加勒比珊瑚礁上内生海绵产生的细粒沉积物

IF 3.8 1区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Pub Date : 2024-07-24 DOI:10.1002/lno.12640
Didier M. de Bakker, Chris T. Perry, Eden Magaña-Gallegos, Esmeralda Pérez-Cervantes, Lorenzo Alvarez-Filip
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引用次数: 0

摘要

内生海绵是珊瑚礁系统碳酸盐循环的关键角色。虽然对其生物侵蚀珊瑚礁框架的研究相对较多,但对其在生物沉积物生成中的作用却知之甚少。在这项研究中,对加勒比海八个内石海绵物种的沉积属性和生成率进行了描述。研究结果表明,不同物种的沉积物生成率(范围:1.0-6.3 千克 CaCO3 m-2 yr-1)存在显著差异,而沉积物特征(模态大小从 39 微米到 48 微米不等)则保持一致。在墨西哥加勒比海的 50 个珊瑚礁地点,利用物种特异性速率探讨了珊瑚礁尺度上海绵沉积物生成的变化。观察到不同地点之间存在显著差异,估计年沉积物生成量从 0.01 到 0.84 kg m-2 不等。生产量主要由海绵丰度驱动,不同物种的贡献存在明显的空间差异,这可能与当地环境条件的变化有关。这些沉积物生产者可以快速利用死亡的珊瑚基质,再加上它们对不断变化的海洋环境的积极反应,凸显了这些海绵在现代退化的加勒比海珊瑚礁系统中日益增长的重要性。
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Fine-grained sediment production by endolithic sponges on Caribbean coral reefs

Endolithic sponges are key players in carbonate cycling on coral reef systems. While their bioerosion of reef framework is relatively well studied, their role in biogenic sediment generation is poorly understood. In this study, the sedimentary attributes and production rates of eight Caribbean endolithic sponge species were characterized. The findings revealed notable species-specific variations in sediment production rates (range: 1.0–6.3 kg CaCO3 m−2 yr−1), alongside consistency in sediment characteristics (modal sizes ranging from 39 to 48 μm). The species-specific rates were used to explore reef-scale variations in sponge-derived sediment generation across 50 reef sites in the Mexican Caribbean. Significant between-site variability was observed, with estimated annual sediment production ranging from < 0.01 to 0.84 kg m−2 of reef. Production was primarily driven by sponge abundance, with discernible spatial variations in the contributions of different species, which could be related to variability in local environmental conditions. The rapidity at which these sediment producers can utilize dead coral substrates, coupled with their positive response to the changing marine environment, highlights the growing importance of these sponges in modern degraded Caribbean reef systems.

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来源期刊
Limnology and Oceanography
Limnology and Oceanography 地学-海洋学
CiteScore
8.80
自引率
6.70%
发文量
254
审稿时长
3 months
期刊介绍: Limnology and Oceanography (L&O; print ISSN 0024-3590, online ISSN 1939-5590) publishes original articles, including scholarly reviews, about all aspects of limnology and oceanography. The journal''s unifying theme is the understanding of aquatic systems. Submissions are judged on the originality of their data, interpretations, and ideas, and on the degree to which they can be generalized beyond the particular aquatic system examined. Laboratory and modeling studies must demonstrate relevance to field environments; typically this means that they are bolstered by substantial "real-world" data. Few purely theoretical or purely empirical papers are accepted for review.
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