총 616페이지

3. 원 문
Lee et al. 2021
The role of anthropogenic disturbance and invasion of yellow crazy ant in a recent decline of land
crab population
The yellow crazy ant, Anoplolepis gracilipes was first reported in Kenting National Park, Taiwan, in
the 2000s, raising the concern of this invasive ant’s potential effects on the native land crab
populations. We investigated the distribution and abundance of A. gracilipes and its adverse effect
on the land crab populations at four land crab hotspots within the park. Our survey results
indicated that A. gracilipes was widespread and abundant at three of the study sites
(Hsiangchiaowan, Shada, and Natural Spring), while the distribution was much more confined at the
fourth site (Houwasn). Land crab populations experienced a notable decline at all the study sites
except Houwan, indicating an inverse relationship between the population of land crabs and
distribution/abundance of A. gracilipes. Combining the results of visual observations, the decline of
land crab populations can be attributed, at least partially, to direct attacks by A. gracilipes on land
crabs in their natural habitat and during the breeding migration season. Generalized additive model
showed that worker abundance of this ant is associated with human disturbance levels, suggesting
that anthropogenic disturbance may have contributed to the decline in land crab populations via
promoting the abundance of A. gracilipes.
Keywords: Social insects, particularly ants,
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