Do diatoms dominate benthic production in shallow systems? A case study from a mixed seagrass bed
Do diatoms dominate benthic production in shallow systems? A case study from a mixed seagrass bed
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DOI：
10.1002/lol2.10167
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发表时间：
2020-09-29
影响因子：
7.8
通讯作者：
Krause, Jeffrey W.
中科院分区：
文献类型：
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作者：
Cox, T. Erin;Cebrian, Just;Krause, Jeffrey W.
我们报告了一个评估，以确定硅藻群落生产力和呼吸在沿海底栖生态系统与多个自养生物的贡献。在夏季，开放的沉积物和海草栖息地的核心，收集了从泻湖内的北方墨西哥湾。核心保持在一个室外的mesocosm。锗酸，硅藻细胞分裂的抑制剂，被添加到一半的核心和量化的生产和呼吸。抑制硅藻减少了海草生境内的底栖生物生产力。71-83%的产量可归因于硅藻，这一贡献使底栖系统进入净自养。硅藻生产的贡献，在其他栖息地社区组成部分是更可变的（从0%到86%不等）。研究结果强调了硅藻在海草床中作为生产者的生态重要性，海草在维持生产力中的作用，并推断硅藻在其他水生植被栖息地中可能有类似的贡献。
We report an assessment for determining the contribution by diatoms to community productivity and respiration within a coastal benthic ecosystem with multiple autotrophs. During summer, cores of open sediment and seagrass habitat were collected from a lagoon within the Northern Gulf of Mexico. Cores were maintained in an outdoor mesocosm. Germanic acid, an inhibitor of diatom cell division, was added to half the cores and quantification of production and respiration was done. Inhibition of diatoms reduced benthic productivity within the seagrass habitat. 71-83% production was attributable to diatoms and this contribution moved the benthic system into net autotrophy. Diatom contribution to production in other habitat-community components was more variable (varied from 0% to 86%). Findings underscore the ecological importance of diatoms as producers in seagrass beds, the role of seagrasses inmaintaining productivity, and infer that diatoms may have similar contributions in other aquatic vegetated habitats.