翻译练习：Global Soils Underpin Life But Future Looks 'Bleak'（3）

线虫纲

Microbial species are essential for turning waste into nutrients, but Eisenhauer said an estimated 99% of them had yet to be studied by scientiests. He also said that, by number, four out of every five animals on Earth are tiny soil worms called nematodes, yet only a tiny fraction of these species have been recorded.

微生物物种是将废物转为营养的关键，但是艾森豪尔说，预计99%的微生物尚未被科学家研究过。他还说，从数量上，地球上每5个动物中有4个为生活在土壤中称为线虫的微小蠕虫，然而这些物种只有极少的部分被记录过。

脚下的生物多样性对人类非常重要

In a foreword to the report, Qu Dongyu, the FAO head, and Elizabeth Maruma Mrema, the head of the UN convention on biological persity, said:"Our wellbeing and the livelihoods of human societies are highly dependent on biopersity [but while] there is increasing attention on the importance of above-ground biopersity, less attention is being paid to the biopersity beneath our feet."

在报告的序言中，粮农组织总干事屈冬玉与《联合国生物多样性公约》的负责人伊丽莎白・马鲁玛・姆雷马说：“我们的幸福与人类社会的生计高度依赖于生物多样性，（尽管）地表以上的生物多样性得到越来越多的关注，可是对我们脚下的生物多样性的关注仍然很少。”

土壤流失，退化

The main causes of damage to soils are intensive agriculture, with excessive use of fertilisers, pesticides and antibiotics killing soil organisms and leaving it prone to erosion. The destruction of forests and natural habitats to create farmland also degrades soil, particularly affecting the symbiotic fungi that are important in helping trees and plants grow. Rising global temperatures, with increasing droughts and wildfires, are another factor, but scientists remain uncertain about how all the different drivers interact.

土壤破坏的主要原因是集约化农业，过度使用化肥，农药和抗生素杀死了土壤微生物，让土壤易于流失。森林被毁坏，毁林造田也使得土壤退化，特别是深深影响到对帮助树和植物生长的共生真菌。上升的全球气温，加上干旱和森林火灾，是另外的因素，但是科学家们仍然没有弄清楚所有这些因素是如何相互作用的。