Wetlands: An Overview of Issues

Copeland, Claudia ; Zinn, Jeffrey A.

Library of Congress. Congressional Research Service.

关键词: Wetland conservation;    Wetland ecology;    Wetlands;   

RP-ID  :  RL33483
RP-ID  :  RL33483_2008Jul08

美国|英语

来源: UNT Digital Library

【 摘 要 】

The report documents recent changes in wetland acres. The U.S. Fish and Wildlife Service released its most recent periodic survey of changes in wetland acreage nationwide in March 2006. Covering 1998 to 2004, it concluded that during this time period there was a small net gain in overall wetland acres for the first time that this survey has been conducted. Others caution, however, that much of this gain was in ponds, rather than natural wetlands.