An investigation of Caesium-137 at reference locations in Hong Kong

Ruse, M. E.

doi:10.5353/th_b3124093

Cited by 1 publication

(1 citation statement)

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“…This was confirmed by pH values of 4. 35-4.82 and 4.13-4.38 from two soil pits in the area (Ruse, 1999). Peart et al (1995) and Sequeira and Peart (1995) demonstrate the occurrence of acid rain, the latter reporting a median rainfall pH of 4.6 at the nearby Kadoorie Agricultural Research Centre.…”

Section: Annual Harvestingmentioning

confidence: 93%

The Effects of Annual Harvesting on the Subsequent Phytomass and Species Composition of Grassland and Fernland: A Hong Kong Case

Hill

Peart

Guan

2004

Singap J Trop Geogr

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Anthropogenic grasslands mixed with fern and shrubland, on scales from metres to kilometres, are widespread in tropical Southeast Asia, and especially in southern China and adjoining regions where harvesting for domestic fuel is a major factor in their maintenance. Baseline surveys in grassland and fernland in 1989-90 and resurveys in 2001 of three 6 x 20 m plots in Wong Chuk Yuen, Hong Kong, showed substantial change in species composition and total aboveground phytomass as a result of annual harvesting, with more pronounced change in the fernland.Under harvesting pressure, the species composition of the grassland changed considerably, though the proportions of the various life-forms did not. Ischaemum spp. and Miscanthus floridulus increased whereas Themeda gigantea died out while the proportion of other grass species remained much the same. Under the same regime the species composition and life-forms of the fernland changed markedly. The proportion of Dicranopteris fern dropped substantially, though still comprising a third of the phytomass by 2001. The shrub Melastoma survived harvesting. A firebreak cut in the fernland became grassy under annual harvesting and remained grassy six years after cutting ceased. The annual harvests from the growth-years 1991-2000 showed a substantial though variable increase in total phytomass. Analyses relating harvested phytomass with various climatic parameters showed no significant correlations. Some possible reasons for this are suggested. Although annual harvesting was clearly sustainable over the ten years of observation, the question of continued sustainability on sites harvested for centuries, the situation in much of southern China and parts of upland mainland Southeast Asia, remains unresolved.

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Section: Annual Harvestingmentioning

confidence: 93%