Stream temperature responses to forest harvest and debris flows in western Cascades, Oregon
Bibliographic record
Abstract
Stream temperature controls the rates of many biotic and abiotic processes and is influenced by changes in streamside land use practices. We compiled historic stream temperature data and reestablished study sites in three small basins in the H.J. Andrews Experimental Forest in the western Cascades, Oregon, to reexamine the effects on and re- covery of stream temperatures following removal of riparian vegetation. Maximum stream temperatures increased 7°C and occurred earlier in the summer after clear-cutting and burning in one basin and after debris flows and patch-cutting in another. Diurnal fluctuations in June increased from approximately 2 to 8°C. Stream temperatures in both basins gradually returned to preharvest levels after 15 years. The influence of the primary factor controlling stream tempera - tures, shortwave solar radiation, was amplified following removal of riparian vegetation, and conduction between stream water and nearby soils or substrates also appeared to be an important factor. Shifts in the timing of summer maxima and greater increases in early summer stream temperatures could impact sensitive stages of aquatic biota. Resume : La temperature des cours d'eau regit le rythme de nombreux processus biotiques et abiotiques, et se trouve sous l'influence des changements dans les pratiques d'amenagement du territoire sur les rives. Nous avons compile les donnees historiques sur la temperature des cours d'eau et retabli des stations d'etude dans trois petits bassins de la fo - ret experimentale H.J. Andrews, dans l'ouest des Cascades (Oregon), pour reexaminer les effets de l'enlevement de la vegetation riveraine sur la temperature des cours d'eau, et le retablissement subsequent. Les temperatures maximales des cours d'eau ont augmente de 7°C, et les augmentations se sont produites plus tot dans l'ete, apres la coupe a blanc et le brulage dans un bassin, et apres des apports de debris et du jardinage par bouquets dans un autre. Les fluctua- tions diurnes en juin ont augmente d'environ 2 a 8°C. Dans les deux bassins, les temperatures des cours d'eau sont graduellement revenues aux niveaux pre-exploitation au bout de 15 ans. L'influence du principal facteur regissant la temperature des cours d'eau, le rayonnement solaire a ondes courtes, a ete amplifiee par suite de l'elimination de la ve- getation riveraine, et la conduction entre l'eau de la riviere et les sols ou les substrats adjacents semblait aussi un fac- teur important. Les changements dans l'occurrence des maximums d'ete, et les augmentations plus fortes des temperatures des cours d'eau au debut de l'ete, pourraient avoir un impact sur les stades vulnerables du biote aqua- tique. (Traduit par la Redaction) Johnson and Jones 39
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".