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September 2018 TRANSPORT FOR CAPE TOWN ENVIRONMENTAL MANAGEMENT DEPARTMENT Kyran Wright Reserve Supervisor T: 021 444 1485 E: [email protected] ZANDVLEI ESTUARY NATURE RESERVE QUARTERLY REPORT July- September 2018 Table of Contents Page 1. EXECUTIVE SUMMARY ......................................................................................................................................................... 2 2. HIGHLIGHTS & CHALLENGES .............................................................................................................................................. 2 3. CONSERVATION PLANNING ............................................................................................................................................. 2 4. FLORA .................................................................................................................................................................................... 2 5. FAUNA ................................................................................................................................................................................... 3 6. SOIL ........................................................................................................................................................................................ 3 7. WATER ................................................................................................................................................................................... 4 8. FIRE ......................................................................................................................................................................................... 4 9. PEOPLE, TOURISM & EDUCATION ...................................................................................................................................... 4 10. STAFF ...................................................................................................................................................................................... 8 11. LAW ENFORCEMENT ........................................................................................................................................................... 8 12. INFRASTRUCTURE & EQUIPMENT ........................................................................................................................................ 9 Zandvlei Estuary Nature Reserve | Zandvlei-natuurreservaat | ULondolozo lweNdalo Zandvlei City of Cape Town Quarterly Report - 1 July to 30 September 2018 1. EXECUTIVE SUMMARY This quarter saw the appointment of a variety of new staff members (contract and permanent) as well as the acquisition of a new facility, the Kedestes project, ongoing Environmental Education programmes, the Peninsula Paddle and ongoing Reserve activities. 2. HIGHLIGHTS & CHALLENGES Highlights Highlights for the quarter included: The acquisition of the False Bay Rendezvous Hall facility as a ZENR property The appointment of a new Reserve Manager, Kyran Wright The appointment of Muizenberg East Assistant Conservation Manager, Robyn Morton The appointment of ten EPWP workers on a year-long contract The 9th annual Peninsula Paddle Challenges Challenges for the quarter included: The high volumes of litter entering the vlei during storm events, overwhelming the litter traps in place along inlet rivers Ongoing poaching concerns Security of staff when travelling through the surrounding communities given protest action and gangsterism 3. CONSERVATION PLANNING The Biodiversity Branch Manager’s Annual Report was presented to Subcouncil 19 and 20 on 17 and 19 September, respectively. Regional Manager, Dalton Gibbs and Reserve Supervisor, Kyran Wright conducted the presentations. 4. FLORA Invasive species: Wildwood Island: 10 days were spent clearing aliens on Wildwood Island. Vicia removal was conducted. Northern section: 20 days were spent on alien clearing in Zandvlei Nature Reserve. Vicia removal and follow-ups of Port Jackson were conducted. Westlake wetlands: 10 days were spent on alien clearing in the Westlake Wetlands. Vicia removal was conducted. 2 Zandvlei Estuary Nature Reserve | Zandvlei-natuurreservaat | ULondolozo lweNdalo Zandvlei City of Cape Town Quarterly Report - 1 July to 30 September 2018 5. FAUNA Indigenous fauna management Monthly bird count: Three bird counts were conducted on the Wednesday closest to the 15 of each month. Quarterly night count: The quarterly night count was conducted in August. A team of 3 conducted the night count. Invasive Fauna Management One mallard was removed from ZENR. Research The Kedestes Butterfly Conservation Project was initiated in August 2017 and will take place at Zandvlei Estuary Nature Reserve and False Bay Nature Reserve, the project aims to secure the future of two threatened butterfly species, the first species Kedestes barberae bunta, is a Critically Endangered skipper butterfly poised on the edge of extinction. Endemic to the Cape Flats region it has an extremely low abundance estimated at just 50 individuals and is projected to go extinct within the next five years, in the absence of immediate conservation measures. With an EOO (extent of occurrence) of 15km2 and an AOO (area of occupancy) of 1km2, it has an extremely restricted range, with only one site locality remaining. The project will also concentrate on the Endangered Kedestes lenis lenis (EOO 1,787km2) with only five known localities. Most of the taxon's habitat on the Cape Flats has been destroyed with a reduction in habitat connectivity caused by urbanisation, alien invasive species and increased fire frequency. The project's long term aims are to prevent K.b.bunta from becoming extinct and improve and protect the remaining habitat in a holistic approach which benefits not only the butterflies but the system as a whole. This will be achieved through in situ conservation measures such as habitat restoration and protection and reintroduction at appropriate host sites. Research will also be carried out to establish abundance trends and new host sites for future reintroductions will be explored. Ex situ measures include the establishment of a captive rearing and breeding programme which has been deemed a necessity in order to secure the future of the species. Zandvlei Estuary Nature Reserve has been chosen as a host site for the reintroduction of K.b.bunta, as such the team have been working on preparing the host site in anticipation for the new arrivals in October. This has entailed planting new nectar sources, removing alien invasive species and transplanting the butterflies host plant (Imperata cylindrica) to encourage its spread. A UCT Masters student, Ms Olivia Venter, was granted permission to remove 300 Common sandprawn (Callichurus kraussi) from Zandvlei for her dissertation research. The project is seeking to determine how sandprawn impact water quality and their potential as bioremediation agents in estuaries. Ms Venter and her colleagues collected the specimens on 26 September. 6. SOIL Nothing to report. 3 Zandvlei Estuary Nature Reserve | Zandvlei-natuurreservaat | ULondolozo lweNdalo Zandvlei City of Cape Town Quarterly Report - 1 July to 30 September 2018 7. WATER Water level management The mouth was kept open longer than usual this quarter due to the late rains experienced in the catchment. Normal, scheduled closure and opening of the mouth resumed in September. Sewage spill A sewage spill was detected entering Zandvlei via the Sand River Canal on 29 September. City Reticulation officials were immediately notified and the input of raw effluent was halted later that same day. Emergency ad-hoc water sampling conducted on 2 and 4 October determined that e.coli levels were below the acceptable benchmark for intermediate contact and as such no further action was required. Reserve staff continue to monitor the waterways daily for any signs of pollutants entering the system. 8. FIRE Fire - Vegetation Frog-More Estate On 19/07/2018 at 18h36, Quemic Rangers received a call from Mr Mark Arendse (Acting Reserve Manager) concerning a vegetation fire at Frog-More Estate. Upon arrival, Rangers found Lakeside Fire Department (Fire Chief Hendricks) on the scene. Regional Integrity Team assisted the fire department and the fire was contained at 19h11. Rangers remained in the area until 19h30 to attend to any possible flare ups 9. PEOPLE, TOURISM & EDUCATION Stats summary Formal Environmental Education – from Excel Education support stats (at reserves, outreach, camps, holiday programmes etc.) Total number learners 542 Total number teachers 9 Total number adults 141 Total number scholars Total number schools Total number volunteers 5 (non repeat) Other: Other: Exhibitions and awareness (informal) Communities Name of exhibition/s Name and number of community meetings Total estimated Total number number persons community members (children and adults) attending meetings Awareness theme Peninsula Paddle Name and number 50 type (e.g. snake, fire) of community training sessions 4 Zandvlei Estuary Nature Reserve | Zandvlei-natuurreservaat | ULondolozo lweNdalo Zandvlei City of Cape Town Quarterly Report - 1 July to 30 September 2018 Total number persons Total number Wildwood circle 7 INDIRECTLY reached community members members (i.e. pamphlets attending training handed out) sessions Total number persons Other: DIRECTLY reached (i.e. talk/show) Events (concerts, open days, birdathons etc.) Guided hikes Name of event Peninsula Paddle Number of guided 13
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