Realm: Freshwater
Climate: Temperate
Biome: Small Lake Ecosystems
Central latitude: 46.251200
Central longitude: -89.503400
Duration: 12 years, from 1984 to 1995

3962 records

179 distinct species

Across the time series Merismopedia tenuissima is the most frequently occurring species

Methods

Data managers note: This current dataset represents 1 of 2 subsets from the methods described below. 2013-2015 data were split from data prior to 1995 due to change in sampling frequency. Users should also note that East and West Long Lake only had 4 monthly samples in 1989 compared to weekly samples for all other sites-years. Rarefaction or removal may be needed to get a consistent sampling effort across the time series. Data on epilimnetic phytoplankton from 1984-2015, determined by light microscopy from pooled Van Dorn samples at 100 percent, 50 percent, and 25 percent of surface irradiance. St. Amand (1990) and Cottingham (1996) describe the counting protocols in detail. Samples counted prior to 1996 were assigned one taxon name with all taxonomic information. This taxon name was split into distinct columns of genus, species and description for archival as best possible. Samples from 2013-2015 were sent to Phycotech inc. (http://www.phycotech.com/) to be counted.Sampling Frequency: varies; Number of sites: 5 Paul, Peter, West Long, East Long and Tuesday Lakes are sampled weekly during the summer at permanent sampling stations on transect lines over the deepest portion of each lake. One lake is sampled per day. 4L Van Dorn samplers are rinsed three times with water from sampling depths, then lowered to three depths to collect fixed depth samples at three different water layers: Pooled Mixed Layer (PML), Metalimnion, and Hypolimnion. Pooled Mixed Layers range from 0 to 2 m depth, metalimnion at 2-4 m, and hypolimnion at 9-12 m depending on the lake. Abundance in this dataset is in the units of individuals per litre (concentration).

Citation(s)

@Dataset{BioTIME_cit385, Study_id = {636}, Citation_id = {385}, Author = {Carpenter, S. and Kitchell, J. and Cole, J. and Pace, M.}, Publisher = {Environmental Data Initiative}, Title = {Cascade Project at North Temperate Lakes LTER Core Data Phytoplankton 1984 - 2015 ver 5}, Year = {2022}, Doi = {10.6073/pasta/05074f1e58c54e2f71b0b3774e9a90bc}, Url = {doi.org/10.6073/pasta/05074f1e58c54e2f71b0b3774e9a90bc}, Language = {English}, Version = {5} }