Nutrient inputs from submarine groundwater discharge on the Santiago reef flat,Bolinao, Northwestern Philippines |
| |
| Institution: | 1. Department of Earth Sciences, Laurentian University, Sudbury, ON P3E 2C6, Canada;2. Department of Geological Science, University of Manitoba, 240 Wallace Bldg, 125 Dysart Rd, Winnipeg, MB R3T 2N2, Canada;3. Department of Earth Sciences, Alexander Murray Building, 300 Prince Philip Drive, Memorial University of Newfoundland, St. John''s, NL A1B 3X5, Canada;1. Centre for Coastal Biogeochemistry, School of Environment, Science and Engineering, Southern Cross University, PO Box 157, Lismore, NSW 2480, Australia;2. GNS Sciences, PO Box 30368, Lower Hutt 5040, New Zealand |
| |
| Abstract: | Submarine groundwater discharge (SGD) on the reef flat of Bolinao, Pangasinan (Philippines) was mapped using electrical resistivity, 222Rn, and nutrient concentration measurements. Nitrate levels as high as 126 μM, or 1–2 orders of magnitude higher than ambient concentrations, were measured in some areas of the reef flat. Nutrient fluxes were higher during the wet season (May–October) than the dry season (November–April). Dissolved inorganic nitrogen (DIN = NO3 + NO2 + NH4) and soluble reactive phosphorus (SRP) fluxes during the wet season were 4.4 and 0.2 mmoles m?2 d?1, respectively. With the increase population size and anthropogenic activities in Bolinao, an enhancement of SGD-derived nitrogen levels is likely. This could lead to eutrophic conditions in the otherwise oligotrophic waters surrounding the Santiago reef flat. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
