結(jié)論

本研究中的 N2O 通量表明，潮間帶沉積物表現(xiàn)出顯著的 N2O 吸收，以響應(yīng)養(yǎng)分可用性的潮汐脈沖變化。低潮使沉積物暴露在大氣中時營養(yǎng)物質(zhì)耗盡。N 轉(zhuǎn)化細(xì)菌和古細(xì)菌必須與底棲微藻競爭這些有限的資源。在陽光充足的條件下，反硝化劑可能會被微藻競爭硝酸鹽，但也可能使用 N2O 作為終端電子受體（Miller 等人，1986 年），從而驅(qū)動低潮時 N2O 吸收的信號。采取的措施來自營養(yǎng)富集核心的 N2Ofluxes 對 DIN 和 DINtDIP 添加最敏感，并且這些沉積物中通過反硝化作用吸收的 N2O 受到 P 限制。 N2O?？偟膩碚f，我們觀察到這個潮灘生態(tài)系統(tǒng)在夏季是一個 N2O 匯，與相鄰的鹽沼處于同一數(shù)量級。 從大氣中去除這種強(qiáng)效溫室氣體是發(fā)生在通常被認(rèn)為是大氣中 N2O 來源的生態(tài)系統(tǒng)中的一項(xiàng)關(guān)鍵生態(tài)系統(tǒng)服務(wù)。

致謝

我們非常感謝美國國家科學(xué)基金會，它通過資助 S.Fagherazzi、RWFulweiler 和 D.Fitzgerald（NSF OCE 0924287）以及 L.Deegan（NSF OCE 0923689）在生物地球化學(xué)的新興主題中為該項(xiàng)目提供資金.我們還要感謝波士頓大學(xué)，它通過 Mary Erskine Type II 贈款為 RWFulweiler 提供了額外的資金。另外感謝 NSF 對梅島河口長期生態(tài)研究 (LTER) 站點(diǎn) (NSF OCE 0423565) 的支持，其中這項(xiàng)工作發(fā)生了，非常感謝使用 Plum Island LTER 站點(diǎn)的設(shè)施，這使這項(xiàng)工作成為可能。此外，我們感謝 Sarabeth Buckley、Taylor O'Leary、Katie Pritchard 和 Sarah Donovan forfield 和實(shí)驗(yàn)室協(xié)助。我們感謝Pam Templar 和 Sergio Fagherazzi 對早期版本手稿的有益評論。我們非常感謝 Unisense,DK 的 Anne Bolvig S?rensen 和 Lars Hauer Larsen 的幫助，他們提供微傳感器支持和 Peter Ber g 用于 PROFILE 模型支持。

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潮汐脈沖對于溫和潮間帶泥灘中一氧化二氮通量改變的研究——摘要、介紹

潮汐脈沖對于溫和潮間帶泥灘中一氧化二氮通量改變的研究——方法、數(shù)據(jù)分析

潮汐脈沖對于溫和潮間帶泥灘中一氧化二氮通量改變的研究——結(jié)果

潮汐脈沖對于溫和潮間帶泥灘中一氧化二氮通量改變的研究——討論

潮汐脈沖對于溫和潮間帶泥灘中一氧化二氮通量改變的研究——結(jié)論、致謝！