The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake
Seasonal flooding changes chemical and morphometric characteristics of the tropical floodplain lakes, affecting stratification which can influence mercury dynamics. We investigate the influence of flooding on the mercury dynamics in an Amazon floodplain lake. Three points on the lake, the Solimões R...
| Autor principal: | Brito, Brendson C. |
|---|---|
| Outros Autores: | Forsberg, Bruce Rider, Kasper, Daniele, Amaral, João Henrique Fernandes, Vasconcelos, Moema R.R. de, Sousa, Otávio P. de, Cunha, Fábio Andrew Gomes, Bastos, Wanderley Rodrigues |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Hydrobiologia
2020
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| Assuntos: | |
| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/17134 |
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oai:repositorio:1-17134 |
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dspace |
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oai:repositorio:1-17134 The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake Brito, Brendson C. Forsberg, Bruce Rider Kasper, Daniele Amaral, João Henrique Fernandes Vasconcelos, Moema R.R. de Sousa, Otávio P. de Cunha, Fábio Andrew Gomes Bastos, Wanderley Rodrigues Concentration (composition) Dilution Flooding Floodplain Hydrological Response Mercury (element) Methyl Mercury Morphometry Phytoplankton Stratification Amazonas Brasil Solimoes River Seasonal flooding changes chemical and morphometric characteristics of the tropical floodplain lakes, affecting stratification which can influence mercury dynamics. We investigate the influence of flooding on the mercury dynamics in an Amazon floodplain lake. Three points on the lake, the Solimões River, and the connecting channel to the river were sampled along the annual flood pulse. During high-water, the lake was deep (12.7 m, on average) and the area farthest from the river was stratified with low oxygen and high methylmercury concentrations ([MeHg]) at depths below 7 m (0.37 ng l−1, on average). The two sites closest to the river were destratified and the [MeHg] was lower (0.077 ng l−1, on average along all depths). At low-water, the lake was shallower (3 m, on average) and destratified, with higher oxygen concentrations, and no difference in [MeHg] along the water column at all lake sites. Independent of season, the [MeHg] in the connecting channel was higher than those in the river. The [MeHg] in phytoplankton varied in response to changes in biomass, showing a biodilution effect. Variations in lake morphometry controlled the stratification and [MeHg] in the lake during the high-water. Floodplain lakes export hypolimnetic MeHg to their associated rivers during high-water. © 2016, Springer International Publishing Switzerland. 2020-06-15T21:39:13Z 2020-06-15T21:39:13Z 2017 Artigo https://repositorio.inpa.gov.br/handle/1/17134 10.1007/s10750-016-3017-y en Volume 790, Número 1, Pags. 35-48 Restrito Hydrobiologia |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Concentration (composition) Dilution Flooding Floodplain Hydrological Response Mercury (element) Methyl Mercury Morphometry Phytoplankton Stratification Amazonas Brasil Solimoes River |
| spellingShingle |
Concentration (composition) Dilution Flooding Floodplain Hydrological Response Mercury (element) Methyl Mercury Morphometry Phytoplankton Stratification Amazonas Brasil Solimoes River Brito, Brendson C. The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake |
| topic_facet |
Concentration (composition) Dilution Flooding Floodplain Hydrological Response Mercury (element) Methyl Mercury Morphometry Phytoplankton Stratification Amazonas Brasil Solimoes River |
| description |
Seasonal flooding changes chemical and morphometric characteristics of the tropical floodplain lakes, affecting stratification which can influence mercury dynamics. We investigate the influence of flooding on the mercury dynamics in an Amazon floodplain lake. Three points on the lake, the Solimões River, and the connecting channel to the river were sampled along the annual flood pulse. During high-water, the lake was deep (12.7 m, on average) and the area farthest from the river was stratified with low oxygen and high methylmercury concentrations ([MeHg]) at depths below 7 m (0.37 ng l−1, on average). The two sites closest to the river were destratified and the [MeHg] was lower (0.077 ng l−1, on average along all depths). At low-water, the lake was shallower (3 m, on average) and destratified, with higher oxygen concentrations, and no difference in [MeHg] along the water column at all lake sites. Independent of season, the [MeHg] in the connecting channel was higher than those in the river. The [MeHg] in phytoplankton varied in response to changes in biomass, showing a biodilution effect. Variations in lake morphometry controlled the stratification and [MeHg] in the lake during the high-water. Floodplain lakes export hypolimnetic MeHg to their associated rivers during high-water. © 2016, Springer International Publishing Switzerland. |
| format |
Artigo |
| author |
Brito, Brendson C. |
| author2 |
Forsberg, Bruce Rider Kasper, Daniele Amaral, João Henrique Fernandes Vasconcelos, Moema R.R. de Sousa, Otávio P. de Cunha, Fábio Andrew Gomes Bastos, Wanderley Rodrigues |
| author2Str |
Forsberg, Bruce Rider Kasper, Daniele Amaral, João Henrique Fernandes Vasconcelos, Moema R.R. de Sousa, Otávio P. de Cunha, Fábio Andrew Gomes Bastos, Wanderley Rodrigues |
| title |
The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake |
| title_short |
The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake |
| title_full |
The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake |
| title_fullStr |
The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake |
| title_full_unstemmed |
The influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an Amazon floodplain lake |
| title_sort |
influence of inundation and lake morphometry on the dynamics of mercury in the water and plankton in an amazon floodplain lake |
| publisher |
Hydrobiologia |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/17134 |
| _version_ |
1787145270389112832 |
| score |
11.755432 |