دورية أكاديمية
The effect of single versus dual nutrient decreases on phytoplankton growth rates, community composition, and Microcystin concentration in the western basin of Lake Erie.
| العنوان: | The effect of single versus dual nutrient decreases on phytoplankton growth rates, community composition, and Microcystin concentration in the western basin of Lake Erie. |
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| المؤلفون: | Baer MM; Cooperative Institute for Great Lakes Research, School for Environment and Sustainability, University of Michigan., Godwin CM; Cooperative Institute for Great Lakes Research, School for Environment and Sustainability, University of Michigan. Electronic address: cgodwin@umich.edu., Johengen TH; Cooperative Institute for Great Lakes Research, School for Environment and Sustainability, University of Michigan; Michigan Sea Grant, School for Environment and Sustainability, University of Michigan. |
| المصدر: | Harmful algae [Harmful Algae] 2023 Mar; Vol. 123, pp. 102382. Date of Electronic Publication: 2023 Jan 17. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: Elsevier Country of Publication: Netherlands NLM ID: 101128968 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1878-1470 (Electronic) Linking ISSN: 15689883 NLM ISO Abbreviation: Harmful Algae Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Amsterdam ; New York : Elsevier, c2002- |
| مواضيع طبية MeSH: | Cyanobacteria* , Microcystis*, Phytoplankton ; Lakes/microbiology ; Microcystins |
| مستخلص: | The primary management strategy for minimizing harmful algal blooms (HABs) in Lake Erie has been to reduce springtime loading of phosphorus (P) to the lake. However, some studies have shown that the growth rate and toxin content for the HABs-causing cyanobacterium Microcystis also respond to the availability of dissolved inorganic nitrogen (N). This evidence is based on both observational studies that correlate bloom development with changes in N forms and concentrations in the lake, and experiments in which P and/or N are added at concentrations in excess of those present in the lake. The goal of this study was to determine whether a combined decrease in N and P concentrations from ambient levels in Lake Erie could limit the development of HABs more than a reduction in P concentration only. To directly test the impact of P-only versus dual N and P concentration decreases on phytoplankton in the western basin of Lake Erie, we evaluated changes in growth rate, community composition, and microcystin (MC) concentration through eight bioassay experiments performed from June through October 2018, which encompassed the normal Lake Erie Microcystis-dominated HAB season. Our results showed that during the first five experiments covering June 25 to August 13, the P-only and the dual N and P decrease treatments had similar effects. However, when ambient N became scarce later in the season, the N and P decrease treatments resulted in negative growth rates for cyanobacteria, whereas -P only decreases did not. During low ambient N conditions, dual nutrient decreases lowered the prevalence of cyanobacteria among the total phytoplankton community and decreased microcystin concentrations. The results presented here complement previous experimental work on Lake Erie and suggest that dual nutrient control could be an effective management strategy to decrease microcystin production during the bloom and even possibly diminish or shorten the duration of the bloom based on creating nutrient limiting conditions sooner in the HAB growing season. Competing Interests: Declaration of competing interest The authors declare that they have no competing interests pertaining to this work. (Copyright © 2023 Elsevier B.V. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Erie; Eutrophication; Lake; Microcystis; Nitrogen; Phosphorus |
| المشرفين على المادة: | 0 (Microcystins) |
| تواريخ الأحداث: | Date Created: 20230309 Date Completed: 20230313 Latest Revision: 20230313 |
| رمز التحديث: | 20230313 |
| DOI: | 10.1016/j.hal.2023.102382 |
| PMID: | 36894205 |
| قاعدة البيانات: | MEDLINE |
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