All Images
News Release 15-018
Nutrient pollution from nitrogen and phosphorus reduces streams' ability to support aquatic life
Residence time of leaves and twigs, important to stream-dwelling species, can be halved
This material is available primarily for archival purposes. Telephone numbers or other contact information may be out of date; please see current contact information at media contacts.
![Leaves and wood in a stream](/news/mmg/media/images/Rosemond_ecosystems_1_f.jpg)
Leaves and wood provide essential "ecosystem services" to streams; nutrient pollution affects them.
Credit: Phillip Bumpers
Download the high-resolution JPG version of the image. (151.2 KB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.
![sattelite image showing dots marking where experiments took place](/news/mmg/media/images/Rosemond_ecosystems_6_f.jpg)
Experiments were in streams (shown by dots) characteristic of human-modified landscapes.
Credit: USGS/USDA/World Imagery Source
Download the high-resolution JPG version of the image. (1.1 MB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.
![table with equipment for testingsamples from streams](/news/mmg/media/images/Rosemond_ecosystems_2_f.jpg)
Scientists tested the effects of nutrient pollution by adding nutrients to certain streams.
Credit: Jonathon Benstead
Download the high-resolution JPG version of the image. (333.2 KB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.
![side by side a stream in winter and in summer](/news/mmg/media/images/Rosemond_ecosytems_3_f.jpg)
Researchers maintained additions of nitrogen and phosphorus to streams on a year-round basis.
Credit: Phillip Bumpers
Download the high-resolution JPG version of the image. (2.1 MB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.
![Nutrient-stimulated feeding by stream insects also reduces retention of carbon in stream reaches.](/news/mmg/media/images/rosemond_ecosystems_5_cc6d1a9b-8c10-4b7f-823f-9cf22836c862.jpg)
Nutrient-stimulated feeding by stream insects also reduces retention of carbon in stream reaches.
Credit: John Davis
Download the high-resolution JPG version of the image. (101.3 KB)
Use your mouse to right-click (Mac users may need to Ctrl-click) the link above and choose the option that will save the file or target to your computer.