Fragmentation

noun (uncountable; countable when referring to specific events)

/ˌfræɡ.mənˈteɪ.ʃən/

In ecology, habitat fragmentation is the process by which large, continuous areas of habitat are broken into smaller, isolated patches by human activities such as road construction, agriculture, or urban expansion. Fragmentation reduces effective population sizes, restricts gene flow, increases edge effects, and heightens vulnerability to local extinction — effects quantified by island biogeography theory (MacArthur and Wilson, 1967). India's linear infrastructure expansion — highways, railways, and powerlines — through forest corridors is a major driver of fragmentation affecting tiger, elephant, and leopard metapopulations.

✍️ Usage in a UPSC answer

The Supreme Court-constituted Central Empowered Committee flagged that highway widening projects in the Kanha-Pench corridor would cause irreversible habitat fragmentation, severing the last contiguous tiger movement corridor in central India.

Synonyms

habitat isolationlandscape fragmentationpatch isolationhabitat divisiondiscontinuation

Antonyms

connectivityhabitat continuitycorridor linkagedefragmentation

🌱 Word Family

fragment (noun/verb), fragmented (adjective), fragmentary (adjective), defragmentation (noun)

🔡 Root

Latin fragmentum = a piece broken off, from frangere = to break; -ation = process

📜 Etymology

From Latin fragmentum (a broken piece), derived from frangere (to break, shatter). The word entered English in the 17th century as a general term for breaking into fragments; its ecological application developed in the 1970s–1980s alongside island biogeography and conservation biology as a distinct discipline.

🧠 Memory Hook

FRAG (break) + MENT (piece) + ATION. Think of smashing a large mirror into fragments — each piece reflects less of the picture, and animals trapped in habitat fragments see less of their genetic future.

📝 Seen in UPSC Question Papers

Prelims 2012 — Biodiversity

Real UPSC previous-year questions whose text uses “Fragmentation” — proof this word earns its place on your list.

🌿 Environment & Ecology 📖 Seen in: Ecology Fundamentals — Ecosystems, Foo...

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