Western Pacific Tropical Research Center, University of Guam, Mangilao, Guam, USA.
Plant Signal Behav. 2020;15(2):1716160. doi: 10.1080/15592324.2020.1716160. Epub 2020 Jan 27.
Carbon dioxide efflux () from the base of K.D. Hill stems was quantified in four locations containing healthy populations and in one location with populations threatened by non-native insect herbivores in order to determine the influence of reduced plant health on . Minimal variation of occurred among the four locations with healthy plants, and ranged from 1.68 to 1.79 µmol·m·s. The threatened populations were on the island of Guam, where recent invasions of non-native insects have caused epidemic plant mortality, and the was 0.59 µmol·m·s. This is the first known report of for any cycad species, and the values for the unique pachycaulous stem form fit in the lower half of the range of published for woody trees. The results illuminate the potential for using to screen populations to identify the individual trees with the greatest likelihood of surviving conservation measures.
为了确定植物健康状况下降对二氧化碳排放的影响，从基底部对健康种群的 4 个地点和受非本地昆虫食草动物威胁的 1 个地点的 K.D.希尔茎进行了量化。健康植物的四个地点之间的二氧化碳排放变化最小，范围为 1.68 至 1.79 μmol·m·s。受威胁的种群位于关岛，那里最近非本地昆虫的入侵导致了植物的大量死亡，二氧化碳排放量为 0.59 μmol·m·s。这是首次对任何苏铁物种进行的二氧化碳排放报告，独特的粗柱状茎形式的二氧化碳排放量值位于已发表的木质树木二氧化碳排放范围的下半部分。研究结果阐明了利用二氧化碳排放来筛选种群以识别最有可能通过保护措施存活的个体树木的潜力。
