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研究報告

Chapter 7 ECOLOGICAL FIELD SURVEY RESULTS - ECOLOGICAL VALUE ASSESSMENT

7.1 ECOLOGICAL VALUE ADJUSTMENT BASED ON FIELD SURVEYS
   
 
7.1.16 Cultivation (Indicative Ecological Value: Medium)
   
 

Ecological value of cultivation varied from high to low depending on the management status of the habitat. Habitats which were under active cultivation and therefore heavily disturbed (eg Site 139h) were downgraded to low value. Wet abandoned cultivated land (eg Site 143a) was assigned a high value as the habitat may provide suitable habitats for wetland species. It was noted that the identified wet abandoned cultivation (eg 143a and b) could possibly be developed into wetlands. Most of the medium or high valued cultivation habitats supported a number of vegetation species including invasive species (eg Alocasia odora). Fruit trees such as Euphoria longan and Litchi chinensis were also common in some of the surveyed areas (eg Site 139c). A number of avifaunal species were seen during field surveys indicating the importance of some of the habitats for wild birds (see Table G16 of Annex G for details). Cultivation sites where ecological value was adjusted are listed in Table 7.1p.

Table 7.1p Rationale for Ecological Value Adjustment of Cultivation Habitats based on Field Surveys
Site No. Site Name Sub-site

Ecological Value After Field Assessment

Rationale for Ecological
Value Re-adjustment

139 Kam Tin h Low

Habitat was found to be an intensively
cropped land with regular disturbance.

141 Fanling a Low

Habitat used as plant nurseries for horticulture.

b High

Habitat composed of wet abandoned cultivation.

142 Ting Kok d High

Habitat composed of wet abandoned cultivation.

143 Shap Sze Heung a High

Extensive abandoned cultivation with higher structural heterogeneity than other cultivated land.

b High

Habitat composed of wet abandoned cultivation and located close to natural streams and a mangrove.

   
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最近修訂日期: 二零零五年十二月二十二日