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This geospatially explicit vector-based polygon dataset identifies 85 terrestrial ecological subsection delineations present in Southeast Alaska and the Tongass National Forest. Within each subsection one can expect to find a relatively consistent occurence and distribution of vegetation types. Due to the hydrologically-influenced geomorphology of Southeast Alaska specific key indicators of physiography, lithology, and surface geology were employed to systematically distinguish terrestrial ecosystems.
Tags: Alaska,
Alaska,
Canada,
Canada,
NPLCC, All tags...
SE AK,
SE AK,
Southeast Alaska,
Southeast Alaska,
Tongass,
Tongass,
division,
division,
domain,
domain,
ecological,
ecological,
ecological unit,
ecological unit,
ecology,
ecology,
geology,
geology,
geoscientificInformation,
geoscientificInformation,
hierarchy,
hierarchy,
lithology,
lithology,
physiography,
physiography,
province,
province,
section,
section,
subsection,
subsection,
surficial,
surficial,
terrestrial,
terrestrial, Fewer tags
This data set represents ecological sections within the conterminous United States. This data set contains regional geographic delineations for analysis of ecological relationships across ecological units. The U.S. Department of Agriculture (USDA), Forest Service, in participation with numerous individuals of Federal and State agencies and nongovernmental organizations (NGOs), has been developing and refining ecological maps of the United States through the process of peer review and successive approximations since 1976 (Bailey 1976). Ecological mapping and descriptions follow the USDA Forest Service's National Hierarchical Framework of Ecological Units (ECOMAP 1993, Cleland et al. 1997). This 2007 map is the first...
This layer contains polygon features of Ecological Units for the state of California as described by ECOMAP (1993),.. "Ecological types are classified and ecological units are mapped based on associations of those biotic and environmental factors that directly affect or indirectly express energy, moisture, and nutrient gradients which regulate the structure and function of ecosystems. These factors include climate, physiography, water, soils, air, hydrology, and potential natural communities."
This layer contains polygon features of Ecological Units for the state of California as described by ECOMAP (1993),.. "Ecological types are classified and ecological units are mapped based on associations of those biotic and environmental factors that directly affect or indirectly express energy, moisture, and nutrient gradients which regulate the structure and function of ecosystems. These factors include climate, physiography, water, soils, air, hydrology, and potential natural communities."
This layer contains polygon features of Ecological Units for the state of California as described by ECOMAP (1993),.. "Ecological types are classified and ecological units are mapped based on associations of those biotic and environmental factors that directly affect or indirectly express energy, moisture, and nutrient gradients which regulate the structure and function of ecosystems. These factors include climate, physiography, water, soils, air, hydrology, and potential natural communities."
This layer contains polygon features of Ecological Units for the state of California as described by ECOMAP (1993),.. "Ecological types are classified and ecological units are mapped based on associations of those biotic and environmental factors that directly affect or indirectly express energy, moisture, and nutrient gradients which regulate the structure and function of ecosystems. These factors include climate, physiography, water, soils, air, hydrology, and potential natural communities."
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