How does the arthropod-plant system respond to abrupt and gradual increases in atmospheric CO2?

摘要

cqvip:Global warming caused by elevated carbon dioxide(CO2)is a major environmental and policy issue.The current global average temperature has been elevated by 1℃since the industrial revolution,and it is likely to reach a temperature increase of 1.5℃between 2030 and 2052(IPCC 2018).Human-caused emission of CO2 is responsible for the greenhouse effect and the atmospheric CO2 concentration is higher now than at any other time in the past 500000 years,and it continues to rise(Lüthi et al.2008).Impacts of arthropod-plant interactions on carbon dynamics and the global climate are important but often ignored.For example,outbreaks of the mountain pine beetle,Dendroctonus ponderosae,in British Columbia during 2000-2020 will cause the release of an estimated 270 Mt carbon and convert the forest from a small carbon sink to a large carbon source(Kurz et al.2008).The annual carbon release due to outbreaks of this beetle is almost equivalent to the annual carbon emission from all forest fires occurring in Canada over 1959-1999(Kurz et al.2008).