Academic Journal
Coral reefs chronically exposed to river sediment plumes in the southwestern Caribbean: Rosario Islands, Colombia
| العنوان: | Coral reefs chronically exposed to river sediment plumes in the southwestern Caribbean: Rosario Islands, Colombia |
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| المؤلفون: | Restrepo, Juan Darío, Park, E., Aquino, S., Latrubesse, E.M. |
| المساهمون: | Universidad EAFIT. Departamento de Geología, Ciencias del Mar |
| المصدر: | SCIENCE OF THE TOTAL ENVIRONMENT |
| بيانات النشر: | Elsevier |
| سنة النشر: | 2016 |
| المجموعة: | Universidad EAFIT, Medellin: Repositorio Institucional |
| مصطلحات موضوعية: | Caribbean, Magdalena River, Sediment load, Rosario Islands, River plume, Coral reef management |
| الوصف: | Politicians do not acknowledge the devastating impacts river ne sediments can have on healthy coral reef ecosystems during environmental debates in Caribbean countries. Therefore, regional andlor local decision makers do not implement the necessary measures to reduce fluvial sediment fluxes on coral reefs.The Magdalena River, the main contributor of continental fluxes into the Caribbean Sea, delivers water and sediment fluxes into the Rosario Islands National Park, an important marine protected area in the southwestern Caribbean. Until now, there is no scientific consensus on the presence of sediment fluxes from the Magdalena River in the coral reefs of the Rosario Islands. Our hypothesis is that high sediment and freshwater inputs from the Magdalena have been present at higher acute levels during the last decade than previously thought, and that these runoff pulses are not flashy. We use in-situ calibrated MODIS satellite images to capture the spatiotemporal variability of the distribution of suspended sediment over the coral reefs. Furthermore, geochemical data are analyzed to detect associated sedimentation rates and pollutant dispersion into the coastal zone. Results confirm that turbidity levels have been much higher than previous values presented by national environmental authorities on coral reefs off Colombia over the last decade. During the 2003-2013 -period most of the Total Suspended Sediments (TSS) values witnessed in the sampled regions were above 10 mg/I, a threshold value of turbidity for healthy coral reef waters. TSS concentrations throughout the analyzed time were up to 623 mg,I. Plume pulses were more pronounced during wet seasons of La Nina events in 2002-2003, 2007-2008, and 2009-2010. Reconstructed time series of MODIS TSS indicates that coral reef waters were exposed to river plumes between 19.6 and 47.3% of the entire period of analysis (2000-2013), Further analyses of time series of water discharge and sediment load into the coastal zone during the last two decades show temporal ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| ردمك: | 978-0-00-373220-7 0-00-373220-7 |
| تدمد: | 00489697 18791026 |
| Relation: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84959421301&doi=10.1016%2fj.scitotenv.2016.02.140&partnerID=40&md5=6f4496182e65d43d3b361ecac46d791a; https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1915; WOS;000373220700031; PUBMED;26933966; SCOPUS;2-s2.0-84959421301; http://hdl.handle.net/10784/26899 |
| DOI: | 10.1016/j.scitotenv.2016.02.140 |
| الاتاحة: | http://hdl.handle.net/10784/26899 https://eafit.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1915 https://doi.org/10.1016/j.scitotenv.2016.02.140 |
| Rights: | https://v2.sherpa.ac.uk/id/publication/issn/0048-9697 |
| رقم الانضمام: | edsbas.CE7C08DE |
| قاعدة البيانات: | BASE |
| ردمك: | 9780003732207 0003732207 |
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| تدمد: | 00489697 18791026 |
| DOI: | 10.1016/j.scitotenv.2016.02.140 |