当前位置：
X-MOL 学术
›
Glob. Change Biol.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Marine heatwave‐driven mass mortality and microbial community reorganisation in an ecologically important temperate sponge
Global Change Biology ( IF 10.8 ) Pub Date : 2024-08-06 , DOI: 10.1111/gcb.17417 James J Bell 1 , Valerio Micaroni 1, 2 , Francesca Strano 1, 2 , Ken G Ryan 1 , Katherine Mitchell 3 , Paul Mitchell 3 , Shaun Wilkinson 4 , Torsten Thomas 5 , Ramadian Batchiar 1 , Robert O Smith 6
Global Change Biology ( IF 10.8 ) Pub Date : 2024-08-06 , DOI: 10.1111/gcb.17417 James J Bell 1 , Valerio Micaroni 1, 2 , Francesca Strano 1, 2 , Ken G Ryan 1 , Katherine Mitchell 3 , Paul Mitchell 3 , Shaun Wilkinson 4 , Torsten Thomas 5 , Ramadian Batchiar 1 , Robert O Smith 6
Affiliation
|
Marine heatwaves (MHWs) are increasing in frequency, duration and intensity, disrupting global marine ecosystems. While most reported impacts have been in tropical areas, New Zealand experienced its strongest and longest MHW in 2022, profoundly affecting marine sponges. Sponges are vital to rocky benthic marine communities, with their abundance influencing ecosystem functioning. This study examines the impact of this MHW on the photosynthetic sponge Cymbastella lamellata in Fiordland, New Zealand. We describe the extent, physiological responses, mortality, microbial community changes and ecological impact of this MHW on C. lamellata . The Fiordland MHW reached a maximum temperature of 4.4°C above average, lasting for 259 days. Bleaching occurred in >90% of the C. lamellata Fiordland population. The population size exceeded 66 million from 5 to 25 m, making this the largest bleaching event of its kind ever recorded. We identified the photosynthetic symbiont as a diatom, and bleached sponges had reduced photosynthetic efficiency. Post‐MHW surveys in 2023 found that over 50% of sponges at sampling sites had died but that the remaining sponges had mostly recovered from earlier bleaching. Using a simulated MHW experiment, we found that temperature stress was a driver of necrosis rather than bleaching, despite necrosis only rarely being observed in the field (<2% of sponges). This suggests that bleaching may not be the cause of the mortality directly. We also identified a microbial community shift in surviving sponges, which we propose represents a microbial‐mediated adaptive response to MHWs. We also found that C. lamellata are key contributors of dissolved organic carbon to the water column, with their loss likely impacting ecosystem function. We demonstrate the potential for MHWs to disrupt key marine phyla in temperate regions, highlighting how susceptible temperate sponges globally might be to MHWs.
中文翻译：
海洋热浪导致的大规模死亡和生态重要的温带海绵中的微生物群落重组
海洋热浪 (MHW) 的频率、持续时间和强度不断增加，破坏了全球海洋生态系统。虽然大多数报道的影响都发生在热带地区，但新西兰在 2022 年经历了最强烈、最长的 MHW，对海洋海绵产生了深远影响。海绵对于岩石底栖海洋群落至关重要，其丰富程度影响着生态系统的功能。本研究探讨了 MHW 对光合海绵的影响片状圆星藻在新西兰峡湾地区。我们描述了这种 MHW 对人类的影响程度、生理反应、死亡率、微生物群落变化和生态影响片状 C. lamellata 。 Fiordland MHW 的最高气温比平均水平高出 4.4°C，持续了 259 天。 > 90%以上发生漂白片状 C. lamellata峡湾人口。 5米到25米的种群规模超过6600万，是有记录以来最大规模的白化事件。我们将光合作用共生体确定为硅藻，而漂白的海绵降低了光合作用效率。 2023 年 MHW 调查发现，采样点超过 50% 的海绵已经死亡，但剩余的海绵大部分已从早期的漂白中恢复过来。使用模拟 MHW 实验，我们发现温度应激是坏死而不是漂白的驱动因素，尽管在现场很少观察到坏死（<2 id=39>C. lamellata是水体溶解有机碳的关键贡献者，它们的损失可能会影响生态系统功能。我们证明了 MHW 破坏温带地区主要海洋动物门的潜力，强调了全球温带海绵对 MHW 的脆弱性。
更新日期：2024-08-06
中文翻译：
海洋热浪导致的大规模死亡和生态重要的温带海绵中的微生物群落重组
海洋热浪 (MHW) 的频率、持续时间和强度不断增加，破坏了全球海洋生态系统。虽然大多数报道的影响都发生在热带地区，但新西兰在 2022 年经历了最强烈、最长的 MHW，对海洋海绵产生了深远影响。海绵对于岩石底栖海洋群落至关重要，其丰富程度影响着生态系统的功能。本研究探讨了 MHW 对光合海绵的影响片状圆星藻在新西兰峡湾地区。我们描述了这种 MHW 对人类的影响程度、生理反应、死亡率、微生物群落变化和生态影响片状 C. lamellata 。 Fiordland MHW 的最高气温比平均水平高出 4.4°C，持续了 259 天。 > 90%以上发生漂白片状 C. lamellata峡湾人口。 5米到25米的种群规模超过6600万，是有记录以来最大规模的白化事件。我们将光合作用共生体确定为硅藻，而漂白的海绵降低了光合作用效率。 2023 年 MHW 调查发现，采样点超过 50% 的海绵已经死亡，但剩余的海绵大部分已从早期的漂白中恢复过来。使用模拟 MHW 实验，我们发现温度应激是坏死而不是漂白的驱动因素，尽管在现场很少观察到坏死（<2 id=39>C. lamellata是水体溶解有机碳的关键贡献者，它们的损失可能会影响生态系统功能。我们证明了 MHW 破坏温带地区主要海洋动物门的潜力，强调了全球温带海绵对 MHW 的脆弱性。
京公网安备 11010802027423号