Phytoplankton in the mesocosms

Are some species of phytoplankton favoured by turbulent water? For two weeks, an international research team has utilized the mesocosm facility at Umeå Marine Sciences Center (UMF) to study how the movement of the water affects different species of phytoplankton. In Bath, England, the local authorities have problems with large algae blooms in drinking water reservoirs. Tests based on different stirring techniques has been adopted in order to solve the problem. The University of Bath has also ini… Read more »

Impact of Microplastics on food web structure and functions of shallow freshwater lakes at METU Mesocosm System, Limnology Laboratory, Middle East Technical University, Ankara, Turkey

Approximately 311 million metric ton of plastics were produced in 2014 alone, and production is steadily increasing each year. Up to 10 % of the plastic produced each year worldwide ends up in the aquatic environment, where it persists and accumulates. The sources of microplastics include fragmentation of larger items entering by rivers, runoff, tides, winds, and catastrophic events, together with at-sea sources. There are also direct inputs of microplastics as micrometer-sized particles, such a… Read more »

AQUACOSM TA – Effect of Warming on the Mediterranean Plankton Food Web Functioning

A mesocosm experiment at MEDIMEER, Sète, France, April 2018 An in situ mesocosm experiment is currently running (April 2018) as a part of the PHOTOPHYTO project funded by the French National Research Agency (ANR). This experiment focuses on the effects of global warming on the timing of marine phytoplankton blooms taking into account the different interactions between biotic and abiotic components, especially the match/mismatch between predators and prey. The 12 in situ mesocosms are immersed in… Read more »

Tracking the effects of reduced nitrogen loading

A mesocosm experiment at LMWE Silkeborg Denmark 2018 Whilst we know for certain that eutrophication in fresh waters is caused by increased nutrient levels, the relative influence of the two most important nutrients, phosphorus and nitrogen, is the subject of much debate. Recent work has asserted that eutrophication cannot be controlled by reduction in nitrogen, and indeed there have even been suggestions that the addition of nitrate may be an effective way of countering blue-green algal blooms…. Read more »

Transnational Access at SLS – Seeon Limnological Station BIODIVTrainee – Kelsey Lyberger, UC Davis, CA, USA

We welcome our first transnational access trainee, Kelsey Lyberger from UC Davis, CA, USA. Kelsey just arrived at SLS and will work within a field mesocosm experiment. The topic of this experiment is trait-related feedback dynamics in natural plankton communities (DYNATLOSS II). This project is funded by the German Research Foundation (DFG) within the priority program DynaTrait. Biodiversity loss is often accompanied by a loss of traits related to resource use and growth, which are important for… Read more »

Mesocosm facilities for research on marine and freshwater ecosystems

Jens Nejstgaard (project coordinator) explains the importance of mesocosm facilities and why the AQUACOSM project and its facilities are unique. Mesocosms are used to conduct well-replicated large-scale experiments to investigate how entire ecosystems react to different stressors. AQUACOSM is unique in combining such marine and freshwater facilities operating in rivers, lakes, estuaries and the ocean from the Arctic to the Mediterranean. AQUACOSM has more than 37 mesocosm facilities, 21 partners… Read more »

Mitigating a major marine oil-spill: Is in-situ burning (IBS) of oil an option?

A European-funded mesocosm experiment will try to answer It was in the middle of a storm, on December 14th 1907, when the Thomas W. Lawson, a seven-masted steel-hulled schooner, was sank in the Isles of Scilly (UK), releasing 7,400 tonnes of paraffin oil in the sea; an event that is considered as the first large marine oil-spill in history. Since then, it is estimated that approximately 7 million tonnes have been released in the marine environment from more than 140 major spill events, while onl… Read more »

Additional Call for Transnational Access to European Aquatic Mesocosm Facilities in 2018 is OPEN NOW

AQUACOSM offers scientists, students, trainees, enterprises and others Transnational Access (TA) to mesocosm facilities in diverse aquatic environments throughout Europe. This additional call is now open for Transnational Access activities in the second half of 2018 at two AQUACOSM partner facilities: ENS-PLANAQUA – France SYKE-MRC – Finland The application deadline is 30 MARCH 2018 at 13:00 CET. Please see the TA-Calendar-2018-2 and respective mesocosm facilities for information on available lo… Read more »

Aquatic mesocosm research reveals methane emissions from shallow lakes may be significantly underestimated

Evidence from experimental lakes shows the combination of nutrient enrichment and warming has a synergistic effect on rates of methane bubble production and release. The new study is published in the Scientific Journal, Nature Climate: Synergy between nutrients and warming enhances methane ebullition from experimental lakes. Thomas A. Davidson, Joachim Audet, Erik Jeppesen, Frank Landkildehus, Torben L. Lauridsen, Martin Søndergaard & Jari Syväranta, Nature Climate Changevolume 8, pages156–1… Read more »

Release of AQUACOSM App (for Android OS devices)

Have you ever wondered how marine and freshwater scientists experiment with large bodies of water?  Do you want to see how the water microbes look like?  Do you want to know what happens to the sea microbes after a dust storm? We are proud to announce the release of AQUACOSM App for Android OS devices! AQUACOSM is an educational application developed for kids between 6 and 106 years old with interest on science and how it works!  You will learn what is a mesocosm and how scientists perform mesoc… Read more »