ISSN 0003-3847
© Finnish Zoological and Botanical Publishing Board 2000

Contents of Volume 37 Number 3, 2000

Bäck, S., Lehvo, A. & Blomster, J. 2000: Mass occurrence of unattached Enteromorpha intestinalis on the Finnish Baltic Sea coast. — Ann. Bot. Fennici 37: 155–161.
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Ecke, F. & Rydin, H. 2000: Succession on a land uplift coast in relation to plant strategy theory. — Ann. Bot. Fennici 37: 163–171.
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Hayirlioglu-Ayaz, S. & Beyazoglu, O. 2000: Chromosome numbers in species of Alchemilla ser. Elatae (Rosaceae) in Turkey. — Ann. Bot. Fennici 37: 173–182.
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Löfgren, P., Eriksson, O. & Lehtilä, K. 2000: Population dynamics and the effect of disturbance in the monocarpic herb Carlina vulgaris (Asteraceae). — Ann. Bot. Fennici 37: 183–192.
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Long, C. L. & Li, Y. H. 2000: Dioscorea lijiangensis, a new species from China. — Ann. Bot. Fennici 37: 193–195.
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Narits, A., Leht, M. & Paal, J. 2000: Taxonomic status of Saussurea alpina subsp. esthonica (Asteraceae): phenetical analysis. — Ann. Bot. Fennici 37: 197–206.
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Pavlova, D. K. & Manova, V. I. 2000: Pollen morphology of the genera Onobrychis and Hedysarum (Hedysareae, Fabaceae) in Bulgaria. — Ann. Bot. Fennici 37: 207–217.
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Roy, D. B., Hill, M. O., Rothery, P. & Bunce, R. G. H. 2000: Ecological indicator values of British species: an application of Gaussian logistic regression. — Ann. Bot. Fennici 37: 219–226.
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Szlachetko, D. L. & Mytnik, J. 2000: Lecanorchis seidenfadeni (Orchidaceae, Vanilloideae), a new orchid species from Malaya. — Ann. Bot. Fennici 37: 227–230.
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Nomenclatural novelties in Ann. Bot. Fennici 37: 234.
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Bäck, S., Lehvo, A. & Blomster, J. 2000: Mass occurrence of unattached Enteromorpha intestinalis on the Finnish Baltic Sea coast. — Ann. Bot. Fennici 37: 155–161.

The occurrence and summer biomass of an unattached Enteromorpha intestinalis mat was studied in Olkiluodonvesi on the Finnish Baltic Sea W coast between 1993 and 1997. Enteromorpha intestinalis thalli had lost their tubular shape, spread, and formed unattached monostromatic sheets. The mats were found in areas of soft sediment and sandy substrates where water depth was one to six metres. Optimum growth was at one to two metres. The mats were 5–15 cm thick with biomass maximum of 97 tn in an area of 3.7 km2 in 1993. Even during severe winter conditions, monostromatic E. intestinalis appeared in healthy state. In early spring, just after the ice melt, small amounts of E. intestinalis were found floating on the surface. Massive floating were observed after sunny and calm weather periods with low water level. On both occasions, E. intestinalis was moving within the water column.

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Ecke, F. & Rydin, H. 2000: Succession on a land uplift coast in relation to plant strategy theory. — Ann. Bot. Fennici 37: 163–171.

Plant strategies under succession were evaluated for communities on rising seashores of the northern Gulf of Bothnia, Sweden, representing sites of primary succession. The succession could not be explained by Grime’s CSR model. Early successional stages were neither characterized by high incidence of ruderals as proposed for secondary successions, nor by the dominance of stress tolerators, as proposed for primary successions. Short-lived species were almost totally absent. Instead, the shore habitat was characterized by species with an ability to tolerate and vegetatively recover from disturbance. The way in which different species experience one and the same form of stress or disturbance is an important reason why the classification on the basis of stress and disturbance seems to be insufficient to explain the course of this succession. Dominants of early and late successional stages differed with respect to root system, breeding system, leaf longevity and growth form (graminioid, herb).

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Hayirlioglu-Ayaz, S. & Beyazoglu, O. 2000: Chromosome numbers in species of Alchemilla ser. Elatae (Rosaceae) in Turkey. — Ann. Bot. Fennici 37: 173–182.

This paper presents the results of a karyological analysis of 17 species of Alchemilla L. sect. Alchemilla subsect. Calycanthum Rothm. ser. Elatae Rothm. The studies were carried out on plants from northeast Anatolia (Turkey). About 75% of the species have chromosome numbers 2n = 86 to 123. A few species have a lower number. The species are polyploids like the majority of species of sect. Alchemilla studied so far from various geographic areas.

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Löfgren, P., Eriksson, O. & Lehtilä, K. 2000: Population dynamics and the effect of disturbance in the monocarpic herb Carlina vulgaris (Asteraceae). — Ann. Bot. Fennici 37: 183–192.

The population dynamics of short-lived monocarpic perennials are often considered to be influenced by disturbance, providing areas of bare soil. We studied demography of the monocarpic herb Carlina vulgaris (Asteraceae), with special emphasis on the effect of disturbance. We used deterministic and stochastic transition matrix models based on the data from eight local populations to analyse the population dynamics. In addition, a field experiment was carried out to determine how disturbance and seed availability affect recruitment. Recruitment of C. vulgaris was limited by a combination of seed and microsite availability. Only populations subjected to high disturbance have a positive growth rate. Moderately sized populations are likely to be persistent when the disturbance intensity is high.

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Long, C. L. & Li, Y. H. 2000: Dioscorea lijiangensis, a new species from China. — Ann. Bot. Fennici 37: 193–195.

Dioscorea lijiangensis C. L. Long & Y. H. Li, a new species from Lijiang, northwest Yunnan, China, is described and illustrated. The morphological characteristics of Dioscorea lijiangensis and its related species are compared.

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Narits, A., Leht, M. & Paal, J. 2000: Taxonomic status of Saussurea alpina subsp. esthonica (Asteraceae): phenetical analysis. — Ann. Bot. Fennici 37: 197–206.

Morphological variation of Saussurea esthonica Baer ex Rupr. and S. alpina (L.) DC. s. str. was studied with different multivariate methods. The most important characters supporting the clustering of the specimens into groups are the shoot hight and characters correlated to it, and hairiness of leaves, while the type of trichomes in both taxa is the same. Hence, these characters depend very much on ecological conditions and are, therefore, taxonomically not reliable enough. It appeared also that several specimens were morphologically intermediate between typical representatives of S. esthonica and S. alpina s.str. Therefore, we consider it more appropriate to treat these taxa as eco-geographical subspecies: S. alpina subsp. esthonica (Baer ex Rupr.) Kupff. and S. alpina subsp. alpina. Chromosome numbers established for S. alpina subsp. esthonica are 2n = 52, 54.

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Pavlova, D. K. & Manova, V. I. 2000: Pollen morphology of the genera Onobrychis and Hedysarum (Hedysareae, Fabaceae) in Bulgaria. — Ann. Bot. Fennici 37: 207–217.

Pollen morphology of 14 taxa, 12 taxa of the genus Onobrychis Adans. and two taxa of the genus Hedysarum L., distributed in Bulgaria, was studied with light and electron microscopy. The pollen is 3-colpate, medium or large in size, with reticulate ornamentation. Differences are observed in the dimensions, the aperture shape and the exine stratification. One pollen type with three tentative subtypes are recognized based on size and ornamentation. Pollen morphology confirms a close relationship between the species of both genera.

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Roy, D. B., Hill, M. O., Rothery, P. & Bunce, R. G. H. 2000: Ecological indicator values of British species: an application of Gaussian logistic regression. — Ann. Bot. Fennici 37: 219–226.

In a large ecological survey of Britain,13841 quadrats were sampled in 508 1-km squares. The quadrats included 1132 species of vascular plants, of which 643 occurred in 10 or more quadrats. Applying the method of Gaussian logistic regression to data from this survey, ecological optima and tolerances of species were estimated for Ellenberg’s seven ecological indicator variables. Tolerances showed very little relation to the original scales. Most optima were within the range of the original scales but a few species lacked optima for some variables. Optima showed a strong positive relation to original values, but the resulting scale was compressed. We propose a locally-weighted trend line to convert each optimum value to an estimate of the original value. Reprediction using methods based on large-scale quadrat samples offers a very good means of extending Ellenberg’s values to a new geographic area such as Britain.

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Szlachetko, D. L. & Mytnik, J. 2000: Lecanorchis seidenfadeni (Orchidaceae, Vanilloideae), a new orchid species from Malaya. — Ann. Bot. Fennici 37: 227–230.

Lecanorchis seidenfadeni Szlach. & Myt. sp. nova (Orchidaceae, Vanilloideae) from Malaya is described, illustrated in line drawings and compared with two allied species, L. malaccensis Ridl. and L. multiflora J. J. Sm.

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Nomenclatural novelties in Ann. Bot. Fennici 37: 234.

Dioscorea lijiangensis C. L. Long & Y. H. Li p. 193
Lecanorchis seidenfadeni Szlach. & Myt., sp. nova p. 228

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