An account is given of the work on the forests of Viet Nam of the US Academy of Sciences' Committee on the Effects of Herbicides in South Viet Nam during 1971–74. Owing to the insecure state of the country at the time, very little work on the ground was possible. The Committee's conclusions had therefore to depend largely on observations from the air and aerial photography, and were subject to considerable errors.The appearance after herbicide spraying of the Inland and mangrove forests as seen from the air in 1971 and 1972 is described. In the Inland forest most of the emergent trees were killed, but much of the undergrowth remained alive. In addition to the effects of herbicides, the Inland forests suffered widespread damage from bombing and other military operations. In the mangrove forests, herbicide spraying destroyed almost the whole biomass, resulting in the complete denudation of vast areas of soft sediments.
Predation and intertidal zonation of barnacles at Leigh, New Zealand