Abstract：
Toxic cyanobacterial blooms in various water bodies have been given much attention nowadays as they release hazardous substances in the surrounding areas. These toxic planktonic cyanobacteria in shrimp ponds greatly affect the survival of shrimps. Ecuador is the second highest shrimp producing country in the Americas after Brazil; and the shrimp-based economy is under threat due to toxic cyanobacterial blooms in Ecuador shrimp ponds. This study investigated the abundance of different cyanobacteria in the shrimp ponds at the Chone and Jama rivers (in Manabi province) at Ecuadorian pacific coast, focusing on different environmental factors, such as temperature, pH, salinity, and light. Temperature and pH were identified as key factors in influencing the abundance of cyanobacteria, with a significant positive correlation between Raphidiopsis raciborskii and pH. The highest and lowest abundance of cyanobacteria found during the dry season in the shrimp ponds near the Chone and Jama rivers were > 3 × 106 and 1 × 106 Cell.m-3, respectively. The Shannon-Wiener Diversity Index fluctuated between 0.41-1.15 and 0.31-1.15 for shrimp ponds of Chone and Jama rivers, respectively. This variation was linked to changes in salinity and the presence of harmful algal blooms, highlighting the importance of continuous monitoring. Additionally, the study areas showed eutrophic conditions with low diversity, underlining the need for additional spatiotemporal studies and expanded research in both rivers, to better understand these complex phenomena. The findings underscore the importance of continuous monitoring and expanded research in cyanobacteria ecology, with implications for public health and aquatic resource management.
摘要：
由于各种水体中的有毒蓝藻水华在周围区域释放有害物质，因此如今受到了广泛关注。虾池塘中的这些有毒浮游蓝细菌极大地影响了虾的存活。厄瓜多尔是仅次于巴西的美洲第二大虾生产国；由于厄瓜多尔虾池中有毒的蓝藻水华，以虾为基础的经济受到威胁。这项研究调查了厄瓜多尔太平洋沿岸的Chone和Jama河（位于Manabi省）的虾池中不同蓝细菌的丰度，关注不同的环境因素，如温度，pH值,盐度,和光。温度和pH是影响蓝藻丰度的关键因素,raphiopsisraciborskii与pH之间呈显着正相关。在干旱季节，在Chone和Jama河附近的虾池中发现的蓝细菌丰度最高和最低，分别为>3×106和1×106Cell。分别为m-3。Chone和Jama河虾池的Shannon-Wiener多样性指数在0.41-1.15和0.31-1.15之间波动，分别。这种变化与盐度的变化和有害藻华的存在有关，强调持续监测的重要性。此外,研究区域显示出多样性低的富营养化条件，强调需要在两条河流中进行额外的时空研究和扩大研究，更好地理解这些复杂的现象。这些发现强调了持续监测和扩大蓝藻生态学研究的重要性，对公共卫生和水生资源管理有影响。
