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The Role of Calcium Supply In The Structure and Function of a Northern Hardwood Forest

钙供应在北方阔叶林结构和功能中的作用

基本信息

批准号：
9726837
负责人：
Charles Driscoll
金额：
$ 160万
依托单位：
Syracuse University
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1998
资助国家：
美国
起止时间：
1998-07-15 至 2004-06-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9726837&HistoricalAwards=false
关键词：
Role Calcium Supply Structure Function

项目摘要

ABSTRACT PROPOSAL # : 9726837 INVESTIGATOR(S) : DRISCOLL INSTITUTION: SYRACUSE UNIVERSITY Long-term studies at the Hubbard Brook Experimental Forest in New Hampshire and elsewhere in eastern North America have shown the depletion of large quantities of calcium from base-poor soil by acid rain. Calcium is an important nutrient of forest ecosystems. The supply of calcium controls the acidity of soil and waters, and influences important characteristics of northern forests and streams. This research will investigate the role of calcium in the ecology of forests and streams. The supply of calcium to an experimental watershed at Hubbard Brook will be enhanced by the experimental addition of a highly-weatherable calcium-silicate mineral, wollastonite. The wollastonite will be applied by helicopter. The added wollastonite will dissolve in approximately seven years, replacing the calcium that has been depleted from the watershed over the last 50 years. The wollastonite has a distinct stable isotope signature that will enable the transport and fate of added calcium to be traced with high sensitivity. Changes in the chemical characteristics of soil and water, the activity of soil microbes, soil invertebrate communities, forest vegetation and stream biota will be determined. Continued monitoring will attempt to quantify the cause-effect relationship between the soil calcium content and the ecological characteristics of northern forests and streams over very long time scales (i.e. 50 yr).

摘要提案编号：9726837 经销商：DRISCOLL 研究机构：锡拉丘兹University 在新罕布什尔州的哈伯德布鲁克实验森林和北美东部其他地方进行的长期研究表明，酸雨会耗尽碱性贫瘠土壤中的大量钙。钙是森林生态系统的重要营养元素。钙的供应控制着土壤和沃茨的酸度，并影响着北方森林和溪流的重要特征。这项研究将调查钙在森林和溪流生态中的作用。在哈伯德布鲁克的一个实验性流域，钙的供应将通过实验性地添加一种高度耐候的硅酸钙矿物硅灰石来提高。硅灰石将通过直升机施用。添加的硅灰石将在大约7年内溶解，取代过去50年来从分水岭中耗尽的钙。硅灰石具有独特的稳定同位素特征，这将使得能够以高灵敏度追踪添加的钙的运输和命运。将确定土壤和水的化学特性的变化、土壤微生物的活动、土壤无脊椎动物群落、森林植被和溪流生物群。继续监测将试图在很长的时间尺度（即50年）内量化土壤钙含量与北方森林和溪流生态特征之间的因果关系。