Re: Middle East Technical University
Jeanine Baselice
Description of the infrastructures: At Middle East Technical University, Ankara campus, there are two different mesocosm systems which include in-lake floating system named METU Mesocosm System I (MMS I) and on-land buried system named METU Mesocosm System II (MMS II).
METU Mesocosm System II is design to allow researchers to study shallow lake and pond ecosystems ecological structure, functions and diversity under the effects of global grand challenges. Especially MMS II is suitable for studying the effects of salinization on lakes as it is located in in arid Steppe climate where salinization is a major problem.
METU, Mesocosm System II includes 24 mesocosms, with 2m wide and 1.65m in height. They are buried into the ground up to 1m depth and each have 30 cm of sediment (1:1 ratio of washed sand and natural sediment form different lakes). To mimic the presence of wind induced current and prevent thermal stratification, water in each mesocosms is mixed via a pump.Mesocosm System II includes 24 mesocosms, with 2m wide and 1.65m in height. They are buried into the ground up to 1m depth with 30 cm of sediment (1:1 ratio of washed sand and natural sediments from different lakes). To mimic the presence of wind induced current and prevent thermal stratification, water in each mesocosms is mixed via a submersible pump. The mesocosm are fed groundwater.
The system is still under development and we are aiming at equipping some (if not all) of the mesocosms with 1) a programmable, remote controlled electrical heating system, with heating is adjusted in reference to the ambient temperature tanks, sensors for temperature conductivity and dissolved oxygen allowing HF measurements, 3) flow-through-condition with adjustable hydraulic retention time. The mesocosm are arranged in the following configuration and also see the picture.A similar system is established at the Marine Institute in Mersin at the south coast of Turkey.
We are able to measure physicochemical parameters, including water temperature, salinity, electrical conductivity, oxygen, pH, water transparency, alkalinity, suspended solids, color, nutrients (NO3, NO2, NH4, total nitrogen, PO4, and total phosphorus), major ions, and dissolved organic carbon, besides biological communities, such as bacterioplankton, phytoplankton, zooplankton, ciliates, heterotrophic nanoflagellates, periphyton, chlorophyll-a, major photosynthetic pigments, macrophyte cover, fish, and macroinvertebrates as well as metabolism, greenhouse gas emissions (CO2 and CH4), and decomposition.
The Limnology Laboratory, which operates the both METU Mesocosm Systems, is equipped with sampling gear, analytical instruments (e.g. auto-analyser for N, and other nutrient analyses, all kind of microscopes, HPLC, FlowCam, flow-cytometer, sampling gear for water, fish and macrophyte sampling) and a walk-in climate room, METU has a central laboratory facility which is equipped with elemental analyser (particulate C and N analyses), ICP-MS (trace elements analyses), Fourier transform infrared spectrometer (FTIR), as well as modern molecular-biology laboratories.
Support offered under AQUACOSM: Users will be given access to the mesocosm facility as well as the full range of laboratories and instrumentation available at the METU Mesocosm System and METU Limnology Lab. This includes physical, logistic, technical and scientific support. AQUACOSM scientific staff and the task leader will further assist users with supervising and training as well as providing assistance throughout the stay.
Support offered under AQUACOSM-plus: All visitors will have access to the full range of laboratories and instrumentation available at the METU Mesocosm System and METU Limnology Lab, physical, logistic, technical and scientific support will be provided. The AQUACOSM-plus Post-Docs and PhDs, and the project leader will further assist the users with running scientific supervision, training and technical assistance throughout the stay.
Modality of access under AQUACOSM: A total of at least 630 person-days will be allocated to external users during years 2-4 of the AQUACOSM Transnational Access provision. A minimum access for 9 persons is envisaged for 20 days each year. External users will be prioritised for using the mesocosms throughout the AQUACOSM TA activities. To maximise scientific output, efforts will be made to integrate the AQUACOSM TA activities into other projects at the facility. Access to the facility by international scientists has already been rewarded by a publication in a leading ecotoxicological journal.
Modality of access under AQUACOSM-plus: A minimum of 500 person-days will be allocated to external users through TA provided under AQUACOSM-plus. It is anticipated that AQUACOSM-plus will support stays of at least 4-5 persons for 65 days per year in M10-21 and M34-45. To maximise the scientific outcome, efforts will be made to integrate the TA activity with other on-going and planned projects at the facility. International collaboration at METU has already produced a high impact factor publication in addition to publication of the REFRESH project. In 2018, an in- situ mesocosm experiment investigating the impact of microplastics on the littoral food web was carried out with 10 students and scientists supported through TA during AQUACOSM. For summer 2019, METU Mesosystem System are participating in the AQUACOSM-JOMEX experiment with 13 TA participants from Europe and Brazil.
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AQUACOSM-plus (Project No 871081) is funded by the European Commission EU H2020-INFRAIA. The information and views of this website lie entirely with the authors. The European Commission is not responsible for any use that may be made of the information it contains.
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