Changes in riparian area structure, channel hydraulics, and sediment yield following loss of beaver dams
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
Channel structure, riparian zone structure, and sediment transport capacity were investigated for Sandown Creek, a stream in the East Kootenay region of British Columbia where beaver dams were removed in the late 1980s to “improve” fish passage and flood conveyance. A series of historical aerial photographs taken over a 36-year period between 1968 and 2004 recorded the physical changes to a 3-km section of the stream valley following removal of 18 beaver dams. In the 16 years following beaver dam removal, channel pattern changed from a multi-thread to single-thread form. The riparian area structure also changed from 69% open areas and 9% beaver ponds to 90% closed vegetation. The change in channel structure in Sandown Creek resulted in an estimated 5-times increase in the mean flow velocity and an additional 648 m3 of sediment available for transport. These findings provide the empirical data needed to verify long-standing assumptions about the ability of beaver ponds to effectively trap sediment and reduce bankfull flow velocity. The results of this study also underscore the speed and magnitude of alterations in the channel and riparian area structure in response to beaver loss in British Columbia�s mountain valleys. While the physical removal of beavers and beaver dams may be a practice of the past, wildland managers may still be inadvertently compromising the sustainability of beavers and associated wetlands in many areas of British Columbia by failing to adequately manage riparian areas to maintain beaver habitat.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 it