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Browse History: Overall Bay (2010)

Chesapeake Bay - Reporting Region Summary:



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Bay Health Index
Benthic Index of Biotic Integrity Icon
42%
C-
Overall Bay: 2010

Moderately poor ecosystem health. The overall health of the Bay declined for the first time in four years, from 46% in 2009 to 42% in 2010. Four of the six indicators—chlorophyll a, water clarity, aquatic grasses, and benthic community—declined in score, while dissolved oxygen remained steady and phytoplankton community scores increased slightly.
  • Water quality: Dissolved oxygen scores remained the same as last year (81%), and consistent with the moderately good to good ranking seen for the entire period of record. Chlorophyll a and water clarity scores declined slightly, scoring in the poor to very poor range, respectively.
  • Biotic Indicators: All biotic indicators stayed relatively constant from 2009. Aquatic grasses and benthic community condition scores decreased slightly (by 2% and 6%, respectively) but remained in the same conditions. Phytoplankton community scores improved by 1%, remaining in moderate condition.

Score Legend
Locator Map
  Index/Indicator Score     Index/Indicator Score
Benthic Index of Biotic Integrity Icon Chlorophyll a
22%
  Benthic Index of Biotic Integrity Icon Aquatic grasses
37%
Benthic Index of Biotic Integrity Icon Dissolved oxygen
81%
  Benthic Index of Biotic Integrity Icon Benthic Index of Biotic Integrity
47%
Benthic Index of Biotic Integrity Icon Water clarity
18%
  Benthic Index of Biotic Integrity Icon Phytoplankton Index of Biotic Integrity
50%
 
Benthic Index of Biotic Integrity Icon Water Quality Index
40%
  Biotic Index Icon Biotic Index
44%
 

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