Aquatic System - Toronto and Region Conservation Authority

More documents

Recommendations

Info

FMZ 2: Berczy CreekFigure 8-12 summarizes the existing conditions of Berczy Creek (FMZ 2) located in theheadwaters of the Rouge River watershed. Overall, the habitat in the zone is of high quality,evidenced by an abundant redside dace population present in the lower reaches of BerczyCreek likely maintained by the presence of local groundwater discharge. There are no brooktrout in this zone as the headwater habitat is generally warmer relative to adjacentsubwatersheds. There is an instream barrier that splits the available redside dace habitat,allowing only downstream movement of redside dace as they can not re-negotiate the barrierand return to upstream habitat. Both rainbow trout and brown trout are stocked above thisbarrier into redside dace habitat. Sampling records have found adult rainbow and brown troutabove the barrier, so it is assumed that these species are able to jump the existing structure.Upstream landuse is largely agricultural with limited forest cover which may be a factor inwarmwater conditions persisting in upstream reaches. Multiple golf courses are also presentwhich can have impacts on water quality/quantity and loss of riparian vegetation.Stream Health: FMZ 2Table 8-9 summarizes the indictors of stream health for Berczy Creek (FMZ 2). Aquaticsystems warm with downstream progression unless, as in Berczy, large amounts ofgroundwater discharge occur along the way. The cool- warm trend in Berczy is interrupted midwaythrough the zone as groundwater inputs modify the habitat and we see populations ofredside dace supported. The stream data (IBI and CCA scores) mark this trend with “fair’ to“good” ratings upstream and downstream of the discharge zones, respectively, with thefurthest downstream habitat becoming warmwater.The unstable temperature calculation in 2005 is confined within the short warmwater reachabove the groundwater discharge zone, suggesting upstream impacts maybe occurring inaddition to the natural warming gradient. However, the groundwater appears to mitigate theupstream warming trend at the reach level. The benthic invertebrate data follows a differenttrend with the impaired site occurring within the discharge zone and the non-impaired sitescoincident with only “fair” IBI ratings. The confounding issues around benthic invertebrates arediscussed in Appendix A and from that, it is possible that the benthic communities in thesesites are more sensitive to habitat than water quality.Table 8-9: Stream Health of Berczy Creek - FMZ 2Target SpeciesRSD, ABL, BM, RDIBI RatingBAA RatingTemperature RatingCCA CA Score2003 2005 2003 2003 (OSAP) 2005 (Wehrly) 20020 VG1 G3 F0 P0 VG1 G0 F0P2 unimpaired1 impaired3 mod stable 2 mod stable1 unstablewarm: mid-rangeNo. Stations 4 1 2 3 3Note: the listed “year” indicates from which data set the ratings/scores are based upon. 2003 IBI combines RWMPand FMP stations sampled in that year. 2005 IBI are only FMP stations. See Figure 8-5 for IBI Station Locations. VG=Very Good, G = Good, F= Fair, P = Poor.8-35
Figure 8-1212: : Existing Conditions and Issues in Berczy Creek (FMZ 2)Note: The thermal regime represents actual stream temperatures which have been interpreted for development and application ofTiming Windows as found in the Rouge River FMP.8-36
Page 1 and 2: Rouge RiverState of the Watershed R
Page 3 and 4: Rouge River is unique in that migra
Page 5 and 6: LIST OF TABLESTable 8-1: Indices an
Page 7 and 8: The current rate and distribution o
Page 9 and 10: Figure 8-1: : High Groundwater Disc
Page 11 and 12: 8.3.1 Reporting Aquatic Data: Appro
Page 13 and 14: 8.3.2 Methodologyology: Field Data
Page 15 and 16: Benthic Invertebrate DataThe Region
Page 17 and 18: Total Stream LengthThe entire water
Page 19 and 20: discussion of Fish CCA scores and t
Page 21 and 22: Aquatic Invasive Species (AIS)A spe
Page 23 and 24: Figure 8-8: : Thermal Stability8-18
Page 25 and 26: The report entitled “TRCA Aquatic
Page 27 and 28: 8 4 KennedyTributary9 4 McCowanTrib
Page 29 and 30: 26 8 MorningsideCreekWeirs that con
Page 31 and 32: Fish ConsumptionFish consumption ad
Page 33 and 34: Figure 8-1010: Existing Conditions
Page 35 and 36: The predicted CCA score identifies
Page 37 and 38: Figure 8-1111: : Existing Condition
Page 39: Fish Community Structure: FMZ 10Tab
Page 43 and 44: FMZ 3: Bruce CreekFigure 8-13 summa
Page 45 and 46: Note: The thermal regime represents
Page 49 and 50: Fish Community Structure: FMZ 4Tabl
Page 53 and 54: Species NameScientific NameLast Rec
Page 55 and 56: Stream Health: FMZ 6Table 8-17 summ
Page 57 and 58: Little Rouge and is quite a differe
Page 59 and 60: Stream Health: FMZ 7IBIs calculated
Page 63 and 64: Table 8-2121: Stream Health of Lowe
Page 65 and 66: community, nesting shore birds and
Page 69 and 70: In terms of determining an overall
Page 71 and 72: Aquatic Habitat FeaturesMeasures an
Page 73 and 74: FishPassageIn-streamBarriers253* On
Page 75 and 76: 8.6 Summary and Management Consider
Page 77 and 78: 8.7 ReferencesBarbour, M., T. Gerri
Page 79 and 80: Publication of the American Fisheri
Page 81 and 82: in the Rouge River watershed, as we
Page 83 and 84: Total Stream LengthStream length is
Page 85 and 86: discharge, sewage effluent, etc.).

Aquatic System - Toronto and Region Conservation Authority

Create successful ePaper yourself

Delete template?

Save as template?