The microorganism number under the natural spruce fir forest was bigger than the secondary.

天然云冷杉林的微生物总量大于次生云冷杉林；

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The accumulation quantity of litter of Chinese fir forest and its undergrowth plant at different site indices and forest ages also existed obvious difference.

不同地位指数和不同林龄杉木及其林下植物的凋落物积累量也存在明显差异，杉木凋落物积累量随林龄的增大而增加。

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Using typical sampling method, the paper studies the composition and important value of plant species in subalpine spruce fir forest on Northern Slope of Changbai Mts.

采用典型抽样方法，对长白山北坡不同海拔高度带云冷杉林的植物种类组成及重要值进行了初步研究。

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And then move up into Ponderosa pines, then in upper elevations spruce and fir forest, and then finally to some sort of alpine tundra up at the top.

NPR: Warming Will Create Micro-Climates, Scientists Say

The open valley turns to a forest of tall fir trees, many hung with moss.

BBC: Hiking the Alpine Walserweg trail

It was a damp day and, after he had parked the van and set off down the forest track, even the noise of the Edinburgh-Glasgow motorway was muffled by thick, dark fir trees.

ECONOMIST: Robert Taylor