Long-term environmental monitoring record
Physiochemical conditions in Esthwaite Water have been continuously
monitored on a weekly to fortnightly basis from 1945 by the Freshwater
Biological Association (FBA), and then from 1989 by the UK Centre for
Ecology & Hydrology (UKCEH). Measurements and depth integrated surface
water samples (0-5 m) were collected from the deepest point of Esthwaite
Water, including surface water temperature, pH and alkalinity, and the
concentration of total phosphorus (TP), soluble reactive phosphorus
(SRP), nitrate-nitrogen (NO3-N), ammonium-nitrogen
(NH4-N) and chlorophyll a (Chl a ). Winter
SRP was calculated as the mean SRP from December to February. The full
dataset is available at:
https://doi.org/10.5285/87360d1a-85d9-4a4e-b9ac-e315977a52d3
(Maberly et al ., 2017), and annual means for these variables have
previously been described (Thorpe et al ., 2022).