Life and death of a sewage treatment plant recorded in a coral skeleton δ15N record
| Autor: | Kiho Kim, Philip D. Thompson, David M. Baker, Daniel M. Sigman, Nicolas N. Duprey, Jeffrey E. Pleadwell, Laurie J. Raymundo, Xingchen T. Wang |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
010504 meteorology & atmospheric sciences Porites Population Sewage Aquatic Science Oceanography 01 natural sciences Population density education Reef 0105 earth and related environmental sciences geography education.field_of_study geography.geographical_feature_category biology business.industry 010604 marine biology & hydrobiology Coral reef biology.organism_classification Pollution Fishery Environmental science business Eutrophication Environmental issues with coral reefs |
| Zdroj: | Marine Pollution Bulletin. 120:109-116 |
| ISSN: | 0025-326X |
| Popis: | We investigated the potential of coral skeleton δ15N (CS-δ15N) records for tracking anthropogenic-N sources in coral reef ecosystems. We produced a 56 yr-long CS-δ15N record (1958–2014) from a reef flat in Guam that has been exposed to varying 1) levels of sewage treatment 2) population density, and 3) land use. Increasing population density (from < 30 to 300 ind·km− 2) and land use changes in the watershed resulted in a ~ 1‰ enrichment of the CS-δ15N record until a sewage treatment plant (STP) started operation in 1975. Then, CS-δ15N stabilized, despite continued population density and land use changes. Based on population and other considerations, a continued increase in the sewage footprint might have been expected over this time. The stability of CS-δ15N, either contradicts this expectation, or indicates that the impacts on the outer reef at the coring site were buffered by the mixing of reef water with the open ocean. |
| Databáze: | OpenAIRE |
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