Untitled

Rivas, Zulay; Medina, Hilda Ledo de; Gutiérrez, Janio; Gutiérrer, Elizabeth

doi:10.1023/a:1005189710803

Cited by 20 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These concentrations can be compared with those found by Owens and Walling (2002) in the <63 μm fractions which oscillate between 500 and 1,500 mg kg −1 for bed sediments in the Swale River. In the Catatumbo River (Venezuela), bulk bed river sediments had P concentrations ranging between 64 and 1,305 mg kg −1 (Rivas et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Total Phosphorous Distribution and Bioavailability in the Bed Sediments of an Atlantic Basin (Galicia, NW Spain): Spatial Distribution and Vertical Profiles

Rey

Iglesias

Dı́az-Fierros

et al. 2008

Water Air Soil Pollut

View full text Add to dashboard Cite

The Anllóns basin (NW Spain) has been included in the Natura 2000 Network and declared as Site of Community Importance. The main contamination problems of the basin come from a former gold mine and from agricultural activities, which influence the quality of the sediment-water system. Phosphorus (P) enrichment in the bed sediments was evaluated by analyzing P in the pore waters, in the surface bed sediments, and in the vertical sediment profiles, including both total and bioavailable forms. Two granulometric fractions (<2 mm and <63 μm) were evaluated. Pore waters, bed sediments, and vertical profiles showed high percentages of the bioavailable P fraction with respect to the total P content, which evidences the potential risk of pollution which suppose the bed sediments of the Anllóns River. The vertical profiles showed P enrichment in the superficial layers, which could be the consequence of the increased use of fertilizers in the last decades. With regards to the granulometric distributions, the <63 μm showed, in general, higher P concentrations than the <2 mm fraction. However, at the sampling points most heavily contaminated, the concentration of both fractions becomes similar, thus indicating that, at these sites, the coatings formed over sands can retain important P concentrations in the bed sediments.

show abstract

Section: Discussionmentioning

confidence: 99%

Total Phosphorous Distribution and Bioavailability in the Bed Sediments of an Atlantic Basin (Galicia, NW Spain): Spatial Distribution and Vertical Profiles

Rey

Iglesias

Dı́az-Fierros

et al. 2008

Water Air Soil Pollut

View full text Add to dashboard Cite

show abstract

“…Studies show a direct relationship between chlorophyll and phosphorous (Smith 1982), and Quiros (2002) states that the algal biomass reaches its peak with overload of total phosphorous. Furthermore, nutrients overload lead to these environments by runoff and point source of pollution (Rivas et al 2000), reducing the water column and increasing the autochthonous production (Rast & Thornton 1996). Thus, littoral regions in lakes tend to have higher productivity and fauna diversity than limnetic and profundal regions (Tundisi & Matsumura-Tundisi 2008).…”

Section: Introductionmentioning

confidence: 99%

The invertebrate's community in adjacent Alto Iguaçu's anthropic lakes of different environmental factors

et al. 2013

View full text Add to dashboard Cite

The invertebrate's community in adjacent Alto Iguaçu's anthropic lakes of different environmental factors. Biota Neotrop. 13(1): http://www.biotaneotropica.org.br/v12n4/en/abstract?article+bn00813012013Abstract: Environmental differences occur between lentic and lotic communities' establishment, especially because of water time residence. Here we used a combination of field measurements and statistical analysis to evaluate the influent factors on the aquatic macroinvertebrates' composition and structure in 15 anthropogenic lakes from Alto Iguaçu's region. Macroinvertebrates were sampled from the marginal vegetation (with or without macrophytes) and sediment. Chemical parameters ranged among the anthropogenic lakes, mainly those which are connected to the Iguaçu River, beyond the presence or absence of macrophytes, interfering on the community's structure. Lake's morphometric data were measured in each lake and its relation to community was tested. The community structure was not related to the margin development index (Ds), macrophytes and altitude. Higher equitability was associated to the macrophytes presence in more than 30% of water surface and also where the riparian vegetation was more complex. Chironomids and oligochaetes densities were associated to lakes with the water surface completely covered by macrophytes and complex riparian vegetation. We observed a close association between productivity (phosphorous and nitrogen) and the community equitability (R = 0.3; p < 0.05) and Oligochaeta dominance (R = 0.32; p < 0.05), and not to Ostracoda's (R = 0.33; p > 0.05) and Chironomidae's (R = 0.34; p > 0.05) dominances, although we had not weighty difference among analyzed biological indexes. Resumo: Diferenças ambientais ocorrem entre o estabelecimento de comunidades de ambientes lênticos e lóticos, especialmente por causa do tempo de residência da água. Foi usada uma combinação de métricas de campo e análise estatística para avaliar os fatores influentes sobre a composição e estrutura de macroinvertebrados aquáticos em 15 lagos antropogênicos da região do Alto Iguaçu. Os macroinvertebrados foram amostrados da vegetação marginal (com ou sem macrófitas) e sedimento. Parâmetros químicos variaram entre os lagos antrópicos, principalmente aqueles conectados ao Rio Iguaçu, além da presença ou ausência das macrófitas, interferindo na estrutura da comunidade. Dados de morfometria de lagos foram mensurados e sua relação com a comunidade foi testada. A estrutura da comunidade não foi relacionada ao índice de desenvolvimento da margem (Ds), macrófitas e altitude. Maior equitabilidade foi associada à presença de macrófitas em mais de 30% da superfície da água e também onde a vegetação ripária foi mais complexa. Densidades de quironomídeos e oligoquetas foram associadas a lagos com a superfície completamente coberta por macrófitas e complexa vegetação ripária. Foi observada associação entre a produtividade (fósforo e nitrogênio) e a equitabilidade da comunidade (R = 0.3; p < 0.05) e dominância de Oligochaeta (R = 0.32; p ...

show abstract

Effect and Ecological Assessment of Microbial Remediation

Zhang

Yang

2016

The Handbook of Environmental Chemistry

View full text Add to dashboard Cite

Untitled

Cited by 20 publications

References 4 publications

Total Phosphorous Distribution and Bioavailability in the Bed Sediments of an Atlantic Basin (Galicia, NW Spain): Spatial Distribution and Vertical Profiles

Total Phosphorous Distribution and Bioavailability in the Bed Sediments of an Atlantic Basin (Galicia, NW Spain): Spatial Distribution and Vertical Profiles

The invertebrate's community in adjacent Alto Iguaçu's anthropic lakes of different environmental factors

Effect and Ecological Assessment of Microbial Remediation

Contact Info

Product

Resources

About