Molecular composition and biodegradation of loggerhead sponge Spheciospongia vesparium exhalent dissolved organic matter
Molecular composition and biodegradation of loggerhead sponge Spheciospongia vesparium exhalent dissolved organic matter
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红海绵Spheciospongia vesparium呼出溶解有机物的分子组成及生物降解
DOI：
10.1016/j.marenvres.2020.105130
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发表时间：
2020
影响因子：
3.3
通讯作者：
Medeiros, Patricia M.
中科院分区：
文献类型：
--
作者：
Letourneau, Maria L.;Hopkinson, Brian M.;Fitt, William K.;Medeiros, Patricia M.
海绵是海洋生物礁的重要组成部分，因为它们具有高过滤能力，丰富度和生物地球化学循环的改变。在这里，我们的特点是溶解有机物（DOM）组成的海绵holobiont呼出海水的红海龟海绵（Spheciospongia vesparium）和周围海水中的佛罗里达湾（美国），以及微生物的反应，每个DOM池通过暗孵育。海绵holobiont去除6%的海水溶解的有机碳（DOC），利用低的碳和氧的化合物，但相对于环境海水的氮含量高。微生物群落在5天的培养期间从环境海水中获得7%的DOC，但从海绵呼出海水中仅获得1%的DOC，这表明不稳定性的降低可能是由于全生物去除富氮化合物。如果这也适用于其他海绵，它可能有重要的影响DOM不稳定性和沿海环境中的循环。
Sponges are critical components of marine reefs due to their high filtering capacity, wide abundance, and alteration of biogeochemical cycling. Here, we characterized dissolved organic matter (DOM) composition in the sponge holobiont exhalent seawater of a loggerhead sponge (Spheciospongia vesparium) and in ambient seawater in Florida Bay (USA), as well as the microbial responses to each DOM pool through dark incubations. The sponge holobiont removed 6% of the seawater dissolved organic carbon (DOC), utilizing compounds that were low in carbon and oxygen, yet high in nitrogen content relative to the ambient seawater. The microbial community accessed 7% of DOC from the ambient seawater during a 5-day incubation but only 1% of DOC from the sponge exhalent seawater, suggesting a decrease in lability possibly due to holobiont removal of nitrogen-rich compounds. If this holds true for other sponges, it may have important implications for DOM lability and cycling in coastal environments.