Monitoring coastal Río de la Plata oil spillage.

MORENO VICTOR JORGE; IRIBARNE OSCAR OSVALDO; ESCALANTE ALICIA; AIZPUN JULIA ELENA; JANIOT LUCIO; HERAS HORACIO; MENONE MIRTA; MIGLIORANZA KARINA SILVIA BEATRIZ; PEREZ CLAUDIO; ISAACH JUAN PABLO; ABIB ANDREA; CANEPUCCIA ALEJANDRO

Proceeding of Interspill 2004

Año: 2004 p. 1 - 21

On January 15, 1999, 250 m3 of Hydra oil, affected 15 km of shoreline of Magdalena Municipality, Río de la Plata coast, Argentina, after the C/V Sea Paraná struck T/V Estrella Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and Municipality, Río de la Plata coast, Argentina, after the C/V Sea Paraná struck T/V Estrella Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and 3 of Hydra oil, affected 15 km of shoreline of Magdalena Municipality, Río de la Plata coast, Argentina, after the C/V Sea Paraná struck T/V Estrella Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and Río de la Plata coast, Argentina, after the C/V Sea Paraná struck T/V Estrella Pampeana. Clean up efforts were performed, aided by natural processes to reduced mobile oil after the spill. From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and . From the 4th to 36th months 7 oil polluted sites were chosen for longer term assessment of recovery and 2 unoiled sites as controls. There followed monthly degradation of hydrocarbons, ecological and limnological monitoring. Ecological monitoring evaluated the degree and recovery rate of environments and performance of cleaning up procedures. Manual cutting (in the areas where it was done), showed significant impacts during few months on wildlife habitats due to changes in vegetation structure and damage of plant root system by walking while cutting. The performance of different clean up procedures was studied along ecological recovering over time, focusing on the recovery by the bulrush and Zizaniopsis bonariensis. Based on a statistical design, the recovery of communities was compared after the following treatments (unintentionally applied): 1. oiled but not cleaned, 2. oiled and clear-cut, 3. oiled with weathered oil remaining on the surface and no cleaning, and (3) controls not oiled. The periodical follow up of the community structure (plants and birds) showed a slow recovery of clear-cut areas. All other sites showed, no community differences with controls, while the clear-cut areas were in middle successional stages (2002) and almost complete (2003). Objectives of limnological study were to consider the quantity of plankton, larvae and juvenile fish in creeks. Objective for fish populations was to determine whether they had suffered impoverishment. No dead fish were reported. High number of fish larvae and juveniles estimated during warm periods within the studied area would indicate a normal fish reproduction, and sufficient food supply. Objectives for plankton were to know the structure and dynamics of communities from different studied habitats and compare with those of unoiled areas. Quantitative studies have revealed a diatom- and rotifer- dominated plankton community. Differences among sampling sites are not significant, as phyto and zooplankton structure and dynamics concerns compared after the following treatments (unintentionally applied): 1. oiled but not cleaned, 2. oiled and clear-cut, 3. oiled with weathered oil remaining on the surface and no cleaning, and (3) controls not oiled. The periodical follow up of the community structure (plants and birds) showed a slow recovery of clear-cut areas. All other sites showed, no community differences with controls, while the clear-cut areas were in middle successional stages (2002) and almost complete (2003). Objectives of limnological study were to consider the quantity of plankton, larvae and juvenile fish in creeks. Objective for fish populations was to determine whether they had suffered impoverishment. No dead fish were reported. High number of fish larvae and juveniles estimated during warm periods within the studied area would indicate a normal fish reproduction, and sufficient food supply. Objectives for plankton were to know the structure and dynamics of communities from different studied habitats and compare with those of unoiled areas. Quantitative studies have revealed a diatom- and rotifer- dominated plankton community. Differences among sampling sites are not significant, as phyto and zooplankton structure and dynamics concerns . Based on a statistical design, the recovery of communities was compared after the following treatments (unintentionally applied): 1. oiled but not cleaned, 2. oiled and clear-cut, 3. oiled with weathered oil remaining on the surface and no cleaning, and (3) controls not oiled. The periodical follow up of the community structure (plants and birds) showed a slow recovery of clear-cut areas. All other sites showed, no community differences with controls, while the clear-cut areas were in middle successional stages (2002) and almost complete (2003). Objectives of limnological study were to consider the quantity of plankton, larvae and juvenile fish in creeks. Objective for fish populations was to determine whether they had suffered impoverishment. No dead fish were reported. High number of fish larvae and juveniles estimated during warm periods within the studied area would indicate a normal fish reproduction, and sufficient food supply. Objectives for plankton were to know the structure and dynamics of communities from different studied habitats and compare with those of unoiled areas. Quantitative studies have revealed a diatom- and rotifer- dominated plankton community. Differences among sampling sites are not significant, as phyto and zooplankton structure and dynamics concerns