Predicting fecal indicator organism contamination in Oregon coastal streams
| Autor: | Eugene Foster, Yangdong Pan, Paul Bryce Pettus |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Health
Toxicology and Mutagenesis STREAMS Forests Toxicology Feces Oregon Rivers Animals Cities Riparian zone Indicator organism Hydrology geography geography.geographical_feature_category Variance (land use) Sampling (statistics) Agriculture General Medicine Models Theoretical Pollution Bacterial Load Random forest Fecal coliform Environmental science Cattle Water quality Water Microbiology |
| Zdroj: | Environmental Pollution. 207:68-78 |
| ISSN: | 0269-7491 |
| Popis: | In this study, we used publicly available GIS layers and statistical tree-based modeling (CART and Random Forest) to predict pathogen indicator counts at a regional scale using 88 spatially explicit landscape predictors and 6657 samples from non-estuarine streams in the Oregon Coast Range. A total of 532 frequently sampled sites were parsed down to 93 pathogen sampling sites to control for spatial and temporal biases. This model's 56.5% explanation of variance, was comparable to other regional models, while still including a large number of variables. Analysis showed the most important predictors on bacteria counts to be: forest and natural riparian zones, cattle related activities, and urban land uses. This research confirmed linkages to anthropogenic activities, with the research prediction mapping showing increased bacteria counts in agricultural and urban land use areas and lower counts with more natural riparian conditions. |
| Databáze: | OpenAIRE |
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