The dataset comprises densities of the major crustacean zooplankton taxa collected from Loch Leven, a large shallow lake in the lowlands of Scotland, between 1972-2007. Data are provided as numbers of individuals per litre for each taxa. The data were collected by the Centre for Ecology & Hydrology and its predecessor bodies, as part of the Loch Leven long-term monitoring programme. Methods of collection varied over the period of collection with samples generally collected at fortnightly intervals. There are significant gaps in the dataset during the 1980s when funding for monitoring was limited. Full details about this dataset can be found at https://doi.org/10.5285/014f1c48-0838-49ca-b059-f084b13f4d5f

This dataset contains weather conditions, water quality, water chemistry and crustacean zooplankton counts sampled at Loch Leven throughout the year 2024. Loch Leven is a lowland lake in Scotland, United Kingdom. The data were collected as part of a long-term monitoring programme, which began in 1968 and is still underway. Sampling occurs roughly every 2 weeks with laboratory analysis and data processing being performed at the UK Centre for Ecology & Hydrology Edinburgh site. The sampling and processing were supported by the Natural Environment Research Council award number NE/R016429/1 as part of the UK-SCAPE programme delivering National Capability. Full details about this dataset can be found at https://doi.org/10.5285/f4925dbe-875b-479c-8f98-5a11bbdb7ba4