1 / 1

mining & resource extraction

agriculture. urbanization. industry. downstream impoundment. watershed & riparian devegetation. upstream impoundment. forestry & silviculture. mining & resource extraction. human activity. ↓ oxygen in discharged waters. channel alteration. ↑ chemical contaminants. ↑ oxygen production.

trevor
Télécharger la présentation

mining & resource extraction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. agriculture urbanization industry downstream impoundment watershed & riparian devegetation upstream impoundment forestry & silviculture mining & resource extraction human activity ↓ oxygen in discharged waters channel alteration ↑ chemical contaminants ↑ oxygen production ↑ biochemical oxygen demand ↑ delivery of chemicals, organic material, & nutrients to stream ↑ chemical oxygen demand ↑ aeration ↑ organic loading ↓ aeration ↑ nutrients additional step in causal pathway source impoundment size & type of release modifying factor ↑ temperature ↑ ionic strength LEGEND ↑ sediment ↓ dissolved oxygen (water or sediment) ↑ DO fluctuation (water or sediment ↑ dissolved oxygen (water or sediment) ↑ supersaturation ↑ respiratory stress proximate stressor mode of action ↑ oxidation (↑ Eh) ↑ reduction (↓ Eh) interacting stressor response Simple conceptual diagram for DISSOLVED OXYGEN Developed 7/2007 by Kate Schofield & Suzanne Marcy; modified 6/2010 ↑ mortality ∆ behavior ∆ ecosystem processes ∆ population & community structure

More Related