Journal
ESTUARIES AND COASTS
Volume 38, Issue 1, Pages 220-231Publisher
SPRINGER
DOI: 10.1007/s12237-014-9800-y
Keywords
Flax Pond; Long Island Sound; Ocean acidification; Net heterotrophy; Hypoxia; Outwelling hypothesis
Funding
- National Science Foundation (NSF) [1129622]
- NOAA's Ocean Acidification Program from the National Centers for Coastal Ocean Science [NA12NOS4780148]
- Chicago Community Trust
- Directorate For Geosciences
- Division Of Ocean Sciences [1129622] Funding Source: National Science Foundation
Ask authors/readers for more resources
Coastal marine organisms experience dynamic pH and dissolved oxygen (DO) conditions in their natural habitats, which may impact their susceptibility to long-term anthropogenic changes. Robust characterizations of all temporal scales of natural pH and DO fluctuations in different marine habitats are needed; however, appropriate time series of pH and DO are still scarce. We used multiyear (2008-2012), high-frequency (6 min) monitoring data to quantify diel, seasonal, and interannual scales of pH and DO variability in a productive, temperate tidal salt marsh (Flax Pond, Long Island, US). pH(NBS) and DO showed strong and similar seasonal patterns, with average (minimum) conditions declining from 8.2 (8.1) and 12.5 (11.4) mg l(-1) at the end of winter to 7.6 (7.2) and 6.3 (2.8) mg l(-1) in late summer, respectively. Concomitantly, average diel fluctuations increased from 0.22 and 2.2mg l(-1) (February) to 0.74 and 6.5 mg l(-1) (August), respectively. Diel patterns were modulated by tides and time of day, eliciting the most extreme minima when low tides aligned with the end of the night. Simultaneous in situ pCO(2) measurements showed striking fluctuations between similar to 330 and similar to 1,200 (early May), similar to 2,200 (mid June), and similar to 4,000 mu atm (end of July) within single tidal cycles. These patterns also indicate that the marsh's strong net heterotrophy influences its adjacent estuary by 'outwelling' acidified the coupled and fluctuating nature of pH and DO conditions in productive coastal and estuarine environments, which have yet to be adequately represented by experiments.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available