Laboratory of Behavioral Ecology and Evolution, School of Biological Sciences, Seoul National University, Seoul, 08826, Republic of Korea.
Department of Life Sciences and Division of EcoScience, Ewha Womans University, Seoul, 03760, Republic of Korea.
Sci Rep. 2018 May 23;8(1):8049. doi: 10.1038/s41598-018-26222-w.
When natural wetlands are destroyed, many anuran species are forced to breed in alternative habitats such as rice paddies. We conducted field surveys for the endangered Dryophytes suweonensis and the numerous D. japonicus, from the beginning of the breeding season until two weeks after its peak. We recorded the presence, number of individuals and calling indices for each species. We hypothesized that D. japonicus would start breeding earlier than D. suweonensis, which would have originally been breeding solely in floodplains. The results of our analyses demonstrate that the rice cultivation phase was the most important factor in predicting the calling activities of both species. Furthermore, peak calling activities of both species matched the optimal hydroperiod in rice paddies. In addition, D. japonicus breeding behaviour was influenced by environmental variables such as temperature, whereas D. suweonensis seemed to require the planting of rice seedlings to initiate breeding. Therefore, as both Dryophytes species' breeding activities are influenced by agro-environmental variables, this study highlights the importance of also preserving anthropogenically modified landscapes for the conservation of species.
当天然湿地遭到破坏时，许多蛙类被迫在稻田等替代生境中繁殖。我们从繁殖季节开始到高峰期结束后的两周内，对濒危的苏威氏雨蛙和大量的日本雨蛙进行了实地调查。我们记录了每个物种的存在、个体数量和鸣叫指数。我们假设日本雨蛙的繁殖时间会早于原本仅在洪泛平原繁殖的苏威氏雨蛙。我们的分析结果表明，水稻种植阶段是预测两个物种鸣叫活动的最重要因素。此外，两个物种的鸣叫高峰期都与稻田的最佳水期相吻合。此外，日本雨蛙的繁殖行为受到温度等环境变量的影响，而苏威氏雨蛙似乎需要种植水稻幼苗才能开始繁殖。因此，由于两种雨蛙的繁殖活动都受到农业环境变量的影响，本研究强调了保护人为改造景观对于物种保护的重要性。
