■在2022年内克顿马尔代夫任务期间,我们部署了各种平台(浮潜,遥控车辆和载人潜水器)对浅层(<30米)的生物多样性和组成进行视频调查,在马尔代夫中部和南部环礁中发现的中生(30-150m)和深海(>150m)底栖动物。总的来说,在底栖横断面调查期间收集了约80小时的立体视频片段,随后使用注释软件进行处理,以评估底栖生物多样性和群落组成。这里,我们提供了一个视觉摄影指南,现场识别遇到的珊瑚礁底栖动物,包括珊瑚,生活在马尔代夫近岸栖息地的海绵和其他无脊椎动物。我们希望本识别指南将有助于未来的基于图像的调查或实地工作中的生物观察。
■总共鉴定出283种形态类型,包括那些属于Octocorallia(61),巩膜(57),Porifera(38),Asteroidea(22),Antipatharia(15),Decapoda(13),水生动物(12),Holothuroidea(10),Actiniaria(9),Echinoidea(8),Annelida(6),绿藻植物(5),腹足动物(4),Bivalvia(4),Ascidiacea(3),Crinoidea(3),苔藓虫(2),蓝细菌(2),Zoantharia(2),头足类(1),Ceriantharia(1),Corallimorpharia(1),丁香(1),蛇形(1),红藻(1)和未知类别(1)。在这些中,我们确定了40个物种水平,120属,47到家庭,14命令和子命令,58到类和子类,两个到门,一个是未知的门。这是首次尝试使用水下图像对马尔代夫的中观和深海底栖生物多样性进行分类。
UNASSIGNED: During the 2022 Nekton Maldives Mission, we deployed a variety of platforms (snorkelling, remotely-operated vehicles and manned submersibles) to conduct video surveys of the biodiversity and composition of shallow (< 30 m), mesophotic (30-150 m) and deep-sea (> 150 m) benthos found in the Maldives\' central and southern atolls. In total, ~ 80 hrs of stereo-video footage were collected during the benthic transect surveys, which were subsequently processed using annotation software in order to evaluate benthic biodiversity and community composition. Here, we present a photographic guide for the visual, in situ identification of reef benthos encountered, including corals, sponges and other invertebrates that inhabit Maldives\' nearshore habitats. We hope that this identification guide will aid future imagery-based surveys or observations of organisms during fieldwork.
UNASSIGNED: A total of 283 morphotypes were identified, including those belonging to Octocorallia (61), Scleractinia (57), Porifera (38), Asteroidea (22), Antipatharia (15), Decapoda (13), Hydrozoa (12), Holothuroidea (10), Actiniaria (9), Echinoidea (8), Annelida (6), Chlorophyta (5), Gastropoda (4), Bivalvia (4), Ascidiacea (3), Crinoidea (3), Bryozoa (2), Cyanobacteria (2), Zoantharia (2), Cephalopoda (1), Ceriantharia (1), Corallimorpharia (1), Ctenophora (1), Ophiuroidea (1), Rhodophyta (1) and to an unknown category (1). Out of these, we identified 40 to species level, 120 to genus, 47 to family, 14 to order and suborder, 58 to class and subclass, two to phylum and one was of unknown phylum. This represents the first attempt to catalogue the mesophotic and deep-sea benthic megafaunal diversity in the Maldives using underwater imagery.