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Appendix C: Sunirrau~ of IHA Parurraeters and their Ecosystem Influences <br />IHA PARAMETER GROUP HYDROLOGIC ECOSYTEM INFLUENCES <br /> PARAMETERS <br />1. Magiuh~de of montlily Mean or median value for - Habitat ayailabilit<- for aquatic <br />water conditions each calendar month orgaiusms <br /> ,S~iUtotczl 12 pc~rc~rneters - Soil moishare ayailabilit< for <br /> plants <br /> - Availabilit< of water for <br /> terrestrial aiumals <br /> - Availabilin_- of food/cover for <br /> fi~rbearing manunals <br /> - Reliabilitc• of ~yater supplies for <br /> terrestrial aiumals <br /> - Access by predators to nesting <br /> sites <br /> - Influences water temperahue, <br /> olygen levels, photosynthesis in <br /> ~a ater colmmi <br />2. Magiuh~de and duration of Animal nuiuma 1-day mean - Balance of competitive, <br />armual eltreme water Animal nuiuma, 3-day means rnderal,and stress-tolerant <br />conditions Animal nuiuma, 7-day means orgaiusms <br /> Animal nuiuma, 30-day - Creation of sites for plant <br /> means coloiuzation <br /> Amoral nuiuma 90-day - Strnchuing of aquatic <br /> means ecos~-stems by abiotic ys. biotic <br /> Animal maiima, 1-dav mean factor <br /> Amoral maiima, 3-day means - Strnch~ring of riser chamiel <br /> Amoral maiima, 7-day means morphology and physical <br /> Amoral maiima, 30-dav means habitat conditions <br /> Amoral maiima, 90-day means - Soil moisture stress in plants <br /> Number of zero-flo« days - Dehydration in aiumals <br /> Base flow: 7-day nuiunnun - Anaerobic stress in plants <br /> flow/mean floly for year - Volume of nuhient eichanges <br /> beriveen rivers and floodplaii~s <br /> b'z~btotal 12~arcrmeters - Duration of stressfi~l conditions <br /> such as low olygen and <br /> concentrated chenucals in <br /> aquatic enviromnents <br /> - Distribution of plant <br /> comnnuuties in lakes, ponds, <br /> floodplains <br /> - Duration of high flows for <br /> waste disposal, aeration of <br /> spa~a rung beds in chamiel <br /> sediments <br />3. Timing of animal Julian date of each animal - Compatibilit<~ with life cycles of <br />eltreme water conditions 1-day malinnun orgaiusms <br /> Julian date of each animal - Predictabilit< /avoidabilit< of <br /> 1-day nuiunnun stress for orgaiusms <br /> - Access to special habitats <br /> b'~~Utotczl 2 pc~rc~rneters during reproduction or to avoid <br /> predation <br /> - Spalviung cues for nugrator< <br /> fish <br /> - Eyohrtion of life luston <br />53 <br />