Northwest Forest Plan—the first 25 years (1994–2018): watershed condition status and trends

Dunham, Jason B.; Hirsch, Christine; Gordon, Sean N.; Flitcroft, Rebecca; Chelgren, Nathan D.; Snyder, Marcia N.; Hockman-Wert, David; Reeves, Gordon H.; Andersen, Heidi Lie; Anderson, Scott; Battaglin, William A.; Black, Tom; Brown, Jason; Claeson, Shannon M.; Hay, Lauren; Heaston, Emily D.; Luce, Charles H.; Nelson, Nathan; Penn, Colin A.; Raggon, Mark.

doi:10.2737/pnw-gtr-1010

Cited by 2 publications

(2 citation statements)

References 172 publications

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“…The turnover rate in the second growth was 0. Monitoring over the three decades since 1994 shows an increasing amount of large trees in riparian areas but a decline in the amount of large wood in channels, reflecting the legacy of land use management and time lags (Dunham et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…Such lags between forest development and increases in wood abundance in stream channels have been demonstrated by a broader trend on federal lands across the Pacific Northwest following the implementation of the Northwest Forest Plan. Monitoring over the three decades since 1994 shows an increasing amount of large trees in riparian areas but a decline in the amount of large wood in channels, reflecting the legacy of land use management and time lags (Dunham et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

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Long‐term dynamics of large wood in old‐growth and second‐growth stream reaches in the Cascade Range of Oregon

Gregory,

Ashkenas,

Wildman

et al. 2024

River Research & Apps

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We quantified temporal dynamics of wood storage, input, and transport over a 24‐year period in adjacent old‐growth and second‐growth forested reaches in Mack Creek, a third‐order stream in the Cascade Range of Oregon. The standing stocks of large wood in the old‐growth reach exceeded those at the second‐growth reach by more than double the number of wood pieces and triple the wood volume. Annual inputs of large wood were highly variable. Wood numbers delivered into the old‐growth reach were 3× higher and wood volume 10× greater than in the second‐growth reach. The movement of number and volume of logs did not differ significantly between the two reaches over time. Less than 2% of the logs moved in most years, and the highest proportion moved in the year of the 1996 flood (9% in old growth and 22% in second growth). Most of the large wood aggregated as jams in both reaches. The second‐growth reach lacked major jams, but 29% of the logs in the old growth were in full‐channel spanning jams. Long‐term observations of annual storage, input, and movement reveal the temporal dynamics of wood rather than static representations of the characteristics of wood. Input events and transport of wood in Mack Creek were episodic and varied greatly over the 24‐year study, which illustrates one of the major challenges and opportunities for understanding the cumulative dynamics of wood in streams.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%