Dissertation Research: The effect of human management and soil properties on heavy metal content of Los Angeles Community Garden soils

论文研究：人类管理和土壤性质对洛杉矶社区花园土壤重金属含量的影响

基本信息

批准号：
1210953
负责人：
George Jenerette
金额：
$ 1.5万
依托单位：
University of California-Riverside
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2012
资助国家：
美国
起止时间：
2012-06-01 至 2014-05-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1210953&HistoricalAwards=false
关键词：
Dissertation Research effect human management

项目摘要

Community gardens are hotspots of interactions between humans and the environment. Little is known about biogeochemical cycles or metal accumulation in these constructed ecosystems, both of which can impact the health of crops and the people who consume them. These knowledge gaps will be addressed by investigating the impact of management, land use legacy, and neighborhood on soil and crop metal availability in Los Angeles community gardens. Soils will be collected in 12 gardens from cultivated, uncultivated, and surrounding locations and analyzed for pH and concentrations of nutrients, organic matter, and 29 metals. Leafy and root vegetable samples will be collected from each garden and tested for metal concentrations to determine bioavailability and human exposure risk. Gardeners will also be interviewed about their management activities. A multiple regression framework will be used to determine if gardening practices or neighborhood characteristics (e.g., freeway proximity, previous land use) can be used to predict soil metal concentrations and bioavailability at gardener, garden, and regional scales.Data pertaining to management influence on metal availability will be of use to garden managers and city planning departments. The metal content of urban soils and crops in Los Angeles has important human health implications. Reports on metal content of garden soils and crops, as well as educational materials on soil testing, will be presented to garden managers, participants, and supporting non-profit agencies. These activities will provide access to scientific resources for minority populations.

社区花园是人类与环境之间互动的热点。对于这些构建的生态系统中的生物地球化学周期或金属积累，这两种都会影响农作物的健康和食用它们的人的健康。这些知识差距将通过调查洛杉矶社区花园的管理层，土地利用遗产以及社区对土壤和农作物金属供应的影响来解决这些差距。土壤将在栽培，未经耕种和周围地点的12个花园中收集，并分析pH和浓度的养分，有机物和29种金属。将从每个花园中收集多叶和根蔬菜样品，并测试金属浓度，以确定生物利用度和人类暴露风险。园丁还将接受有关他们的管理活动的采访。多元回归框架将用于确定园艺惯例或邻里特征（例如，高速公路接近，以前的土地使用）是否可用于预测园丁，花园和区域尺度的土壤金属浓度和生物利用度。数据与管理对管理对管理对管理的影响有关金属可用性将用于花园经理和城市规划部门。洛杉矶城市土壤和农作物的金属含量具有重要的人类健康影响。关于花园土壤和农作物的金属含量的报告以及有关土壤测试的教育材料，将向花园经理，参与者和支持非营利机构提供报道。这些活动将为少数族裔人口提供科学资源的访问。