A recent survey documented only 65% of historically known Odonata species in the Western Ghats. Discuss the significance of such biodiversity gaps and suggest measures to strengthen freshwater biodiversity monitoring in India.

A 2021–2023 survey across 144 sites in five Western Ghats states recorded 143 Odonata species — 76 dragonflies and 67 damselflies — only about 65% of the ~220 historically known, leaving a 35% shortfall [1]. In a UNESCO World Heritage landscape recognised as one of the world's eight "hottest" biodiversity hotspots [2], such a gap is both an ecological warning and a governance failure.

Ecological significance

• Odonata are obligate freshwater insects with aquatic larvae, making them bioindicators; globally 16% of the 6,016 assessed species face extinction as wetlands shrink [3].
• Their absence signals freshwater degradation — stream channelisation, pollution, hydropower and land-use change — before larger vertebrates show stress.
• Endemism risk is acute: 40 recorded species are Western Ghats endemics, Kerala alone accounting for 33 [1].

Knowledge and governance significance

• Most Ghats Odonata remain "Data Deficient" or "Not Evaluated" — nearly 30% of assessed odonates worldwide are Data Deficient [3] — so absence of data is misread as absence of threat, weakening Environmental Impact Assessments.
• Weak species-level data undermines India's reporting under the Kunming–Montreal Global Biodiversity Framework, whose Target 3 commits to protecting 30% of land and inland waters by 2030 [4].
• Conservation across six states makes federal coordination and the pending Western Ghats ESA notification [5] harder to ground in evidence.

Way forward

• A national Odonata/freshwater invertebrate monitoring programme under ZSI, building on its expanding faunal database and annual survey network [6].
• Institutionalise citizen science with expert validation, as the Ghats survey demonstrated [1].
• Empower Biodiversity Management Committees under the Biological Diversity Act, 2002 to maintain People's Biodiversity Registers for local water bodies [7].
• Make invertebrate baselines mandatory in EIA for hydropower and tourism projects.

Biodiversity gaps of this scale are a monitoring deficit before they are an extinction verdict. Converting the Western Ghats' bioindicator evidence into periodic, funded, standardised assessments would let India meet its 30×30 obligations while honouring the constitutional duty under Article 48A to protect forests and wildlife.