Exploring the hidden shallows: inner-shelf reef growth and future trajectories of reef geomorphic change

探索隐藏的浅滩：内陆架珊瑚礁的生长和珊瑚礁地貌变化的未来轨迹

• 批准号: NE/J023329/1
• 负责人: Christopher Perry
• 金额: $ 51.77万
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2012
• 资助国家: 英国
• 起止时间: 2012 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FJ023329%2F1
• 关键词: Exploring; hidden; shallows; inner; shelf

Regional-scale deteriorations in coral cover and reef architectural complexity, driven by a suite of environmental and climate-change related disturbances, have been documented, with the scale of global reef ecosystem change such that a cessation of reef accretion has been argued by many as the ultimate and imminent trajectory. One of the most pressing and fundamental challenges in coral reef science is thus to project the future for coral reefs under rapidly changing climatic and environmental conditions. Responses will likely vary region by region, and reef by reef, but will ultimately be determined by two basic sets of factors: 1) the ecology (and ecological responses to environmental change) of the key carbonate producers and eroders on a reef, because these interact to determine whether a reef has the potential to add new carbonate to its structure; and 2) the geomorphic evolutionary state and future growth potential of that reef as a function of its past growth history relative to sea level. Whilst there is an expansive and rapidly growing body of data on local and regional spatial scale contemporary ecological processes to inform this debate, there is a remarkable paucity of data on the age, growth history and morphogenetic evolutionary state of the reef structures on which these contemporary processes operate. Indeed, a review of the literature suggests that data on Holocene coral reef accretion rates (as a measure of net vertical reef growth over time) exists for something well below 1% of the World's coral reefs. This represents a major limitation in any attempts to project future rates of reef growth (and thus geomorphic change), and inherently inhibits attempts to integrate data on past rates and timescales of reef growth (at the individual reef scale) into assessments of future ecological states, and thus into management decision-making. For example, if a reef has been at sea level for the past several 100's to 1000's of years, and exists in an essentially senescent evolutionary state (a 'senile' state: sensu Hopley 1982), not only will its current habitat diversity be restricted but its immediate growth potential and its potential for sustained future growth will be severely impaired. The implications of this are clear - that the best informed management plans should integrate knowledge not only of contemporary reef ecology and habitat types but also, as a predictor of future potential geomorphic performance, an understanding of past and potential reef growth rates and of the current geomorphic evolutionary state of a reef. To address this issue, inclusive datasets are needed that can inform our understanding of: 1) when different reefs within individual regions started to grow; 2) how fast they accreted in different settings; 3) which reefs have been most actively accreting in the very recent past; and 4) which reefs, as a function of their current geomorphic state, have the greatest potential for further accretion in the future. The primary goal of this project is thus to address one part of the future reef trajectory challenge - the relevance and role of past geomorphic performance and of current reef evolutionary state as a predictor of future reef accretion potential. This has direct long-term management relevance because contemporary reef morphology is one of the key contributing factors that influences future morphology and thus the characteristics and diversity of reef habitats. Specifically, the project will develop new, spatially inclusive reef accretion and evolutionary state datasets - taking as a case site the inner-shelf regions of Australia's Great Barrier Reef. Whilst regionally focused, the work has global scale relevance because of the implications for understanding the links between reef growth histories, contemporary ecological states and future habitat complexity.

已经记录了由一系列环境和气候变化相关的干扰驱动的珊瑚覆盖和珊瑚礁建筑复杂性的区域尺度恶化，并随着全球珊瑚礁生态系统变化的规模，使许多人认为珊瑚礁积聚的规模被许多人认为是最终的和即将发生的轨迹。因此，在迅速变化的气候和环境条件下，珊瑚礁珊瑚礁最紧迫，最根本的挑战之一是为珊瑚礁的未来投影。响应可能会按地区和礁石划分的区域变化，但最终将取决于两个基本因素：1）关键碳酸盐生产者和礁石上的生态学（以及对环境变化的生态反应），因为这些礁石相互作用以确定礁是否有可能向其结构添加新的碳酸盐； 2）该珊瑚礁的地貌进化状态和未来的增长潜力是其过去增长历史相对于海平面的函数。尽管在当代和区域空间规模的当代生态过程中存在广泛且迅速增长的数据，以告知这一辩论，但关于这些当代过程在礁石结构的年龄，增长历史和形态发生进化状态的数据存在显着的数据。的确，对文献的综述表明，关于全新的珊瑚礁增生率的数据（随着时间的推移，净垂直礁的量）的数据远低于世界珊瑚礁的1％。这是任何试图将未来礁石增长率（从而使地貌变化）投射出来的任何尝试的主要局限性，并且固有地抑制了将有关过去率和时间表的数据整合到对未来生态状态的评估，从而将数据整合到对管理决策的未来生态状态的评估中。例如，如果礁石在过去的几十到1000年中一直处于海平面状态，并且存在于本质上是衰老的进化状态（一个“老年”状态：Sensu Hopley 1982），则不仅会限制其当前的栖息地多样性，而且会受到持续增长的直接增长及其对未来增长的潜力。这一点的含义是明确的 - 最好的知情管理计划不仅应整合当代礁生态和栖息地类型的知识，而且还应将对未来潜在的地貌表现的预测指标，对过去和潜在的珊瑚礁增长率以及当前礁石的地貌进化状态的理解。为了解决这个问题，需要包容性数据集，以告知我们对我们的理解：1）何时各个区域内的不同礁石开始增长； 2）他们在不同的设置中积聚的速度； 3）在最近的过去，哪些礁石最积极地积聚； 4）礁石作为其当前的地貌状态的函数，将来具有进一步积聚的最大潜力。因此，该项目的主要目标是解决未来礁石轨迹挑战的一部分 - 过去的地貌性能和当前珊瑚礁进化状态的相关性和作用，以预测未来的珊瑚礁积聚潜力。这具有直接的长期管理相关性，因为当代礁石的形态是影响未来形态以及礁栖息地的特征和多样性的关键因素之一。具体而言，该项目将开发新的，空间包含的礁石积聚和进化状态数据集 - 作为案例现场，澳大利亚大障碍礁的内架地区。尽管以区域为重点，但这项工作具有全球相关性，因为对了解珊瑚礁增长历史，当代生态状态与未来栖息地复杂性之间的联系有影响。

项目成果

Supplementary Materials from Projections of coral cover and habitat change on turbid reefs under future sea-level rise

未来海平面上升下浑浊礁石珊瑚覆盖和生境变化预测的补充材料

• DOI: 10.6084/m9.figshare.12416978
• 发表时间: 2020
• 作者: Morgan K

Evidence of extensive reef development and high coral cover in nearshore environments: implications for understanding coral adaptation in turbid settings.

• DOI: 10.1038/srep29616
• 发表时间: 2016-07-19
• 期刊: Scientific reports
• 影响因子: 4.6
• 作者: Morgan KM;Perry CT;Smithers SG;Johnson JA;Daniell JJ
• 通讯作者: Daniell JJ

Nearshore Turbid-Zone Corals Exhibit High Bleaching Tolerance on the Great Barrier Reef Following the 2016 Ocean Warming Event

• DOI: 10.3389/fmars.2017.00224
• 发表时间: 2017-07
• 期刊: Frontiers in Marine Science
• 影响因子: 3.7
• 作者: K. Morgan;C. Perry;J. Johnson;S. Smithers

Transitions in coral reef accretion rates linked to intrinsic ecological shifts on turbid-zone nearshore reefs

珊瑚礁增生率的转变与浑浊带近岸珊瑚礁的内在生态变化有关

• DOI: 10.1130/g38610.1
• 发表时间: 2016
• 期刊: Geology
• 影响因子: 5.8
• 作者: Morgan K

Reef shallowing is a critical control on benthic foraminiferal assemblage composition on nearshore turbid coral reefs

• DOI: 10.1016/j.palaeo.2019.109240
• 发表时间: 2019-11
• 期刊: Palaeogeography, Palaeoclimatology, Palaeoecology
• 作者: J. Johnson;C. Perry;S. Smithers;K. Morgan;S. Woodroffe