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Diversity of Naturally Colonized True Mangroves and Mangrove Associates Along the Bank of Champa Canal, West Bengal, India, with Emphasis on Different Environmental Factors

Avik Bhanja1 , Pijush Payra2 * , Indrajit Sau3 , Sandip Makur4 , Dishani Biswas5 , Tapas Bhunia6 and Nibedita Sinha7

1 Department of Biological Sciences (Fisheries Science), Midnapore City College, Vidyasagar University, Midnapore, West Bengal India

2 Department of Fisheries Science, Ramnagar College, Vidyasagar University, Depal, India

3 Department of Botany and Forestry, Vidyasagar University, Midnapore, West Bengal India

4 Department of Remote Sensing and GIS, Vidyasagar University, Midnapore, West Bengal India

5 Department of Geography, Raja Narendra Lal Khan Women's College (Autonomous), Midnapore, West Bengal India

6 Department of Aquaculture, Sanjeev Agrawal Global Educational (SAGE) University, Bhopal, Madhya Pradesh India

7 Department of Aquaculture Management, Ramnagar College, Vidyasagar University, Depal, India

Corresponding author Email: pijushpayra@gmail.com

DOI: http://dx.doi.org/10.12944/CWE.20.2.20

Mangroves have great ecological value because of their unique intertidal ecosystems and increased sensitivity to environmental changes. This paper examines the natural colonisation and diversity of true mangroves and their associated species along the Champa Canal (Negua Diversion Canal) in the Purba Medinipur area of West Bengal, India. The study area was categorised into three distinct zones, based on salinity gradients and tidal influences: Zone I is characterised by marine dominance; Zone II represents a transitional phase; and Zone III is influenced by freshwater. Fieldwork encompassing species identification, water and soil analysis, and seasonal tidal data collection documented 10 true mangrove species across 8 genera and 6 families, including 35 mangrove associates from 31 taxa and 21 families between December 2023 and November 2024. Zone I exhibited the highest levels of salinity and species diversity, while Zone III displayed reduced variability due to the predominance of freshwater and the absence of tidal activity. In addition to soil characteristics such as electrical conductivity, pH, and nutrient levels, the water parameters exhibited significant seasonal and geographical variation. These include salinity (ranging from 2.17 to 18.9 ppt), pH (between 6.3 and 8.9), dissolved oxygen (from 3.48 to 6.5 ppm), and biochemical oxygen demand (ranging from 1.73 to 2.94 ppm). Notably, eleven non-estuarine mangrove species and six invasive alien plant species were documented; numerous invasive species rapidly occupied disturbed regions. The distribution of mangroves in the study area was closely associated with variations in environmental conditions. This comprehensive ecological study offers crucial baseline data necessary for the future preservation, monitoring, and management of mangroves in transitional estuaries.

Champa Canal; Mangrove associates; Mangrove diversity; Soil quality; Tidal variance; True Mangroves; Water quality

Copy the following to cite this article:

Bhanja A, Payra P, Sau I, Makur S, Biswas D, Bhunia T, Sinha N. Diversity of Naturally Colonized True Mangroves and Mangrove Associates Along the Bank of Champa Canal, West Bengal, India, with Emphasis on Different Environmental Factors. Curr World Environ 2025;20(2). DOI:http://dx.doi.org/10.12944/CWE.20.2.20

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Bhanja A, Payra P, Sau I, Makur S, Biswas D, Bhunia T, Sinha N. Diversity of Naturally Colonized True Mangroves and Mangrove Associates Along the Bank of Champa Canal, West Bengal, India, with Emphasis on Different Environmental Factors. Curr World Environ 2025;20(2).

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