A deeper understanding of river habitat-scale ecohydraulics: interpreting the relationship between habitat type, depth and velocity using knowledge of sediment dynamics and macrophyte growth

• Autorzy: Kemp J.L. , Harper D.M. , Crosa G.A.
• Języki publikacji: EN

Abstrakty

EN

Late spring/summer depth and velocity conditions of 16 ‘functional habitats’ were investigated in lowland rivers. The habitats significantly associated with shallower, faster areas were 'submerged, fine-leaved macrophytes' (20-40 cm deep, >0.45 ms-1) and 'macroalgae' (10-30 cm, >0.60 ms-1). 'Cobbles' were associated with slightly slower, shallower conditions (0-20 cm, 0.45 ms-1), 'gravels' with slower conditions again (around 0.15 ms-1, depths from 0-30 cm). The slowest velocity class (0-0.05 ms-1) was associated with 'silt' (depths 20-70 cm), ‘marginal plants' (0-20 cm deep), 'emergent macrophytes' (10-80 cm deep), 'submerged, broad-leaved macrophytes' (40-110 cm deep), 'floating leaved macrophytes' (40-150 cm deep) and a second mode of ‘macroalgae’ (145-180 cm deep). The factors thought to be behind these findings are discussed.

Słowa kluczowe

EN

physical control; habitat type; relationship; macrophyte growth; ecohydraulics; sediment dynamics; depth; ecohydrology; macroinvertebrate; velocity; lowland

• Wydawca: -
• Czasopismo: International Journal of Ecohydrology and Hydrobiology
• Rocznik: 2002
• Tom: 02
• Numer: 1-4
• Opis fizyczny: p.271-282,fig.,ref.

Twórcy

autor

Kemp J.L.

• University of Leicester, University Road, Leicester LE1 7RH, England, U.K.

autor

Harper D.M.

autor

Crosa G.A.