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USING MARINE ALGAE AS BIOINDICATORS OF ANTHROPOGENIC NUTRIENT POLLUTION IN HAWAIIAN COASTAL WATERS
EP21488
Poster Title: USING MARINE ALGAE AS BIOINDICATORS OF ANTHROPOGENIC NUTRIENT POLLUTION IN HAWAIIAN COASTAL WATERS
Submitted on 27 Feb 2014
Author(s): Amato D.A, Bishop J.M, Glenn C.R., Smith C.M.
Affiliations: University of Hawaii at Manoa
Poster Views: 2,934
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Poster Information
Abstract: The ability to detect, quantify and determine sources of coastal pollution provides the possibility of identifying drivers of invasive algal blooms. Using common reef algae (Ulva lactuca, Acanthophora spicifera, and Hypnea musiformis) as nutrient bioindicators, we deployed and/or collected these plants at experimental sites on Oahu and Maui. Paired algal tissue and water samples were analyzed to determine if tissue nitrogen is correlated with various types and levels of terrestrial anthropogenic inputs. Algal tissue nitrogen (%N) is correlated with nitrogen levels in coastal waters and appears to be an effective indicator of nutrient loading and our results indicate SGD is a major vector delivering nutrient polluted groundwater to coastal regions in Hawaii. Suggested guidelines for identifying sources of nutrients to coastal waters are outlined using location, adjacent land-use, and trends in algal tissue δ15N values across gradients of SGD. This study has important implications for coral reef health, public safety and coastal conservation on both local and regional scales. Summary: Using common reef algae (Ulva lactuca, Acanthophora spicifera, and Hypnea musiformis) as nutrient bioindicators, we deployed and/or collected these plants at experimental sites on Oahu and Maui. Algal tissue nitrogen (%N) is correlated with nitrogen levels in coastal waters and appears to be an effective indicator of nutrient loading and our results indicate SGD is a major vector delivering nutrient polluted groundwater to coastal regions in Hawaii. References: References
1. Dailer ML, Knox RS, Smith JE, Napier M, Smith CM (2010) Using δ15N values in algal tissue to map locations and potential sources of anthropogenic nutrient inputs on the island of Maui, Hawai'i, USA. Mar Poll Bull 60: 655-671.
2. Hunt CD, Rosa SN (2009) A multitracer approach to detecting wastewater plumes from municipal injection wells in nearshore marine waters at Kihei and Lahaina, Maui, Hawaii. U.S. Geological Survey Scientific Investigations Report 2009-5253. 166 p.Report abuse »
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