Kwon Tae-Sung
Forest Insect Pests and Diseases Division, National Institute of Forest Science, 57 Hoegi-ro, Dongdaemun-gu, Seoul 130-712, Republic of Korea.
J Therm Biol. 2018 Feb;72:59-66. doi: 10.1016/j.jtherbio.2017.11.015. Epub 2017 Nov 28.
Living organisms have been moving rapidly toward their favorable thermal regions as climate warms. Their competitive interactions will change significantly as a result of changes in distribution, abundance, and species composition. This study examines the relationship of competition intensity (frequency of competitive interactions) with temperature and the influence of competition on the occurrence of ant species. Competition between ants was surveyed at six different temperature sites using baits and the abundance of ants was surveyed using pitfall traps. The intensity of interspecific competition (abundance-corrected bait species displacement) was high at intermediate temperature sites (unimodal). Ant species are hierarchically organized in behavioral dominance. Two low-temperature ant species had decreased in the rank of behavioral dominance at warmer temperature sites because of the abundance of dominant intermediate temperature ant species. Ant species co-occurred randomly at the local scale. However, they were segregated at regional scale because of environmental filtering (temperature). Ant competition did not influence the occurrence of ant species at local or regional scale. These results suggest that the influence of changes in interspecific competition because of climate warming might not be great for ants in temperate regions.
随着气候变暖，生物正迅速向其适宜的热区迁移。由于分布、丰度和物种组成的变化，它们之间的竞争相互作用将发生显著改变。本研究考察了竞争强度（竞争相互作用的频率）与温度的关系以及竞争对蚂蚁物种出现的影响。使用诱饵在六个不同温度的地点调查蚂蚁之间的竞争，并使用陷阱诱捕器调查蚂蚁的丰度。种间竞争强度（经丰度校正的诱饵物种替代）在中等温度地点较高（呈单峰分布）。蚂蚁物种在行为优势方面呈等级组织。由于优势中等温度蚂蚁物种的丰度，两种低温蚂蚁物种在较温暖温度地点的行为优势等级有所下降。蚂蚁物种在局部尺度上随机共存。然而，由于环境过滤（温度），它们在区域尺度上是隔离的。蚂蚁竞争在局部或区域尺度上并未影响蚂蚁物种的出现。这些结果表明，气候变暖导致的种间竞争变化对温带地区的蚂蚁可能影响不大。
