当前位置: X-MOL 学术Mar. Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Intertidal mussel reefs change the composition and size distribution of diatoms in the biofilm
Marine Biology ( IF 2.4 ) Pub Date : 2021-02-04 , DOI: 10.1007/s00227-020-03819-2
Rosyta Andriana , Friederike G. Engel , Joao B. Gusmao , Britas Klemens Eriksson

Migrating diatoms are microscopic ecosystem engineering organisms that have functional consequences on the seascape scale by significantly contributing to the microphytobenthos biofilm. The microphytobenthos biofilm is a thin photosynthesising layer that covers the sediment on intertidal flats. It fuels the food web, increases sediment stability, and enhances the deposition of particles, providing ecosystem services to coastal communities. Here we tested the effect of another ecosystem engineering habitat, intertidal blue mussel reefs, on the composition and properties of migrating diatom communities. Small-scale reefs constructed in the intertidal mimicked and reinforced the natural pattern in diatom community composition and function that we documented in the field. The field experiment adding small reefs to the intertidal ran from 30 April to 10 June 2015 and the field samples were collected around a natural blue mussel bed on the same tidal flat on 7 October 2015 (N 53.489°, E 6.230°). Both the constructed small-scale reefs and the natural reef changed the community composition of diatoms in the biofilm by promoting higher numbers of smaller-sized cells and species. Small diatoms have higher growth and gross photosynthesis rates, indicating that this explains the higher production and chlorophyll-a concentration of the biofilm measured on natural intertidal shellfish reefs. Our results showed that shellfish reefs have a large impact on biofilm functioning. However, biofilms are also fuel for the shellfish, indicating that the two very different ecosystem engineers may facilitate coexistence on tidal flats through a positive feedback loop.



中文翻译:

潮间带贻贝礁改变了生物膜中硅藻的组成和大小分布

迁移的硅藻是微观的生态系统工程生物,通过显着促进微底栖生物膜的形成,在海景尺度上产生功能性后果。微型底栖生物膜是薄的光合作用层,覆盖潮间带的沉积物。它为食物网提供燃料,增加沉积物的稳定性,并增加颗粒的沉积,为沿海社区提供生态系统服务。在这里,我们测试了另一个生态系统工程栖息地潮间带蓝贻贝礁对迁移的硅藻群落的组成和性质的影响。在潮间带建造的小礁石模仿并加强了我们在野外记录的硅藻群落组成和功能的自然格局。2015年4月30日至6月10日,在潮间带进行了小礁石的野外试验,并于2015年10月7日在同一潮汐滩(N 53.489°,E 6.230°)周围的天然蓝贻贝床周围采集了野外样品。人工建造的小规模礁石和天然礁石都通过促进更多数量的小型细胞和物种改变了生物膜中硅藻的群落组成。小硅藻具有更高的生长和总体光合作用速率,表明这解释了在天然潮间贝类礁石上测得的生物膜的产量和叶绿素a浓度较高。我们的结果表明,贝类礁对生物膜功能有很大影响。但是,生物膜也是贝类的燃料,

更新日期:2021-02-04
down
wechat
bug