Tracking the Dynamic Ecological History of a Tropical Urban Estuary as it Responds to Human Pressures

被引:7
作者
Oczkowski, A. [1 ]
Santos, E. [2 ]
Gray, A. [3 ]
Miller, K. [4 ]
Huertas, E. [5 ]
Hanson, A. [1 ]
Martin, R. [6 ]
Watson, E. B. [7 ]
Wigand, C. [1 ]
机构
[1] US EPA, Atlantic Ecol Div, 27 Tarzwell Dr, Narragansett, RI 02882 USA
[2] Humboldt State Univ, Coll Nat Resources & Sci, 1 Harpst St, Arcata, CA 95521 USA
[3] Univ Calif Riverside, Dept Environm Sci, Riverside, CA 92521 USA
[4] CSRA LLC, 6361 Walker Lane Suite 300, Alexandria, VA 22310 USA
[5] US EPA, Reg Caribbean Off 2, City View Plaza 2,Suite 7000, Guaynabo, PR 00968 USA
[6] Dataquest, 548 Market St,73537, San Francisco, CA 94104 USA
[7] Drexel Univ, Acad Nat Sci, 1900 Benjamin Franklin Pkwy, Philadelphia, PA 19103 USA
基金
美国食品与农业研究所;
关键词
dredging; stable isotope; nitrogen; carbon; sulfur; deposition; ISOTOPE FRACTIONATION; ACETYLENE-REDUCTION; SIZE DISTRIBUTION; SEDIMENTS; BAY; FIXATION; MARINE;
D O I
10.1007/s10021-019-00399-1
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Coastal cities in tropical areas are often low-lying and vulnerable to the effects of flooding and storms. San Juan, Puerto Rico, is a good example of this. It is built around a lagoon-channel complex called the San Juan Bay Estuary (SJBE). A critical channel in the estuary, the Cano Martin Pena, has filled in and now frequently floods the surrounding communities with sewage-enriched waters, causing a series of human health and ecological problems. Sediment core analyses indicate that portions of the SJBE now function as settling basins. High urban and sewage runoff to the Cano contributes nitrogen (N), but stable isotope and sediment nutrient analyses indicate that this runoff may also enhance conditions for coupled sulfate reduction-nitrogen fixation. The amount of 'new' bioavailable N created from inert atmospheric N-2 gas may meet or exceed that from the runoff into the Cano Martin Pena. The ecological consequences of this appear to extend beyond the ponded channel, potentially contributing to the poor water quality of the SJBE, greater than contaminated runoff alone.
引用
收藏
页码:231 / 245
页数:15
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