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。
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。
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。
Aluminum toxicity is a major factor in limiting growth in plants in acid soils. It has been suggested to cause forest decline.
铝毒害是酸性土壤上作物生长的主要限制因素和森林大面积退化的重要原因。
The acid deposits have not only directly affected on tree growth but also indirectly through the acidification of forest soil which is probably one of the facts that cause forest decline.
酸性沉降不仅对林木生长产生直接影响，而且通过土壤还对林木产生间接影响。
At the current rate of decline, many of the rain forest animals could become extinct in less than 10 years.
按照目前的下降速度，许多雨林动物不到十年就会绝种。
The species' decline is driven primarily by loss of forest habitat to palm oil plantations and other human land use, according to IUCN.
据国际自然保护联盟说，这个物种衰落的主要原因是棕榈油种植园和其他人类用地使森林栖息地丧失。
Mountaintop coal mining in Appalachia clears patches of forest contributing to the decline of birds like the cerulean warbler that breeds and forests in treetops.
在阿巴拉契亚的山顶的煤矿开采导致森林许多小片土地的减少，从而像蓝鹂莺这样的鸟类繁殖减少。
This paper treats of the causes of site productivity decline of artificial forest, including planting methods, climate, soil, population structure, species and the proper measures.
本文从育林措施、气候、土壤、人工林群落结构、树种等方面概述了引起地力衰退的主要因素和应对策略。
They are found mostly in South Asia and Indonesia but their populations have been in decline for many years due to poaching and loss of forest habitat.
多数发现于东亚和印度尼西亚，近年来由于偷猎和森林植被的减少，它们的数量锐减。
However, the recent steady decline in the forest, young forest, and barren hills and sparse area gradually expanded.
但近期森林不断减少，疏幼林和荒山面积逐渐扩大。
The results showed that forest harvesting resulted in increase in soil volume weight, lessening porosity, and decline in function of water holding.
结果表明：森林采伐后土壤容重增大，孔隙度减小，土壤持水性能降低。
The relationship between the atmospheric SO2 pollution and the decline of the masson pine forest located in Nanshan on the south bank of Yangtze River near Chongqing was studied.
本文运用开顶式熏气装置研究重庆南山大气SO_2污染与马尾松衰亡的关系。
The acid rain in the area is obviously the main reason causing the decline of the forest.
初步肯定酸雨是南山马尾松衰亡的重要原因之一。
The acid rain in the area is obviously the main reason causing the decline of the forest.
初步肯定酸雨是南山马尾松衰亡的重要原因之一。
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