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We sampled transported organic matter in Big Creek mainstem monthly from December 2010 to March 2011. During each month, transported organic matter was collected during 3 time periods (morning, mid-day, and night) for a 24 h period to encompass diel variability. Each month, fine (<1 mm, ≥ 53 µm) transported organic matter (FTOM) was collected from the thalweg for 1 - 4 h. Fine transported organic matter (FTOM) was collected mechanically by pumping river water through a hose attached to a fencepost. The intake was surrounded by a 1-mm mesh and was positioned in the thalweg at c. 0.6 total depth. The water was then pumped to the shore and into 53-µm mesh net. At the end of each sampling period, FTOM nets were removed and rinsed with filtered river water. FTOM was sub-sampled (20 - 50 mL), filtered onto pre-combusted (400 °C for 30 min) and pre-weighed glass-fiber filters (0.7 mm), and frozen immediately. FTOM samples were analyzed for chl-a concentrations and not for AFDM. FTOM filtered sub-samples were used to quantify chl-a concentrations. Based on standard methods (APHA, 1998, Davis et al. 2013), filters were analyzed for chlorophyll-a (chl-a, measure of algal pigments and index of living primary producers). Filters were extracted in methanol for c. 12 h, analyzed for chl-a with a spectrophotometer and corrected for phaeophytin.
Data and Resources
| Field | Value |
|---|---|
| Modified | 2019-06-11 |
| Release Date | 2019-06-11 |
| Publisher | |
| Identifier | 65d16bd9-b525-4201-8a71-69459f96ed8a |
| NKN Identifier | F748BC2C-20F5-43C7-B181-DBE408E58F8B |
| Temporal Coverage | Wednesday, December 1, 2010 - 00:00 to Thursday, March 31, 2011 - 00:00 |
| Language | English (United States) |
| License | |
| Author | |
| Contact Name | Ryan Blackadar |
| Contact Email | |
| Public Access Level | Public |