SUBSTRATE GROUPS OF BRYOPHYTES IN THE TERRITORY OF THE ZNESINNYA REGIONAL LANDSCAPE PARK (LVIV, UKRAINE)

The article presents data on the diversity and substrate groups of bryoflora of the Znesinnya Regional Landscape Park (Znesinnya RLP), located in the city of Lviv (Western Ukraine). Based on field research carried out in the period 2015-2018 and analysis of herbarium collections, an inventory was made of the bryoflora of the Znesinnya RLP. A total of 113 species of bryoflora belonging to 66 genera, 35 families and 2 divisions are presented from the investigated area. Of these, 105 species are members of the division Bryophyta and 8 belong to Marchantiophyta. Six regionally rare species of bryophytes have been recorded, namely Pellia endiviifolia, P. epiphylla, Encalypta streptocarpa, Fissidens exilis, Cirriphyllum crassinervium and Sciurohypnum starkei. With regard to substrate preferences, epigeous species of bryophytes predominated and accounted for 89.0% of the total number of species. The largest proportion of bryophytes occurred on bare soil (46.0%), while 36.3% and 25.7% species were found on soil among herbaceous vegetation and on soil with gravel, respectively. Stony substrates were colonized by 42.5% of bryophyte species, with 19.5% of species occurring on artificial stony substrates. In addition, 24.8% of the species belonged to epixils inhabiting old stumps and logs of varying degrees of decay, and the same proportion was represented by epiphytic species of bryophytes. The smallest proportion (10.7%) of bryophytes was confined to water bodies and swampy ecotopes.

CONTRIBUTION TO KNOWLEDGE ON THE VARIABILITY OF AROLLA PINE WOODLANDS OF THE NORTH-EASTERN TATRA MOUNTAINS

Knowledge of the overall syntaxonomic and habitat variability of forest communities with Arolla pine (Pinus cembra) within the Tatra Mountains (Western Carpathians) is still insufficient as field research was hindered by their hardly accessible localities and deforestation for high mountain grazing. Arolla pine woodlands were traditionally classified within the association Pino cembrae-Piceetum Myczkowski et Lesinski 1974, but recent surveys recognize more numerous units. Hitherto unpublished releves from the north-eastern part of the Tatra Mountains document the occurrence of several floristically and ecologically distinct Arolla pine communities: (1) acid woodland of Homogyno alpinae-Pinetum cembrae on nutrient-poor habitats over quartzitic bedrock, and (2) calcareous woodlands of species-poor Pyrolo rotundifoliae-Pinetum cembrae of sites with a well-developed, tangled humus soil horizon, Cystopterido montanae-Pinetum cembrae on habitats influenced by both limestones and quartzites, Primulo elatioris-Pinetum cembrae bound to sites with the most favourable humidity, and Seslerio tatrae-Pinetum cembrae with the most pronounced calcareous character.

CONSERVATION STATUS OF PLANTS AND HABITATS UNDER TEN YEARS OPERATION PHASE OF A WIND FARM. CASE STUDY: SFANTA ELENA KARST PLATEAU, IRON GATES NATURAL PARK, ROMANIA

Located in the Iron Gates Natural Park, Romania, at the foot of the Locvei Mountains, the Sfanta Elena Karst Plateau is a very picturesque territory, characterized by a karst relief, covered by High Nature Value grasslands. In the last decade this territory has been subjected to increasing anthropogenic pressures, and specific concerns on biodiversity have been raised after the construction of a wind farm in 2011. Starting from a concern expressed by a scientist, our study aims to provide current data on plant species with conservation value and to assess the conservation status of orchid-rich grasslands around wind turbines after ten years of wind farm operation. During the operation period we identified 19 plant taxa with conservation value, eight of which which are orchid species. Four of them are new reports for this territory: Gymnadenia conopsea, Neotinea ustulata, Neottia nidus-avis and Orchis simia, as well other rare taxa such as Cirsium grecescui, Lathyrus sphaericus, Linum hologynum and Rumex thyrsiflorus, are mentioned for the first time. The orchid-rich grasslands in the wind farm area correspond to the Natura 2000 habitat 6210* whose structure and floristic composition are within the acceptable limits of Favourable conservation status. The conservation status of plant species is directly dependent on the quality of their habitat, as well as the variety of pressure and threat factors in the area.

PHYLOGENY AND MORPHOLOGY OF NEODIDYMELLIOPSIS IRANENSIS SP. NOV., CAUSING DEAD BRANCHES OF CITRUS IN IRAN

Citrus plants, which are mostly cultivated in the southern tropical area of the country, are one of the important economic crops in Iran. Branch canker and dieback of citrus is an ongoing problem for citrus growers located in these areas and has imposed irreparable damage to the citrus production in this region in recent years. Disease symptoms consisted of the blight of vigorously growing shoots and dieback of the branches and rootstock trunks. This study aimed to characterize the citrus dieback pathogen morphologically and phylogenetically, and the species Neodidymelliopsis iranensis Soleimani & Goudarzi, sp. nov., is described and illustrated here. Isolates were derived from collected citrus samples with dieback symptoms. After preparing pure cultures from single spores on oatmeal agar and malt agar, the morphological features of the species were described and their pathogenicity was confirmed on lime (Citrus aurantifolia). Morphologically N. iranensis is easily separated from the other species of Neodidymelliopsis by the size of pycnidia, conidia septation, and NaOH test results. The morphological differences between our isolates and the other known species of Neodidymelliopsis were strongly supported by a multi-locus phylogenetic analysis based on the ITS region, and LSU, RPB2, and TUB2 genes. In the reconstructed phylogenetic tree, N. iranensis formed a well-supported clade with other Neodiddymelliopsis species in the Didymellaceae family, but was separated from all other Neodiddymelliopsis species. The distinct phylogenetic position is supported by differences in morphological features. Consequently, the specificity of the morphological and phylogenetical features of the collected isolates has convinced us to describe Neodidymelliopsis iranensis as a new species.

AQUATIC AND MARSHY VEGETATION IN THE CENTER OF THE LOWER PLAIN OF SOMES RIVER: GENERAL CHARACTERISATION

Aiming to a larger study of vegetation of the lower Some Plain (Romania), this short paper summarises the outcome of the floristic inventories performed in aquatic and marshy vegetation, which was dominant in the area until about three centuries ago when the extended wetland drainage has started. By using the phytosociological method, 20 plant associations assigned to four vegetation classes were distinguished. Without presenting phytosociological tables at this first stage, the syntaxonomical framework, distribution and species composition of the revealed plant communities are briefly discussed by reference to the process of wetland drying and successional change as well as to newly formed anthropogenic lakes. The conservative value of some plant community types is emphasized by mentioning the presence of several endangered species that are included in the European-level Habitats Directive and various regional or national red lists/books.

NEW INSIGHTS CONCERNING IDENTIFICATION, MANAGEMENT AND CONSERVATION OF INDIGENOUS TREES AND SHRUBS IN THE NETHERLANDS

In densely populated European countries like the Netherlands, old landscape elements such as ancient woodlands and ancient hedges are today rare. Owing to the introduction of exotic species and indigenous trees and shrubs imported from other climate zones, recognition of truly wild, i.e. autochthonous, individuals and populations is now problematical, posing challenges for forest management agencies, particularly at Natura 2000 sites. The author has developed a method for recognising genetically pure wild woody species, based on characteristics of the plant itself and those of the growing site. With this method, explained here, around 70% of the Netherlands has been surveyed, along with much of Flanders and part of the lower Rhine region of Germany. The results are illustrated with reference to two Dutch ancient woodlands, where new insights were obtained in terms of native status of the woody species and the ‘authenticity’ of the tree and shrub layer.

ADDITIONS TO THE FLORA OF THE REPUBLIC OF MORDOVIA, RUSSIA

The biodiversity conservation is based on our knowledge of the complete composition of plants and animals within a certain area. In this paper, we present data of biodiversity research in the Republic of Mordovia (European Russia). The obtained results are reflected in six vascular plant found for the first time in the studied region. Of them, four alien taxa (Philadelphus coronarius, Rosa x majorugosa, Spiraea japonica, Syringa josikaea) are known only in the Mordovia State Nature Reserve now. This underlines the need paying our attention to alien plants that escape into the wild (naturalize) in the least disturbed ecosystems of this Protected Area. The Urtica galeopsiifolia distribution needs to be clarified in more details because of its similarity to the widely known Urtica dioica. Thus, a majority of the species under discussion are alien plants considered as cultivated plants escaping in the wild. Taking into account the newly revealed species, the vascular plant flora of the Republic of Mordovia currently includes 1,472 species. In this study, we propose the continuing the study of man-made habitats in terms of accidentally or intentionally introduced alien species, as well as the searching of hidden taxa, such as Urtica galeopsiifolia found in this study.

EMPIRICAL USE OF THREE OAK SPECIES IN AFFORESTATION: LESSONS FROM SOWING AND TRANSPLANTING EXPERIMENTS

The effects of different factors on the growth in height and diameter of oak saplings in comparative cultures were estimated: progeny from autumn and spring sowing of acorns (1); growing conditions of pedunculate oak (Quercus robur L.) mother plants (2); the initial planting density of sessile oak (Q. petraea Liebl.) (3); natural lightening level of downy oak (Q. pubescens Willd.) mother plants (4). The pedunculate oak seedlings obtained after spring sowing were characterized by faster growth compared with those obtained from the autumn sowing. The lower growth rate observed in seedlings sown in autumn was due to the prolonged frosty weather during winter, which led to a decrease in acorn viability and progeny vigour. Due to the higher genetic diversity of the progeny obtained from the free-pollinated pedunculate oaks, it is possible that their growth was more intense and stable in comparison to those of saplings obtained from the acorns of isolated trees. The planting under the forest canopy had a clear influence on the growth in height of saplings. At low density levels (1.0 x 1.0 m), the sessile oak saplings benefited from larger availability of soil nutrients and displayed the highest growth, contrasting with those planted at high density (0.5 x 0.5 m). The deep and moderate shading caused a substantial reduction in the growth of downy oak saplings. Therefore, when planting, it is recommended to avoid using fast-growing species, which, due to asymmetric competition, could drastically reduce the growth in height of the downy oak saplings. Prolonged regeneration of the pruned root system following the transplantation process of sessile and downy oak seedlings determined their very slow growth in the first years of life.

LATHYRUS SAXATILIS, A NEW SPECIES FOR ROMANIA

During botanical observations made in the spring of 2021, in the area of Enisala Nature Reserve (Tulcea County), the species Lathyrus saxatilis (Fabaceae) was discovered, new for Romania and represented by a relatively large population. The article presents a detailed description of its morphological characters, together with the main seasonal characteristics and the coenotic environment in which the species grows there. At the same time, the conservation status of the population and its existing vulnerabilities are evaluated.

EVALUATING CONSERVATION STATUS, THREATS AND POPULATION TRENDS OF LEUCADENDRON, A PLANT GENUS ENDEMIC TO THE CAPE REGION IN SOUTH AFRICA

Declines in endemic species have significant impact on global biodiversity loss. More efforts need to be harnessed to further protect endemic species from the current global extinction crisis. This study evaluated the current conservation status, factors responsible for risk of extinction and the trends in populations of Leucadendron, a plant genus endemic to the Cape region in South Africa. The SANBI (South African National Biodiversity Institute) Red List was employed in this study. The results revealed that over 50% of taxa in this genus are threatened and most of the species are exposed to habitat destruction and the presence of invasive species. It was also discovered that two species of this genus are currently extinct, which implies this genus is facing a high risk of extinction. More efforts, such as designing effective methods of controlling forces responsible for the risk of extinction of taxa in this genus, should be put in place to prevent their complete extirpation in future.