Relative abundance, density, and diversity of macrobenthic invertebrates in Batlag and Daranak rivers in Tanay, Rizal
Date of Publication
1993
Document Type
Bachelor's Thesis
Degree Name
Bachelor of Science in Biology
College
College of Science
Department/Unit
Biology
Abstract/Summary
This study assessed the present condition of Batlag and Daranak Rivers using macrobenthic invertebrates as indicators of water quality. Five stations were sampled in May, June and November of 1992 using a one square foot Surber sampler (Mundle, 1971). Physico-chemical factors like river width, depth, velocity of flow, volume of flow, substrate composition, temperature, alkalinity, water hardness, and amount of dissolved oxygen were measured to investigate its effect on the density and diversity of macrobenthic invertebrates. Diversity was investigated using Wilhm and Dorris diversity index (1968).Findings show that density of macrobenthic invertebrates significantly increased from May to June. Insects nymphs and gastropods were found to be the most dominant organisms. Substrate composition was observed to play a vital role in the kind and number of organisms which inhabits the stream ecosystem. The larger the sediments, the greater is the surface area for the attachment of insect nymphs and gastropods. In November, density generally decreased. Diversity indices showed that the area studied was moderately polluted.
Abstract Format
html
Language
English
Format
Accession Number
TU06053
Shelf Location
Archives, The Learning Commons, 12F, Henry Sy Sr. Hall
Physical Description
144 leaves ; Computer print-out.
Keywords
Marine invertebrates; Water--Analysis; Rivers--Philippines--Rizal Province; Invertebrates
Recommended Citation
Benigno, M. A., Luancing, J. F., & Viola, E. V. (1993). Relative abundance, density, and diversity of macrobenthic invertebrates in Batlag and Daranak rivers in Tanay, Rizal. Retrieved from https://animorepository.dlsu.edu.ph/etd_bachelors/8273
