiaceae) from Turkey. — Ann. Bot. Fennici 40: 287–290.
Phlomis x ekimii M.Y. Dadandi & H. Duman, a natural hybrid between P. bruguieri and P. capitata from SE Turkey is described as new to science and illustrated. The morphological characteristics of P. x ekimii are compared with those of its parents.
Hamzaoglu, E. 2003: Astragalus hamzae (Fabaceae), a new species from Central Anatolia, Turkey. — Ann. Bot. Fennici 40: 291–294.
Astragalus hamzae E. Hamzaoglu from Central Anatolia (Kirikkale-Turkey) is described as a species new to science and illustrated. It belongs in the section Caprini DC. and is related to A. pinetorum Boiss., from which it mainly differs in its very big legumes.
Wang, Y., Lidén, M., Liu, Q. & Zhang, M. 2003: Corydalis pinnatibracteata (Fumariaceae), a new species from Qinghai, China. — Ann. Bot. Fennici 40: 295–298.
Corydalis pinnatibracteata Y.W. Wang et al. sp. nova (Fumariaceae) is described from Qinghai, China. It is compared with the related C. sibirica (L. f.) Pers. and C. pseudoimpatiens Fedde and an identification key to the three species is presented.