Atmospheric deposition in the sea: is it manna from heaven?

If you go to the coastline and look far away at the open sea, you will notice the beautiful scene of the sky and the sea to be connected. Even from the early days of our planet, the atmosphere and the oceans were in constant and close connection, exchanging gases and particles, and we can now say that their current form is mainly due to their 4-billion-year relationship. We know that the deposition of atmospheric particles is an important source of macro-nutrients and micro-trace elements in the… Read more »

Joint AQUACOSM-plus and JERICO-S3 study on Baltic Sea heatwaves

Climate change is causing increasingly frequent heat waves, which not only hit land areas, but also coastal seas. An increase in the water temperature affects the life of plankton and the pathways of nutrients and carbon. Because of the sporadic nature of the heatwaves, their effects are hitherto poorly known. Studying their multifaceted and complex effects on coastal seas requires an interdisciplinary approach. IFCB plankton image   Long-term coastal observations and the use of novel senso… Read more »

AQUACOSM-plus explainer video: What is Transnational Access?

The primary objective of Transnational Access (TA) is to provide access to more than 60 different leading and highly complementary mesocosm facilities located at 28 AQUACOSM-plus partners throughout Europe. The AQUACOSM-plus mesocosm facilities represent a cross-section of European aquatic ecosystems ranging from Sub-Arctic to the Mediterranean, from mountains to lowlands, from freshwater to marine, and from ultra-oligotrophic to hyper-eutrophic conditions. Between 2021 and 2023 AQUACOSM-plus wi… Read more »

Fish and Oxygen-induced Alterations to the Migration of Zooplankton (FOAMZ)

The depletion of oxygen from bottom waters (hypolimnion) of lakes and reservoirs is becoming more frequent because of climate change and eutrophication. Low dissolved oxygen (hypoxia) can release nutrients from sediments and degrade water quality, alter animal behaviour and food web dynamics, and ultimately, alter lake ecosystem function. Zooplankton influence ecosystem processes, including nutrient cycling and trophic transfer. They also commonly exhibit diel vertical migration (DVM), where the… Read more »

Effects of consecutive heat waves on the resistance, resilience and recovery of marine plankton communities (Heat Waves)

Marine systems are facing an increase in the frequency of extreme events and especially climate change scenarios foreshadow the increase of heat waves in the future. Increasing heat waves can alter planktonic diversity, interactions between different groups, and key processes. According to modelling forecasts for the future increase in the frequency of heat waves, an in situ mesocosm experiment is currently being conducted (end of April and May 2022) at the CNRS-MEDIMER infrastructure (city of S… Read more »

A Brownification experiment in Crete, Greece

In June 2021, an international mesocosm experiment (Codenamed “BrownMed”) took place at the CretaCosmos mesocosm facility of the Hellenic Centre for Marine Research in Crete, Greece. The BrownMed experiment was part of the Joint Mesocosm Experiment (JOMEX) organised by the H2020 AQUACOSM project. In this experiment, the brownification of the various aquatic ecosystems was studied. And when we say various, we mean various! From lakes in Central Europe to estuaries and coastal marine systems in th… Read more »

Long-term lake warming experiment meets short-term heatwave

In the summer of 2021, in a respite from the restrictions of the pandemic, the team at the Aarhus University Lake Warming Mesocosm Experiment (LWME) managed to run a heatwave experiment with support from the EU H2020 project AQUACOSM-plus. The LWME has been running at the department of Ecoscience at Aarhus University since late 2013. The experiment was part of the AQUACOSM project and is now part of the AQUACOSM-plus network. It is also contributing data to a number of other national and interna… Read more »

Do you need a low-cost, low-weight, and easily-transportable mesocosm platform?

In AQUACOSM-plus, we develop one… Many systems for mooring mesocosms are very rigid, immobile and/or usually very expensive. This limits the capacity to investigate ecological and socio-economical impacts on various aquatic systems on regional to international scales, especially if mesocosm infrastructures are not available at these sites. Hence, it is important to develop a flexible and cost-effective system for mobile use in different locations, in a way to allow testing a wide range of ecol… Read more »

Comparative double-mesocosm carbon experiment throughout the sub-arctic winter, Umeå, 18 Feb 2022

After the last snow fall, several decimetres of snow now cover the 40 cm thick ice at the northern Baltic Sea mesocosm site. Nine of the new AQUACOSM mesocosm units, developed during the previous AQUACOSM-project and frozen into the ice, are compared with the indoor mesocosm system at the Umeå Marine Sciences Centre, Umeå University. Ice cover can also be formed in the indoor system. Since the end of November last year, both systems have been amended with carbon in the form of HuminFeed and a so… Read more »

Effect of decreasing inorganic N:P ratio on the plankton community – INN:PP

Our mesocosm experiment is aimed at understanding the effect of the decreasing inorganic N:P ratio on the plankton community of the Baltic Sea. It was held for three weeks, from 5th until 23rd of June 2021, at the facility of Tvärminne Zoological Station of the University of Helsinki (Finland). The core group. Standing from left: Cristian Villena-Alemany (Institute of Microbiology, Centre ALGATECH, Czech Academy of Sciences), Mari Vanharanta (SYKE: Finnish Environment Institute), Kasia Piwosz (N… Read more »