The role of nutrients in promoting a bloom of the nuisance raphidophyte species Gonyostomum semen in a subtropical reservoir
| العنوان: | The role of nutrients in promoting a bloom of the nuisance raphidophyte species Gonyostomum semen in a subtropical reservoir |
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| المؤلفون: | Amanda D. Neilen, Michele A. Burford, Baden Gibbes, Stephen John Faggotter, Michael Bartkow |
| المصدر: | Aquatic Microbial Ecology. 86:47-62 |
| بيانات النشر: | Inter-Research Science Center, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | 0106 biological sciences, Gonyostomum semen, biology, 010604 marine biology & hydrobiology, Subtropics, Aquatic Science, Raphidophyte, biology.organism_classification, 010603 evolutionary biology, 01 natural sciences, chemistry.chemical_compound, Nutrient, Nitrate, chemistry, Botany, Bloom, Nuisance, Ecology, Evolution, Behavior and Systematics |
| الوصف: | The nuisance raphidophyte Gonyostomum semen (Ehrenberg) Diesing blooms in lakes and is known to produce a mucilage which can cause human skin irritation. Parameters such as water temperature, iron and high dissolved organic matter loads are shown to be important drivers in temperate regions. However, the causes of blooms in warmer latitudes are less well understood. Over a 6 mo study period, we used field monitoring and a nutrient addition experiment within a water reservoir to examine the role of nutrients in promoting G. semen growth. Early in the study, an inflow event delivered nutrients which increased dissolved inorganic nitrogen (DIN) concentrations 2-fold and filterable reactive phosphorus (FRP = phosphate) 4-fold. This event shifted the phytoplankton community from a mixed community to one dominated by G. semen. Two months after the inflow event, the effect of nutrients in promoting G. semen was confirmed with a nutrient addition experiment. Total biovolumes of this species across the study were strongly predicted by FRP and nitrate + nitrite concentrations. G. semen biovolumes also decreased as ratios of total nitrogen (TN):total phosphorus (TP) and DIN:FRP increased, highlighting the importance of P inputs. The stable isotope tracer 15N-nitrate was also used to trace N through the G. semen-dominated phytoplankton community. The tracer rapidly cycled through the G. semen-dominated phytoplankton community in 1-2 d, settled and remineralized, providing an ongoing source of DIN for maintaining blooms. Overall, the results highlight the importance of FRP, and to a lesser extent nitrate, in promoting blooms of this nuisance species. |
| تدمد: | 1616-1564 0948-3055 |
| DOI: | 10.3354/ame01953 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::86f6379c96ecede31dc3058faa7fcadb https://doi.org/10.3354/ame01953 |
| Rights: | CLOSED |
| رقم الانضمام: | edsair.doi...........86f6379c96ecede31dc3058faa7fcadb |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16161564 09483055 |
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| DOI: | 10.3354/ame01953 |