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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…)

Lake Annie’s Song: A TEDx Talk and Interview with GLEON’s Evelyn Gaiser

A recent TEDxFIU event kicked off with Global Lake Ecology Observatory Network (GLEON) member Evelyn Gaiser’s unexpected discovery that her two passions, science and music, could come together to help her better understand data. Evelyn’s interpretation of the year-round daily temperature changes in Florida’s Lake Annie formed the basis for her TEDx talk.

Caption: Lakes write music. Science is listening. | Evelyn Gaiser | TEDxFIU

Evelyn is a classically trained musician, so when she visualized the temperature data collected from Lake Annie she also saw a musical score. By assigning the data points a musical note, she composed Lake Annie’s song. The piece was then arranged by Marcus Norris and performed by Yaniv Cohen, Aryam Gonzalez and Tomas Lopez, all members of the School of Music on the TEDxFIU stage.

“Music seems uniquely suited to expressing the nuances of nature,” Gaiser said in an FIU News report about the event, noting a growing trend of scientists and musicians around the world coming together to explore the complexities of nature in this way. (more…)

Samiullah Khan, New Co-Chair Elect for the GLEON Student Association

Photo: Sami Khan at Lake Quramber Bathy, Ghizer, GB. Credit: courtesy of Sami Khan.

Samiullah Khan during the first ever bathymetric survey of Lake Quramber (a.k.a Karumber), District Ghizer, GB, Pakistan. (One of the world’s high altitude biologically active lakes; elevation: 14301 feet).

By Samiullah Khan

I was recently offered and readily accepted the co-chair elect position of the Global Lake Ecological Observatory Network (GLEON) Graduate Student Association (GSA), joining chair, Blaize Denfeld (Umeå University, Sweden) and co-chair Jonathan Doubek (Virginia Tech, USA). As a new member of the team, I would like to introduce myself and mention in brief my past and present professional and academic involvements. (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…)

Revisiting GLEON’s 18th All-Hands Meeting in Gaming, Austria

By Jonathan Doubek

GLEON 18 was hosted at Kartause, a historic monastery in Gaming, Austria.

GLEON 18 was hosted at Kartause, a historic monastery in Gaming, Austria.

GLEON’s 18th All-Hands Meeting and joint meeting with NETLAKE was held from 4-8 July, 2016 in Lunz & Gaming, Austria. There were approximately 140 individuals who attended the meeting; about 60 percent of the participants were faculty, scientists, and/or staff and 40 percent were students and postdoctoral researchers. 33 countries were represented, spanning 85 institutions. The meeting consisted of a diversity of GLEONites and NETLAKE’ers, and for 40 percent of the participants, this was their first All-Hands meeting. (more…)

A Preview of the GLEON 18 Meeting in Austria

By Samiullah Khan and Jonathan Doubek

The Global Lake Ecological Observatory Network (GLEON) all-hands meeting in Lunz & Gaming, Austria is fast approaching! The host team has been busy preparing the conference site, as well as organizing the daytime and evening activities. This blog post is to give you a historical and research perspective of the conference site and let you know what to expect at GLEON 18.

Lake Lunz Background

Lake Lunz is oligotrophic lake of a glacial origin located in the small town of Lunz am See, 120 km southwest of Vienna in the foothills of Austrian limestone. Lunz am See is part of the Eisenwurzen region, which is historically famous for iron ore mining since the time of Celtic and Roman, and later Habsburg Empires. The area is also known as the coldest place in Central Europe. The lowest temperature recorded was -56.2 oC in 1932. History reveals that Lunz am See has been part of Austria since the country was founded in 976, which was later purchased and bestowed to the monastery of Gaming by Duke Albercht XI.

Photo: Lake Lunz buoy.

Lake Lunz buoy (in-situ lake monitoring platform).

Lake Lunz is vernacularly called Lunzer Untersee (Lower Lake), which is due to its altitudinal relation to two small neighboring lakes, Mittelsee (Middle Lake) and Obersee (Upper Lake). Lake Lunz’s surface area is about 1 km2 with max and mean depths of 33.7 m and 20 m, respectively. The lake has approximately 27 km2 of uninhabited catchment area that consists of karstic plateau and is densely forested by Norway spruce and European beech. The area is very famous for tourism, and the main tourist attractions during summers are sport fishing, swimming, walking around the lake, hiking to the upper lakes and the famous summit peak of Dürrnstein, and skiing during winters. (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…)

Welcomed, Valued, Engaged, & Inspired: Thoughts from a 1st-time GLEONite

Photo: GLEON network partners. Credit: Lisa Borre.By Kait Farrell

Going in to the GLEON17 meeting, I had no idea what to expect. Prior to my arrival in Korea, my only involvement with Global Lake Ecological Observatory Network (GLEON) had been through the fellowship program, and I wasn’t sure whether my experience led by Paul Hanson, Kathie Weathers, Hilary Dugan, and Grace Hong would be representative of the whole GLEON group. I needn’t have worried. Looking back on my first GLEON meeting, four words come to mind: welcomed, valued, engaged, and inspired.  (more…)

A Note from Newly Appointed GSA Leader Blaize Denfeld

Photo: Blaize Denfeld under ice lake research. Source: Blaize Denfield.

GSA co-chair elect Blaize Denfield conducting under ice lake research in Sweden.

By Blaize Denfeld

I gratefully accepted a recent appointment as co-chair elect of the Global Lake Ecological Observatory Network (GLEON) Graduate Student Association (GSA), the newest member of the GSA leadership team, joining GSA chair, Jennie Brentrup (Miami University, USA) and co-chair Facundo Scordo (Universidad Nacional del Sur, Argentina). One of my first assignments is to briefly introduce myself to the GLEON community. (more…)

2015 GLEON Fellowship Program at Lake Sunapee

By: Kait Farrell, Sarah Lynn Bartlett and Ian McCullough.

Photo: GLEON fellowship program 2nd Cohort. Credit: LSPA.

Back row (from left to right): Paul Hanson, Jonathan Doubek, Derek Roberts, Sam Burke, Nick Skaff, Facundo Scordo, and Ian McCullough. Middle row: Hilary Dugan, Jamie Summers, Kait Farrell, Sarah Barlett, and Flora Krivak-Tetley. Front row: Zutao Yang, Kathie Weathers, Mindy Morales and Grace S. Hong.

It was a dark and stormy night. Well not exactly stormy, but it had been dark since 5 pm and was exceptionally cold (mostly for those joining the group from warmer areas of the world); nothing but a typical January evening in central New Hampshire. It was the night following the fourth and final day of the Global Lake Ecological Observatory Network (GLEON) Fellowship Program workshop at Lake Sunapee, New Hampshire, a quaint lake side community largely dormant for the winter.

(more…)