Dr. Stan Gregory Department of Fisheries & Wildlife Oregon State University
Vannote et al. 1980
15 N tracer recovered (%) Forest Streams Agricultural Streams Urban Streams Organic matter 9 – 58 8 – 64 38 – >99 Gaseous ...
Frady 2005
Banks 2005
Gregory et al. 1991
 
 
OG  VanSickle & Gregory 1990 CC  VanSickle & Gregory 1990 OG  Murphy and Koski 1989 OG  McDade et al.1990
 
 
Hypothesis <ul><li>Aquatic </li></ul><ul><li>Slow </li></ul><ul><li>Physical </li></ul><ul><li>Surface </li></ul><ul><li>T...
Aquatic Placement
Terrestrial Placement
Alnus   rubra  Decay Progression Aquatic Terrestrial Year 2 Year 6 Year 14
Pseudotsuga   menziesii  Decay Progression Aquatic Terrestrial Year 2 Year 6 Year 14
 
 
 
<ul><li>Resident trout populations (Mack Creek) </li></ul><ul><ul><li>CV = 26% </li></ul></ul><ul><li>Anadromous salmon po...
<ul><li>Flynn Creek </li></ul><ul><ul><li>Before logging  CV = 39% </li></ul></ul><ul><ul><li>After logging  CV = 42% </li...
 
 
 
 
 
Flynn Creek
Deer Creek
Needle Branch
 
 
 
<ul><li>Stream Flynn Deer Needle </li></ul><ul><li>1959-65 2.24 3.01 2.34 </li></ul><ul><li>1966-74 1.58 3.73 3.13 </li></...
<ul><li>Stream Flynn Deer Needle </li></ul><ul><li>1959-65 3.65 2.74 3.34 </li></ul><ul><li>1966-74 3.42 2.80 1.71 </li></...
 
Arkle and Pilliod 2010
Arkle and Pilliod 2010
Arkle and Pilliod 2010
<ul><li>Increased aquatic primary production </li></ul><ul><li>Increased nutrient uptake by algae </li></ul><ul><li>Increa...
<ul><li>Increased temperature can decrease growth, increase disease, increase competition, and cause mortality </li></ul><...
<ul><li>Decreased inputs of large wood  </li></ul><ul><ul><li>Decreased habitat complexity </li></ul></ul><ul><ul><li>Decr...
 
<ul><li>Proportion of landscape and river network in early seral forests </li></ul><ul><li>Proportion of riparian areas in...
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What About Riparian Systems Who Benefits From An Early Seral Forest Condition

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What About Riparian Systems Who Benefits From An Early Seral Forest Condition

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What About Riparian Systems Who Benefits From An Early Seral Forest Condition

  1. 1. Dr. Stan Gregory Department of Fisheries & Wildlife Oregon State University
  2. 2. Vannote et al. 1980
  3. 3. 15 N tracer recovered (%) Forest Streams Agricultural Streams Urban Streams Organic matter 9 – 58 8 – 64 38 – >99 Gaseous N 2 and N 2 O loss <1 1 – 15 <1 – 10 Downstream loss as NO 3 55 – 79 44 – 89 <1 – 53
  4. 4. Frady 2005
  5. 5. Banks 2005
  6. 6. Gregory et al. 1991
  7. 9. OG VanSickle & Gregory 1990 CC VanSickle & Gregory 1990 OG Murphy and Koski 1989 OG McDade et al.1990
  8. 12. Hypothesis <ul><li>Aquatic </li></ul><ul><li>Slow </li></ul><ul><li>Physical </li></ul><ul><li>Surface </li></ul><ul><li>Terrestrial </li></ul><ul><li>Fast </li></ul><ul><li>Biological </li></ul><ul><li>Deep </li></ul>
  9. 13. Aquatic Placement
  10. 14. Terrestrial Placement
  11. 15. Alnus rubra Decay Progression Aquatic Terrestrial Year 2 Year 6 Year 14
  12. 16. Pseudotsuga menziesii Decay Progression Aquatic Terrestrial Year 2 Year 6 Year 14
  13. 20. <ul><li>Resident trout populations (Mack Creek) </li></ul><ul><ul><li>CV = 26% </li></ul></ul><ul><li>Anadromous salmon populations (Coast Range) </li></ul><ul><ul><li>CV = 60% </li></ul></ul>
  14. 21. <ul><li>Flynn Creek </li></ul><ul><ul><li>Before logging CV = 39% </li></ul></ul><ul><ul><li>After logging CV = 42% </li></ul></ul><ul><li>Needle Branch </li></ul><ul><ul><li>Before logging CV = 39% </li></ul></ul><ul><ul><li>After logging CV = 130% </li></ul></ul>
  15. 27. Flynn Creek
  16. 28. Deer Creek
  17. 29. Needle Branch
  18. 33. <ul><li>Stream Flynn Deer Needle </li></ul><ul><li>1959-65 2.24 3.01 2.34 </li></ul><ul><li>1966-74 1.58 3.73 3.13 </li></ul><ul><li>1988-96 1.75 2.20 3.24 </li></ul><ul><li>CV (standard deviation/mean) </li></ul><ul><li>1959-65 23.7 17.2 33.5 </li></ul><ul><li>1966-74 55.0 39.7 67.6 </li></ul><ul><li>1988-96 28.6 39.1 55.7 </li></ul>
  19. 34. <ul><li>Stream Flynn Deer Needle </li></ul><ul><li>1959-65 3.65 2.74 3.34 </li></ul><ul><li>1966-74 3.42 2.80 1.71 </li></ul><ul><li>1988-96 2.16 2.10 1.79 </li></ul><ul><li>CV (standard deviation/mean) </li></ul><ul><li>1959-65 47.9 40.3 16.6 </li></ul><ul><li>1966-74 14.5 22.7 45.3 </li></ul><ul><li>1988-96 35.3 24.8 66.5 </li></ul>
  20. 36. Arkle and Pilliod 2010
  21. 37. Arkle and Pilliod 2010
  22. 38. Arkle and Pilliod 2010
  23. 39. <ul><li>Increased aquatic primary production </li></ul><ul><li>Increased nutrient uptake by algae </li></ul><ul><li>Increased quality of allochthonous inputs </li></ul><ul><li>Increased temperature can increase growth and rates of biological processes </li></ul>
  24. 40. <ul><li>Increased temperature can decrease growth, increase disease, increase competition, and cause mortality </li></ul><ul><li>Decreased uptake of nutrients by riparian plants </li></ul>
  25. 41. <ul><li>Decreased inputs of large wood </li></ul><ul><ul><li>Decreased habitat complexity </li></ul></ul><ul><ul><li>Decreased refuge during floods </li></ul></ul><ul><ul><li>Decreased channel stability </li></ul></ul><ul><ul><li>Decreased food and nutrient retention </li></ul></ul>
  26. 43. <ul><li>Proportion of landscape and river network in early seral forests </li></ul><ul><li>Proportion of riparian areas in early seral stages </li></ul><ul><li>Network patterns of environmental factors, nutrients, and physical structure </li></ul><ul><li>Network pattern of aquatic ecosystems </li></ul>
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