Development of a macroinvertebrate-based Nepal Lake Biotic Index (NLBI): an applied method for assessing the ecological quality of lakes and reservoirs in Nepal

Shah, Ram Devi Tachamo; Shah, Deep; Nesemann, Hasko

doi:10.1504/ijhst.2011.040744

Cited by 12 publications

(8 citation statements)

References 22 publications

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“…Therefore, the significant differences in the percentages of EPT and WL abundance among the three zones are apparent and are similar to those from other ecological studies (e.g. Shah et al 2011). The overall trend of reduced taxa richness and a shift from sensitive to tolerant taxa is an indication of multiple stressors (Norris and Georges 1993).…”

Section: Discussionsupporting

confidence: 85%

Evaluation of benthic macroinvertebrate assemblage for disturbance zonation in urban rivers using multivariate analysis: Implications for river management

Shah¹,

Shah²

2013

J Earth Syst Sci

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River pollution has tremendously increased in the major cities of South Asia, where the rivers have become a repository for domestic, agricultural, municipal and industrial wastes. This study presents the evaluation of benthic macroinvertebrate assemblage as a means of assessing ecological status, determining different disturbance zones and identifying environmental variables and stressors that deteriorate the river ecosystem. In total, 20 sites in 36-km stretch of the main stem of the Bagmati River and 7 sites on its tributaries were selected for sampling in the post-monsoon and pre-monsoon seasons during the time period 2008-2010. The Ganga River System Biotic Score (GRSbios) index was applied to determine the ecological status. The ecological status of the different Bagmati River stretches ranged from reference (Class 1) to extremely polluted (Class 5). We identified three types of disturbance zones along the river, ranging from minimally polluted to extremely polluted. A river corridor survey was conducted to identify any river stressing factors, revealing a sharp deterioration of the river from upstream to downstream with increasing concentrations of chloride and ortho-phosphate phosphorus. Effluents and Activities and Facilities were found to be the major stressing factors to the river ecosystem. The information gained should help water managers find the most time-efficient and cost-effective measures to address river degradation.

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Section: Discussionsupporting

confidence: 85%

Evaluation of benthic macroinvertebrate assemblage for disturbance zonation in urban rivers using multivariate analysis: Implications for river management

Shah¹,

Shah²

2013

J Earth Syst Sci

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“…Spearman's rho correlation test was used to see the association between macro-invertebrate diversity, evenness and richness with physiochemical parameters. The water quality at each sampling site was assessed using Nepal Lake Biotic Index (Shah et al, 2011) which is computed as:…”

Section: Discussionmentioning

confidence: 99%

Macro-invertebrate Diversity and its Relationship with Environmental Variables in Adha Lake between Monsoon and Post-monsoon Seasons

Lhundup¹,

Forests²,

Dlorji³

2018

BJNRD

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Lentic water bodies are amongst the most threatened wetland habitat types as anthropogenic disturbances have significantly influenced the structure and function of aquatic ecosystems. This study compared the seasonal variations of macro-invertebrate diversity and analysed the physiochemical parameters to study the influence of surrounding land use on the lentic ecosystem of Adha Lake. Macroinvertebrate abundance in the lake was used as an indicator to assess the effect of surrounding land use. The lake was categorised into four major zones namely agriculture zone, forest east zone, catchment zone, and forest west zone. Sampling was carried out along the littoral zone of the lake. Physiochemical variables were collected for both the seasons. Chironomidae and Baetidae families were the most dominant macro-invertebrates in the lake. The least families encountered were Acrididae, Aeshnidae, Tabanidae, Hydrophilidae, and Libellulidae during monsoon season, and Simuliidae and Culicidae for post-monsoon season. There was no significant difference in Shannon Wiener's Diversity Index for monsoon and post-monsoon seasons, p > .05. pH, salinity, conductivity, total dissolved solid, and water temperature had negative correlation with diversity and richness; however, total dissolved solid, water temperature, and pH had positive association with taxon evenness. The HKH-bios index and NHBL index indicated that the lake is polluted which could be attributed to discharge from the paddy fields. Restoration and protection of Adha Lake as White-bellied heron's habitat may need significant conservation and advocacy measures.

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“…ASPT score = total of BMWP score / total number of families represented; >6 clean water, 5-6 doubtful quality, 4-5 probable moderate pollution, <4 probable severe pollution (Mandaville, 2002). Lake water quality class and its degree of pollution: 0-1.99 bad (extremely); 2-3.99 poor (heavily); 4-4.90 fair (moderately); 4.91-6.09 good (slightly); 6.10-10 high (none to minimal) (Shah et al, 2011). pH (5.8-6.4), FCO 2 , EC, and TA values were found lower than in UP. Similar low values were also recorded in one wetland and oxbow lake of Cachar District (Laskar and Gupta, 2013;Gupta and Devi, 2014).…”

Section: Discussionmentioning

confidence: 99%

“…Biological monitoring working party (BMWP) scores and average score per taxon (ASPT) were analyzed following Mandaville (2002). The Nepal Lake Biotic Index (NLBI) was analyzed following Shah et al (2011). …”

Section: Methodsmentioning

confidence: 99%

A comparative study of the aquatic insect diversity of two ponds locatedin Cachar District, Assam, India

Dalal¹,

Gupta²

2016

Turk J Zool

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Ponds play a vital role in the conservation of aquatic biodiversity at the local level apart from other lakes and rivers. A comparative study was carried out on the aquatic insect diversity of two different ponds, one in an urban area (urban pond, UP) and another in a rural area (Jalinga pond, JP). Two seasonal collections (postmonsoon and winter) were made to check the pollution status of the two ponds based on the aquatic insect community and physicochemical properties of water. Consequently, 29 species, 17 families, and 5 orders of aquatic insects from UP and 17 species, 8 families, and 3 orders from JP were recorded. Aphelonecta sp., Cloeon sp., and Micronecta sp. were the eudominant species recorded. According to the Shannon (H') index, UP was more diverse than JP. Family level biotic indices and scores further proved the better water quality of UP than of JP. Hence, it can be said that urban ponds have an important role to play in biodiversity conservation.

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Development of a macroinvertebrate-based Nepal Lake Biotic Index (NLBI): an applied method for assessing the ecological quality of lakes and reservoirs in Nepal

Cited by 12 publications

References 22 publications

Evaluation of benthic macroinvertebrate assemblage for disturbance zonation in urban rivers using multivariate analysis: Implications for river management

Evaluation of benthic macroinvertebrate assemblage for disturbance zonation in urban rivers using multivariate analysis: Implications for river management

Macro-invertebrate Diversity and its Relationship with Environmental Variables in Adha Lake between Monsoon and Post-monsoon Seasons

A comparative study of the aquatic insect diversity of two ponds locatedin Cachar District, Assam, India

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