Functional diversity of earthworm communities in forests in the south of the Russian Far East

Key species of soil macrofauna – large soil saprophages, i.e. earthworms – have been studied in unique in terms of floristic and faunal diversity, as well as the most preserved forests of the southern Russian Far East. The results of studying taxonomic and functional diversity of earthworms, their biomass and abundance and patterns of temporal spatial distribution in summer seasons, are presented. The complete set of the main functional groups of earthworms (epigeic, epi-endogeic, endogeic and anecic) was found only in the best-preserved valley forests, with no traces of logging and fires over the last century. The earthworm community is not complete (one or two functional groups are missing) in one of valley forest that was partially cut down and affected by fires in recent decades and in hillside forests. Horizontal spatial distribution was analysed for the epi-endogeic and endogeic groups of earthworms, dominating in terms of biomass and occurrence. It was found that, in the summer season, the group of epi-endogeic species showed the "covering" type of distribution (regular distribution without aggregation), whereas the group of endogeic species showed the "spotty" type of distribution (aggregated distribution)

Structural and species diversity on North and South slopes in coniferous-deciduous forests of the North-Western Caucasus

The research was conducted in similar soil-orographic conditions of three widespread coniferous-deciduous forest types in the North-Western Caucasus: aspen-hornbeam, beech-fir-hornbeam, and fir-beech. The methods used included geobotanical, population-ontogenetic, and soil-zoological. It was found that the north and south slopes in all the studied forest types, in comparison with the flat areas, are characterised by significantly higher plant species richness. The efficiency of the renewal of arboral cenopopulations was much higher on the slopes, in comparison with the flat areas: the number of tree species (higher by 20–70%); density of tree species (higher by 50–100%); the number of cenopopulations of tree species with a complete ontogenetic spectrum was larger on the slopes, in comparison with the flat areas. A greater number of ecological groups of plants were described on the north and south slopes, in comparison with the flat areas. The proportion of boreal species was higher on the north slopes, in comparison with the south slopes, whereas the majority of meadow-forest edge species were the south slopes. The north and south slopes were characterised by the full functional diversity of soil invertebrates, whereas endemic and sub-endemic macrofauna also preserved. On the north slopes, we revealed a high biomass of large litter and soil saprophages, including species and groups actively participating in transformation of plant litter and soil formation. The south slopes showed high densities of phytophages and predators (among soil macrofauna), which regulate the diversity of other components of forest communities through biotic interactions. All the studied forest types on the north and south slopes exceeded the flat areas in terms of species diversity of plant communities, regeneration of tree species, ecological plant groups, endemic fauna of soil invertebrates, including soil formers. This confirms need to the protection of such territories to preserve and maintain the biological diversity of the coniferous-deciduous forests in the North-Western Caucasus

Northwest Caucasus forest spreading evaluation by GIS modeling and historical and geographic data analysis

The article presents the results of the GIS modeling of the potential areas of the Northwest Caucasus coniferous and broad leaved forest stand dominants (Abies nordmanniana, Carpinus betulus, Fagus orientalis, Picea orientalis, Quercus species). The constructed models demonstrate the significantly wider potential areas of these species as compared with the real ones and the almost complete coincidence of the potential areas of dark coniferous tree species A. nordmanniana and P. orientalis. The precipitation parameter in the driest month of the year, altitude above the sea level and temperature seasonality make the greatest contribution to the construction of GIS models of the modern area of the dark coniferous and broad leaved tree species. The analysis of the materials on the natural resource management history demonstrated that it is not the climatic changes, but the anthropogenic changes, that has been the main cause of the reduction of the area of the coniferous-broad leaved forests of the Northwest Caucasus since the middle of the 19th century. The northern boundary of the forest belt has shifted significantly from the plains and foothills to the foothill and mountain areas as a result of the economic and military development of the area

The role of canopy gaps in maintaining biodiversity of plants and soil macrofauna in the forests of the northwestern Caucasus

The research was carried out in the coniferous-deciduous forests of the northwestern Caucasus, growing in similar climatic and soil-orographic conditions. Three types of forests of different ages were studied: aspen-hornbeam (50-70 years), beech-fir-hornbeam (80-110 years) and fir-beech forests (over 450 years). The studies were performed on the territory Krasnodar Krai (upper reaches of the Pshekha river, State Nature Reserve Chernogor'e) and the Republic of Adygea (upper reaches of the Belaya river, the Caucasian State Biosphere Reserve) in the summer seasons 2016 and 2019. The research involves geobotanical, population-ontogenetic, and soil-zoological methods. It has been established that in the canopy gaps of all forest types species density of plants is almost twice as high as in under-crown areas or even higher due to good light factor and high soil moisture since the tree stand does not intercept precipitation. Regeneration of tree cenopopulations in all forest types is much more effective in canopy gaps compared to under-crown areas. The undergrowth density of different types of trees is 10 and more times higher in gaps than in the under-crown areas. The maximum number of ecological-coenotic groups of plants is observed in the canopy gaps in all types of forest. All major trophic groups of macrofauna inhabit canopy gaps and under-crown areas, but their biomass in gaps is significantly exceeds that in under-crown areas. Due to the fact that soil moisture supply is an essential factor for moisture-loving saprophages’ activity, biomass of saprophages is on average twice as high in gaps than under-crown areas of all forest types. Only canopy gaps have high biomass of anecic earthworms – there are important ecosystem engineers, which contribute a lot to plant litter processing and the formation of soil porosity

Views of Generation Z regarding care and care careers: a four-country study

Globally, life expectancy is increasing, as is the need for effective care responses to chronic health conditions, global emergencies and health disparities. Alongside this is a shortage of skilled caregivers. This four-country qualitative study investigates the views of â careâ and â care careersâ of Generation Z (the next generation to join the workforce). Four cross-cultural themes emerged: conceptualising care; objects and subjects of care; recognising the challenges of care; and appreciating care work. Discussed in relation to Trontoâ s analysis of care, these themes illuminate Generation Zâ s commitment to care and highlight the need for organisational and political action to attract young people to care careers

Global data on earthworm abundance, biomass, diversity and corresponding environmental properties

Publisher Copyright: © 2021, The Author(s).Earthworms are an important soil taxon as ecosystem engineers, providing a variety of crucial ecosystem functions and services. Little is known about their diversity and distribution at large spatial scales, despite the availability of considerable amounts of local-scale data. Earthworm diversity data, obtained from the primary literature or provided directly by authors, were collated with information on site locations, including coordinates, habitat cover, and soil properties. Datasets were required, at a minimum, to include abundance or biomass of earthworms at a site. Where possible, site-level species lists were included, as well as the abundance and biomass of individual species and ecological groups. This global dataset contains 10,840 sites, with 184 species, from 60 countries and all continents except Antarctica. The data were obtained from 182 published articles, published between 1973 and 2017, and 17 unpublished datasets. Amalgamating data into a single global database will assist researchers in investigating and answering a wide variety of pressing questions, for example, jointly assessing aboveground and belowground biodiversity distributions and drivers of biodiversity change.Peer reviewe

Global data on earthworm abundance, biomass, diversity and corresponding environmental properties

Earthworms are an important soil taxon as ecosystem engineers, providing a variety of crucial ecosystem functions and services. Little is known about their diversity and distribution at large spatial scales, despite the availability of considerable amounts of local-scale data. Earthworm diversity data, obtained from the primary literature or provided directly by authors, were collated with information on site locations, including coordinates, habitat cover, and soil properties. Datasets were required, at a minimum, to include abundance or biomass of earthworms at a site. Where possible, site-level species lists were included, as well as the abundance and biomass of individual species and ecological groups. This global dataset contains 10,840 sites, with 184 species, from 60 countries and all continents except Antarctica. The data were obtained from 182 published articles, published between 1973 and 2017, and 17 unpublished datasets. Amalgamating data into a single global database will assist researchers in investigating and answering a wide variety of pressing questions, for example, jointly assessing aboveground and belowground biodiversity distributions and drivers of biodiversity change

Restoration of Earthworms Community (Oligochaeta: Lumbricidae) at Sand Quarries (Smolensk Oblast, Russia)

The earthworm community formation studies have been carried out during the primary succession at the sand quarries formed during the sand mining. It has been established that the earthworm colonization during the 7 – 50 years sand quarry overgrowth is slow and the species composition is not fully restored therewith. The quarries are mainly occupied with the endogeic species. The results of the experiment on the introduction of the species of earthworms of different morpho-ecological groups have been described for the quarries at different stages of restoration. It has been established that the endogeic species colonization is advisable at the initial stages of the quarry overgrowth and the epi-endogeic, epigeic and anecic species colonization – at the later stages