Discrete water samples for the determination of phytoplankton abundance and community composition were collected with a monthly frequency at 0.5, 5, 10 and 15 meters in the Gulf of Trieste – time series station (station C1). The site is part of the LTER-North Adriatic site. Samples were fixed with Ca(HCO3)2-buffered formaldehyde (0.8% final concentration) and cell abundance and species composition of phytoplankton were estimated according to Utermöhl’s method (1958), using an inverted microscope equipped with phase contrast, at 320-400x final magnifications. The overall aim of Long Term Ecosystem Research in the coastal area of the Gulf of Trieste, in the northernmost part of the Adriatic Sea and of the Mediterranean basin is to gain a better understanding of the temporal dynamics of phytoplankton bloom evolution, with particular focus on the response to natural and man – induced environmental changes. General information can be found at: http://nettuno.ogs.trieste.it/ilter/BIO/index.html

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).

Vertical profiles of salinty are collected on a monthly basis in the Gulf of Trieste – time series station using a CTD multiparametric probe. The site is part of the LTER-North Adriatic site. Data are used to characterize the temporal dynamic of hydrological properties in the coastal Long Term Ecosystem Research station of the Gulf of Trieste, in the northernmost part of the Adriatic Sea and of the Mediterranean basin. General information can be found at: http://nettuno.ogs.trieste.it/ilter/BIO/index.html

Vertical profiles of underwater photosynthetic active radiation (PAR) are collected on a monthly basis in the Gulf of Trieste – time series station (station C1). The site is part of the LTER-North Adriatic site.Data are used to characterize the light field and light extinction in the coastal Long Term Ecosystem Research station of the Gulf of Trieste, in the northernmost part of the Adriatic Sea and of the Mediterranean basin. General information can be found at: http://nettuno.ogs.trieste.it/ilter/BIO/index.html

Dataset provides chlorophyll-a concentrations measured in Lake Santo Parmense in period 2001-2003. 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).

Secchi depth is measured on a monthly basis in the Gulf of Trieste – time series station (station C1) as a general measure of seawater transparency.General information can be found at: http://nettuno.ogs.trieste.it/ilter/BIO/index.html

The data are for 2 lakes in Danube Delta SI000709: Rosu ( 45° 3'14.80"N 29°34'30.84"E) and Baclanesti ( 45°14'53.86"N 29° 7'44.22"E). Monthly data from 1975 to 1994 for Rosu and from 1982 to 1993 for Baclanesti. The lakes are tipical shallow floodplain lakes, their level being highly dependent of the Danube discharge. Variable list: CP,Deptht, NH4N, NO3N, Ntot, O2D, pH, PO4, Ptot, S_org, SDT, SI, Temp (water).

The dataset refers to annual mean (2011) air temperature measured at 4 forest CONECOFOR LTER plots, by automatic devices

Dataset provides chlorophyll-a concentrations measured in Lake Santo Parmense in period 2007-2010. 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 provides ammonia concentrations measured in Lake Santo Parmense during the 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 Koroleff (1970).