Chemostats are bioreactors used for cultivation of phytoplankton and/or zooplankton. They can be operated as batch (no dilution rate), as chemostat (fixed dilution rate) or as turbidostats (dilution rate dependent on turbidity). They can be operated as open or closed system, and also axenically.

The aquatic laboratories facilitate researchers working with aquatic samples, sediments or organisms. They include laboratories with specialised equipment for aquatic analyses, dedicated rooms for controlled experiments, and they give access to separate storage areas for field equipment, sample storage, chemicals and disposables stocks.

The Netherlands Institute of Ecology (NIOO-KNAW) houses 8 long glass aquaria (180 x 40 x 40 cm in length x width x height, 288L) and 24 shorter glass aquaria (90 × 50 × 50 cm in length x width x height, 225L). The aquaria can be kept at different temperatures which can be controlled by an automatic control system (Cascade Automation Systems, Ridderkerk, the Netherlands).

Here, we use a latitudinal gradient spanning 3,000 km across Europe to examine bacterial and fungal communities in the rhizosphere and surrounding soils of range-expanding plant species. We selected range-expanding plants with and without congeneric native species in the new range and, as a control, the congeneric native species.

A total of 40 mesocosms are distributed in five rows of eight mesocosms with a spacing of 0.5 m between them. In spring/summer we grow plant species that are currently expanding their range within Europe and species that belong to the same genus while being native in the Netherlands.

Nematode communities play an important role in soil ecology research. To analyse different type of plant-soil nematodes, NIOO has a facility for extracting soil and root nematodes by Oostenbrink funnel and mistifier.

The ecotron consists of 60 cilinders with intact (non-disturbed) sand, peat or sea clay cores (20 each). For each soil treatment, ten of the cilinders are inoculated with soil from species-rich grassland with the same soil type. The other ten are inoculated with sterile soil from the same grassland. The cilinders are buried in an experimental garden.

NIOO has a collection of thousands of bacterial strains isolated from different (semi-)natural and agricultural environments. Most are bacteria isolated from soils, rhizosphere or plant parts, but aquatic strains are present as well.