BEAVER - MEDIATED ANASTOMOSED STREAMS - C LASSIFIED Mark Beardsley - PowerPoint PPT Presentation

BEAVER - MEDIATED ANASTOMOSED STREAMS - C LASSIFIED Mark Beardsley & Jessica Doran

The first step in wisdom is to know the things themselves; objects are distinguished and known by classifying them methodically and giving them appropriate names. Therefore, classification and name-giving will be the foundation of our science. Carolus Linnaeus Systema Naturae (1735)

Carolus Linnaeus Systema Naturae (1735)

C4 R EFERENCE A PPLICATIONS • A SSESSMENT ( DEPARTURE , EVOLUTION ) • R ESTORATION (NCD) • I NVENTORY ( WATERSHED FUNCTION )

Beaver-mediated meadow streams. Functions and services D B Water storage/ retention

T HE D B S TREAM TYPE • ANASTOMOSED • BEAVERS - DAMS , PONDS , CHANNELS • FLOODPLAIN CONNECTION (H<<H C ) • STABLE OR AGGRADING (Qs in ≥ Qs out ) • VARIABLE W/D, K, S

S TREAM E VOLUTION M ODEL D B C or E D or C Cluer and Thorne (2013) A Stream Evolution Model Integrating Habitat F G and Ecosystem Benefits. River Research and Applications.

WHAT ’ S SO DAM D B IMPORTANT ? • D B IMPORTANT FUNCTIONS C • D B → C/E CONVERSION • C/E → D B RESTORATION

D B FUNCTIONS Hydrology Habitat/wetland Water quality Floodplain connection Vegetation Temp. regulation Water structure/diversity Filtration storage/retention Aquatic habitat Nutrient cycling Base flow diversity Sediment maintenance Fisheries support storage/retention Flood attenuation Wildlife support Groundwater exchange

C/E (1) D B (0) Pre- settlement D B D B → C CONVERSION C/E D B (0) C/E (1) Present day

D B → C CONVERSION C (1) D B (0)

D B → C CONVERSION Land use patterns

D B → C CONVERSION Late 1800s Historic photos 2012

D B → C CONVERSION F LOODPLAIN LANDFORM & SOILS

R ESTORATION C → D B D B C C

S UMMARY D B ( STAGE 0) EXISTS ! D B HIGHLY FUNCTIONAL D B → C/E C/E → D B

S UMMARY D B ( STAGE 0) EXISTS ! D B HIGHLY FUNCTIONAL D B → C/E C/E → D B