Cyanobacterial Proliferation is a Recent Response to Eutrophication in Many Florida Lakes: A Paleolimnological Assessment

Riedinger-Whitmore, Melanie A.; Whitmore, Thomas J.; Smoak, Joseph M.; Brenner, Mark; Moore, A.M.; Curtis, Jason H.; Schelske, Claire L.

doi:10.1080/07438140509354447

Cited by 43 publications

(25 citation statements)

References 30 publications

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“…Their growth in turbulent, nutrient rich waters is in accordance with reported growth (Sommer, 1991). Increasing chlorophytes over the cynaoprokaryotes in 2007 might be attributed to lower growth rates of cynaoprokaryotes compared to chlorophytes (Riedinger-Whitmore, 2005).…”

Section: Trophic Development and Phytoplankton Responsesupporting

confidence: 75%

A survey study on ashtoum El-Gamil park's water concerning phytoplankton populations

El-Karim

Abdelhamid

Mabrouk

et al. 2013

Egypt. J. of Aquatic Biolo. and Fish.

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Among the 19 water samples collected year round during (2010 -2011) from Ashtoum El-Gamil Park, 12 samples succeeded to cluster above similarity level of 60%. The samples of similarity less than 60% were mainly sampled during summer. Total phytoplankton diversity marginally changed between lake stations. The highest diversity of 3.1 was found at station No. 4 in winter where a minimum diversity of 1.14 was found at station No. 1 in spring. The dominant classes in Lake Manzala (Ashtoum El-Gamil Park) were chlorophytes, diatoms and cyanoprokaryotes. The three groups altogether constitute more than 95% and 85% of the total phytoplankton abundance and total number of taxa, respectively. Based on cell number, the chlorophytes ranked the first position of dominance with relative abundance of 84.23% and they exclusively dominated the phytoplankton communities year round. Regarding the species composition, chlorophytes dominated the phytoplankton species composition with percentage occurrence of 44% to the total number of recorded species. The phytoplankton abundance showed major peaks during spring at different stations except at station No. 2 where the highest abundance of 28716 cells x 10 5 l -1 was found, whereas the minor peaks were irregularly distributed between other seasons with the least abundance of 704 cells x 10 5 l -1 which was detected during winter at station No. 4. Generall, the total number of taxa per site showed no obvious pattern of variation. It is concluded that presence and biodiversity of phytoplankton are affected by locations and seasons, and the pollution is under the critical levels.

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Section: Trophic Development and Phytoplankton Responsesupporting

confidence: 75%

A survey study on ashtoum El-Gamil park's water concerning phytoplankton populations

El-Karim

Abdelhamid

Mabrouk

et al. 2013

Egypt. J. of Aquatic Biolo. and Fish.

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“…3). The increase of Cyanobacteria suggests eutrophication in the middle-or downstream river segments may be more pronounced than upstream since a proliferation of Cyanobacteria is often associated with eutrophication in freshwater, estuarine, and marine ecosystems (Riedinger-Whitmore et al 2005). The field observation also supported this deduction.…”

Section: Discussionmentioning

confidence: 99%

Using high-throughput sequencing to assess the impacts of treated and untreated wastewater discharge on prokaryotic communities in an urban river

Bai

Liang

et al. 2013

Appl Microbiol Biotechnol

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In many megacities wastewater is an important source of surface water, particularly during drought periods. While changes in surface water chemistry associated with effluent inflow have generally been well-studied, few data have been collected on the effects to prokaryotic communities. The objective of this study was to explore the impacts of treated and untreated wastewater discharges on prokaryotic community in an urban river. High-throughput sequencing was conducted for analyzing the prokaryotic community composition and function in river water, treated wastewater and untreated wastewater. Results revealed that the prokaryotic community compositions in the upstream river reach were dominated by treated wastewater discharge. In the middle-and downstream river reaches, untreated effluent volumes are higher, thus affecting the structure of the prokaryotic community, promoting a rise in Cyanobacteria and Thaumarchaeota. Function annotation revealed a number of genes associated with xenobiotic metabolism and human diseases were observed in river and wastewater samples, suggesting wastewater discharge to river may pose a risk to human health. Quantitative realtime PCR results revealed that the treated and untreated wastewater discharges also affected the abundance of ammonia oxidation bacteria (AOB) and ammonia oxidation archaea (AOA) in river.

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“…The cores analyzed were 45 cm (D3) and 50 cm (D1) in length, which included the entire period of recent changes in lake. We used methods that are widely accepted by the paleolimnological community for diagnosing changes in the trophic state of lakes (Douglas and Smol 1999;Riedinger-Whitmore et al 2005;Schelske et al 2006).…”

Section: Methodsmentioning

confidence: 99%

The cultural eutrophication of Lac la Biche, Alberta, Canada: a paleoecological study

Schindler

Wolfe

Vinebrooke

et al. 2008

Can. J. Fish. Aquat. Sci.

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Abstract:A multiproxy paleoecological investigation of Lac la Biche, a large boreal lake in northeastern Alberta, Canada, revealed that the lake was eutrophic before European settlement but has undergone additional cultural eutrophication in the past 30 to 50 years. Annual fluxes to sediments of phosphorus, nitrogen, carbon, and inorganic sediments have increased with time. A declining N-P ratio has increasingly favored nitrogen-fixing cyanobacteria. Increased deposition of microbial pigments and diatom frustules and a recent shift in diatom species also indicate increasing eutrophication. Biogenic silica increased with time, but there is no evidence of a near-surface decline that would indicate silica limitation. Stable isotopes suggest that an increasing proportion of carbon deposited in sediments is of in-lake origin, indicating increased productivity. In the basin nearest the town of Lac La Biche, an increase in d 15 N followed the construction of the sewage treatment plant, but more recently, decreased d 15 N in both basins suggests that nitrogen fixation has become a more important source of nitrogen. Despite documented damage to the fishery of the lake, zooplankton fossils do not show evidence of a strong trophic cascade. The study illustrates the power of a multiproxy approach in obtaining reliable paleolimnological conclusions.Résumé : Une étude paléoécologique avec plusieurs variables de substitution au lac La Biche, un grand lac boréal du nord-est de l'Alberta, Canada, montre que le lac était eutrophe avant l'arrivée des européens, mais qu'il a subi une eutrophisation culturelle supplémentaire au cours des 30 à 50 dernières années. Les apports annuels aux sédiments de phosphore, d'azote, de carbone et de sédiments inorganiques se sont accrus au cours des années. Un rapport N-P en dé-clin a de plus en plus favorisé les cyanobactéries fixatrices d'azote. Les dépôts croissants de pigments microbiens et de frustules de diatomées, de même qu'un changement récent dans les espèces de diatomées, indiquent une intensification de l'eutrophisation. Il y a une augmentation dans le temps de la silice biogène, mais aucune indication d'un déclin près de la surface qui pourrait signaler une limitation de la silice. Les analyses d'isotopes stables laissent croire qu'une proportion croissante du carbone déposé dans les sédiments provient du lac lui-même, ce qui indique une productivité accrue. Dans le bassin versant le plus près de la ville de Lac-La-Biche, une augmentation de d 15 N a suivi la construction d'une usine de traitement des eaux usées; plus récemment, une réduction de d 15 N dans les deux bassins fait penser que la fixation d'azote est devenue une source plus importante d'azote. Malgré les données sur les dommages causés aux pêches dans le lac, les fossiles du zooplancton n'appuient pas l'existence d'une importante cascade trophique. Notre étude est un exemple du potentiel des méthodes à nombreuses variables de substitution pour l'obtention de conclusions paléolimnologiques fiables.[Traduit par la Rédaction]

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Cyanobacterial Proliferation is a Recent Response to Eutrophication in Many Florida Lakes: A Paleolimnological Assessment

Cited by 43 publications

References 30 publications

A survey study on ashtoum El-Gamil park's water concerning phytoplankton populations

A survey study on ashtoum El-Gamil park's water concerning phytoplankton populations

Using high-throughput sequencing to assess the impacts of treated and untreated wastewater discharge on prokaryotic communities in an urban river

The cultural eutrophication of Lac la Biche, Alberta, Canada: a paleoecological study

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