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-. 河岸蜘蛛——多样水生生态系统中PCB污染的指示生物[J]. 生态毒理学报, 2017, 12(3):
河岸蜘蛛——多样水生生态系统中PCB污染的指示生物
Riparian Spiders as Sentinels of PCB Contamination Across Heterogeneous Aquatic Ecosystems
  
DOI:10.7524/AJE.1673-5897.201718etc
中文关键词:  
英文关键词:Aquatic–terrestrial linkages  Rivermouths  Araneae  Manistique River and Harbor  Great Lakes  Areas of Concern
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中文摘要:
      栖息在河岸的蜘蛛越来越多地被用来追踪水生生态系统中存在和流出污染物的空间格局。然而,我们对蜘蛛在何种情况下可有效标志水生污染的认识有限。本研究力证在具有高生境异质性的水生生态系统中,能够有效地利用河岸蜘蛛来追踪沉积物中多氯联苯(PCBs)污染的空间格局。2011年到2013年,在五大湖共同关注区(AOC)的Manistique河流域,对2类常见科属的河岸蜘蛛进行采样,结果表明生物体内的ΣPCB浓度的空间格局能够普遍地追踪采样点范围内沉积物中ΣPCBs的空间变化。该研究区域位于密歇根北部半岛南岸(Manistique,MI,US),是一个河口生态系统,包括港口、河流、回水和湖泊等栖息地。沉积物ΣPCB浓度用总有机碳浓度进行归一,解释了11个采样点中41%的以脂类归一的蜘蛛ΣPCB浓度变异。此外,2类常见河岸蜘蛛类群(园蛛科Araneidae和长脚蛛科Tetragnathidae)的ΣPCB浓度高度相关(r2 > 0.78),并且按全年计算其平均ΣPCB浓度两者相似。结果表明,在异质性的水生生态系统中,例如在河流入海口,会因为栖息地和污染物变化在水生生物分类中的差别不明显,河岸蜘蛛就可能成为水生和河岸食物网中PCB有效性的标记物。此外,对于为不同种群大型结网蜘蛛提供生存条件的海岸线开发和沿岸植被的生境异质性,目前的方法具有很强的适用性。
精选自Kraus, J. M., Gibson, P. P., Walters, D. M. and Mills, M. A. (2017), Riparian spiders as sentinels of polychlorinated biphenyl contamination across heterogeneous aquatic ecosystems. Environmental Toxicology and Chemistry, 36: 1278–1286. doi: 10.1002/etc.3658
详情请见http://onlinelibrary.wiley.com/doi/10.1002/etc.3658/full
  
AuthorAffiliation
Johanna M. Kraus 1,*, Polly P. Gibson 2, David M. Walters 1, Marc A. Mills 31. Fort Collins Science Center, US Geological Survey, Fort Collins, Colorado, USA 2. Contractor, Fort Collins Science Center, US Geological Survey, Fort Collins, Colorado, USA 3. National Risk Management Laboratory, US Environmental Protection Agency, Cincinnati, Ohio, USA
英文摘要:
      Riparian spiders are being used increasingly to track spatial patterns of contaminants in and fluxing from aquatic ecosystems. However, our understanding of the circumstances under which spiders are effective sentinels of aquatic pollution is limited. The present study tests the hypothesis that riparian spiders may be effectively used to track spatial patterns of sediment pollution by polychlorinated biphenyls (PCBs) in aquatic ecosystems with high habitat heterogeneity. The spatial pattern of ΣPCB concentrations in 2 common families of riparian spiders sampled in 2011 to 2013 generally tracked spatial variation in sediment ΣPCBs across all sites within the Manistique River Great Lakes Area of Concern (AOC), a rivermouth ecosystem located on the south shore of the Upper Peninsula, Manistique (MI, USA) that includes harbor, river, backwater, and lake habitats. Sediment ΣPCB concentrations normalized for total organic carbon explained 41% of the variation in lipid-normalized spider ΣPCB concentrations across 11 sites. Furthermore, 2 common riparian spider taxa (Araneidae and Tetragnathidae) were highly correlated (r2?>?0.78) and had similar mean ΣPCB concentrations when averaged across all years. The results indicate that riparian spiders may be useful sentinels of relative PCB availability to aquatic and riparian food webs in heterogeneous aquatic ecosystems like rivermouths where habitat and contaminant variability may make the use of aquatic taxa less effective. Furthermore, the present approach appears robust to heterogeneity in shoreline development and riparian vegetation that support different families of large web-building spiders.
View more in http://onlinelibrary.wiley.com/doi/10.1002/etc.3658/full
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