高考考试英语长难句剖析与理解

In 1934, with the passage of the Migratory Bird HuntingStamp Act , an increasingly concerned nation took firm action to sTOP thedestruction of migratory waterfowl and the wetlands so vital to theirsurvival.

本句源于2021年新高考考试全国乙卷（全国卷I）的阅读理解C。请帮忙剖析一下句子结构。譬如 so vital to their survival 是什么成分？句子的意思是？

In1934（时间状语）, with the passage of the Migratory Bird HuntingStamp Act （缘由状语）, an increasingly concerned nation（主语） took firm action（谓语）to sTOP thedestruction of migratory waterfowl and the wetlands so vital to their survival.（状语，其中 the destructionof migratory  waterfowl and thewetlands  是sTOP的宾语，so vital to theirsurvival是wetlands 的后置定语)

大致意思：1934年,伴随候鸟打猎法案的通过, 一个对候鸟打猎愈加关注的国家采取了坚决行动来制止对迁徙的水禽与对他们的存活至关要紧的湿地的破坏。