背景:大型藻类在底栖生态系统中起着结构化作用,这使得监测他们的覆盖率并及时研究他们的社区结构和变化变得非常重要。此类研究通常由自主潜水员领导,并且通常无法产生足够的数据来为战略性合理的保护计划提供足够的材料。本文介绍了在评估互补数据采集方法潜力的框架中生成的数据集:注释使用水下遥控飞行器(ROV)获得的视频截面。重点是Cystoseirabrachycarpa,以及其他几种大型藻类的丰富,通过标本鉴定验证后,可以使用ROV图像进行鉴定。此外,为了允许将来使用,例如监测入侵藻类Caulerpacylindracea的定殖状态,水下机器人被送到波西多尼亚草甸下限以下沉积生境(40m)的一些更深的样带。
结论:该项目,在提供一些关于使用水下机器人作为研究海洋生物多样性的工具的有趣见解的同时,生成了一个数据集,用于在Calvi湾的标准化和新样带上分布19种大型藻类(Katz等人。2021)。观察到的大型藻类包括:髋臼,两栖动物,Caulerpaprofera,大包干,Codiumbursa,Colpomeniasinuosa,Corallinales(订单),Cystoseirabrachycarpa,膀胱,Cystoseirspinosa,膀胱类固醇,Dictyota(属),Flabelliapetiolata,Halopteris(属),Halopterisscoparia,Jania(属),Osmundariavolubilis,帕迪娜·帕沃尼卡和佩森纳里亚斯夸里亚。视频还显示,入侵藻类Caulerpacylindracea已在2016年至2019年之间传播,应在海湾进行更有针对性的研究,以评估这种入侵的实际范围和可能影响。最后,我们的水下机器人视频剖面也强调了在底栖栖息地地图上被描述为“软底”的栖息地区域上存在的特定底栖大型藻类群落。尽管这些社区的单位面积生物量可能低于大多数沿海岩石底部,这种广泛传播的栖息地类型对沿海生态系统模型中的初级生产有贡献。
BACKGROUND: Macroalgae play a structuring role in benthic ecosystems, which makes it very important to monitor their cover rates and study their community structures and changes in time. Such studies are usually led by autonomous divers and often do not generate sufficient data to provide enough material for strategically-sound conservation plans. This paper describes the dataset generated in the framework of the evaluation of the potential of a complementary data acquisition method: annotating videos transects obtained using an underwater Remotely Operated Vehicle (ROV).The focus was on Cystoseirabrachycarpa, together with the abundance of several other macroalgae species, which could be identified using the ROV images after validation through specimen identification. Furthermore, in order to allow future uses, such as monitoring the status of colonisation of the invasive algae Caulerpacylindracea, the ROV was sent to some deeper transects on sedimentary habitats (40 m) below the Posidonia meadows lower limits.
CONCLUSIONS: The project, while providing some interesting insights on using a ROV as a tool to study marine biodiversity, generated a dataset for the distribution of 19 macroalgae on both standardised and new transects in the Bay of Calvi (Katz et al. 2021). The observed species of macroalgae included: Acetabulariaacetabulum, Amphiroarigida, Caulerpaprolifera, Caulerpacylindracea, Codiumbursa, Colpomeniasinuosa, Corallinales (order), Cystoseirabrachycarpa, Cystoseiracrinita, Cystoseiraspinosa, Cystoseirazosteroides, Dictyota (genus), Flabelliapetiolata, Halopteris (genus), Halopterisscoparia, Jania (genus), Osmundariavolubilis, Padina pavonica and Peyssonneliasquamaria.The videos also showed that the invasive algae Caulerpacylindracea has spread between 2016 and 2019 and that more focused studies should be held in the Bay to assess the actual reach and possible impacts of this invasion.Finally, our ROV video transects have also underlined the significant presence of particular benthic macroalgae communities over habitat zones described as \"soft-bottom\" on benthic habitat maps. Although the biomass per unit area of these communities is probably lower than for most coastal rocky bottoms, this widely-spread habitat type holds a contribution to primary production to be considered in coastal ecosystem models.