Article Details : |
| | Article Name : | | Biomonitoring of Wetland Using Macrophytes and
Macroinvertebrates | Author Name : | | D. M. BAJRACHARYA1, K. K. PANT, SURYA DHUNGANA | Publisher : | | Bridge Center | Article URL : | | | Abstract : | | Bio-monitoring is the use of biological responses to assess
changes in the environment. Biological monitoring is considered to
provide an integrated approach to assess water and overall
environmental quality. The ultimate objective of bio-monitoring in the
Rampur Ghol is to ensure that local resource users in the water sector
to apply biodiversity friendly management practices within their day
to day activities. In this research macro invertebrates are used to
classify the Rampur Ghol into different Water Quality Classes based
on Saprobic Water Quality Classification (SWQC) approach. Rampur
Ghol was selected as research site for biological monitoring, situated in
Chitwan district, Mangalpur VDC Ward No. 2. Macrophytes were
collected from both the aquatic habitat and buffer zone of the Rampur
Ghol in seasonal basis using fixed quadrate of 1×1m2
. Benthic macroinvertebrates were sampled by using bin sampler and grab sampler
and then analysed. During study period altogether 14 families
belonging to 10 orders of aquatic macro-invertebrate were found in dry
season and 18 families belonging to 12 orders of aquatic macro-invertebrates were found in rainy season. Accessing the Biotic Index of
macro-invertebrates, it was found that eight sites fall in water quality
class III and site 7 and site 10 were rated class II-III and class III-IV
respectively in dry season. Similarly, seven sites were rated water
quality class III and three sites were rated water quality class II-III in
rainy season. Study of the macrophytes in site 7, 8 and 10 concluded
that the macrophytes from sites 8 and 10 showed high degree of
organic pollution and showed the dominance of Pistia stratiotes
throughout the study, which is considered to be indicator of organic
pollution. High anthropogenic activities show fluctuation of water
quality in Rampur Ghol. It can be concluded that humans are the key
factor for degrading the Ghol. | Keywords : | | Bio-monitoring, macroinvertebrates, Rampur Ghol,
Saprobic Water Quality Classification Approach, Biotic Index,
macrophytes, |
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