The dataset contains records of Fishes (Pisces) collected in the River Sabor (NE Portugal) in 2012-2020, in the scope of a study aiming to understand the temporal dynamics of fish communities in relation to natural and anthropogenics drivers in a Mediterranean watershed. The study is part of research carried out at the Long Term Ecological Research Site (LTER) of Baixo Sabor (lter_eu_pt_002; https://deims.org/45722713-80e3-4387-a47b-82c97a6ef62b). The dataset includes data on fish communities obtained through electro-fishing (with restitution) at 74 sampling sites in 2012, and subsequently at 37 of these sites from 2013-2020. Until 2020, the data include a total of 27,514 records of 14 freshwater fish species. Part of these data has already been analised and published (see Ferreira et al., 2016; Mota-Ferreira et al., 2021). The dataset will be regularly updated with additional data from future sampling years.

Vascular plant cover estimated in the Kiskunság Restoration Experiments (1995-2019). The Kiskun Restoration Eperiments are located in abandoned arable land and clear-cut tree plantations mostly, but not entirely within LTER Fulophaza and close to the Bugac-Bocsa-Orgovany Site in the Kiskunság Sand Ridge. We have three restoration experiments with long-term monitoring of changes in plant species cover according to treatments. The locations are differentiated as stations in the database. Experiment one (Exp1) involved mowing as treatment (1995-2001) on clear-cut and chemically treated previous Robinia pseudo-acacia plantations in Fülöpháza, Izsák and Bugac (three stations). A 30 m x 40 m block was allocated for the mowing treatment at each site with twelve adjacent plots of 10 m by 10 m, with six control (unmowed) and six treatment (mowed) plots randomly selected. We also had some reference grassland plots. Monitoring took place in three permanent 2 m x 2 m units per each site (n=18/treatment) from 1995-1999, re-sampled several times until 2017. Data are accessible separately for the three sites (stations), sample ID reflects the 2 m x 2 m sampling units. Experiment two (Exp2) is located in Fülöpháza in on abandoned farmland (station). The experiment involved old-field sites. Treatment was carbon addition to induce soil N immobilization in 1998-2003. The block design was the same as above. Monitoring took place from 1998-2004, plus re-sampled less frequently till 2018. Data are accessible in one file for the station, sample ID reflects the 2 m x 2 m sampling units. Experiment three (Exp3) is also located in Fülöpháza in abandoned fields. Three stations are included that are abandoned arable fields of different age. Restorative treatments involved seeding, mowing and carbon amendment in 1 m x 1 m units (n=64) from 2003 to 2008. Monitoring took place in 2003-2008, resampled in 2019. Data are accessible separately for the three sites (stations), sample ID reflects the 1 m x 1 m sampling units with indication of treatments.

Measurements of chlorophyll-a are part of lake monitoring, which is usually carried out by monthly sampling at many regular lake sites (5 to 17 sites depending on the intensity of the measurements over the years). The integrated sample represents the whole water column of this polymictic shallow lake with a mean lake depth of 1.2m. The photometric measurement satisfies the analytical standards of Ö-Norm in Austria.