The Aelmoeseneie Forest is a 28.5 ha mixed deciduous forest in the community of Gontrode, just southeast of Ghent. The largest part of the forest is ‘ancient forest’, i.e. it is permanently forested since before 1775, while the forest is surrounded by agricultural land (mostly pastures). The soil consists of a silt loam to loam soil (Planosol), overlaying a mosaic of tertiary clayey and sandy deposits with high base saturation starting at 50 cm depth. Forest management is designed to obtain a more natural tree species composition and to conserve biodiversity. More info can be found at www.aelmoeseneiebos.ugent.be.

grass dominated catchment located in the northern part of Norway, monitored by The Norwegian Agricultural Environmental Monitoring Programme (JOVA)

Dataset provides information about reactive silica (in mg Si L-1) in Lake Paione Superiore (LPS) at different layer depths along the water column within the period 1984-2013. Data are at least biannual (late summer/autumn). In total 283 records of reactive silica in the Lake for the period are uploaded. The range is from 0.14 to 0.82 mg Si L-1 (±0.105). Lake Paione Superiore is a high altitude Alpine lake, located in the Bognanco Valley, Piedmont Region, Italy. It has a surface area of 0.68 ha and a maximum depth of 11.5 m. The Lake is included in the monitoring sites of the UN-ECE Program ICP WATERS (International Cooperative Programme on Assessment and Monitoring of Acidification of Rivers and Lakes)

Dataset provides water temperature measured in Lake Santo Parmense in 1991. Temperature was measured at different depths over the whole water column at the point of maximum depth of the lake.

The LTSER platform Neusiedler See – Seewinkel represents Europe‘s most western steppe lake - Lake Neusiedl (Austria) - and the cultural landscape that it’s surrounded by. It extends a total area of about 500 km² and is characterized by the steppe lake, it’s reed belt and a mosaic of salt marshes, periodically dry saline lakes, sand habitats, dry and wet grasslands, vineyards, cropland, touristic infrastructure and rural settlements. The region (average altitude 120 m.a.s.l.) is characterised by a hot, dry Pannonian climate with an annual precipitation of 600 mm and temperatures between 40 °C in summer and -20 °C in winter, making this area unique in Austria and contrasts the alpine landscapes of western Austria. Located on the eastern edge of the alps and the western edge of the small hungarian plain the area is one of Austria’s hotspots of biodiversity. Alpine, asian, mediterranean and nordic species are present as well as endemics. The high diversity of habitats results from a high variability of environmental factors as different soil types, flooding and draught but also anthropogenic influence. The LTSER platform includes 8 national institutions: Biologische Station Neusiedler See, Nationalpark Neusiedler See – Seewinkel, ABOL (NHM Wien), Hydrographischer Dienst Burgenland, Medizinische Universität Wien, Universität Wien and Umweltbundesamt. Scientific research is therefore wide but can be summarised on (1) monitoring of freshwater ecosystems, (2) bird migration and breeding behaviour, (3) mapping and assessment of vegetation, (4) monitoring of climate and effects of climate change, (5) monitoring of insects, (6) conservation management and (7) regional development. The aim of the research is to provide decision-making tools for sustainable ecosystem management and conservation as well as sustainable regional development.

Dataset provides chlorophyll-a concentrations measured in Lake Santo Parmense in 1991. Water samples for chlorophyll-a analysis were collected by means of a Ruttner Bottle at different depths over the whole water column at the point of maximum depth of the lake. Samples were analysed according to Strickland & Parsons (1968).

Dataset of daily mean values of water temperature in 2013 at Lake Päijänne, Jyväsjärvi, Finland.

Dataset provides dissolved reactive silica concentrations measured in Lake Santo Parmense in period 2007-2010. Water samples were collected by means of a Ruttner bottle at different depths over the whole water column at the point of maximum depth of the lake. Samples were analysed spectrophotometrically according to Golterman et al. (1978).

Dataset provides water temperature measured in Lake Santo Parmense in period may 2001 - october 2003. Temperature was measured at different depths over the whole water column at the point of maximum depth of the lake.

This LTER-site corresponds with a 0.25 ha intensive forest monitoring plot (ICP Forests Level II) including a 0.25 ha buffer zone. The site is located in a homogeneous stand of Corsican pine (Pinus nigra ssp. laricio var. Corsicana Loud.) planted in 1930 on former heathland and is part of Gewestbos Ravels, a landscape (about 1000 ha) with deciduous and coniferous forests, heathland, bogs and pastures in the northern part of the Campine ecoregion of Flanders. The terrain is gently sloping (1-2 %) and the soil is a well-drained sandy soil (Endogleyic Folic Brunic Albic Arenosol (Dystric)). Ground vegetation is dominated by ferns (Dryopteris dilatata and D. carthusiana) and Vaccinium myrtillus. After a storm in February 2007 felled several trees an understorey of Betula pubescens started to develop. Intensive monitoring was started in 1987 with the main objective to study the effects of air pollution on biogeochemical cycling and forest performance (growth, vitality). This yielded a number of long-term data series including on atmospheric deposition, air quality, soil and soil solution chemistry, tree mineral nutrition, ground vegetation and growth. Monitoring will be continued in the future as a statutory task of INBO.