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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

* Corresponding author, E-mail: rungnapa_tag@cmru.ac.th

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Received 17 Apr 2022, Accepted 31 Oct 2022