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Bivalve marine mollusc Barnea candida (= Pholas candidus) from Pholadidae family is sensitive to the high concentration of organic matter in sea water and recently has been included into the list of indicator species for the Black Sea (Alexandrov, Zaitsev, 2016). Its recording in Ukrainian part of the Danube Delta after more than 60 years since its first registration is probably the evidence of reduction of eutrophication and gradual restoration of local aquatic ecosystem biodiversity.
Uselis V., Uselienė A., 2012: Carex disperma - not yet extinct species in old-growth swampy forests of Lithuania [Carex disperma - dar neišnykusi pelkinių sengirių rūšis Lietuvoje]. - Bot. Lith., 18(1): 13-18. The paper describes the locality of Carex disperma reaffirmed after a century; the locality is situated in the present territory of the Viešvilė State Strict Nature Reserve. Plants were found in an old swampy spruce forest, which, according to the geobotanical description, corresponds to the Sphagno girgensohnii-Piceetum Polak. 1962 association. The stand is rich in indicator species of an old-growth forest. Twelve Carex disperma individuals, growing in the area of 3 m2, were recorded in 2009. One more locality has recently been found in Utena region, but it has not been published in scientific references yet. Information on other localities of this species in Lithuania is either very old (mid-19th century) or not confirmed by the herbarium specimens.
The paper presents the results of a 5-year study on the population size of the white stork (Ciconia ciconia L.) as one of the indicator species used to assess a biodiversity level in agricultural areas. The study was carried out in Masurian Landscape Park situated in Warmińsko-Mazurskie Voivodeship. The results demonstrated that the white stork population size was closely linked to agricultural areas, in particular, the extensively managed permanent grassland. In the years 2014–2018, even if minor changes were observed in the land use structure, the white stork population size showed a slight upward trend within the study area. In order to maintain this status, efforts should be made to preserve open landscapes (first and foremost – meadows and pastures), which are preferred feeding grounds of white stork. Consequently, potential decision as regards afforestation and housing should be made considerately.
In Safragashteh forest of Fuman in north of Iran, there is a hazel stand, which has grown naturally. The aim of this research was to evaluate the plant communities and soil characteristics in the area. This study included 50 ha of hazel protected area. A selective sampling method was utilized to record 30 400 m2 for tree and shrub layers, and sub-plots of 100 m2 for herbaceous species. Soil samples were collected at the 30 plots. We found three ecological species groups in the study area. Corylus avellana and Epimedium pinnatum in first group, Fagus orientalis, Asperula odorata, Euphorbia amygdaloides, Carex sp., Fragaria vesca and Viola sylvestris in second group, and Crataegus microphylla, Ilex spinigera, Primula heterochroma, Sedum stoloniferum and Vicia crocea in thirth group were the indicator species. Sand percent was significantly highest in Corylus avellana group, while clay, nutrients elements, pH and SP were significantly highest in the other groups. Biodiversity indices in Corylus avellana group were significantly less than other stands. We recommend to provide comprehensive conservation and management programs in order to protect of common hazel, associated plant species, and to prevent of human activities such as recreational use and livestock.
The environmental impact of cadmium use and its accumulation in nature have increased to alarming levels. This study aimed to morphologically and histologically investigate the acute toxic effects of cadmium on green toad, Pseudepidalea variabilis (Pallas, 1769) larvae. Embryos were obtained from specimens collected in amplexus from nature and kept under laboratory conditions until stage 26, when they were exposed to cadmium (0, 1, 5, 10, 25, and 50 Lig L-1) for 96 h. The LC10 LC50, and LC90 values of cadmium were calculated to be 26.98, 35.35, and 46.31 Lig L-1, respectively. Our results showed that cadmium had a negative effect on the body size of P. variabilis larvae (over 1 ng L-1). Histological examination detected a fusion of gill lamellae, liver haemorrhage, oedema in the abdominal cavity, and deformations of pronephric tubules (over 10 ng L-1). Our findings suggest that the green toad was sensitive to the cadmium treatment, with LC50 values lower than those reported by other studies. Thus, this species could be considered a reliable indicator species of environmental stress in aquatic ecosystem.
This work is focused on mapping the aeropalynologic situation in the Bratislavan atmosphere. Volumetric pollen and pollen abortivity analyses were used for this purpose. The research comprised comparison of two pollen stations in this city between 2007 and 2011. Twice the number of pollen grains was measured at the U.V.Z. station compared to the D.B. station. Results showed that (1) the highest pollen totals for the period were recorded in the Urticaceae family, (2) April was the month with the highest pollen yield, and (3) species of the Urticaceae family had the longest pollen season of all studied taxa. The detected differences may have been due to various factors including; the very different habitats in the vicinity of the stations, slightly different climatic conditions, different evaluation methods and human factors. The ecogenotoxicity and mutagenicity of air at these selected city locations was evaluated and compared, and the effectiveness of our methods were verified by Betula pendula Roth . and Pinus sylvestris L . indicator species.