目的:记录澳大利亚南部深水底栖动物和底栖鱼类的生物地理模式,并确定博物馆记录和系统调查数据是否提供匹配的结果。
方法:澳大利亚南部(32-44os)大陆坡(深200-3,000m)。
■海洋底栖动物(节肢动物,苔藓虫,Cnidaria,棘皮病,软体动物,Porifera,Sipuncula,和鱼)。
方法:来自上述分类单元和澳大利亚南部海岸线深度≥200m的所有可用动物电子记录,不管生物体的大小,从澳大利亚博物馆整理,并检查地理和分类的一致性。然后将这些记录分成40个大致相等数量的地理部分,然后在组合组成的多变量分析中将每个片段作为样本处理。还包括了最近(2015年)沿着大澳大利亚湾中部五个南北剖面进行的系统束拖网调查的数据,以进行比较。
结论:尽管采样技术存在差异(单个齿轮与多个齿轮相比),但将系统调查数据与相关的地理部分进行分组,随着随后在分类学偏差方面的差异,使用25毫米的网眼,这将低估博物馆数据中存在的一些较小的生物。因此,博物馆数据和调查数据在整个集合水平上为中央大澳大利亚湾提供了相同的结果。主要的生物地理中断发生在塔斯马尼亚东南部,在新南威尔士州和维多利亚州之间的边界附近发生了第二次重大中断。这表明未使用的博物馆数据在区域空间尺度上描述生物地理模式的潜力,特别是在深海,收集新数据的费用相对较高。
OBJECTIVE: To document biogeographic patterns in the deepwater benthic epifauna and demersal fishes of southern Australia, and determine whether museum records and systematic survey data provide matching results.
METHODS: Southern Australian (32-44oS) continental slope (200-3,000 m deep).
UNASSIGNED: Marine benthic fauna (Arthropoda, Bryozoa, Cnidaria, Echinodermata, Mollusca, Porifera, Sipuncula, and fishes).
METHODS: All available electronic records of fauna from the above taxa and ≥200 m depth off the southern Australian coastline, regardless of organism size, were collated from Australian museums and checked for geographic and taxonomic consistency. These records were then split into 40 geographic segments of roughly equal numbers, with each segment then treated as a sample in multivariate analyses of assemblage composition. Data from a recent (2015) systematic beam trawl survey along five north-south transects in the central Great Australian Bight were also included for comparison.
CONCLUSIONS: The systematic survey data grouped with the associated geographic segments despite differences in sampling technique (single gear compared to multiple gears), with subsequent differences in taxonomic biases, and the use of a 25 mm mesh, which would undersample some smaller organisms present in the museum data. Thus, the museum data and the survey data provided the same results for the central Great Australian Bight at the level of the whole assemblage. The main biogeographic break occurred off southeastern Tasmania, with a second substantial break occurring at around the border between New South Wales and Victoria. This indicates the potential for unused museum data to describe biogeographic patterns over regional spatial scales, especially in the deep sea where the expense of collecting new data is relatively high.