Part B, Working Papers, February 1974 - Special Collections - US ...

Species Compos ft Ion in the Permanent Ouadrant> 5 r .^ears_ After DenudationThe Impression given by the permanent quadrat five years after denudationwas that ^ the area was dominated by — F. odoratum._______„_„ The vegetation was so dense thatIt was difficult to penetrate. E_. odoratum, vMch appeared to bethe dominant species, thrived well with height ranging from 2 to 4 meters. Thereoccurredsome amounts of S_. spontaneum with averaae height of about 't.SO meters.Under the continuous canopy o^ E_. odpratum a certain amount of Imperata cy 11ndr!cawas also found.Five years after denudation, no tree species have been found-to have reachedthe sapling stage, although some o^ them had Invaded the first year.Throughoutthe area, however, the climbing plants--e.g., Smilax sp., CnetIs sp., and Anamiraacocciilus—were common. Fern was also present under Fupatorium. Due to the difficultyof working In the plot, f our 2x2 meter guadrats were laid down randomly and all theseedllnos within the guadrats were counted.From the results shown in Table II-2,It can be seen that tree species from the original evergreen forest are stillinvadlno, but none have reached the sapling size. Only Eupa tor! urn became a dominantplant In the fifth year, tonether with some amount of Saccharum scattering amongthem.From seedling enumeration it Is evident that Fupa tor him Is still regenerating.Species Compositionin the Area That Has Been Abandoned for 12 YearsThis piece of forest was cleared for the cultivation of chili, maize, andocastor plants. The area was about 1*J rats (1 rai - 1600 m ) in size. The numberof years that this area had been under cultivation prior to abandonment was notknown.At the time o fobservation, Saccharum sponjraneum was found to be the dominantsoectes. Several tree species now reached the sapling sizewith canopies lifted above fu spontaneum.Fupatorium, however, was frequentlyfound throughout the area.In 1 *»£