Freshwater ecosystems offer an especially rich diversity of habitat conditions, plants and animal species. Whether forest ponds, mountain rivers or large lakes – the role of interactions between organisms that live there differ according to the type of water body involved. We explore these complex processes and interactions, including primary production, evolution, food webs, and interactions between parasites and their host.
However, ecosystems are not only habitats – humans also use them for resources, and they are being influenced and shaped by us to an ever-greater extent. For this reason, we consider humans and ecosystems within an integrated approach, rather than in isolation. For which services do we use ecosystems, and how can these be quantified? We hope that answers to questions such as these will give us a deeper understanding of ecosystems and what they signify to humans.
The study provides perspectives on the use of network models to address a variety of applied ecological questions along spatial and temporal dimensions as well as on interactions between abiotic and biotic components of ecosystems. Through collaborative research, network models could provide important levers for sustainable management.
Environmental DNA, hydrochemistry and stable water isotopes as integrative tracers of urban ecohydrology
The authors investigated the variability of planktonic bacteria and benthic diatoms coupled with insights from hydrochemistry and stable water isotopes across four urban streams in Berlin. DNA metabarcoding results shows substantial spatio-temporal variability across urban streams in terms of microbial diversity and richness, with clear links to abiotic factors and nutrient concentrations.
Lake browning counteracts cyanobacteria responses to nutrients: Evidence from phytoplankton dynamics in large enclosure experiments and comprehensive observational data
This study combines experiments in large enclosures with a comprehensive time series and a field survey to assess the joint effects of storm-induced lake browning, nutrient enrichment and deep-mixing on phytoplankton.Browning decreases nutrient enrichment effects on phytoplankton, including shifts in the species composition from cyanobacteria and chlorophytes to mixotrophic cryptophytes.
Flow dynamics in rivers with riffle-pool morphology: a dataset from case studies and field experiments
Riffle-pool sequences provide vital ecological services to aquatic organisms and are considered fundamental habitats in fluvial ecosystems. Little is known about riffle-pool hydrodynamics. The study presents a dataset on turbulent flow structure in riffle-pool sequences of a natural river, the Tagliamento River in Italy.
The authors detected great concentrations of source hotspots on the northern regions associated to lentic ecosystems, main European rivers acting as ecological corridors for all freshwaters, and a mixed distribution of connectivity hotspots in southern and Mediterranean ecoregions.