Directional turnover towards larger-ranged plants over time and across habitats

Species turnover is ubiquitous. However, it remains unknown whether certain types of species are consistently gained or lost across different habitats. Here, we analysed the trajectories of 1827 plant species over time intervals of up to 78 years at 141 sites across mountain summits, forests, and lowland grasslands in Europe. We found, albeit with relatively small effect sizes, displacements of smaller- by larger-ranged species across habitats. Communities shifted in parallel towards more nutrient-demanding species, with species from nutrient-rich habitats having larger ranges. Because these species are typically strong competitors, declines of smaller-ranged species could reflect not only abiotic drivers of global change, but also biotic pressure from increased competition. The ubiquitous component of turnover based on species range size we found here may partially reconcile findings of no net loss in local diversity with global species loss, and link community-scale turnover to macroecological processes such as biotic homogenisation

Global maps of soil temperature

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km2 resolution for 0–5 and 5–15 cm soil depth. These maps were created by calculating the difference (i.e. offset) between in situ soil temperature measurements, based on time series from over 1200 1-km2 pixels (summarized from 8519 unique temperature sensors) across all the world\u27s major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (−0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications

Global maps of soil temperature

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km² resolution for 0–5 and 5–15 cm soil depth. These maps were created by calculating the difference (i.e., offset) between in-situ soil temperature measurements, based on time series from over 1200 1-km² pixels (summarized from 8500 unique temperature sensors) across all the world’s major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (-0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in-situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications

Global maps of soil temperature.

Research in global change ecology relies heavily on global climatic grids derived from estimates of air temperature in open areas at around 2 m above the ground. These climatic grids do not reflect conditions below vegetation canopies and near the ground surface, where critical ecosystem functions occur and most terrestrial species reside. Here, we provide global maps of soil temperature and bioclimatic variables at a 1-km2 resolution for 0-5 and 5-15 cm soil depth. These maps were created by calculating the difference (i.e. offset) between in situ soil temperature measurements, based on time series from over 1200 1-km2 pixels (summarized from 8519 unique temperature sensors) across all the world's major terrestrial biomes, and coarse-grained air temperature estimates from ERA5-Land (an atmospheric reanalysis by the European Centre for Medium-Range Weather Forecasts). We show that mean annual soil temperature differs markedly from the corresponding gridded air temperature, by up to 10°C (mean = 3.0 ± 2.1°C), with substantial variation across biomes and seasons. Over the year, soils in cold and/or dry biomes are substantially warmer (+3.6 ± 2.3°C) than gridded air temperature, whereas soils in warm and humid environments are on average slightly cooler (-0.7 ± 2.3°C). The observed substantial and biome-specific offsets emphasize that the projected impacts of climate and climate change on near-surface biodiversity and ecosystem functioning are inaccurately assessed when air rather than soil temperature is used, especially in cold environments. The global soil-related bioclimatic variables provided here are an important step forward for any application in ecology and related disciplines. Nevertheless, we highlight the need to fill remaining geographic gaps by collecting more in situ measurements of microclimate conditions to further enhance the spatiotemporal resolution of global soil temperature products for ecological applications

Syntaxonomische Überarbeitung der Auwälder in Rumänien

This paper compares the floodplain forests from Romania to those described from Central and Southeastern Europe from syntaxonomical and ecological perspectives and proposes a clear and ade-quate vegetation classification system that was needed for the Romanian floodplain forests. We performed a syntaxonomical analysis and classification of 473 vegetation relevés published from all nine Romanian provinces, between the years 1968 and 2015. The plant communities, established on the basis of character and differential species, were grouped within the alliance Alnion incanae Pawłowski 1928, according to current phytosociological consensus. The floristic structure of each syntaxon is presented in a synoptic table with species constancy expressed as a percentage. Since plant communi-ties specific to intramontane river floodplains are notably different from those in the plains, we grouped the associations within two different suballiances. Within the suballiance Alnenion glutinosae-incanae Oberdorfer 1953, we included the associations Stellario nemorum-Alnetum glutionosae Lohmeyer 1957, Telekio speciosae-Alnetum incanae Coldea 1990, and Carici remotae-Fraxinetum excelsioris Koch ex Faber 1936. In the suballiance Ulmenion Oberdorfer 1953, we included the associations Fraxino pannonicae-Ulmetum glabrae Aszód 1935 corr. Soó 1963, Ulmo campestris-Fraxinetum holotrichae Borza ex Sanda 1970 and Fraxino pallisae-Quercetum pedunculiflorae Oprea 1997. In order to show the distribution of these associations within the territory of Romania, we have generated two maps displaying the provenance of the analyzed relevés. The proposed classification system will facilitate the phytosociological and ecological investigation of floodplain forests and support the activities aiming at their conservation.In einer syntaxonomischen und ökologischen Untersuchung wurden die Auenwälder Rumäniens im Vergleich zu denen Zentral- und Südost-Europas analysiert. Zu diesem Zweck wurden 473 phytocoenologische Aufnahmen, die im Laufe der Jahre von verschiedenen Autoren aus allen Landesteilen Rumäniens veröffentlicht wurden, analysiert und syntaxonomisch eingeordnet. Die floristische Struktur der einzelnen Syntaxa wurde in einer synoptischen Tabelle zusammengefasst, wobei die Stetigkeit der Arten prozentuell wiedergegeben wird. Aufgrund von Charakter- und Trennarten wurden die identifizierten Pflanzengesellschaften (Assoziationen) von uns in den Verband Alnion incanae Pawlowski 1928 entsprechend den heutigen phytosoziologischen Auffassungen gruppiert (s. Beilage S1). Da sich die spezifischen Phytocoenosen der intramontanen Flussauen und der Ebene floristisch prägnant voneinander unterscheiden, erscheint es sinnvoll, die abgegrenzten Assoziationen zwei verschiedenen Unterverbänden zuzuordnen. In den durch Differenzialarten Alnus glutinosa, A. incana, Caltha palustris, Chaerophyllum hirsutum, Chrysosplenium alternifolium, Cirsium oleraceum, Crepis paludosa, Equisetum hyemale, E. sylvaticum, Matteuccia struthiopteris, Petasites albus, Senecio ovatus, und Stellaria nemorum gekennzeichneten Unterverband Alnenion glutinosae-incanae Oberdorfer 1953 wurden die Assozi-ationen Stellario nemorum-Alnetum glutinosae Lohmeyer 1957, Telekio speciosae-Alnetum incanae Coldea 1990 und Carici remotae-Fraxinetum excelsioris Koch ex Faber 1936 eingegliedert. Dem Unterverband Ulmenion Oberdorfer 1953,der sich vom ersten Unterverband durch die Trennarten Acer tataricum, Asparagus tenuifolius, Convallaria majalis, Malus sylvestris, Poa sylvicola, Polygonatum latifolium, Populus alba, Pyrus pyraster, Quercus pedunculiflora, Q. robur, Rhamnus catharticus und Ulmus minor unterscheidet, wurden die Assoziationen Fraxino pannonicae-Ulmetum glabrae Aszód 1953 corr. Soó 1963, Ulmo campestris-Fraxinetum holotrichae Borza ex Sanda 1970 und Fraxino pallisae-Quercetum pedunculiflorae Oprea 1997 untergeordnet. Die Verbreitung der untersuchten Pflanzengesellschaften auf dem Gebiete Rumäniens ist aus den zwei beigefügten Karten (Abb. 1, 2) mit den Ortsangaben der phytosoziologischen Aufnahmen der jeweiligen Syntaxa ersichtlich

Sustainable Development of the Rural Areas from Romania: Development of a Digital Tool to Generate Adapted Solutions at Local Level

Rural Romania faces many problems, the main one being depopulation. In general, young adults frequently choose to migrate to urban centers or leave the country entirely to satisfy economic and/or social aspirations. The aim of this study is to identify intractable issues that inhibit rural development and to identify actionable solutions. In this regard, a questionnaire was developed and administered at the local level. The results obtained were analyzed with the SPSS Statistical Program, with the Pearson Chi-square, and Cramer and Pearson coefficients were determined. The answers obtained from applying the questionnaire made it possible to identify the causes that inhibit the sustainable development of rural areas. It can be considered that a solution that could lead to the sustainable development of the rural areas from Romania would be represented by the development of a digital tool that would create a synergy between local authorities, researchers and the private sector. In order to be able to solve these problems, the Government of Romania should provide the necessary funds to local authorities, depending on the needs identified through the digital instrument, acting directly on the aspects that restrain the development of those areas