Phytoplankton communities response to a mine effluent rich in copper

Oliveira, R.

doi:10.1007/bf00008941

Cited by 15 publications

(5 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The present study found this cyanobacterium to be sensitive to As but tolerant to Cr as well as Al. The tolerance of Scenedesmus quadricauda to all the test metals in the present case is in agreement with the report on its greater copper tolerance (Oliveira, 1985). However, the other species Scendesmus bijugatus showed sensitivity to test metals.…”

Section: Discussionsupporting

confidence: 93%

<em>In situ</em> effects of arsenic, aluminium and chromium stresses on algal periphyton of the river Ganga at Varanasi, India

Yadav

Pandey

2023

J Limnol

View full text Add to dashboard Cite

In situ effect of metal stress on periphytic algal communities of a river was studied using chemical diffusing substrates. The metal stress caused the inhibition of periphytic biomass in a concentration-dependent manner. The study indicated differential response of various periphytic groups to different metal treatments. Diatoms exhibited tolerance against arsenic (As) and aluminium (Al) treatment but displayed sensitivity against chromium (Cr) treatment. An increased abundance of cyanobacteria was noteworthy in Cr enrichment, but Al and As were hazardous to these organisms. The relative abundance of green algae also increased in all three test metals. The metal stress lowered the species richness and diversity of periphytic algae, apparently due to the elimination of some of the sensitive species followed by an increased abundance of tolerant forms. Periphytic taxa tolerant to one metal were not necessarily tolerant to other metals or metalloids, and vice versa. The metal-induced changes in algal community composition will lead to severe ecological consequences by affecting biological diversity and in turn productivity of aquatic systems. Since algae occupy the aquatic food web base, any harmful effect on these organisms would have repercussions at higher trophic levels. Thus, it seems urgent to incorporate biomonitoring practices and chemical analysis to monitor the river Ganga's ecological health.

show abstract

Section: Discussionsupporting

confidence: 93%

<em>In situ</em> effects of arsenic, aluminium and chromium stresses on algal periphyton of the river Ganga at Varanasi, India

Yadav

Pandey

2023

J Limnol

View full text Add to dashboard Cite

show abstract

“…The first references to the presence of the genera Synura and Mallomonas in Portuguese waters date from the late 1950s and early 1960s, respectively (Nauwerck 1959(Nauwerck , 1962. In these and later works (e.g., Rino 1969;Moita 1976;Oliveira 1985;Coutinho 1990) several species are cited, but their identifications were based exclusively on observations with the light microscope, which renders most of them doubtful. In a recent survey of 17 sites in central Portugal Santos & Leedale (1993) found 11 species of Mallomonas and 5 of Synura using TEM.…”

Section: Introductionmentioning

confidence: 99%

Notes on the ecology of Synurophycean algae found in Portugal

Craveiro¹

1995

Nordic Journal of Botany

View full text Add to dashboard Cite

A survey of species of Synurophyceae in samples collected over the last ten years from freshwater bodies of central Portugal resulted in the identification of 33 taxa of Mallomonas and 6 of Synura, of which a total of 24 taxa are reported for the first time from Portugal by means of electron microscopy. A short ecological description is provided for the sampling sites and notes are added about the ecological preferences demonstrated by the most common taxa. Use is made of the saprobity system to designate different types of eutrophic waters. SEM micrographs are provided for all the taxa reported; SEM study was conducted in most cases on uncovered material at an acceleration tension of 2 kV, and higher tensions were used to view the internal structure of the scales and help solving some identification problems.

show abstract

“…For the spanish reservoirs he found (1976) most of the AN values ranging from 0 .5 to 5 . A shift in the dominant phytoplankton species from the upper reservoir (Crucigenia tetrapedia, Quadrigula closterioide, Tabellaria flocculosa and Melosira distans) to the mine and down mine reservoir (Cosmarium tinctum), as well as a strong reduction in density and species number was observed (Oliveira, 1985) .…”

Section: Comparisons Of Primary Productivity (Pp) Chlorophyll a (Chlmentioning

confidence: 99%

“…The downstream reservoirs, Venda Nova and Salamonde are subjected to copper contamination from wastes of a copper pyrite and tungsten mine. Some studies, on copper distribution (Vale, 1982), phytoplankton (Oliveira, 1985) and zooplankton (Monteiro, 1982) were undertaken .…”

Section: Introductionmentioning

confidence: 99%

Primary production and pigments in three low alkalinity connected reservoirs receiving mine wastes

Cabeçadas

Brogueira

1987

Hydrobiologia

View full text Add to dashboard Cite

A comparative study of primary production and pigments, conducted from April 1981 to April 1982, in a chain of three low alkalinity reservoirs situated in north of Portugal revealed significant lower values (159 mg C m-2 d -1 and 19.8 mg m -2 as chlorophyll a, growing season means) in the reservoir receiving wastes rich in copper from a tungsten copper pyrite mine. This contrasts specially with the situation observed in the upstream reservoir which presents the highest values (409 mg C m -2 d -' and 55 .2 mg m -2) recorded in the system . Eventual effects of the mine discharge on phytoplankton biomass and photosynthesis such as high turbidity and copper toxicity are discussed . Results point out to be the presence of copper responsible for the alterations in the phytoplankton community . The system exhibits similar photosynthetic capacity which indicates an adaption to the relatively high copper concentrations in water and sediments .Experiments carried out in the largest unpolluted reservoir show that the loss of carbon through respiration is of major importance and indicate the phosphorus to be one of the factors limiting phytoplankton productivity. 173

show abstract

Phytoplankton communities response to a mine effluent rich in copper

Cited by 15 publications

References 14 publications

<em>In situ</em> effects of arsenic, aluminium and chromium stresses on algal periphyton of the river Ganga at Varanasi, India

<em>In situ</em> effects of arsenic, aluminium and chromium stresses on algal periphyton of the river Ganga at Varanasi, India

Notes on the ecology of Synurophycean algae found in Portugal

Primary production and pigments in three low alkalinity connected reservoirs receiving mine wastes

Contact Info

Product

Resources

About