Research articles
ScienceAsia 49 (2023): 297-304 |doi:
10.2306/scienceasia1513-1874.2023.013
The response of aquatic insect assemblages to diverse
land-use types and environmental factors in Mae Ram River
basin, Thailand.
Rungnapa Taguna,b,*, Baicha Wongtuib,c, Tatporn Kunpradida,b
ABSTRACT: We assessed the response of aquatic assemblages to 3 types of land uses (horticulture, forest, and
rural/urban areas) and the relationship between physicochemical and environmental parameters of the Mae Ram River
basin. The physicochemical and biological variables were significantly varied among the types of land uses. Diversity
significantly declined in both horticultural and rural/urban areas. Traits were satisfactorily explained by environmental
variables across land-use gradients. The main drivers of trait variations were divided into 2 groups: ammonia and nitrate
at upstream horticultural sites and total dissolved solids, orthophosphate, and conductivity in downstream rural/urban
areas which also influenced Caenidae distribution. Functional feeding groups (FFGs) did not conform completely to
the river continuum concept. This could be related to the degradation of the basin resulting from human activities
from upstream to downstream. Our results indicate that land-use type can help predict aquatic ecosystem health and
anthropogenic support of a diverse community of aquatic insects in the Mae Ram River basin.
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| a |
Department of Biology, Chiang Mai Rajabhat University, Chiang Mai 50300 Thailand |
| b |
Centre of Excellence for Biodiversity Research and Implementation for Community, Chiang Mai Rajabhat University,
Chiang Mai 50300 Thailand |
| c |
Department of Geography, Chiang Mai Rajabhat University, Chiang Mai 50300 Thailand
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* Corresponding author, E-mail: rungnapa_tag@cmru.ac.th
Received 17 Apr 2022, Accepted 31 Oct 2022
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