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DOI: 10.1371/journal.pone.0129894
论文题名:
Assessing the Sulfide Footprint of Mussel Farms with Sediment Profile Imagery: A New Zealand Trial
作者: Peter S. Wilson; Kay Vopel
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2015
发表日期: 2015-6-17
卷: 10, 期:6
语种: 英语
英文关键词: Sediment ; Mussels ; Regression analysis ; Sea water ; Marine environments ; Image analysis ; Marine monitoring ; Sulfides
英文摘要: Growing numbers and increased stocking of marine mussel farms make reliable techniques for environmental effect assessment a priority. Previously, we showed how the color intensity of soft sediment could be used to estimate its acid volatile sulfide (AVS) content, a product of the anaerobic microbial degradation of organic matter deposits. We then proposed to include assessments of the AVS farm footprint in marine farm monitoring, in particular, to investigate temporal changes in the extent of the seafloor area of elevated sediment AVS content. Such assessment requires accurate detection of the AVS footprint boundary. Here, we demonstrate how to detect this boundary with analyses of sediment color intensity. We analyzed 182 sediment profile images taken along three transects leading from approximately 50 m inside to 200 m outside a long-line mussel farm in New Zealand and found that the mean sediment color intensity inside the farm boundary was almost one third lower than that of the sediment distant from the farm. Segmented regression analysis of the combined color intensity data revealed a breakpoint in the trend of increasing grey values with increasing distance from the farm at 56 ± 13 m (± 95% confidence interval of the breakpoint) outside the mussel farm. Statistical analyses indicated that the extent of the color intensity footprint was a function of water column depth, as was shown visually using mapping methods; organic particles disperse further in a deeper seawater column. We conclude that for soft coastal sediments, our sampling and data analysis techniques may provide a rapid and reliable supplement to existing benthic surveys that assess environmental effects of mussel farms.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0129894&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/20290
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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作者单位: Institute for Applied Ecology New Zealand, School of Applied Sciences, Auckland University of Technology, Auckland, New Zealand;Institute for Applied Ecology New Zealand, School of Applied Sciences, Auckland University of Technology, Auckland, New Zealand

Recommended Citation:
Peter S. Wilson,Kay Vopel. Assessing the Sulfide Footprint of Mussel Farms with Sediment Profile Imagery: A New Zealand Trial[J]. PLOS ONE,2015-01-01,10(6)
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