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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…)

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…)

Undergraduate Research Focus at NE GLEON Regional Conference

By Blaize Denfeld

The 2nd Annual NE GLEON conference held at the Cary Institute of Ecosystem Studies in Millbrook, NY, from April 15-17, gave students and professors representing 11 universities and colleges in northeastern North America the opportunity to experience a “mini” version of a GLEON all-hands meeting. Although undergraduates were the focus of the weekend meeting, comprising nearly half of the 32 participants, graduate students and faculty members also gathered to share data and plan regional research activities for the coming year.

Photo: NE GLEON Participants. Credit: L. Borre.

NE GLEON participants included 15 undergraduates, eight graduate students or early career scientists, and nine faculty advisors or research scientists. A full list of participants’ names and affiliations can be found at the end of the post. (Photo credit: L. Borre)

“I had the amazing opportunity to attend the regional NE GLEON conference. There were several students from various institutions with a wide array of majors, backgrounds, and interests. Although this was my second time attending a NE GLEON meeting, I was still greeted with enthusiasm, almost like being reunited with old friends,” said Brian Kim, an undergraduate student from Colby College in Maine. (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.

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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…)

GLEON Fellowship Program: Looking Forward, Looking Back

By Jake Zwart and Hilary Dugan

As this is a transition period for the GLEON Fellowship Program, it is a good time to reflect on the past cohort and look towards the next group of fellows. The third and final workshop for the first cohort took place at the Cary Institute of Ecosystem Studies in Millbrook, New York, USA in January 2014. The fellows could not help but feel the ecosystem perspective oozing from the walls of the Cary Institute, soaked up from years of housing an abnormally high concentration of ecosystem ecologists.

Home institution locations of GLEON Fellowship Program participants. (Map credit: Jake Zwart)

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GLEON Buoy Data Used in a Variety of Ways

Recent Bard Center for Environmental Policy (CEP) graduate Alicia Caruso delved deeply into the uses of GLEON data and found that high-frequency buoy data is being shared widely, and a new collaboration with database managers may improve data accessibility to promote greater collaborations with a broader audience of GLEON members and local lake managers. As part of a master’s thesis project, Alicia aimed to answer several questions relating to GLEON and the uses of high-frequency data collected on GLEON buoys worldwide. These include questions on what is currently happening with the data that GLEON is collecting, how it can be used, what benefits and challenges are involved with communicating these data both within the organization and with non-academic users, and how that communication could be improved. Answers to these questions were determined through the use of surveys and interviews.

Photo: GLEON buoy in Lake Taihu. Credit: Alicia Caruso.

GLEON buoy in Lake Taihu. Photo credit: Alicia Caruso.

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