The first proposes the extension and systematisation of surveillance sites to monitor forest decline.

第一项决议建议，扩建监测站并且将其系统化，用于监控森林退化。

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Forest decline is still poorly understood but leads to the loss of a high proportion of a tree's needles or leaves.

人们对森林衰退还知之甚少，但森林衰退会导致树叶和针叶大面积脱落。

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The present paper is a review of the new progress of study on forest decline due to soil acidification from acid rain.

本文主要综述酸雨通过土壤酸化导致森林衰亡方面的国外最新研究进展。

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Lurid reports appeared of widespread forest decline in Germany, where half the trees were said to be in trouble.

ECONOMIST: Plenty of gloom

Scientists in New Zealand say they have linked the modern-day decline of a common forest shrub with the local extinction of two pollinating birds over a century ago.

BBC: New Zealand scientists record 'biodiversity breakdown'

They say the disappearance of two birds - the bellbird and stitchbird - from the upper North Island of the country has lead to a slow decline in common plants, including the forest shrub New Zealand gloxinia.

BBC: New Zealand scientists record 'biodiversity breakdown'