Estudos limnológicos e ecotoxicológicos com amostras de água e sedimento do ribeirão Limeira - Piquete/Lorena-SP
Bibliographic record
Abstract
The Limeira stream is born in Piquete -SP and flows into the Paraiba do Sul river, in Lorena -SP.In this basin there are military and abrasives industries, eucalyptus plantations and pasture areas.To evaluate potential impacts of the use and occupation of the area, this study assessed the ecotoxicological and limnological conditions of the stream between September 2007 and July 2008.Seven sampling points were estabilished along the river from the source to the mouth.The acute and chronic toxicity were evaluated both in the water and sediment, using the cladocerans Daphnia similis and Ceriodaphnia silvestrii, algae Pseudokirchneriella subcapitata for the water and C. silvestrii, D. similis and chironomids Chironomus xanthus for the sediment.The limnological parameters analyzed in water were: turbidity, conductivity, dissolved oxygen, pH, COD, BOD, nitrate, nitrite, total phosphorus, total dissolved solids, hardness, metals (Ag, Cd, Cr, Cu, Fe, Mn, Mg, Ni , Pb and Zn) and fecal coliform; and the physical-chemical parameters of sediment were: total phosphorus, organic matter, granulometry, metals and bioavailable fractions.The in situ bioassays were conducted using PVC chambers at previously selected points, based on the results of ecotoxicity.The results showed that seasonality influenced both the dynamics of the environment and the analyzed variables.The spatial variation indicated influence of human activities along the stream.In some months, the analyzed parameters of water were outside the parameters established by CONAMA Resolution 357/05 for Class I and II.Diffuse pollution sources made it difficult to identify the potential toxicity-causing substances.In some points along the river, the values of metals in sediment were outside the limits recommended by the Canadian Council of Ministers of the Environment.According to the index for the maintenance of aquatic life (VAT), the river showed regular water quality due to the results of acute and chronic toxicity observed in some points.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".