Comprehensive analysis of chemical and biological problems associated with browning agents used in aquatic studies
| Autor: | Sarahi L. Garcia, Kristin Scharnweber, Sari Peura, Marloes Groeneveld, Stefan Bertilsson, Katrin Attermeyer, Raphael Gollnisch, Charlotte Grasset, Moritz Buck, Karolina Einarsdottir, Karin Rengefors, Christin Manthey, Lars J. Tranvik, Eva S. Lindström, Jeffrey A. Hawkes, Robyn Overgaard, Anna J. Székely, Lucas Bolender, Vicente T. Sedano-Núñez |
|---|---|
| Přispěvatelé: | Peura, Sari, 1 Department of Ecology and Genetics, Limnology Uppsala University Uppsala, Attermeyer, Katrin, Bertilsson, Stefan, Bolender, Lucas, Buck, Moritz, Einarsdóttir, Karólína, Garcia, Sarahi L., Gollnisch, Raphael, 7 Department of Biology Lund University Lund Sweden, Grasset, Charlotte, Groeneveld, Marloes, Hawkes, Jeffrey A., 8 Analytical Chemistry, Department of Chemistry BMC Uppsala University Uppsala Sweden, Lindström, Eva S., Manthey, Christin, Övergaard, Robyn, Rengefors, Karin, Sedano‐Núñez, Vicente T., Tranvik, Lars J., Székely, Anna J. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Gonyostomum semen
chemical and biological problems Ocean Engineering Oceanography Hydrology Water Resources Daphnia Mesocosm Dissolved organic carbon ddc:551.48 Browning ddc:550.724 Leonardite Ecosystem Organic matter Biologiska vetenskaper chemistry.chemical_classification Ekologi biology Ecology Chemistry business.industry Aquatic ecosystem Geovetenskap och miljövetenskap 500 Naturwissenschaften und Mathematik::570 Biowissenschaften Biologie::570 Biowissenschaften Biologie Biological Sciences biology.organism_classification Biotechnology Environmental chemistry Environmental science comprehensive analysis browning agents Earth and Related Environmental Sciences business |
| Popis: | Inland waters receive and process large amounts of colored organic matter from the terrestrial surroundings. These inputs dramatically affect the chemical, physical, and biological properties of water bodies, as well as their roles as global carbon sinks and sources. However, manipulative studies, especially at ecosystem scale, require large amounts of dissolved organic matter with optical and chemical properties resembling indigenous organic matter. Here, we compared the impacts of two leonardite products (HuminFeed and SuperHume) and a freshly derived reverse osmosis concentrate of organic matter in a set of comprehensive mesocosm‐ and laboratory‐scale experiments and analyses. The chemical properties of the reverse osmosis concentrate and the leonardite products were very different, with leonardite products being low and the reverse osmosis concentrate being high in carboxylic functional groups. Light had a strong impact on the properties of leonardite products, including loss of color and increased particle formation. HuminFeed presented a substantial impact on microbial communities under light conditions, where bacterial production was stimulated and community composition modified, while in dark potential inhibition of bacterial processes was detected. While none of the browning agents inhibited the growth of the tested phytoplankton Gonyostomum semen, HuminFeed had detrimental effects on zooplankton abundance and Daphnia reproduction. We conclude that the effects of browning agents extracted from leonardite, particularly HuminFeed, are in sharp contrast to those originating from terrestrially derived dissolved organic matter. Hence, they should be used with great caution in experimental studies on the consequences of terrestrial carbon for aquatic systems. Marie Curie International Outgoing Fellowship Swedish Research Council Formas http://dx.doi.org/10.13039/501100001862 Knut and Alice Wallenberg Foundation http://dx.doi.org/10.13039/501100004063 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|