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19 July 2026

Ecological role of invasive plants in Assam

The study provides nuanced ecological context regarding invasive species management in protected areas, which is useful for framing arguments in environmental conservation answers but does not constitute a major policy or landmark report.

1 min read Day 2 of 3 2 questions 2 prelims

Notes

  • Study conducted in Raimona National Park, Assam (422 sq. km), between 2022 and 2025 by Bodoland University.
  • Research documented 220 butterfly species, 56 larval host plants, and 41 nectar plants.
  • Invasive species Lantana camara, Chromolaena odorata, and Ziziphus mauritiana act as critical nectar sources for butterflies.
  • Lantana camara attracts over 30 butterfly species (April–October); Chromolaena odorata supports 24 species (December–February).
  • Invasive plants provide nectar during periods of native wildflower scarcity, sustaining butterfly populations.
  • Lantana camara's multi-coloured inflorescences and continuous nectar production serve as strong visual cues for foraging.
  • Several invasive species (e.g., Ricinus communis, Mikania micrantha, Ageratum conyzoides) also function as larval host plants.
  • Researchers suggest maintaining small, managed patches of these invasive species in protected landscapes to ensure continuous nectar supply.

Part of a longer story

This is day 2 of 3 in Butterfly diversity documentation in Assam, which has been running since 5 July 2026. Reading it whole is usually worth more than reading today alone — the exam asks how something developed.

Questions

  1. The ecological role of invasive plant species is often viewed through the lens of biodiversity loss; however, recent studies suggest a more nuanced interaction with native fauna. Discuss in the context of butterfly conservation in protected areas. 150 words
    Attempt this — 150 words in 8 min
    0 / 150 words 8:00
  2. Exotic invasive species are typically excluded from forest management practices due to their negative impact on native ecosystems. Critically examine whether a shift toward 'managed patches' of invasive flora could serve as a pragmatic strategy for biodiversity conservation in fragmented landscapes. 250 words
    Attempt this — 250 words in 11 min
    0 / 250 words 11:00

Prelims

  1. Which of the following invasive plant species is noted for its multi-coloured inflorescences that serve as visual cues for foraging butterflies?

  2. In the context of butterfly ecology, what is the primary distinction between larval host plants and nectar plants?

Syllabus

Topics

Sources

250words.in · https://250words.in/daily/2026-07-19/ecological-role-of-invasive-plants-in-assam