Botanicheskii Zhurnal

The study of materials from Western and Eastern Siberia and the Far East has revealed a significant variability of an important diagnostic feature (the shape of spines) in Aulacoseira alpigena and a wider range of the species. This study and published data make it possible to emend the diagnosis of A. alpigena and reduce it to the synonyms of a morphologically similar species A. helvetica.

The pollution of natural forests preserved on the territory of the Irkutsk city was studied in terms of the level of adsorption of aerosol particles (particulate matter, PM_x) by main forest-forming species of woody plants. The needles of Scotch pine (Pinus sylvestris L.) and Siberian larch (Larix sibirica Ledeb.), as well as leaves of Silver birch (Betula pendula Roth) were sampled on the laid test plots to study their sorption capacity in relation to PM_x. Using the methods of scanning electron microscopy and X-ray spectral microanalysis, a wide variety of shapes, sizes, and chemical composition of aerosol particles on the surface of needles and leaves was shown. The adsorbed PM_x particles were found to contain carbon, silicon, sulfur, calcium, phosphorus, chlorine, and magnesium in the greatest amount; a significant proportion of heavy metals present in the form of metallized particle accumulations, in which the metal content can reach 80%. It has been shown that aerosol particles actively penetrate needle/leaf tissues through stomata and cuticle, damaging them. With a high level of pollution by PM_x, complete clogging of the stomata and heavy destruction of dermal tissues are often observed. The high level of adsorption of particulate matter by needles and leaves of trees indicates a high cleaning capacity of urban forests. At the same time, pollution with PM_x particles has a powerful negative effect on physiological and biochemical processes of a tree organism, which is manifested in a sharp violation of the parameters of photosynthesis, transpiration, and inhibition of growth processes.

As a result of identification the moss collections from Shikotan, Kunashir, Iturup and Urup islands (Southern Kuril Islands, Russian Far East) collected by T.I. Koroteeva, V.E. Fedosov, A.V. Shkurko, N.S. Liksakova, and A.K. Ezhkin in 2015–2021, new species for the islands were revealed: 6 ones for Urup, 8 for Iturup, 10 for Kunashir, and 19 for Shikotan. For the first time, 4 species new for the Kuril Islands were discovered, including three new for the Sakhalin Region (Forsstroemia cryphaeoides, Haplocladium intermedium, Rhizogemma staphylina, Meteorium buchananii). Another 3 species found in the islands are new for the Southern Kuriles (Dicranum fragilfolium, Gollania turgens, Hygroamblystegium varium). Most of the discovered species are rare in both the Sakhalin Region and the Russian Far East. To date, the moss flora of the Southern Kurils numbers 468 species and is the richest bryoflora in Russia.

Digitisation of the Moscow University Herbarium (MW) was started in the spring of 2015. Since October 2016, we have been publishing the images of specimens on the portal of the Moscow Digital Herbarium (https://plant.depo.msu.ru/) in open access mode. Gradually, we started to publish extended metadata on our portal, like full transcriptions of labels and georeferences, i.e. the coordinates of collection sites for each specimen. As of January, 14, 2023, two thirds of the specimens of the Moscow University Herbarium (693168 specimens, or 66%) are georeferenced, while 359593 specimens are still in work. The article describes the geodata of the Moscow University Herbarium both in the geographical aspect (data coverage for different regions) and in the aspect of georeferencing accuracy. General guidelines for georeferencing herbarium collections are given.

The All-Russian Scientific Conference with international participation “XII meeting in memoriam of Ekaterina Alexeevna Galkina – Types of mires of Russian regions” was held at the Komarov Botanical Institute RAS on February 3, 2023, and traditionally dedicated to the International Wetlands Day. The conference was attended by 109 specialists from 17 cities of Russia and Belarus, 15 scientific institutions, 8 universities and 7 conservation agencies. During the conference, 18 in-person and 5 online reports were presented.