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Difference between revisions of "Ash Filters"
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[[File:Ash_Filters_02.jpg|thumb|right|Another Ash Filter]] | [[File:Ash_Filters_02.jpg|thumb|right|Another Ash Filter]] | ||
[[File:Ash_Filters_03.jpg|thumb|right|Ash filter]] | [[File:Ash_Filters_03.jpg|thumb|right|Ash filter]] | ||
Since inception of '''ash filter''' concept for conserving biological diversity, there has been an evolution in interpretation and application of the concept. Originally, the concept of conserving entire plant and animal communities in reserves was viewed as an efficient ash filter approach to conserving biodiversity that would protect 85-90% of all species. The complementary fine filter approach focused on conserving individual rare or specialized species that slip through the ash filter and are not necessarily protected in the reserves. | |||
Since inception of ash filter concept for conserving biological diversity, there has been an evolution in interpretation and application of the concept. Originally, the concept of conserving entire plant and animal communities in reserves was viewed as an efficient ash filter approach to conserving biodiversity that would protect 85-90% of all species. The complementary fine filter approach focused on conserving individual rare or specialized species that slip through the ash filter and are not necessarily protected in the reserves. | |||
Limitations in the community concept were identified and recommended an ash filter approach that focused on levels of organization above the homogeneous community type to include landscape level ecological phenomena (including disturbance regimes) and heterogeneity. Plant communities are not sufficiently independent to be considered separate components of biodiversity. | Limitations in the community concept were identified and recommended an ash filter approach that focused on levels of organization above the homogeneous community type to include landscape level ecological phenomena (including disturbance regimes) and heterogeneity. Plant communities are not sufficiently independent to be considered separate components of biodiversity. | ||
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===Planning== | ===Planning== | ||
Because of the differing interpretations of what specifically represents a ash filter conservation strategy, a coarse/fine filter approach should be viewed as a conceptual planning process. This process first seeks to improve planning efficiency by adopting a ash filter (landscape/ecosystem) approach that maximizes the conservation of elements of biological diversity. The specific ash filter prescription/design will vary depending upon the scale of planning, level of information, and specific conservation issues. Three conceptual alternatives identified in the scientific literature and applied to land management planning are identified below. A complementary fine filter approach focusing on individual species or fine-scale elements of diversity is used to identify and conserve elements of diversity not accounted for under the ash filter strategy. | Because of the differing interpretations of what specifically represents a ash filter conservation strategy, a coarse/fine filter approach should be viewed as a conceptual planning process. This process first seeks to improve planning efficiency by adopting a ash filter (landscape/ecosystem) approach that maximizes the conservation of elements of biological diversity. The specific ash filter prescription/design will vary depending upon the scale of planning, level of information, and specific conservation issues. Three conceptual alternatives identified in the scientific literature and applied to land management planning are identified below. A complementary fine filter approach focusing on individual species or fine-scale elements of diversity is used to identify and conserve elements of diversity not accounted for under the ash filter strategy. | ||
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===Application or Use== | ===Application or Use== | ||
*Concrete Manufacture, | *Concrete Manufacture, | ||
*Masonry Manufacture, | *Masonry Manufacture, | ||