For the Ross Sea, the only Marine Protected Area in Antarctica, available data on the tintinnid ciliates of the marine microzooplankton are mostly limited to nearshore waters near Terra Nova Bay or the vicinity of the McMurdo Sound. Here, we report results from a geographically extensive sampling across the Ross Sea conducted in December 2020. Material from plankton net tows (20 µm mesh), made at 38 stations spanning over 30° of latitude, was examined. We found 11 tintinnid species of varying commonality or rarity, many showing considerable morphological variability that is here documented. We found four forms that had not been previously reported from the Ross Sea. Based on our findings and previous reports, we assembled a species accumulation curve showing the growth in the inventory of tintinnid species recorded from the Ross Sea as a function of sampling effort and time since 1983. Extrapolation of the species accumulation curve, derived from sampling over the last 37 years, indicates that continued sampling will likely provide new species records, suggesting that the Ross Sea is under-sampled at present. This complicates efforts to detect temporal changes in species compositions, at least with regard to tintinnid ciliates. Comparing species accumulation curves for the Ross Sea and the relatively well-studied Weddell Sea, it appears that the Ross Sea may be more species-rich.

对于南极洲唯一的海洋保护区罗斯海，关于海洋微型浮游动物的丁丁纤毛虫的可用数据大多限于特拉诺瓦湾附近或麦克默多海峡附近的近岸水域。在这里，我们报告了 2020 年 12 月在罗斯海进行的地理广泛采样的结果。检查了在跨越 30° 纬度的 38 个站点制造的浮游生物网束（20 µm 网眼）的材料。我们发现了 11 种具有不同共性或稀有性的 tintinnid 物种，其中许多表现出相当大的形态变异性，此处记录在案。我们发现了四种以前从未从罗斯海报告过的表格。根据我们的发现和之前的报告，我们组装了一个物种积累曲线，显示了自 1983 年以来从罗斯海记录的 tintinnid 物种库存的增长与采样工作和时间的关系。从过去 37 年的采样中得出的物种积累曲线的外推表明，持续采样可能会提供新的物种记录，这表明罗斯海目前的采样不足。这使得检测物种组成的时间变化的工作变得复杂，至少在 tintinnid 纤毛虫方面是这样。比较罗斯海和相对充分研究的威德尔海的物种积累曲线，似乎罗斯海的物种可能更加丰富。表明继续采样可能会提供新的物种记录，这表明罗斯海目前的采样不足。这使得检测物种组成的时间变化的工作变得复杂，至少在 tintinnid 纤毛虫方面是这样。比较罗斯海和相对充分研究的威德尔海的物种积累曲线，似乎罗斯海的物种可能更加丰富。表明继续采样可能会提供新的物种记录，这表明罗斯海目前的采样不足。这使得检测物种组成的时间变化的工作变得复杂，至少在 tintinnid 纤毛虫方面是这样。比较罗斯海和相对充分研究的威德尔海的物种积累曲线，似乎罗斯海的物种可能更加丰富。