Scheda di dettaglio – i prodotti della ricerca
| Dato | Valore |
|---|---|
| Title | Interspecific interactions drive chitin and cellulose degradation by aquatic microorganisms |
| Abstract | Complex biopolymers (BPs) such as chitin and cellulose provide the majority of organic carbon in aquatic ecosystems, but the mechanisms by which communities of bacteria in natural systems exploit them are unclear. Previous degradation experiments in artificial systems predominantly used microcosms containing a single bacterial species, neglecting effects of interspecific interactions. By constructing simplified aquatic microbial communities, we tested how the addition of other bacterial species, of a nanoflagellate protist capable of consuming bacteria, or of both, affect utilization of BPs. Surprisingly, total abundance of resident bacteria in mixed communities increased upon addition of the protist. Concomitantly, bacteria shifted from free-living to aggregated morphotypes that seemed to promote utilization of BPs. In our model system, these interactions significantly increased productivity in terms of overall bacterial numbers and carbon transfer efficiency. This indicates that interactions on microbial aggregates may be crucial for chitin and cellulose degradation. We therefore suggest that interspecific microbial interactions must be considered when attempting to model the turnover of the vast pool of complex biopolymers in aquatic ecosystems. |
| Source | Aquatic microbial ecology 76 (1), pp. 27–37 |
| Keywords | AggregationEcological interactionsFlagellate grazingMicrobial carbon transferPolymer degradationSystem ecology |
| Journal | Aquatic microbial ecology |
| Editor | Inter-Research., Oldendorf/Luhe, Germania |
| Year | 2015 |
| Type | Articolo in rivista |
| DOI | 10.3354/ame01765 |
| Authors | Corno G.; Salka I.; Pohlmann K.; Hall A.R.; Grossart H.-P. |
| Text | 367155 2015 10.3354/ame01765 Scopus 2 s2.0 84940378912 ISI Web of Science WOS 000362667300003 Aggregation Ecological interactions Flagellate grazing Microbial carbon transfer Polymer degradation System ecology Interspecific interactions drive chitin and cellulose degradation by aquatic microorganisms Corno G.; Salka I.; Pohlmann K.; Hall A.R.; Grossart H. P. CNR Institute of Ecosystem Study, Largo Tonolli 50, Verbania, 28922, Italy; Leibniz Institute of Freshwater Ecology and Inland Fisheries IGB , Alte Fischerhuette 2, Stechlin, 16775, Germany; Instituteof Integrative Biology, ETH Zurich, Zurich, 8092, Switzerland; Instituteof Biochemistry and Biology, Potsdam University, Am neuen Palais 10, Potsdam, 14469, Germany Complex biopolymers BPs such as chitin and cellulose provide the majority of organic carbon in aquatic ecosystems, but the mechanisms by which communities of bacteria in natural systems exploit them are unclear. Previous degradation experiments in artificial systems predominantly used microcosms containing a single bacterial species, neglecting effects of interspecific interactions. By constructing simplified aquatic microbial communities, we tested how the addition of other bacterial species, of a nanoflagellate protist capable of consuming bacteria, or of both, affect utilization of BPs. Surprisingly, total abundance of resident bacteria in mixed communities increased upon addition of the protist. Concomitantly, bacteria shifted from free living to aggregated morphotypes that seemed to promote utilization of BPs. In our model system, these interactions significantly increased productivity in terms of overall bacterial numbers and carbon transfer efficiency. This indicates that interactions on microbial aggregates may be crucial for chitin and cellulose degradation. We therefore suggest that interspecific microbial interactions must be considered when attempting to model the turnover of the vast pool of complex biopolymers in aquatic ecosystems. 76 Published version http //www.scopus.com/inward/record.url eid=2 s2.0 84940378912 partnerID=q2rCbXpz Articolo 2015_Aquat_microb_ecol_76_27_37.pdf Articolo in rivista Inter Research. 0948 3055 Aquatic microbial ecology Aquatic microbial ecology Aquat. microb. ecol. Aquatic microbial ecology. AME. Aquatic microbial ecology Aquatic microbial ecology Print AME Oldenburg gianluca.corno CORNO GIANLUCA |