2021 State of the Environment Report Marine Chapter – Expert Assessment – State and Trend – Deep seabed (>700m)

《2021年环境状况报告(SOE)》的海洋章节包含了从海洋数据流开发的多个专家模板。这一元数据记录描述了专家评估“深海海底(700米)的状况和趋势”。<br/> *完整的专家评估PDF，包括数字和表格(如果提供)，可在本记录的“在线资源”部分下载，名称为“专家评估2021-深海海底(&gt；700m)”*<br/> <br/> <br/> 用于专家评估的栖息地/社区说明<br/> 这个特定的深度范围(&gt；700米)聚集了几个在地质、环境和生物特征上明显不同的栖息地和群落：大陆中部斜坡、较低的斜坡和隆起以及深渊。自2016年评估以来，由于最近在大澳大利亚湾和东澳大利亚边缘进行的调查工作，我们对澳大利亚周围非常深海栖息地的了解大幅增加(Williams等人)。2018a，b；O‘Hara等人。2020a，b)。例如，后者的斜坡地形被证明比最初预期的更加复杂和崎岖(O‘Hara等人)。2020b)，这意味着栖息地具有更高的多样性，并为更多样化的动物群组合提供了机会。<br/> <br/> 数据流(S)在专家评估中的应用<br/> 与调查有关的元数据记录可在Marlin(http://www.marine.csiro.au/marlin/search.html)；和CSIRO数据拖网渔船上找到(https://www.marine.csiro.au/data/trawler/)参考标明用于有效搜索数据库的调查名称<br/> <br/> <br/> 2021年国企评估总结[详见所附专家评估报告]<br/> <br/> ·2021年·<br/> 考核等级：良好<br/> 评估趋势：稳定<br/> 置信度：证据有限；气候影响不确定<br/> 信心趋势：证据有限；气候影响不确定<br/> 可比性：等级和趋势与2016年的评估相当<br/> ·2016年·<br/> 考核等级：良好<br/> 评估趋势：稳定<br/> 可信度：证据有限或共识有限<br/> 信心趋势：证据有限或共识有限<br/> 可比性：等级和趋势与2011年评估相当<br/> ·2011年·<br/> 考核等级：非常好<br/> 评估趋势：稳定<br/> 可信度：证据有限或共识有限<br/> 信心趋势：证据有限或共识有限<br/> <br/> <br/> 2016年国企考核以来的变化<br/> 未提供

The Marine chapter of the 2021 State of the Environment (SoE) report incorporates multiple expert templates developed from streams of marine data. This metadata record describes the Expert Assessment "State and Trend of Deep seabed (&gt;700m)". <br /> ***A PDF of the full Expert Assessment, including figures and tables (where provided) is downloadable in the "On-line Resources" section of this record as "EXPERT ASSESSMENT 2021 - Deep seabed (&gt;700m)"***<br /> <br /> ----------------------------------------<br /> <br /> DESCRIPTION OF HABITAT/COMMUNITY FOR EXPERT ASSESSMENT<br /> This specified depth range (&gt; 700 m) aggregates several habitats and communities that are clearly distinct in geological, environmental and biological characteristics: the mid-continental slope, lower slope and rise, and abyss. Our knowledge of very deep-sea habitats around Australia has increased substantially since the 2016 assessment due to recent survey effort in the Great Australian Bight and off the Eastern Australian Margin (Williams et al. 2018a, b; O’Hara et al. 2020a, b). For example, the slope topography of the latter was shown to be more complex and rugged than originally expected (O’Hara et al. 2020b), which suggests a higher diversity of habitats, and by implication opportunity for more diverse faunal assemblages.<br /> <br /> DATA STREAM(S) USED IN EXPERT ASSESSMENT<br /> Metadata records related to surveys can be found on MarLIN (http://www.marine.csiro.au/marlin/search.html); and on the CSIRO Data trawler (https://www.marine.csiro.au/data/trawler/) the reference indicates Survey names for effectively searching the databases<br /> <br /> ----------------------------------------<br /> <br /> 2021 SOE ASSESSMENT SUMMARY [see attached Expert Assessment for full details]<br /> <br /> • 2021 •<br /> Assessment grade: Good<br /> Assessment trend: Stable<br /> Confidence grade: Limited evidence; uncertain climate effects<br /> Confidence trend: Limited evidence; uncertain climate effects<br /> Comparability: Grade and trend are comparable to the 2016 assessment<br /> • 2016 •<br /> Assessment grade: Good<br /> Assessment trend: Stable<br /> Confidence grade: Limited evidence or limited consensus<br /> Confidence trend: Limited evidence or limited consensus<br /> Comparability: Grade and trend are comparable to the 2011 assessment<br /> • 2011 •<br /> Assessment grade: Very good<br /> Assessment trend: Stable<br /> Confidence grade: Limited evidence or limited consensus<br /> Confidence trend: Limited evidence or limited consensus<br /> <br /> ----------------------------------------<br /> <br /> CHANGES SINCE 2016 SOE ASSESSMENT<br /> not supplied