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Investigating the factors influencing trap capture of bark and ambrosia beetles using long-term trapping data in a cool temperate forest in central Japan
Journal of Forest Research ( IF 1.3 ) Pub Date : 2020-05-18 , DOI: 10.1080/13416979.2020.1762288
Naoto Kamata 1 , Sunisa Sanguansub 2 , Roger A. Beaver 3 , Toshihiro Saito 4 , Toshihide Hirao 4
Affiliation  

From 1994 to 2003, bark and ambrosia beetles were captured from April to November at 12 sites in the University of Tokyo Chichibu Forest, central Japan, using flight-barrier traps with alpha-pinene and ethanol as a lure. Additional trapping was conducted between July 2013 and November 2014 at the same sites using Lindgren’s funnel traps with ethanol. Factors influencing trap captures were investigated, accounting especially for the indirect influence of sika deer on beetle populations due to induced tree mortality. Owing to incomplete data collection in 2013, trap captures of August and after August (“AUG” for 12 years) were analyzed separately from those of the whole season (“ALL” for 11 years). Trap captures in 2013–2014 were greater than those in 1994–2003. There was also an increase in the number of species across both periods, which was more conspicuous in “AUG”. Seventeen indicator species were found in 2013–2014, and only two in 1994–2003. This could be partially explained by the difference in the lure used. A sudden population increase in 25 species was observed between the average over 1994–2003 and 2013–2014. Increasing trends during the 1994–2003 were also recognized in 13 species, with a sudden increase in 6 species in the last few years of the period. These coincided with increases in sika deer populations across both periods. An increase in tree mortality caused by increases in the deer population is likely the cause of the increase in bark and ambrosia beetles.



中文翻译:

使用日本中部凉爽温带森林中的长期捕获数据调查影响树皮和失忆甲虫捕获的因素

从1994年到2003年,4月至11月,在日本中部东京秩父森林大学的12个地点使用了以α-pine烯和乙醇为诱饵的飞行障碍物诱捕器捕获了树皮和失落的甲虫。在2013年7月至2014年11月之间,使用Lindgren的乙醇漏斗在相同的地点进行了额外的捕集。调查了影响诱捕的因素,尤其是考虑到由于诱导的树木死亡率,梅花鹿对甲虫种群的间接影响。由于2013年的数据收集不完整,因此与整个季节(“ ALL”为11年)分别对8月和8月之后(“ AUG”为12年)的陷阱捕获进行了分析。2013-2014年的陷阱捕获量高于1994-2003年的捕获量。在这两个时期,物种的数量也有所增加,在“ AUG”中更明显。在2013–2014年发现了17种指示剂物种,而在1994–2003年发现了仅两种。可以通过使用的诱饵差异部分地解释这一点。在1994–2003年至2013–2014年之间,平均25种物种的种群突然增加。在1994年至2003年期间,也发现了13种物种的增加趋势,在此期间的最后几年中,有6种物种突然增加。这与两个时期梅花鹿种群的增加同时发生。由鹿种群增加引起的树木死亡率增加很可能是树皮和佳肴甲虫增加的原因。在1994–2003年至2013–2014年之间,平均25种物种的种群突然增加。在1994年至2003年期间,也发现了13种物种的增加趋势,在此期间的最后几年中,有6种物种突然增加。这与两个时期梅花鹿种群的增加同时发生。鹿群数量增加引起的树木死亡率增加可能是树皮和佳肴甲虫数量增加的原因。在1994–2003年至2013–2014年之间,平均25种物种的种群突然增加。在1994年至2003年期间,也发现了13种物种的增加趋势,在此期间的最后几年中,有6种物种突然增加。这与两个时期梅花鹿种群的增加同时发生。鹿群数量增加引起的树木死亡率增加可能是树皮和佳肴甲虫数量增加的原因。

更新日期:2020-07-24
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