Nitrogen Cycling in Climate-impacted Lake Mesocosms (NCyCLMe)

Mark J. McCarthy, Shannon M. Collin, Erik Jeppesen, and Silvia E. Newell Wright State University, Department of Earth and Environmental Sciences Dayton, OH USA Cyanobacterial harmful algal blooms (cyanoHABs, also known as blue-green algae blooms) are a global problem, fouling water with surface scums and toxins. CyanoHABs are caused by excess nutrient loading (phosphorus and nitrogen) from fertilizer and/or wastewater. Historically, research and management efforts have focused on reducing phosph… Read more »

SYKE Marine Research Centre opens Indoor Mesocosm Facility for international access during 2019

SYKE Marine Research Centre will open our brand new Indoor Mesocosm Facility for international access during 2019 through the Transnational Access procedure of the H2020 project AQUACOSM. Please feel free to spread the news to potentially interested researchers within your networks. We welcome you to do a research visit to our premises in Helsinki, Finland! All expenses regarding travel, daily allowance covering board & lodging in Helsinki, plus minor expenses in doing experimental work will… Read more »

Weathering of polymeric particles in semi terrestrial environments – a mesocosm study with PVC

Unique and highly diverse properties of plastics, their easily processing and the low production costs have lead steadily increasing plastic production reaching 322 million tons worldwide in 2015. Plastics have delivered many benefits to society in various sectors; however global plastics pollution is a consequence of unsustainable use, uncontrolled and inadequate plastic disposal and waste management. Enhanced performance and persistency of plastic products is achieved by additives, such as pla… Read more »

TA access at the Artificial Pond and stream system of the Umweltbundesamt in 2018

Project title: Metformin Transformation in a Large Scale Artificial River System Project acronym: TransMet Project duration: May to August 2018 Metformin is one of the most commonly prescribed antidiabetic pharmaceuticals on the global scale and recent studies indicate that metformin might cause endocrine disrupting effects in fish. It enters the waste water untransformed as it is no metabolised in humans. In addition, wastewater treatment plants are not designed to remove pharmaceuticals like m… Read more »

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 »