Chang Junning, Symes William S, Lim Felix, Carrasco L Roman
Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore, 117543, Republic of Singapore.
Ambio. 2016 May;45(4):387-97. doi: 10.1007/s13280-016-0768-7. Epub 2016 Mar 9.
Despite the large implications of the use of tropical land for exports ("land absorption") on ecosystem services (ES) and global biodiversity conservation, the magnitude of these externalities is not known. We quantify the net value of ES lost in tropical countries as a result of cropland, forestland and pastureland absorption for exports after deducting ES gains through imports ("land displacement"). We find that net ES gains occur only in 7 out of the 41 countries and regions considered. We estimate global annual net losses of over 1.7 x 10(12) international dollars (I$) (I$1.1 x 10(12) if carbon-related services are not considered). After deducting the benefits from agricultural, forest and livestock rents in land replacing tropical forests, the net annual losses are I$1.3 and I$0.7 x 10(12), respectively. The results highlight the large magnitude of tropical ES losses through international trade that are not compensated by the rents of land uses in absorbed land.
尽管热带土地用于出口(“土地吸纳”)对生态系统服务(ES)和全球生物多样性保护具有重大影响,但这些外部影响的程度尚不清楚。我们在扣除通过进口获得的生态系统服务收益(“土地置换”)后,量化了热带国家因农田、林地和牧场用于出口吸纳而损失的生态系统服务的净值。我们发现,在所考虑的41个国家和地区中,只有7个出现了生态系统服务净收益。我们估计全球每年的净损失超过1.7×10¹²国际美元(如果不考虑与碳相关的服务,则为1.1×10¹²国际美元)。扣除替代热带森林的土地上农业、森林和畜牧业租金带来的收益后,每年的净损失分别为1.3×10¹²国际美元和0.7×10¹²国际美元。研究结果凸显了国际贸易导致的热带生态系统服务大量损失,而被吸纳土地上土地利用租金并未对此进行补偿。