Gonzales Jennifer, Tymon Teresa, Küpper Frithjof C, Edwards Matthew S, Carrano Carl J
Department of Chemistry and Biochemistry, San Diego State University, San Diego, California, United States of America.
Oceanlab, University of Aberdeen, Newburgh, Scotland, United Kingdom.
PLoS One. 2017 Aug 11;12(8):e0180755. doi: 10.1371/journal.pone.0180755. eCollection 2017.
Kelps have a major role in marine and atmospheric iodine cycling in the coastal zone of temperate regions, with potential wide-ranging impacts on ozone destruction in the coastal marine boundary layer. However, little is known about the impact of kelp forests on iodine speciation in coastal sea water. To address this, we examined iodide and iodate concentrations in seawater in and around a giant kelp forest near San Diego, CA, USA, and a nearby site that was not influenced by kelp biology. Our data shows that while both iodide and iodate concentrations remained unchanged during the year at the nearby site, these concentrations changed significantly in and around the kelp forest, and were strongly related to changes in kelp canopy biomass. In particular, iodide reached its highest concentration and iodate reached its lowest concentration during the summer when the kelp canopies were near their maximum, while the opposite pattern was observed during the winter and spring when the kelp canopies were near their minimum. Further, comparisons of these changes with corresponding changes in seawater temperature and wind speed indicated that these relationships were relatively small compared to those with changes in kelp biomass. Together, our data show a strong relationship between kelp biomass and iodine metabolism.
海带在温带地区沿海地带的海洋和大气碘循环中发挥着重要作用，对沿海海洋边界层中的臭氧破坏可能产生广泛影响。然而，关于海带森林对沿海海水中碘形态的影响却知之甚少。为了解决这个问题，我们检测了美国加利福尼亚州圣地亚哥附近一片巨型海带森林及其周边以及一个不受海带生物学影响的附近地点海水中的碘化物和碘酸盐浓度。我们的数据表明，虽然附近地点的碘化物和碘酸盐浓度在一年中保持不变，但海带森林内部及其周边的这些浓度发生了显著变化，并且与海带冠层生物量的变化密切相关。特别是，在夏季海带冠层接近最大值时，碘化物浓度达到最高，碘酸盐浓度达到最低，而在冬季和春季海带冠层接近最小值时则观察到相反的模式。此外，将这些变化与海水温度和风速的相应变化进行比较表明，与海带生物量的变化相比，这些关系相对较小。总之，我们的数据表明海带生物量与碘代谢之间存在密切关系。
