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DOI:	10.1371/journal.pone.0134236
论文题名:	Effects of Bioadvection by Arenicola marina on Microphytobenthos in Permeable Sediments
作者:	Arjun Chennu; Nils Volkenborn; Dirk de Beer; David S. Wethey; Sarah A. Woodin; Lubos Polerecky
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2015
发表日期:	2015-7-31
卷:	10, 期:7
语种:	英语
英文关键词:	Sediment ; Biomass (ecology) ; Biological transport ; Chlorophyll ; Advection ; Ecosystem engineering ; Ultracentrifugation ; Sea water
英文摘要:	We used hyperspectral imaging to study short-term effects of bioturbation by lugworms (Arenicola marina) on the surficial biomass of microphytobenthos (MPB) in permeable marine sediments. Within days to weeks after the addition of a lugworm to a homogenized and recomposed sediment, the average surficial MPB biomass and its spatial heterogeneity were, respectively, 150-250% and 280% higher than in sediments without lugworms. The surficial sediment area impacted by a single medium-sized lugworm (~4 g wet weight) over this time-scale was at least 340 cm2. While sediment reworking was the primary cause of the increased spatial heterogeneity, experiments with lugworm-mimics together with modeling showed that bioadvective porewater transport from depth to the sediment surface, as induced by the lugworm ventilating its burrow, was the main cause of the increased surficial MPB biomass. Although direct measurements of nutrient fluxes are lacking, our present data show that enhanced advective supply of nutrients from deeper sediment layers induced by faunal ventilation is an important mechanism that fuels high primary productivity at the surface of permeable sediments even though these systems are generally characterized by low standing stocks of nutrients and organic material.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0134236&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/22086
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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journal.pone.0134236.PDF（4844KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

Max Planck Institute for Marine Microbiology, Bremen, Germany;Department of Biological Sciences, University of South Carolina, Columbia, United States of America;Max Planck Institute for Marine Microbiology, Bremen, Germany;Department of Biological Sciences, University of South Carolina, Columbia, United States of America;Department of Biological Sciences, University of South Carolina, Columbia, United States of America;Max Planck Institute for Marine Microbiology, Bremen, Germany

Recommended Citation:

Arjun Chennu,Nils Volkenborn,Dirk de Beer,et al. Effects of Bioadvection by Arenicola marina on Microphytobenthos in Permeable Sediments[J]. PLOS ONE,2015-01-01,10(7)

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