海滩松上的树皮甲虫会有选择性地寄居在松树上,避开年轻健康的松树。
The narrow, towering lodgepole pine trees that populate North America's western forests may disappear in the coming decades due to climate change and attacking beetles, a study said Monday.狭长的,树尖儿直耸入天的海滩松生长在美国西岸丛林中。星期一,一项研究表明,海滩松有可能在未来数十年中,因为气候变化和病虫害而灭绝。