Nilssen Ingunn, dos Santos Francisco, Coutinho Ricardo, Gomes Natalia, Cabral Marcelo Montenegro, Eide Ingvar, Figueiredo Marcia A O, Johnsen Geir, Johnsen Ståle
Statoil ASA, Research, Development and Innovation, N-7005 Trondheim, Norway; Trondhjem Biological Station, Department of Biology, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
PROOCEANO Serviço Oceanográfico, Av. Rio Branco, 311 - sala 1205 Centro, Rio de Janeiro, RJ, Brazil.
Mar Environ Res. 2015 Dec;112(Pt A):68-77. doi: 10.1016/j.marenvres.2015.09.008. Epub 2015 Sep 24.
The potential impact of drill cuttings on the two deep water calcareous red algae Mesophyllum engelhartii and Lithothamnion sp. from the Peregrino oil field was assessed. Dispersion modelling of drill cuttings was performed for a two year period using measured oceanographic and discharge data with 24 h resolution. The model was also used to assess the impact on the two algae species using four species specific impact categories: No, minor, medium and severe impact. The corresponding intervals for photosynthetic efficiency (ΦPSIImax) and sediment coverage were obtained from exposure-response relationship for photosynthetic efficiency as function of sediment coverage for the two algae species. The temporal resolution enabled more accurate model predictions as short-term changes in discharges and environmental conditions could be detected. The assessment shows that there is a patchy risk for severe impact on the calcareous algae stretching across the transitional zone and into the calcareous algae bed at Peregrino.
评估了钻屑对佩雷格里诺油田的两种深水钙质红藻——恩氏叶状藻（Mesophyllum engelhartii）和石枝藻属（Lithothamnion sp.）的潜在影响。利用分辨率为24小时的实测海洋学和排放数据，对钻屑进行了为期两年的扩散建模。该模型还用于通过四种特定于物种的影响类别评估对这两种藻类的影响：无影响、轻微影响、中等影响和严重影响。根据两种藻类光合作用效率（ΦPSIImax）与沉积物覆盖度的暴露-响应关系，得出了相应的区间。时间分辨率能够检测到排放和环境条件的短期变化，从而实现更准确的模型预测。评估表明，在佩雷格里诺，钙质藻类受到严重影响的风险呈斑块状分布，横跨过渡带并延伸至钙质藻床。
