Altitudinal zonation of Pterophytes of the midmountain forest of Mount Makiling, Luzon Island, Philippines

Date

4-2003

Degree

Bachelor of Science in Biology

Major Course

Major in Systematics

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Danielo B. Tolentino

Abstract

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 five hundred meters above sea level (500 masl), Zone 2 (520 masl-560 masl), Zone 3 (580 masl), Zone 4 (600 masl-620 masl), Zone 5 (640 masl), Zone 6 (660 mast-680 masl), Zone 7 (700 masl), Zone 8 (720 masl- 740 masl), and Zone 9 (760 masl-900 masl). 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, i.e., Zone 1 at 500 mu] to 620 masl which consisted of Ctenitis dissecta- Bolbitis heteroclita-Dryopteris sparsa Zone, Zone 2 at 640 masl which consisted of Bolbitis heteroclita-Bolbitis rhizophylla- Asplenium cuneatum Zone, Zone 3 at 660 masl to 680 masl which consisted Nephrolepis acutangula-Cyathea contaminans-Asplenium tenerum Zone, and Zone 4 at 700 masl to 900 masl which 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.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Document Type

Thesis

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