Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon
A number of environmental factors have been shown to influence the dynamics of Hg in aquatic ecosystems. Here we investigate the influence of fish size, pH, dissolved organic carbon (DOC), and the availability of potential methylation sites (floodplain forests and hydromorphic soils) on the concentr...
| Autor principal: | Belger, Lauren |
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| Outros Autores: | Forsberg, Bruce Rider |
| Grau: | Artigo |
| Idioma: | English |
| Publicado em: |
Science of the Total Environment
2020
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| Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/18730 |
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oai:repositorio:1-18730 |
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oai:repositorio:1-18730 Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon Belger, Lauren Forsberg, Bruce Rider Biodiversity Concentration (process) Ecosystems Environmental Impact Ph Effects Soils Amazon Bioaccumulation Dissolved Organic Carbon (doc) Fish Methylation River Pollution Dissolved Organic Matter Mercury Organic Carbon Aquatic Ecosystem Bioaccumulation Fish Mercury (element) Predator Animals Experiment Brasil Carnivory Chemical Analysis Controlled Study Environmental Factor Fish Flooding Floodplain Forest Geography Methylation Nonhuman Ph Priority Journal River Basin Soil Telecommunication Water Sampling Animal Brasil Environmental Monitoring Fishes Food Chain Hydrogen-ion Concentration Mercury Muscle, Skeletal Rivers Soil Pollutants Water Pollutants, Chemical Amazonas Brasil Rio Negro [south America] South America Cichla Hoplias Malabaricus Pisces A number of environmental factors have been shown to influence the dynamics of Hg in aquatic ecosystems. Here we investigate the influence of fish size, pH, dissolved organic carbon (DOC), and the availability of potential methylation sites (floodplain forests and hydromorphic soils) on the concentration of total Hg in two carnivorous fishes: Cichla spp. and Hoplias malabaricus in the Negro River, Brazil. Fish and water samples for chemical analysis were collected from 33 sites in the Negro basin. The percentage of alluvial floodplains and hydromorphic soils (potential methylation sites) in the drainage basin upstream from each sampling point was estimated from radar imagery and existing soil maps with GIS. The average of Hg concentrations were 0.337 ppm (SD = 0.244) in Cichla spp. and 0.350 ppm (SD = 0.250) in H. malabaricus. Although the study area was geographically isolated from most major anthropogenic Hg sources, over 18% of Cichla spp. and 29% of H. malabaricus had Hg concentrations above 0.5 ppm, indicating naturally high background levels of Hg. Hg concentrations increased with size in both Cichla spp. (r2 = 0.664, p = 0.000) and H. malabaricus (r2 = 0.299, p = 0.000). Hg concentrations in H. malabaricus also increased with percent floodable area (p = 0.006), pH (p = 0.000) and DOC (0,063). In Cichla spp, Hg increased only in relation to percent floodable area (p = 0.000). Hydromorphic soils did not influence fish Hg. © 2006 Elsevier B.V. All rights reserved. 2020-06-15T22:02:46Z 2020-06-15T22:02:46Z 2006 Artigo https://repositorio.inpa.gov.br/handle/1/18730 10.1016/j.scitotenv.2006.03.033 en Volume 367, Número 1, Pags. 451-459 Restrito Science of the Total Environment |
| institution |
Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional |
| collection |
INPA-RI |
| language |
English |
| topic |
Biodiversity Concentration (process) Ecosystems Environmental Impact Ph Effects Soils Amazon Bioaccumulation Dissolved Organic Carbon (doc) Fish Methylation River Pollution Dissolved Organic Matter Mercury Organic Carbon Aquatic Ecosystem Bioaccumulation Fish Mercury (element) Predator Animals Experiment Brasil Carnivory Chemical Analysis Controlled Study Environmental Factor Fish Flooding Floodplain Forest Geography Methylation Nonhuman Ph Priority Journal River Basin Soil Telecommunication Water Sampling Animal Brasil Environmental Monitoring Fishes Food Chain Hydrogen-ion Concentration Mercury Muscle, Skeletal Rivers Soil Pollutants Water Pollutants, Chemical Amazonas Brasil Rio Negro [south America] South America Cichla Hoplias Malabaricus Pisces |
| spellingShingle |
Biodiversity Concentration (process) Ecosystems Environmental Impact Ph Effects Soils Amazon Bioaccumulation Dissolved Organic Carbon (doc) Fish Methylation River Pollution Dissolved Organic Matter Mercury Organic Carbon Aquatic Ecosystem Bioaccumulation Fish Mercury (element) Predator Animals Experiment Brasil Carnivory Chemical Analysis Controlled Study Environmental Factor Fish Flooding Floodplain Forest Geography Methylation Nonhuman Ph Priority Journal River Basin Soil Telecommunication Water Sampling Animal Brasil Environmental Monitoring Fishes Food Chain Hydrogen-ion Concentration Mercury Muscle, Skeletal Rivers Soil Pollutants Water Pollutants, Chemical Amazonas Brasil Rio Negro [south America] South America Cichla Hoplias Malabaricus Pisces Belger, Lauren Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon |
| topic_facet |
Biodiversity Concentration (process) Ecosystems Environmental Impact Ph Effects Soils Amazon Bioaccumulation Dissolved Organic Carbon (doc) Fish Methylation River Pollution Dissolved Organic Matter Mercury Organic Carbon Aquatic Ecosystem Bioaccumulation Fish Mercury (element) Predator Animals Experiment Brasil Carnivory Chemical Analysis Controlled Study Environmental Factor Fish Flooding Floodplain Forest Geography Methylation Nonhuman Ph Priority Journal River Basin Soil Telecommunication Water Sampling Animal Brasil Environmental Monitoring Fishes Food Chain Hydrogen-ion Concentration Mercury Muscle, Skeletal Rivers Soil Pollutants Water Pollutants, Chemical Amazonas Brasil Rio Negro [south America] South America Cichla Hoplias Malabaricus Pisces |
| description |
A number of environmental factors have been shown to influence the dynamics of Hg in aquatic ecosystems. Here we investigate the influence of fish size, pH, dissolved organic carbon (DOC), and the availability of potential methylation sites (floodplain forests and hydromorphic soils) on the concentration of total Hg in two carnivorous fishes: Cichla spp. and Hoplias malabaricus in the Negro River, Brazil. Fish and water samples for chemical analysis were collected from 33 sites in the Negro basin. The percentage of alluvial floodplains and hydromorphic soils (potential methylation sites) in the drainage basin upstream from each sampling point was estimated from radar imagery and existing soil maps with GIS. The average of Hg concentrations were 0.337 ppm (SD = 0.244) in Cichla spp. and 0.350 ppm (SD = 0.250) in H. malabaricus. Although the study area was geographically isolated from most major anthropogenic Hg sources, over 18% of Cichla spp. and 29% of H. malabaricus had Hg concentrations above 0.5 ppm, indicating naturally high background levels of Hg. Hg concentrations increased with size in both Cichla spp. (r2 = 0.664, p = 0.000) and H. malabaricus (r2 = 0.299, p = 0.000). Hg concentrations in H. malabaricus also increased with percent floodable area (p = 0.006), pH (p = 0.000) and DOC (0,063). In Cichla spp, Hg increased only in relation to percent floodable area (p = 0.000). Hydromorphic soils did not influence fish Hg. © 2006 Elsevier B.V. All rights reserved. |
| format |
Artigo |
| author |
Belger, Lauren |
| author2 |
Forsberg, Bruce Rider |
| author2Str |
Forsberg, Bruce Rider |
| title |
Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon |
| title_short |
Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon |
| title_full |
Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon |
| title_fullStr |
Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon |
| title_full_unstemmed |
Factors controlling Hg levels in two predatory fish species in the Negro river basin, Brazilian Amazon |
| title_sort |
factors controlling hg levels in two predatory fish species in the negro river basin, brazilian amazon |
| publisher |
Science of the Total Environment |
| publishDate |
2020 |
| url |
https://repositorio.inpa.gov.br/handle/1/18730 |
| _version_ |
1787142112649674752 |
| score |
11.755432 |