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Title: M. Huston (1994b) pointed out that the well-documented pattern of increasing ann Post by: colleen on Feb 3, 2012 M. Huston (1994b) pointed out that the well-documented pattern of increasing annual primary production from the poles to the equator is strongly influenced by the longer growing season at low latitudes. The following data are from table 14.10 in Huston. The data cited by Huston are from Whittaker and Likens (1975).
Annual Length of Monthly NPP Growing Season NPP Forest Type (t/ha/yr) (months) (t/ha/mo) Boreal forest 8 3 2.7 Temperate forest 13 6 ? Tropical forest 20 12 ?_______ Complete the missing data to compare the monthly production of boreal, temperate, and tropical forests. How does this short-term perspective of primary production in high-, middle-, and low-latitude forests compare to an annual perspective? How does the short-term perspective change our perception of tropical versus high-latitude forests? Title: Re: M. Huston (1994b) pointed out that the well-documented pattern of increasing ann Post by: qew on Feb 14, 2012 Forest Type Annual Length of Growing Monthly
NPP Season NPP (t/ha/yr) (Months) (t/ha/mo) Boreal forest 8 3 2.7 Temperate forest 13 6 2.2 Tropical forest 20 12 1.7 Conclusions based on this short-term perspective would be exactly opposite those made using the long term perspective. Monthly primary production in high-, middle-, and low-latitude forests shows that, although growing seasons are shorter in boreal and temperate forests, the rate of primary production during growing season is higher. |