Abstract

The study was to investigate species composition and biological water quality of benthic macroinvertebrates among localities at Gwangseok stream, Jinhae city in Korea. The identified benthic macroinvertebrates were 781 individuals belonged to 19 species, 14 families, 8 orders, 5 classes and 3 phyla. The value of dominance index (DI) was varied from 0.184 (St. C) to 0.333 (St. A) with a mean of 0.235. DI was significantly different among the four regions. Beck-Tsuda's Biotic Index (BI) was varied from 7 (St. D) to 20 (St. C) with a mean of 14. Total ecological score of benthic macroinvertebrate community (TESB) was varied from 12 (St. D) to 38 (St. B) with a mean of 26.3. Average ecological score of benthic macroinvertebrate community (AESB) was varied from 1.714 (St. D) to 1.900 (St. B) with a mean of 1.821. Benthic macroinvertebrate index (BMI) ) was varied from 22.354 (St. A) to 26.474 (St. D) with a mean of 39.756. Shannon-Weaver index (H´) for mammals at the upper regions (St. A and St. B) was higher than those of low regions (St. C and St. D). Berger-Parker’s index (BPI) was varied from 0.218 (St.. C) to 0.346 (St. A). Richness (R1) was different from each other and R2 was not shown significant differences (p < 0.05). Evenness indices (E1-E5) for four stations were different from each other, however there were not shown significant differences (p < 0.05).

Highlights

  • Streams typically derive most of their water from precipitation in the form of rain and snow

  • C were βmesosaprobic according to Staub et al [9]

  • Estimators for water quality condition on the number of species observed at a specific period (Summer and Fall) and estimate how many species in that subset are present at a different time (Spring and Winter)

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Summary

INTRODUCTION

Streams typically derive most of their water from precipitation in the form of rain and snow. Streams are important as conduits in the water cycle, fascinating and complex ecosystems on Earth. Associations (biota typical of wetlands, forests, grasslands, estuaries, and so forth) with geography and climate known as biomes, with ecosystems and ecoregions being smaller divisions within biomes [1]. Macroinvertebrates presents a state-of-the-art look at the use of benthic macroinvertebrates (aquatic insects, molluscs, crustaceans, and worms) in the biological assessment of water quality in lakes and streams [5]. Many people experienced what is at stake in the protection of water quality and the diversity of organism in a stream are not important elements such as invisible benthic macroinvertebrates. I used some estimators that should be useful for studying spatial and temporal changes in benthic macroinvertebrate communities

Studied regions
Diversity indices
II III IV-V
RESULTS
DISCUSSION
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