Patterns and impacts of cyanobacteria in a deep, thermally stratified, oligotrophic lake

Abstract

Cyanobacterial blooms are a concern in oligotrophic lakes because these systems are often used for multiple purposes (i.e., recreation and public water supplies). Monitoring cyanobacteria impacts is challenging in such cases because of low and heterogeneous concentrations over time, space, and depth. Canandaigua Lake (New York State) is oligotrophic, but has been impacted by blooms since at least the early 2000s, with limited quantification. This study integrated data from established shoreline surveillance and inter-agency monitoring programs to connect lake processes and evaluate use impacts. Surveys

Mapping Water Clarity in Small Oligotrophic Lakes Using Sentinel-2 Imagery and Machine Learning Methods: A Case Study of Canandaigua Lake in Finger Lakes, New York

“…However, this does not imply that this pattern will occur every year. For instance, a study recently published on Canandaigua lake, indicates higher water clarity for October 2019 [64] which contradicts from our observations. However, it is important to note that the maps generated in our study are based on a single day and not representative of the monthly average.…”

“…However, it is important to note that the maps generated in our study are based on a single day and not representative of the monthly average. The authors in [64] do report higher water clarity in June which aligns well with our observations. Whereas the lower water clarity reported in that study is on Aug 22 and Sep 02 for the year 2019.…”

Characterizing the Impact of Cyanobacterial Blooms on the Photoreactivity of Surface Waters from New York Lakes: A Combined Statewide Survey and Laboratory Investigation

“…From a methodological perspective, incorporating cyanobacteria-specific spectral evaluations from satellite remote sensing , presents a promising approach for (re)constructing regional, long-term photochemical data sets at scales challenging for ground-based lake monitoring initiatives such as CSLAP. High-resolution sampling at specific lakes of interest, , on the other hand, should provide a more integrated picture of how transient spatiotemporal heterogeneity and cyanobacterial community succession shape the photoreactivity of DOM. Overall, our work represents a step forward in understanding the implications of cyanobacterial blooms for surface water photoreactivity in the context of a changing climate. , …”

Introduction to the topical collection on harmful algal blooms

“…The study concluded that a combination of rapid bloom identification and effective treatment processes are needed to protect water quality for systems using sources vulnerable to algal blooms. Prestigiacomo et al (2023) conducted an extensive study in Canandaigua Lake, located in the state of New York, to quantify cyano-HABs indicators and understand the role of various factors on the formation and effects of cyano-HABs. Canandaigua Lake is an oligotrophic, thermally stratified lake that in recent years has experienced formation of HABs, which is a great concern since the lake is used for recreational activities and as a source of drinking water supply for thousands of people.…”