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Identifying Key Factors Influencing Regional Fishing Footprints in Coastal Waters 期刊论文
SSRN, 2023
作者:  Chen, Renli;  Wang, Yueqi;  Wu, Xiaoqing;  Gao, Zhiqiang
收藏  |  浏览/下载：85/0  |  提交时间：2024/01/26
Automation  Environmental management  Environmental technology  Information management  Oceanography  Remote sensing  Surface temperature  Surface waters  Sustainable development  
食用蔬菜能吸收和积累微塑料 期刊论文
科学通报, 2019, 卷号: 64, 期号: 9, 页码: 928-934
作者:  李连祯;  周倩;  尹娜;  涂晨;  骆永明
收藏  |  浏览/下载：493/0  |  提交时间：2020/06/17
微塑料  生菜  聚苯乙烯微球  吸收  积累  健康风险  microplastics  lettuce  polystyrene microbeads  uptake  accumulation  human health risk  Microplastic (MP, 100 nm-5 mm) may present an attributable risk to ecosystem and human health, and its pollution has become a global environmental concern. Despite a wealth of information on the accumulation of MPs in aquatic species, there is no information on the uptake and accumulation of MPs by higher plants. Terrestrial edible plants are directly exposed to MPs when agricultural soil was applied with organic manure, sewage sludge as fertilizer or plastic mulching. In this paper, the uptake of two sizes of polystyrene (PS) microbeads (0.2 and 1.0 mum) and then their distribution and migration in an edible plant lettuce were firstly investigated based on laboratory experiments. We used fluorescent markers to track PS microbeads in plant tissues and found fluorescence to be a sensitive and reliable detection method. Sections from untreated control lettuce showed no autofluorescence. When roots were treated with fluorescently labeled PS microbeads, the microbeads could be identified by its fluorescence. Our main study investigated the uptake of 0.2 mum beads, as few luminescence signals were observed in lettuce roots for 1.0 mum beads in our experiment. We observed that 0.2 mum fluorescent microbeads were extracellularly trapped in the root cap mucilage (which is a highly hydrated polysaccharide) and a dark green tip (which was typical of lettuce roots exposed to label PS beads) was usually visible to the naked eye. Confocal images revealed that the PS luminescence signals were mainly located in the vascular system and on the cell walls of the cortex tissue of the roots, indicated that the beads passed through the intercellular space via the apoplastic transport system. Once inside the central cylinder, the 0.2 mum PS beads were transferred from the roots to the stems and leaves via the vascular system following the transpiration stream. We also observed that the PS beads adhered to one another and self-assembled systematically into grape-like and (chain) string-like clusters in the intercellular space of the root and stem vascular tissue of lettuce plant. In contrast to the root and stem, PS beads were dispersed in the leaf tissue. Here, for the first time we provide evidence of the adherence, uptake, accumulation, and translocation of submicrometer MPs within an edible plant. Our findings highlight the previously underappreciated human exposure pathway to MPs through the consumption of contaminated crops and emphasize the need for new management strategies to control the release of MPs waste products into the terrestrial environment. Ultimately, the potential impacts of low range sized MPs on food safety of crop plants and human health need to be urgently considered.  
Geoscience information integration and visualization research of shandong province, China based on ArcGIS engine 会议论文
Remote Sensing and Modeling of Ecosystems for Sustainability XI, San Diego, CA, United states, August 18, 2014 - August 20, 2014
作者:  Xu, Mingzhu(1);  Gao, Zhiqiang(2,3);  Ning, Jicai(2);  Xu, Mingzhu
浏览  |  Adobe PDF(329Kb)  |  收藏  |  浏览/下载：659/280  |  提交时间：2015/08/10
Information Management  Access Efficiencies  Arcgis Engine  Data Management System  Geodatabase  Geographical Information Integration  Geoscience Data  Geoscience Information  Visualization Research  
An intelligent bay Geo-information retrieval approach based on Geo-ontology 会议论文
2009 17th International Conference on Geoinformatics, Geoinformatics 2009, 2009-08-12
Xiao,Rulin; Liu,Wei; Du,Yunyan; He,Yawen
浏览  |  Adobe PDF(352Kb)  |  收藏  |  浏览/下载：1205/550  |  提交时间：2011/07/22
Information Management - Information Retrieval - Information Services - Information Systems - Management Information Systems - Ontology - Query Languages - Semantics