Technical Report

 

Ebey’s Landing National Historical Reserve Natural Resource Condition Assessment Public Deposited

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Abstract
  • We compiled existing data and information to characterize the condition and trends in high priority natural resources in Ebey’s Landing National Historical Reserve (EBLA, or "the Reserve"). We identified 29 indicators to evaluate seven major resource concerns. For each indicator we attempted to define reference conditions to which we could compare present conditions. Making that comparison, we described the condition of each indicator as “Good,” “Somewhat Concerning,” “Significant Concern,” or “Indeterminate.” We described each indicator’s trend as “Improving,” “Somewhat Concerning,” “Significant Concern,” or “Indeterminate.” In each instance where we applied these terms, we also described (as high, moderate, or low) the certainty associated with our estimate. Where reference conditions that were the basis for our comparisons lacked quantitative standards, we based the assessment on qualitative descriptions of least-altered resource conditions derived from historical accounts, scientific literature, and professional opinion. Applying the 29 indicators, we determined that the condition of 3 indicators is Good, 9 are "Somewhat Concerning", and the following 8 are "Significant Concern" for condition and/or trend: Temperature Groundwater Levels & Quality Surface Water Quality Prairie Extent, Distribution, & Composition Less Common Plant Species & Communities Forest Composition, Structure, & Age Birds (seabirds, at least) Prairie Wildlife Soundscape Information to estimate trends was insufficient for all but 7 of the indicators, and none of the trends calculations were considered to have a high degree of certainty.
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Citation
  • Adamus, P. R., P. Dunwiddie, and A. Pakenham. 2015. Ebey’s Landing National Historical Reserve Natural Resource Condition Assessment. Natural Resource Report. April 2015 Draft. National Park Service, Fort Collins, Colorado
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Hydrologic Unit Code
  • 1711001910106
  • 1711001910103
  • 1711001911300
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  • This report was prepared under Task Agreement P12AC15016 (Cooperative Agreement H8W07110001) between the National Park Service and Oregon State University.
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