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Measuring buoys were installed on 19 lakes in the North German lowlands, which are more or less strongly connected by rivers and canals. The small platforms measure about two and a half meters and record values from water and air. | Image: CONNECT/IGB


Remote sensing data could make it easier to monitor and protect lakes in the future

The CONNECT project, coordinated by IGB and involving seven partner institutions, started out in May 2019 with the collection of data, expected to take until the end of 2020. In an interview, Stella Berger and Sabine Wollrab report on the first results, and explain why it is particularly interesting to work in a multidisciplinary team, and how this benefits the project. ... [»]


«My focus is on greenhouse gases»

Katrin Kohnert already dealt with greenhouse gases in her doctoral thesis. She wanted to know how much of the climate-relevant gases are released by permafrost regions in the Arctic. Since January 2019, she has been working as a postdoctoral researcher in the CONNECT project at IGB Stechlin. Here, too, she is responsible for the measurement of greenhouse gases and records both carbon dioxide and methane. ... [»]


What the water colour says about the water quality

With the help of two mobile phone apps, Igor Ogashawara and Lena Mellin want to assess the water quality of lakes considering their water colour. In an interview, they explain how these apps work and why remote sensing is so useful for their research. ... [»]


Light or heavy oxygen?

In order to characterise a lake comprehensively, it is also necessary to understand the material flows. Dr. Alexander Frank from the GeoZentrum Nordbayern at the University of Erlangen-Nuremberg is particularly interested in oxygen fluxes, i.e. how much oxygen aquatic algae release during photosynthesis and how much of this oxygen is directly reused by the algae and other aquatic organisms. Since both processes affect the isotope composition of the dissolved oxygen in different ways, the microbiologist uses a method to analyse the isotope signature. ... [»]


Exploring the water quality of lakes from a distance

A number of scientists from Spain, Australia, England and the USA, whose special interest lies in remote sensing, have joined the limnologists permanently working at the LakeLab for this year's experiment. Their aim is to provide reliable information on the quality of water bodies based on the water colour. They use measurements collected by satellites, airplanes or drones and interpret them with the help of computer models. ... [»]


River-lake systems in focus

Aquatic ecosystems suffer disproportionately from anthropogenic pressure and the effects of climate change. According to the EU Water Framework Directive, lakes along river systems in particular are currently in poor ecological condition. How similar are lakes that are more or less strongly connected by rivers and how do algal blooms spread along lake chains? These and other questions are being investigated by an IGB research team led by Stella Berger and Sabine Wollrab together with other partners from remote sensing and landscape ecology. The project "CONNECT – Connectivity and synchronisation of lake ecosystems in space and time" is financed by the Leibniz Association. ... [»]


Artists in Residence at the IGB: The Stechlin as inspiring film location

How can you make lakes and their largely hidden internal worlds come alive? Bosnian film director Dane Komljen has been dealing with this question for quite some time. For his feature film project he was able to win camerawoman Jenny Lou Ziegel and producer Zsuzsanna Kiràly. As "Artists in Residence" of the Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB), the filmmakers will be filming at Stechlinsee and the IGB LakeLab in June. ... [»]


Journalist rush on the LakeLab

As if they had arranged to meet, a television team and a radio reporter, both from rbb, visited the LakeLab today. The team around Boris Römer filmed a video for the evening television series zibb - Zuhause in Berlin & Brandenburg (At home in Berlin & Brandenburg) and Bernd Dreiocker recorded the original sounds for a feature on rbb kulturradio. ... [»]


Light or shadow

How do the conditions set in this year's LakeLab experiment, i.e. skyglow and brownification, affect macrophytes and periphytons? This question is investigated by Ivana Trbojević from the University of Belgrade. The Serbian researcher spends a good four weeks at Lake Stechlin to strengthen the LakeLab team. ... [»]


Mixotrophic organisms - quite flexible

Ulrike Berninger, Professor of Ecology at the University of Salzburg in Austria, has long been interested in mixotrophic plankton. This refers to the small organisms floating in water that combine the properties of both zooplankton and phytoplankton. Depending on the environmental situation or individual requirements, these unicellular organisms can either take up food particles via phagocytosis or carry out photosynthesis using sunlight. Together with her bachelor student, Elisabeth Schlager, Ulrike Berninger is investigating in this year's LakeLab experiment whether the mixotrophic plankton is influenced by the altered light conditions in the enclosures. ... [»]


It is impossible to decline such a summer job

When the four students of the TU Berlin heard that IGB would be looking for student assistants for this year's experiment at the LakeLab, they soon became alert. From mid-July to mid-October, Natascha Bürks-Arndt, Tobi Block, Paul Stolz and Markus Zömisch are now joining the LakeLab team. ... [»]


Introduction of fish into the LakeLab

Fish are an important element in the food web of lakes. This also applies to the experimental enclosures of the LakeLab. However, in this case, the number of fish must be controlled so that the results from the individual cylinders can be compared with each other. Because fish from the lake repeatedly jump into the enclosures, all fish must first be removed with nets from the cylinders before starting a new experiment. Today, 5 small perch were released into each enclosure for this year's LakeLab experiment. The LakeLab team got help from Milan Riha and Jan Hlavac, fish experts from the Czech Republic. ... [»]


LakeLab experiment 2018 started

The summer experiment at the LakeLab was started today traditionally with a hypolimnic sparkling wine. More than 70 researchers from 16 different nations will participate in the large-scale experiment this year. They examine how a changed light regime affects the organisms in the lake. ... [»]


LakeLab Summer Experiment 2018

As energy supplier and stimulus of the internal clock, light is of fundamental importance to plants and animals. This also applies to fish and microscopic organisms in lakes. Like other species, they have adapted to the day-night rhythm during evolution. But what happens if a lake is illuminated by artificial lighting at night, or if not enough light penetrates into the water during the day? These questions are examined during this year's summer experiment at the Lake Lab. ... [»]


The Wissenschafts-Pressekonferenz on the LakeLab

Today, 15 journalists of Germany’s association of science journalists "Wissenschafts-Pressekonferenz – WPK" visited IGB Stechlin. Founded in 1986, the mission of WPK is to promote quality science journalism. As part of their annual meeting, which took place in Berlin this year, the science journalists also came to Lake Stechlin. They wanted to learn more about the LakeLab and the research at IGB. ... [»]


Stechlin Swings now mounted in all 24 enclosures

So far, 15 of the 24 enclosures of the LakeLab were equipped with the Stechlin Swing. These tarpaulins help to prevent algal growth on the inner walls of the cylinders. Since all 24 enclosures are needed in this year’s summer experiment, today the remaining 9 cylinders were furnished with the Stechlin Swings. ... [»]


Knowable Magazine reports on the LakeLab

Nocturnal light pollution is currently one of the hottest topics in ecological research. Now, Knowable Magazine, the digital publication of the renowned journal Annual Reviews, reports in a detailed article about the various research advances on the topic. It also describes the experiments on the effects of skyglow at the LakeLab. ... [»]


Sampling during the ice experiment

The sunny sky greatly improved the sampling campaign which took place today. It is part of the ice experiment lead by Stella Berger that is currently running at the LakeLab. Before the scientists were able to determine water transparency with the Secchi disk and to collect ice, water and plankton samples, holes had to be cut into the ice. ... [»]


At last winter at Lake Stechlin

The IGB team around project leader Dr. Stella Berger has been waiting quite a while for these cold temperatures. The scientists were ready to start the scheduled ice experiment at the LakeLab. Now their time has come: Ice forms on Lake Stechlin as well as in the enclosures of the LakeLab. Since ice cover duration of lakes is modified due to climate change, the scientists want to explore the consequences of such ice cover shifts for lake ecosystems. ... [»]


Nature reports on the LakeLab

For her investigations on the topic of light pollution, the British journalist Aisling Irwin also came to Berlin and Lake Stechlin. She wanted to know more about the IGB research project "Illuminating Lake Ecosystems - ILES" taking place at the LakeLab. It examines how nighttime skyglow affects lakes and aquatic organisms. Together with the co-leaders of ILES, Mark Gessner and Franz Hölker, Aisling Irwin discussed the issue. Now her article has been published in the renowned journal Nature. ... [»]