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Title: Mai Po update (Jan 04) Post by Lew_Young on Jan 6th, 2004, 10:11pm MAI PO UPDATE (JANUARY 2004) 1. Drain down of gei wai 12 and 13 If you are a regular visitors to Mai Po in winter, then you would have noticed that many of the fishponds are often kept drained after fish harvesting. This is in order to oxidize any non-decomposed organic material that may have built up on the pond floor, such as fish feed or droppings from the fish. Air-drying of the floor of the pond in this way helps to maintain the water quality in the pond As with the fishponds, the gei wai inside Mai Po have traditionally also been kept drained after fish harvesting in winter to allow air-drying of the pond floor. However, as fish have not been harvested at Mai Po since around 1996, air-drying of the pond floor has not been carried out as often and this is beginning to have an effect on the water quality in the gei wai. As a result, gei wai 12 and 13 will be kept drained for at least until the end of January, to remove the non-decomposed material that have built up on the pond floor and which will otherwise affect the water quality. 2. Reed cutting in gei wai 8 As part of the long-term study to find a strategy for managing the reedbeds at Mai Po, one of the five 1 ha blocks of reeds will be cut and removed off-site this January. The aims will be set up four blocks of reeds of different ages (plus a fifth block that will be used as a control), and then to see if there are differences in how birds use these different aged blocks. The eventual results will tell us whether in future, the Reserve needs to set up blocks of reeds of different ages to attract different species of birds. If you have any questions about these works, then please contact the staff at Mai Po by telephone on 2471-6306 or by e-mail <maipo@wwf.org.hk>. Many thanks and enjoy your birding at Mai Po! |
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