Espinas, Niño , Tolentino, Danielo .
Altitudinal Zonation of Pterophytes of the Midmountain Forest of Mount Makiling, Luzon Island, Philippines.
This study determined the different altitudinal zonations of the ferns in the midmountain forest of Mt. Makiling, Luzon Is., Philippines using the Sorensen's coefficient of community and Simpson's index of dominance. On the basis of similarity of community structure and species composition based on Sorensen's coefficient of community, there were nine (9) zones generated that consisted of Zone 1 at 500 m a.s.l., Zone 2 at 520-560 m a.s.l., Zone 3 at 580 m a.s.l., Zone 4 at 600-620 m a.s.l., Zone 5 at 640 m a.s.l., Zone 6 at 660-680 m a.s.l., Zone 7 at 700 m a.s.l., Zone 8 at 720-740 m a.s.l. and Zone 9 at 760- 900 m a.s.l. The zonations were further narrowed down to four groups using Simpson's index of dominance. The groups were classified on the basis of increasing altitude and the dominant species in each zone. Zone 1 (500-620 m a.s.l.) consisted of Ctenitis dissecta-Bolbitis heteroclita-Dryopteris sparsa Zone, Zone 2 (640 m a.s.l.)consisted of Bolbitis heteroclita-Bolbitis rhizophylla-Asplenium cuneatum Zone, Zone 3 (660-680 m a.s.l.)consisted of Nephrolepis acutangula-Cyathea contaminans-Asplenium tenerum Zone and Zone 4 (700-900 m a.s.l.)consisted of Sphaerostephanos lobatus-Nephrolepis acutangula-Lomariopsis pteroides Zone. The different dominant species in zones 1,2,3 and 4 were Ctenitis dissecta, Bolbitis heteroclita, Nephrolepis acutangula and Sphaerostephanos lobatus, respectively.
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1 - DOST-Philippine Science High School-Main Campus, Biology Unit, Department of Natural Sciences, Agham Road, Diliman, Quezon City, 1101, Philippines
2 - University of the Philippines Los Baños, Plant Biology Division, Institute of Biological Sciences, Laguna, Philippines
Mt. Makiling, Philippines
Sorensen's coefficient of community
Simpson's index of dominance.
Presentation Type: Oral Paper:Papers for Sections
Location: Lake Michigan/Hilton
Date: Monday, July 9th, 2007
Time: 9:00 AM