Low phosphorus sediments in a hypersaline marine bay |
| |
| Institution: | 1. School of Natural Sciences & Centre for Marine Ecosystems Research, Faculty of Health, Engineering and Science, Edith Cowan University, Joondalup 6027, WA, Australia;2. The UWA Oceans Institute, The University of Western Australia, Crawley, WA, Australia;3. Centro de Estudios Avanzados de Blanes, Consejo Superior de Investigaciones Científicas, Blanes 17300, Spain;4. Red Sea Research Center, King Abdullah University of Science and Technology, 4700 KAUST, Thuwal 23955-6900, Saudi Arabia;5. Institut Mediterrani d''Estudis Avançats, Department of Global Change Research, IMEDEA (CSIC-UIB), Mallorca, Spain;6. Departamento Edafologia y Quimica Agricola, Facultad di Biologia, Campus Sur s/n, 15706 Santiago, Spain;7. School of Physics, The University of Western Australia, Crawley, WA 6009, Australia;8. Departament de Física and Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona, 08193 Bellaterra, Catalonia, Spain;9. School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia;10. The School of Plant Biology, The University of Western Australia, Crawley, WA, Australia |
| |
| Abstract: | Shark Bay, Western Australia is a large, shallow, hypersaline coastal lagoon with low nutrient input. Dissolved inorganic P in the water column decreased from 0·2 μm in the oceanic region of the bay to undetectable limits in the hypersaline areas of the bay. Organic C, total N, and total P were measured in the sediments along the salinity gradient. The sediment organic C was 1–3 mmol C g?1 and increased into the bay; total N was positively correlated with C; but P decreased from 15 μmol P g?1 in the outer bay to less than 1 μmol P g?1 in the hypersaline region. Sediment inorganic P comprised 80–90% of the total sediment P. The molar C:P ratio of the sediment organic phase increased from 1700 in the outer bay to 12 000 in the hypersaline region. Organic C and total P were also measured in the benthic plants. P content of the plants also decreased as salinity increased, resulting in an increase in the plant C:P ratio which was similar to the increase in the C:P ratio of the sediment organic phase. P composition of the coastal sediments can change dramatically in a relatively short distance as a result of net uptake and sedimentation by benthic communities. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
