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【后海灣一分鐘】四、為什麼雀鳥成為魚塘生態功能的重要指標?

2019/2/15 — 11:46

由規劃署委託顧問進行的「后海灣地區魚塘生態價值研究」 (1997) ,雀鳥被指定為魚塘生態功能的重要指標,原因包括:

  • 雀鳥位於食物鏈高層,涵蓋的地域相對其他物種較廣闊,能夠反映環境的健康狀況
  • 雀鳥全年可見,並可直接觀察
  • 鳥類分類學較成熟 ,而且能在一個不造成干擾的距離下辨認鳥種
  • 無論在本地、區域或國際層面,雀鳥相對於其他物種有較全面的資料及紀錄
  • 雀鳥是后海灣地區重點保育的物種

此外,現時已經累積大量在后海灣地區的雀鳥紀錄供研究及分析。本會自 1979 年開始在后海灣地區進行水鳥監察。自 1997 年起,漁農自然護理署一直委託本會在后海灣進行水鳥監察,並將調查增加至一個月一次。長期的鳥類觀察能協助我們了解及估計后海灣雀鳥的數量及趨勢。

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【Deep Bay In A Minute】4. Why bird was selected as an indicator of the ecological function of fishponds? 

In the “Study on the Ecological Value of Fishponds in the Deep Bay Area” (1997) commissioned by the Planning Department, bird was selected as the key indicator of the ecological function of fishponds, because:

  • Birds are at the highest levels in the food web, and presume birds in general require more territorial space, thus they can represent the health status of the environment.
  • Birds are present all year round and can be observed directly.
  • Birds are taxonomically well known and can be identify at a distance without disturbance.
  • Birds are better documented than other wildlife locally, regionally and globally.
  • Birds are one of the key conservation targets in the Deep Bay area.

In addition, there is a long dataset of bird records in the Deep Bay area for analysis. HKBWS started monitoring of waterbirds in the area since 1979. It was expanded to monthly waterbird count with funding support from the Agriculture, Fisheries and Conservation Department since 1997. Long term monitoring provides important information on the population and trends of waterbirds in the Deep Bay wetlands.

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