wallace's line
LowTechnical, Academic
Definition
Meaning
A faunal boundary line drawn in 1859 by the British naturalist Alfred Russel Wallace, separating the ecozones of Asia and Wallacea (a transitional zone between Asia and Australia). It runs through the Indonesian Archipelago.
A biogeographical demarcation illustrating the dramatic difference in species between regions due to deep-water channels that acted as barriers to animal migration, even during periods of low sea level.
Linguistics
Semantic Notes
Proper noun, always capitalized. Refers specifically to the line defined by Wallace. Concept is foundational in biogeography and evolutionary biology.
Dialectal Variation
British vs American Usage
Differences
No significant differences in usage or spelling.
Connotations
Identical academic/scientific connotations.
Frequency
Equally low frequency in both dialects, confined to specialized fields.
Vocabulary
Collocations
Grammar
Valency Patterns
[Subject] lies east/west of Wallace's Line.[Concept] explains the distribution across Wallace's Line.The fauna changes dramatically at Wallace's Line.Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Academic
Used in biogeography, biology, geology, and environmental science to discuss species distribution and evolutionary history.
Everyday
Virtually never used in everyday conversation.
Technical
Core term in biogeography; denotes a specific historical and geographical concept.
Examples
By CEFR Level
- Wallace's Line is a famous boundary in science.
- The islands east of Wallace's Line have very different wildlife compared to those to the west.
- Alfred Russel Wallace postulated that the deep-water channel represented by Wallace's Line had persistently prevented the migration of terrestrial mammals, thereby shaping the distinct fauna of Australasia.
Learning
Memory Aids
Mnemonic
Imagine a LINE drawn by a man named WALLACE, WALLing off the ASIAN animals from the Australian ones.
Conceptual Metaphor
A LINE is a BOUNDARY (separating distinct biological worlds).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct translation as 'линия Уоллеса' without context, as it may be misinterpreted as a physical line on a map rather than a scientific concept.
- The possessive 's is crucial for accuracy; 'Линия Уоллеса' is the standard term.
Common Mistakes
- Incorrect: 'Wallaces Line' (missing apostrophe).
- Incorrect: 'wallace's line' (not capitalised).
- Incorrect: Using it to describe any geographical border, rather than this specific biogeographical one.
Practice
Quiz
What does Wallace's Line primarily separate?
FAQ
Frequently Asked Questions
It was identified and described by the British naturalist Alfred Russel Wallace in the mid-19th century.
No, it is a conceptual boundary drawn on maps based on the distribution of species, not a visible physical feature.
It provides key evidence for the role of geographic isolation in driving evolution and speciation.
Yes, other biogeographical lines like Weber's Line and Lydekker's Line further refine the transition zone between Asia and Australia.