A comparative vegetational analyses between natural and disturbed grasslands

Date of Publication

1997

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Biology

College

College of Science

Department/Unit

Biology

Abstract/Summary

Vegetation analyses in a natural grassland in Mt. Palay-palay, Cavite and in a disturbed grassland in Pulilan, Bulacan were conducted. A line intercept measuring 100 m in length by 5 m in width was laid out along the southeast orientation in the natural grassland and northeast orientation in the disturbed grassland. The species found in the natural grassland were: Saccharum spontaneum, Pennisetum polystachyum. Cardiospermum halicacabum and Chromolaena odorata. On the other hand the species found in the disturbed grassland were: Axonopus compressus, Amaranthus spinosus and Lindermia crustacea. The following ecological parameters were measured: density, relative density, dominance, relative dominance, frequency, relative frequency, coverage, relative coverage and importance value. In the natural grassland, the species Saccharum spontaneum had the highest density (40.8%), relative density (50.8%), dominance (17.24%), relative dominance (44.7%), frequency (100%), relative frequency (27.4%), coverage (.36), relative coverage (27.27%) and importance value (35.16%). In the disturbed grassland the species Axonopus compressus had the highest density (8.4%), relative density (38.5%), dominance (7.68%), relative dominance (55.7%), frequency (98%), relative frequency (35%), coverage (1.3%), relative coverage (64.3%), and importance value (46%). The species observed in the natural grassland were taller and the number of species was greater than that in the disturbed grassland.

Abstract Format

html

Language

English

Format

Print

Accession Number

TU07647

Shelf Location

Archives, The Learning Commons, 12F, Henry Sy Sr. Hall

Physical Description

43 leaves

Keywords

Grasslands; Vegetation boundaries; Plant communities

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