申論題

23. The rate of decon omposition can be measured using tea-bag decomposition experiment, at which a pair of commercial tea-bags (e.g,, Lipton) with green and rooibos tea are buried into the soil for three months, and then excavated and amount of decomposed tea measured. Use this method to see how the rate of decomposition changes along the elevation gradient in Taiwan; namely, compare decomposition in three types of the forest: lowland rain forest (500 m asl), submontane evergreen broadleaf forest (1200 m asl and mountain cloud forest (2000 m as). Define the hypothesis which can be tested, describe the study method, and describe what you expect to find (will decomposition increase or decrease with elevation, and why?) (Answer in English)