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The Global Lake Ecological Observatory Network (GLEON) is supported in part by the National Science Foundation (NSF) under Grant Number DBI RCN 0639229 and MSB 1137327, 1137353 and other generous donors. This blog receives technical support from the Center for Limnology (CFL) at University of Wisconsin-Madison and Cary Institute of Ecosystem Studies. Any information, opinions, findings, and conclusions or recommendations expressed in this blog are those of the individual author(s) and do not necessarily reflect the views of NSF, CFL, Cary Institute, GLEON or GLEON Student Association (GSA).
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U.S. Environmental Protection Agency’s 2012 National Lakes Assessment: data now available online

The U.S. Environmental Protection Agency (EPA) released the 2012 National Lakes Assessment (NLA) data in December, which are now publicly available online.

Every five years, the EPA launches a comprehensive sampling campaign, where together with state and local governments, tribes, and many other agencies, they sample over 1000 lakes and reservoirs (hereafter, together referred to as waterbodies) across the United States. The final set of waterbodies that are sampled are selected randomly using a statistical survey design to appropriately sample waterbodies that are representative of the U.S. waterbody population across multiple size classes. The first comprehensive survey conducted by the EPA was in 2007, and so this represents the second survey. Approximately 400 waterbodies were resampled in 2012, and approximately 600 were newly sampled waterbodies.

Lakes and reservoirs sampled in the 2012 EPA National Lakes Assessment.

Lakes and reservoirs sampled in the 2012 EPA National Lakes Assessment.

For each sampled waterbody, there are a diverse suite of variables collected and analyzed such as: waterbody morphometric characteristics, lakeshore land use, profiles of e.g. temperature and dissolved oxygen, many water chemistry variables, and phytoplankton and zooplankton metrics such as density and biomass at the genus resolution. Field crews follow standardized protocols at each waterbody, and water samples for water chemistry and plankton counts are analyzed at central laboratories, subjected to multiple phases of quality control. (more…)

GLEON Embraces Citizen Science

Photo: Divers participate in citizen science on lake in Belgium. Credit: Laurent Miroult.

Divers from Project Baseline Muisbroek, Ben van Asselt and Koenraad van Schuylenbergh, retrieving tea bags in Lake Put van Ekeren, Belgium. (Photo by Laurent Miroult courtesy of NETLAKE.)

A new citizen science working group formed in July at the most recent all-hands meeting of the Global Lake Ecological Observatory Network (GLEON) in Gaming and Lunz, Austria. With the official end of the Networking Lake Observatories in Europe (NETLAKE) EU COST Action this year, the working group activities under GLEON’s sister network in Europe found a new home by merging with ongoing initiatives in GLEON. What had been an adhoc group on citizen science in GLEON became a full-fledged working group this summer with several joint projects already underway.

“Experience from GLEON demonstrates how citizens contribute to the formulation of new research questions about their lakes as well as how research scientists are embracing citizen science in the network,” said Kathleen C. Weathers, co-chair of GLEON, and G. Evelyn Hutchinson Chair in Ecology at the Cary Institute of Ecosystem Studies in Millbrook, NY. “With the establishment of a new working group, GLEON members are not only embracing citizen science but actively designing and implementing
projects.”
(more…)

Spring Blitz: A Collaborative GLEON Research Project

Photo: GLEON research on Lake Annie, FL.

Emily Nodine sampling on Lake Annie, Florida.

By Elizabeth Ryder and Lisette de Senerpont Domis

In spring 2013/2014, GLEONites from the Northern and Southern Hemispheres undertook a challenging spring sampling campaign called Spring Blitz. This Global Lake Ecological Observatory Network (GLEON) project was a coordinated effort from researchers around the world to study and link changes in water column stability to plankton diversity during the onset of stratification. Spring Blitz makes use of the GLEON network of sensors in lakes with differing stratification regimes and was the focus of several graduate student PhD theses at Lake Erken, Mt Bold Reservoir and Milltown. (more…)

Carbon Cycling on Lakes (COCLAKE) Project: the Story of Brazil-Denmark Collaboration via GLEON

by Ludmila Brighenti

A lake is like a gigantic living creature that inhales and exhales carbon and exchanges energy with its surrounding environment. I became interested in this process and wanted to understand and predict whole-lake carbon exchange systems in Brazilian lakes. I worked on this topic for my Ph.D. (which I completed recently!), and deployed a high-frequency monitoring buoy to obtain data. This led to a new collaboration between researchers in Brazil and Denmark: Carbon Cycling on Lakes (COCLAKE), looking at the similarities and differences of temporal and tropical lake carbon cycling systems. All of this started from a simple conversation at a GLEON meeting. With the GLEON 16 meeting fast approaching, I wanted to share my story for those who are attending.

Location of Lakes Carioca and Dom Helvécio, State Park of Rio Doce, Minas Gerais state, Brazil.

Location of Lakes Carioca and Dom Helvécio, State Park of Rio Doce, Minas Gerais state, Brazil.

(more…)

SAFER Students Work Project: a Sampling of the Diversity of Research Interests

By Paula Costilla, Paula Zapperi and Facundo Scordo

SAFER (Sensing the Americas’ Freshwater Ecosystem Risk from Climate Change) is an inter-American, interdisciplinary network integrated by researchers, students and technology support. Geology, biology, paleolimnology, hydrometeorology, physical limnology and social sciences are all applied as tools for the evaluation of project objectives, and this diversity is reflected in the SAFER student projects.

Most of the SAFER students have participated in one or more Global Lake Ecological Observatory Network (GLEON) meetings, and since they will attend GLEON 16, this article is focused on their present research interests.

Gráfico1 (more…)