https://vocabularyserver.com/usgs/https://vocabularyserver.com/usgs/xml.php?skosTema=468ecosystem functions https://vocabularyserver.com/usgs/xml.php?skosTema=468 ecological processes BT https://vocabularyserver.com/usgs/xml.php?skosTema=468 wetland functions NT https://vocabularyserver.com/usgs/xml.php?skosTema=468 ecosystem services UF https://vocabularyserver.com/usgs/xml.php?skosTema=468 estuarine ecosystem functions UF