Effect of Anthropogenic Aerosol Addition on Phytoplankton Growth in Coastal Waters: Role of Enhanced Phosphorus Bioavailability.
Effect of Anthropogenic Aerosol Addition on Phytoplankton Growth in Coastal Waters: Role of Enhanced Phosphorus Bioavailability.
复制标题
人为气溶胶添加对沿海水域浮游植物生长的影响：增强磷生物利用率的作用
DOI：
10.3389/fmicb.2022.915255
复制
发表时间：
2022
影响因子：
5.2
通讯作者：
中科院分区：
文献类型：
--
作者：
大气沉积可以提供营养物质，以诱导上层海洋中不同大小的浮游植物做出不同的反应。在这里，我们采集了黄海和东中国海的表层和次表层最大叶绿素a(SCM)海水，进行了一系列船上培养实验，旨在探讨人为气溶胶(AR，取自中国北部沿海城市青岛)添加(未过滤海水)和不添加(过滤海水，FS)微米(20-200μm)细胞对浮游植物生长的影响。结果表明，AR对浮游植物的生长有明显的促进作用，表层培养的叶绿素a(Chla)对浮游植物生长有明显的促进作用，而SCM培养的AR对浮游植物的生长有促进作用或无促进作用，这与海水中的营养物质状态有关。AR处理的氮磷比高，说明P成为土壤的主要限制养分。反映溶解有机磷(DOP)转化为溶解无机磷的速率的碱性磷酸酶(APA)活性(APA)是对照的1.3~75.5倍，表明AR的添加提高了海水中磷的生物有效性。能够利用DOP的甲藻在AR处理中表现出优势生长，与浮游植物大小结构向更大的细胞转移相对应。令人惊讶的是，我们发现超滤膜中纳米级(2-20μm)和微微级(0.2-2μm)Chla的浓度普遍高于FS。UFS的APA至少是FS的1.6倍，并与微米级细胞对总Chla的贡献成正比，表明微米级细胞在APA增加中起着重要作用，有助于纳米级和微微级浮游植物的生长。目前的工作对大气沉积引起的磷的生物有效性增加以及由此产生的沿海水域的生态效应提供了新的见解。
Atmospheric deposition can supply nutrients to induce varying responses of phytoplankton of different sizes in the upper ocean. Here, we collected surface and subsurface chlorophyll a maximum (SCM) seawaters from the Yellow Sea and East China Sea to conduct a series of onboard incubation experiments, aiming to explore the impact of anthropogenic aerosol (AR, sampled in Qingdao, a coastal city in Northern China) addition on phytoplankton growth using schemes with (unfiltered seawater, UFS) and without (filtered seawater, FS) microsized (20–200 μm) cells. We found that AR addition stimulated phytoplankton growth obviously, as indicated by chlorophyll a (Chl a) in surface incubations, and had stimulatory or no effects in SCM incubations, which was related to nutrient statuses in seawater. The high ratio of nitrogen (N) to phosphorus (P) in the AR treatments demonstrated that P became the primary limiting nutrient. The alkaline phosphatase activity (APA), which can reflect the rate at which dissolved organic P (DOP) is converted into dissolved inorganic P, was 1.3–75.5 times higher in the AR treatments than in the control, suggesting that AR addition increased P bioavailability in the incubated seawater. Dinoflagellates with the capacity to utilize DOP showed the dominant growth in the AR treatments, corresponding to the shift in phytoplankton size structure toward larger cells. Surprisingly, we found that nanosized (2–20 μm) and picosized (0.2–2 μm) Chl a concentrations in UFS were generally higher than those in FS. The APA in UFS was at least 1.6 times higher than in FS and was proportional to the contribution of microsized cells to the total Chl a, suggesting that microsized cells play an important role in the increase in APA, which contributes to the growth of nanosized and picosized phytoplankton. Current work provides new insight into the increase of P bioavailability induced by atmospheric deposition and resultant ecological effect in coastal waters.
登录
查看更多内容
影响因子：
48
作者：
Callahan BJ;McMurdie PJ;Rosen MJ;Han AW;Johnson AJ;Holmes SP
通讯作者：
Holmes SP
DOI：
10.1073/pnas.1900125116
发表时间：
2019-04-30
影响因子：
11.1
作者：
An, Zhisheng;Huang, Ru-Jin;Ji, Yuemeng
通讯作者：
Ji, Yuemeng
影响因子：
2.1
作者：
Fujiki, T;Taguchi, S
通讯作者：
Taguchi, S
大陆有机气溶胶对东海海洋大气的影响：来自脂质、多环芳烃和邻苯二甲酸盐的见解。
影响因子：
9.8
作者：
Kang, Mingjie;Yang, Fan;Fu, Pingqing
通讯作者：
Fu, Pingqing
影响因子：
16.6
作者：
Browning TJ;Achterberg EP;Yong JC;Rapp I;Utermann C;Engel A;Moore CM
通讯作者：
Moore CM