Abstract
Lan-Kuu freshwater wetland of Auk SaThar in Mingin Township, Sagaing Region was investigated for its species composition, relative abundance, and diversity of aquatic macro-invertebrates from June 2020 to January 2021. This wetland has water throughout the year and is used by many local people for fishing and trapping birds. Thirty macro invertebrates’ species belonging to 28 genera, 19 families, 11 orders, 5 classes, and 3 Phyla were identified and recorded. These species belonged to the orders Hemiptera (23%), Coeleoptera and Odonata (14% each), Orthoptera, Architaenioglossa and Sorbeoconcha (10% each), Lepidoptera (7%), and Hymenoptera, Araneae, Decapoda, and Opithopora (3%). Among the collected specimens Dytiscus verticalis accounted for the highest number of individuals while the least number of individuals were Arocatus rusticus. Average relative abundance indicated 9 species as ‘uncommon’, 14 species as ‘common’ and 7 species as very common in the studied wetland. According to the Shannon index, the diversity of macro-invertebrates recorded in Lan-Kuu freshwater wetland, Myanmar, was high, (2.746-3.016), and so was the evenness (0.888-0.956).
Highlights
Invertebrates are common throughout the water columns, on plants, litter, and rocks and in the soil
As with other animals in wetlands, wetland invertebrates need to adapt to low level or even periodic absence of oxygen in the water column and especially in the soil (Chapman et al, 2004)
Species Composition A total number of 30 species of 27 genera belonging to nineteen families and eleven orders under five classes of three phyla of freshwater invertebrates were recorded in Lan-Kuu wetland
Summary
Invertebrates are common throughout the water columns (plankton and nekton), on plants, litter, and rocks (periphyton) and in the soil (benthos). As with other animals in wetlands, wetland invertebrates need to adapt to low level or even periodic absence of oxygen in the water column and especially in the soil (Chapman et al, 2004). Freshwater bodies contain diverse habitats which support myriads species of both plants and animals and support important ecosystem services for human wellbeing (Adeogun, 2011). Aquatic environments are important habitats for a multitude of species, complex food web and the predominant source of the essential requisite for all life in the biosphere. The aquatic habitats are the most important ecosystem in the whole of the biosphere, which are greatly influenced by water pollution (Gunnarsson et al, 2004). Kay Thi Moe, (2019) recorded that species composition, occurrence, and relative
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