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The polychaete, Paraprionospio pinnata, is a likely vector of domoic acid to the benthic food web in the northern Gulf of Mexico
Harmful Algae ( IF 6.6 ) Pub Date : 2018-07-04 , DOI: 10.1016/j.hal.2018.06.002
Melissa M. Baustian , Sibel Bargu , Wendy Morrison , Chelsea Sexton , Nancy N. Rabalais

A somewhat disparate, yet temporally cohesive, set of phytoplankton abundance, microphytobenthos, including the diatom Pseudo-nitzschia, benthic infauna, and sediment toxin data were used to develop a theory for the transfer of domoic acid (DA) from the toxic diatom to the benthos in the highly productive waters of the northern Gulf of Mexico near the Mississippi River plume. Archived samples and new data were used to test the theory that DA is likely to be incorporated into benthic consumers. High spring abundances of potentially toxic Pseudo-nitzschia diatoms were simultaneously present in the surface waters, bottom waters and on the seafloor. Examination of the gut contents of a typical deposit-feeding and suspension-feeding polychaete, Paraprionospio pinnata, during similar periods of high Pseudo-nitzschia abundance in surface water indicated consumption of the diatoms. Demersal fishes, particularly Atlantic croaker, are known to consume these polychaetes, with a potential for transfer of DA to even higher trophic levels. These findings warrant a theory to be tested with further studies about the trophic linkage of a phytoplankton toxin into the benthic food web.



中文翻译:

这种多毛类动物Paraprionospio pinnata可能是海藻酸向墨西哥湾北部底栖食物网的传播媒介

浮游植物丰度,微藻类底栖动物(包括硅藻假生尼兹菌,底栖动物和沉积物毒素数据)在某种程度上是完全不同但在时间上具有凝聚力的集合,用于为从有毒硅藻到藻类的多巴酸(DA)转移建立理论。在墨西哥湾北部密西西比河羽流附近高产水域中的便当。已归档的样本和新数据被用来检验DA可能会被整合到底层消费者中的理论。在地表水,底水和海底同时存在大量潜在有毒的拟南芥硅藻。检验典型的以沉积物为食和以悬浮物为食的多毛cha(Paraprionospio pinnata)的肠道成分在相似的高假性奈瑟菌地表水时期,表明硅藻的消耗。众所周知,海底鱼类,特别是大西洋黄花鱼会消耗这些多毛鱼类,有可能将DA转移到更高的营养水平。这些发现为进一步研究浮游植物毒素与底栖食物网之间的营养联系提供了理论依据。

更新日期:2018-07-04
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