Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Watersheds as the Basic Ecosystem: This Conceptual Framework Provides a Basis for a Natural Classification System.
Author Lotspeich, Frederick B. ;
CORP Author National Heart, Lung, and Blood Inst., Bethesda, MD.
Year Published 1980
Report Number EPA-600/J-80-069;
Stock Number PB81-105793
Additional Subjects Classifications ; Watersheds ; Ecology ; Climate ; Geologic structures ; Soils ; Vegetation ; Streams ; Landforms ; Ecosystems
Library Call Number Additional Info Location Last
NTIS  PB81-105793 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/23/1988
Collation 9p
A scheme is outlined to classify watersheds as ecosystems, based on their natural attributes. Two physical factors of the environment, climate and geology, are selected as state factors. Climate is the master factor that supplies energy and water to all ecosystems; geologic structure supplied the material from which the forces of climate carve landforms to establish ecosystems. At the next lower level, soil and vegetation interact in a succession of transactions to produce a mosaic of tesseras within each watershed. It is these interacting tesseras that moderate climate and store energy within the ecosystem that influences the embedded stream. Thus, there is a controlling force consisting of two elements (Climate and geology), a reacting force (soil and vegetation) that responds by circular conditioning to controlling forces, and at the lowest level, the stream which responds to all factors of the living system within its watershed.