Mantel – Are rehabilated systems more resilient to extreme climatic events than non-rehabilated systems. Project lead: Lisette De Senerpont Domis. 01/04-31/07 2018
We are planning a 4-month experiment for April-July 2018 within the Marie-Curie-ITN MANTEL program. We will investigate whether rehabilated systems are more resilient to extreme climatic events than non-rehabilated systems. The extreme climatic events we will mimic are extreme precipitation events, and extreme heatwaves. We will use phosphorus sorbents to geo-engineer our initial eutrophic starting conditions.
The facility will also be open for participation of external users approved by AQUACOSM TA as of January 1, 2018 to the end of 2018 to perform their own research ideas. We also welcome collaboration outside the Transnational Access provision.
We welcome microbiologists, molecular biologists, biogeochemists, and aquatic ecologists in general to participate in our extreme event experiment, and to come up with additional experiments. The facility will be open for participartion of external users as of April 1, 2018.
At least 300 person days will be allocated to external users in 2018 of AQUACOSM Transnational Access provision. Access will be offered to a minimum of 10 persons for 30 days or other constellations.
Netherlands Institute for Ecology (NIOO)
6708 PB Wageningen
indoor/outdoor – pelagic – freshwater
Limnotrons, outdoor enclosure facility, 36 experimental ponds
Wageningen, The Netherlands
The Limnotrons at the Netherlands Institute of Ecology (NIOO) are 9 x 922 l (each 0.97 m diameter; 1.32-1.37 m length) indoor mesocosms made of stainless steel (Fig. 6.3.1). They provide an exceptional level of environmental control. Temperature regulation by separate upper and lower temperature blocks enables the manipulation and control of thermal stratification in each individual Limnotron. A constant water level can be maintained with a refillable expansion vessel to compensate for evaporation and sampling losses. Complicated temperature scenarios can be realized by means of a powerful temperature programme. This includes the possibility to simulate episodic events. Temperature is logged every minute. CO2 levels can be manipulated by providing different CO2-air mixtures with a WITT KM60- 2ME gas mixer. High-intensity light supply and the option to include a 15-cm sediment layer allow for macrophyte growth. The Limnotrons can be closed with a removable lid, gently mixed with an impeller (which also prevents extensive periphyton growth on the Limnotron walls) or an oscillating grid (enabling cyanobacterial scum formation). The Limnotrons are particularly useful to assess effects of warming and CO2 on carbon cycling; the stoichiometry of trophic groups; nutrient balances; ecosystem metabolism; and the adaptation microevolution and community structure of phytoplankton, zooplankton, macrofauna, periphyton and macrophytes.
Fig. 6.3.1. Schematic (left) and photo (right) of Limnotrons in The Netherlands. Photo: NIOO-KNAW
Advanced analytical equipment, including a number of flow cytometers (e.g. flowcytometry, Cytobuoy, FlowCam, IRMS, molecular lab), which use laser technology to identify, count, and sort algae, bacteria, and protozoa at high speed.
At least 900 person days will be allocated to external users in years 2-4 of AQUACOSM Transnational Access provision. Access is offered to a minimum of 10 persons for 30 days each year.
Services currently offered by the infrastructure: Individual external users and user groups will have access to the full range of facilities at the NIOO. These include: fluorescence microscopes; autoanalyzer for dissolved nutrient;, multichannel probes for simultaneous measurements of oxygen, light, pH, conductivity and temperature; a PhytoPAM fluorometer; Coulter particle counter; Flow cytometers for the analysis of phyto- and bacterioplankton (<90 or <250 μm particle size), FlowCAM for automated analysis of large phyto- and zooplankton; elemental analyser to determine particulate C and N contents, Isotope-ratio mass spectrometry (IRMS) to determine the relative abundance of stable isotopes, ICP-MS to quantify trace elements, LC- MS/MS to analyse small organic chemicals such as cyanotoxins, and a modern molecular-biology lab. The facilities are frequently used for experiments by teams of international researchers from different disciplines, including ecologists, microbiologists, biogeochemists, and evolutionary biologists.
Support offered under AQUACOSM: Users will be given full access to the facilities at the NIOO, and receive all training and assistance necessary to operate instruments and facilities before starting and during experiments. At present, the facilities are used by an international multidisciplinary team working on climate change and carbon cycling. This team consist of both internal and external users and is facilitated by a team of highly skilled technicians at NIOO. The laboratory’s broad range of state-of-the-art analytical equipment allows users to tackle innovative, multi-facetted questions, resulting in publications in leading journals. Users will be embedded in an internationally renowned aquatic ecology group providing ample opportunities for networking and large potential for fruitful scientific exchange. The NIOO as a whole (~200 employees) provides an international working community, hosting several world-leading scientists.