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Coarse-scale riverine process domains of Pacific Northwest drainage basins

Coarse-scale riverine process domains of Pacific Northwest drainage basins. Montgomery, David R. 1999. Process Domains and the River Continuum. J. Am. Water Res. Assoc. Vol. 35, no. 2. Process Domains Conceptual Model. Headwater Reaches Colluvial Transfer Reaches Bedrock Cascade

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Coarse-scale riverine process domains of Pacific Northwest drainage basins

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  1. Coarse-scale riverine process domains of Pacific Northwest drainage basins Montgomery, David R. 1999. Process Domains and the River Continuum. J. Am. Water Res. Assoc. Vol. 35, no. 2.

  2. Process Domains Conceptual Model • Headwater Reaches • Colluvial • Transfer Reaches • Bedrock • Cascade • Step-pool • Depositional Reaches • Plane-bed • Pool-riffle • Regime • Braided Montgomery 1999

  3. Carl Sammons Process Domains and the Aquatic and Riparian Herpetofauna: An Ecogeographic Study of the Mattole Watershed Hartwell H. Welsh, Jr. and Garth R. Hodgson Redwood Sciences Laboratory, Arcata, California

  4. Kilometers 0 2 4 6 Geomorphic Process Domains of the Mattole Mattole Watershed Longitudinal profiles Cascade Step pool Plane bed Pool riffle 1 Petrolia Honeydew 2 3 Ettersburg Channel morph. Type 1 Cascade 2 Step pool 3 Plane bed 4 Pool riffle 4 Whitethorn N Shelter Cove

  5. NMS2 I II III IV Reach Types based on Non-metric Multidimensional Scaling Ordination • Variables used in NMS ordination: • Sub-basin area • Roughness • Slope • Substrates I II NMS2 groups Reach Type I Reach Type II Reach Type III Reach Type IV III IV

  6. NMS2 I II III IV

  7. Species Distribution by Process Domains Amphibian richness Rough-skinned newt Coastal giant salamander I II III IV Channel Types I II III IV Channel Types I II III IV Channel Types Tailed frog S. torrent salamander I II III IV Channel Types I II III IV Channel Types

  8. Water temperature Canopy closure Water temperature (oC) Canopy closure (%) I II III IV Channel types I II III IV Channel types Key Differences Between Channel Types

  9. Water Temperature niches of four species 15.8 Coho DITE ASTR RHVA 12.8 11.7 11.4 Water temperature (oC) Water Temperature Realized Niches

  10. The Stream Continuum Concept the network environment changes continuously and predictably Abiotic gradients Flow rate Light Water temperature Water chemistry Substrate composition Larger in smaller streams Biotic gradients Bacteria more in slower water Primary producers Phytoplankton and periphyton Macroinvertebrates Insects to crayfish Vertebrates Large rivers have more species

  11. Tailed Frog Southern Torrent Salamander Late Seral Petrolia Honeydew Ettersburg Pacific Ocean Whitethorn N Shelter Cove km 0 1 2 3 4 5 Late-seral Forest in the Mattole in 1947 and 1997 1947 1997 Data from: Welsh, H. H. Jr., G. R. Hodgson, and A. J. Lind. 2005. Ecogeography of the herpetofauna of a Nothern California watershed: linking species patterns to landscape processes. Ecography, Vol. 28: 521-536.

  12. Olson, D. H., P. D. Anderson, C. A Frissell, H. H. Welsh, Jr., D. F. Bradford. 2007. Biodiversity management approaches for stream-riparian areas: Perspectives for Pacific Northwest headwater forests, microclimates, and amphibians. Forest Ecology and Management 246: 81-107.

  13. > 30 %

  14. 10 m

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