Molecular iodine (I2) emission from two Laminaria species (Phaeophyceae) and impact of irradiance and temperature on I2 emission into air and iodide release into seawater from Laminaria digitata.
Molecular iodine (I2) emission from two Laminaria species (Phaeophyceae) and impact of irradiance and temperature on I2 emission into air and iodide release into seawater from Laminaria digitata.
复制标题
两种海带物种（褐藻纲）的分子碘 (I2) 排放以及辐照度和温度对指状海带 I2 排放到空气中以及碘化物释放到海水中的影响。
DOI：
10.1016/j.marenvres.2013.09.006
复制
发表时间：
2013
影响因子：
3.3
通讯作者：
D. B. Stengel
中科院分区：
文献类型：
--
作者：
U. Nitschke;S. Dixneuf;A. Ruth;M. Schmid;D. B. Stengel
海带属海带具有高浓度的碘积累能力，但其保留碘的能力会受到浸渍和生理胁迫的影响。本研究比较了在控制的低辐照度和低温度条件下，数字海带（laminaria digitatata）和北纬海带（laminaria hyperborea）向大气中排放的i2。两种植物作为叶片的i2排放速率不同。数字化排放的二氧化碳比新生长的叶片（当前生长季节）高出5倍。hyperborea。旧叶片（以前的生长季节）未检测到i2排放。hyperborea。此外，辐照度和温度对大气中i2排放和海水中净I -释放的影响。数字化同时监测光生理参数作为应激指标。30 ~ 120 μmol光子m−2s−1的辐照度对i2发射和I−释放率均有轻微影响，但通过光抑制可以观察到生理应激。结果表明，这里施加的辐照压力不足以影响碘的释放。相比之下，在高温下（20°C），光抑制伴随着i2释放率的增加，但在10-20°C时，净I -释放率保持相似。从ml观测到高的向空气排放和向海水释放I -的速率。数字支持这种海带作为沿海碘通量介质的基本功能。
Kelps of the genusLaminariaaccumulate iodine at high concentrations, but the iodine retaining capacity can be affected by emersion and physiological stress. In this study, I2emission into the atmosphere fromLaminaria digitataandLaminaria hyperboreawas compared under controlled low irradiances and temperatures. The two species exhibited different I2emission rates as blades ofL. digitataemitted I2at rates five times higher than those from newly-grown blades (current growth season) ofL. hyperborea. I2emission was not detectable from old blades (previous growth season) ofL. hyperborea. Additionally, effects of irradiance and temperature on both I2emission into air and net I−release into seawater where assessed forL. digitatawhile monitoring photo-physiological parameters as stress indicators. Irradiances between 30 and 120 μmol photons m−2s−1had only marginal effects on both I2emission and I−release rates, but physiological stress, indicated by photoinhibition, was observed. The results suggest that the irradiances applied here were not stressful enough to impact on the iodine release. By contrast, at elevated temperatures (20 °C), photoinhibition was accompanied by an increase in I2emission rates, but net I−release rates remained similar at 10–20 °C. High I2emission rates into air and I−release into seawater observed fromL. digitataunderpin the fundamental function of this kelp as mediator of coastal iodine fluxes.
DOI：
10.5194/acpd-9-26329-2009
发表时间：
2009
期刊：
--
影响因子：
--
作者：
Ball S
通讯作者：
Ball S
影响因子：
2
作者：
Bale, Catherine S. E.;Ingham, Trevor;Bloss, William J.
通讯作者：
Bloss, William J.