Classification of Community Types, Successional Sequences, and Landscapes of theCopper River Delta, Alaska

摘要

A classification of community types, successional sequences, and landscapes ispresented for the piedmont of the Copper River Delta. The classification was based on a sampling of 471 sites. A total of 75 community types, 42 successional sequences, and 6 landscapes are described. The distribution, vegetation composition and structure, soils, and successional status of each community are discussed. The community types were placed within successional sequences reflecting their successional trends. Geomorphic and soils development are described in detail. Each successional sequence was named after the oldest community type identified in the sequence and the landscape on which it occurs. Diagnostic keys, based on indicator species, are provided to aid in field identification of community types and successional sequences. The dominant landscapes, including outwash plain, tidal marsh, and floodplain, are described by using environmental processes, such as geomorphology, hydrology, and soil development, and by integrating communities and successional sequences into these processes.