A CARLSON‐TYPE TROPHIC STATE INDEX FOR NITROGEN IN FLORIDA LAKES<sup>1</sup>

Kratzer, Charles R.; Brezonik, Patrick L.

doi:10.1111/j.1752-1688.1981.tb01282.x

Cited by 326 publications

(199 citation statements)

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“…According to Carlson (1977) and Kratzer and Brezonik (1981), Lake Przykona is low meso-eutrophic and Bogdałów is highly mesotrophic. The average TSI in these lakes was over 40 (Table 3).…”

Section: Discussionmentioning

confidence: 99%

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Understanding Abiotic and Biotic Conditions in Post-Mining Pit Lakes for Efficient Management: A Case Study (Poland)

et al. 2017

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Section: Discussionmentioning

confidence: 99%

“…The trophic state index (TSI) of the studied lakes was calculated from the: SD, Chl a, TP, and TN (Carlson 1977;Kratzer and Brezonik 1981). The rotifer trophic state index (TSI Rot ) was calculated after Ejsmont- Karabin (2012).…”

Section: Methodsmentioning

confidence: 99%

Understanding Abiotic and Biotic Conditions in Post-Mining Pit Lakes for Efficient Management: A Case Study (Poland)

et al. 2017

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“…Distribuição de frequência dos valores da razão N:P em todas as amostras da lagoa Caiubá, durante dezembro de 2009 e novembro de 2010, (n=72) Kratzer & Brezonik (1981) estudando lagos rasos tropicais na Flórida consideraram ambientes com produtividade limitada por nitrogênio, aqueles que apresentam razão N:P menor que 10. Os resultados desta pesquisa indicaram que apenas em seis das amostragens esses valores ultrapassaram tal valor, podendo a lagoa Caiubá ser considerada limitada por nitrogênio.…”

Section: Figura 2 Dendrograma Da Ordenação Sazonal Das Variáveis Da unclassified

Qualidade de água de uma lagoa rasa em meio rural no sul do Brasil

Cunha¹,

Garcia²,

Albertoni³

et al. 2013

Rev. bras. eng. agríc. ambient.

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RESUMONo seu entorno, a lagoa Caiubá apresenta regiões preservadas e áreas com cultura de arroz e de pecuária. Esta pesquisa descreve o padrão de variação sazonal e espacial das variáveis fisico-químicas e biológicas durante os anos de 2009 e 2010, em nove pontos distribuídos espacialmente na lagoa, representando suas partes norte, central e sul. A qualidade da água foi avaliada através da aplicação do índice de estado trófico (IET), do índice de qualidade de água (IQA) e das classes da Resolução CONAMA 357/2005. Foram coletadas amostras de invertebrados bentônicos e determinados os Índices Bióticos (IB) de acordo com os modelos da Environmental Protection Agency (EPA-USA) e a adaptação do Biological Monitoring Working Party (BMWP). Os resultados evidenciaram um sistema com alta turbidez e conteúdo de fósforo, além de baixa razão N:P, e com poucas alterações sazonais e espaciais nas variáveis medidas. Embora os resultados do IQA e CONAMA tenham classificado a lagoa Caiubá como águas de excelente a boa qualidade, os resultados do IET e dos IB foram opostos classificando a lagoa como sistema alterado e poluído. Conclui-se que esses índices devam ser readequados através de avaliações sistemáticas visando refletir as condições de qualidade de ecossistemas aquáticos em meio rural, na região subtropical do Brasil. The results demonstrated a system with high turbidity and phosphorus content, and low N:P ratio, and with little seasonal and spatial changes in the measured variables. Although the results of WQI and the CONAMA have classified the lagoon waters with excellent to good quality, the results of the TSI and the BI were opposites, classifying the ecosystem as amended and polluted system. It is concluded that these indices should be readjusted through systematic evaluations in order to reflect the quality condition of aquatic ecosystems in rural areas in the subtropical region of Brazil.

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“…net. Trophic indices were calculated in accordance with formulas proposed by Carlson (1977), Kratzer and Brezonik (1981) and Dunalska (2011).…”

Section: Methodsmentioning

confidence: 99%

Changes in the trophic status of lakes in the Suwałki Landscape Park (NE Poland)

Górniak

Więcko

Karpowicz

2016

Limnological Review

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Abstract:Summer field research and chemical analyses in 2015 provided the basis for the presentation of the trophic status of waters of 28 lakes of the Suwałki Landscape Park in NE Poland, located in the catchment of the River Neman, in the Natura 2000 area -Ostoja Jeleniewska. Lakes Hańcza and Szurpiły are currently mesotrophic ecosystems. The remaining lakes are moderately eutrophic, while four lakes in the group, in addition to anaerobic hypolimnion, have infertile epilimnion similar to that of mesotrophic lakes. Lake Hańcza shows considerable multiannual dynamics of water fertility, periodically reaching a status approximate to eutrophy. In Lake Szurpiły and the majority of smaller lakes of the Suwałki Landscape Park, reduced precipitation in 2015 resulted in an inconsiderable decrease in trophic status. The lakes are under the strong influence of their catchment area, as confirmed by statistically significant correlations between TSI and the Ohle and Schindler ratios. Lakes Kluczysko and Kopane currently remain the most fertile lakes in the Park. Unless rapidly developing cattle breeding leads to excessive fertilisation of waters in the catchment, the forecasted variability of weather conditions during global climate transformations will lead to fluctuations in the fertility of the majority of the analysed lakes at the threshold of meso-and eutrophy. A hypothesis is also stated regarding the considerable role of groundwater alimentation and short retention time in the maintenance of higher than average resources of silica in limnic waters.

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A CARLSON‐TYPE TROPHIC STATE INDEX FOR NITROGEN IN FLORIDA LAKES¹

Cited by 326 publications

References 1 publication

Understanding Abiotic and Biotic Conditions in Post-Mining Pit Lakes for Efficient Management: A Case Study (Poland)

Understanding Abiotic and Biotic Conditions in Post-Mining Pit Lakes for Efficient Management: A Case Study (Poland)

Qualidade de água de uma lagoa rasa em meio rural no sul do Brasil

Changes in the trophic status of lakes in the Suwałki Landscape Park (NE Poland)

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A CARLSON‐TYPE TROPHIC STATE INDEX FOR NITROGEN IN FLORIDA LAKES1

Cited by 326 publications

References 1 publication

Understanding Abiotic and Biotic Conditions in Post-Mining Pit Lakes for Efficient Management: A Case Study (Poland)

Understanding Abiotic and Biotic Conditions in Post-Mining Pit Lakes for Efficient Management: A Case Study (Poland)

Qualidade de água de uma lagoa rasa em meio rural no sul do Brasil

Changes in the trophic status of lakes in the Suwałki Landscape Park (NE Poland)

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A CARLSON‐TYPE TROPHIC STATE INDEX FOR NITROGEN IN FLORIDA LAKES¹