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| DOI | 10.1002/ece3.11100 |
| Intra-colony spatial variance of oxyregulation and hypoxic thresholds for key Acropora coral species | |
| 发表日期 | 2024 |
| ISSN | 2045-7758 |
| 起始页码 | 14 |
| 结束页码 | 3 |
| 卷号 | 14期号:3 |
| 英文摘要 | Oxygen (O-2) availability is essential for healthy coral reef functioning, yet how continued loss of dissolved O-2 via ocean deoxygenation impacts performance of reef building corals remains unclear. Here, we examine how intra-colony spatial geometry of important Great Barrier Reef (GBR) coral species Acropora may influence variation in hypoxic thresholds for upregulation, to better understand capacity to tolerate future reductions in O-2 availability. We first evaluate the application of more streamlined models used to parameterise Hypoxia Response Curve data, models that have been used historically to identify variable oxyregulatory capacity. Using closed-system respirometry to analyse O-2 drawdown rate, we show that a two-parameter model returns similar outputs as previous 12th-order models for descriptive statistics such as the average oxyregulation capacity (T-pos) and the ambient O-2 level at which the coral exerts maximum regulation effort (P-cmax), for diverse Acropora species. Following an experiment to evaluate whether stress induced by coral fragmentation for respirometry affected O-2 drawdown rate, we subsequently identify differences in hypoxic response for the interior and exterior colony locations for the species Acropora abrotanoides, Acropora cf. microphthalma and Acropora elseyi. Average regulation capacity across species was greater (0.78-1.03 +/- SE 0.08) at the colony interior compared with exterior (0.60-0.85 +/- SE 0.08). Moreover, P-cmax occurred at relatively low pO(2) of <30% (+/- 1.24; SE) air saturation for all species, across the colony. When compared against ambient O-2 availability, these factors corresponded to differences in mean intra-colony oxyregulation, suggesting that lower variation in dissolved O-2 corresponds with higher capacity for oxyregulation. Collectively, our data show that intra-colony spatial variation affects coral oxyregulation hypoxic thresholds, potentially driving differences in Acropora oxyregulatory capacity. |
| 英文关键词 | Coral oxyregulator; Coral reefs; Climate change; Hypoxic tolerance; Hypoxia Response Curves; Ocean deoxygenation |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology ; Evolutionary Biology |
| WOS类目 | Ecology ; Evolutionary Biology |
| WOS记录号 | WOS:001180036600001 |
| 来源期刊 | ECOLOGY AND EVOLUTION
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/302365 |
| 作者单位 | University of Technology Sydney; University of Technology Sydney; Australian Institute of Marine Science; University of Copenhagen; King Abdullah University of Science & Technology; King Abdullah University of Science & Technology; University of Technology Sydney |
| 推荐引用方式 GB/T 7714 | . Intra-colony spatial variance of oxyregulation and hypoxic thresholds for key Acropora coral species[J],2024,14(3). |
| APA | (2024).Intra-colony spatial variance of oxyregulation and hypoxic thresholds for key Acropora coral species.ECOLOGY AND EVOLUTION,14(3). |
| MLA | "Intra-colony spatial variance of oxyregulation and hypoxic thresholds for key Acropora coral species".ECOLOGY AND EVOLUTION 14.3(2024). |
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