title: Determining ecoregions for environmental and GMO monitoring networks.
abstract: A representative environmental monitoring network at the regional scale cannot use raster-based or random sampling designs, but requires a stratified sampling procedure integrating different information layers, and it has to occur in ecologically differing homogeneous regions (ecoregions). These we have determined using a set of spatial strata with ecological variables which we analysed with classification and regression trees (CART). We present a framework for environmental monitoring, that covers different scales, and we transfer the framework to a potential GMO (genetically modified organisms) monitoring network. We use ecoregion and other environmental strata together with existing environmental monitoring networks to determine GMO monitoring sites more precisely.
authors.affiliation: Leibniz Centre for Agricultural Landscape- and Land Use Research, Eberswalder Str. 84, Müncheberg, Germany. fgraef@zalf.de
authors.forename: F
authors.initials: F
authors.lastname: Graef
authors.forename: G
authors.initials: G
authors.lastname: Schmidt
authors.forename: W
authors.initials: W
authors.lastname: Schröder
authors.forename: U
authors.initials: U
authors.lastname: Stachow
mesh_terms: D000383:Agriculture; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods* / Q000706:statistics & numerical data; D005858:Germany; D030781:Organisms, Genetically Modified