US-Mexico Collaborative Research: Afforestation Effects on Nitrogen Cycling in Mexico's Eastern Highlands

美国-墨西哥合作研究：墨西哥东部高地造林对氮循环的影响

• 批准号: 1132444
• 负责人: Alexandra Ponette
• 金额: $ 4.67万
• 依托单位: University of North Texas
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-10-01 至 2014-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1132444&HistoricalAwards=false
• 关键词: US; Mexico; Collaborative; Research; Afforestation

In this U.S.-Mexico project researchers from the U.S. and Mexico will gain a preliminary understanding of the consequences of tropical afforestation and its spatial configuration across the landscape for nitrogen cycling, and to identify and model landscapes where plantation establishment is likely to have the greatest impact on nitrogen biogeochemistry. In this pilot study baseline measurements of nitrogen fluxes and nitrogen cycling will be conducted, and the ratios of carbon to nitrogen to phosphorus (C:N:P) in the litter and soils of pine plantations and grasslands will be examined. By quantifying differences in nitrogen cycling between pine plantations and grasslands, the research will shed light on ecosystem response to afforestation, whether natural or intentional, and to increasing levels of nitrogen deposition. Such investigations are needed in order to scale ecosystem process rates such as nitrification across spatially heterogeneous landscapes and to predict watershed nitrogen losses more accurately. This pilot will be carried out by an interdisciplinary team of researchers from two U.S. institutions, the University of North Texas and Cary Institute of Ecosystem Studies, in conjunction with colleagues from Universidad Veracruzana in Mexico.This project affords a valuable opportunity to answer important questions at the intersection of ecosystem science, global change, and land-cover change. This project should enable the researchers to confirm previous findings and develop a model of the nitrogen-cycling effects of afforestation, especially within the context of land-use change, increased nitrogen deposition from urbanization, and phosphorus-limited forests of tropical developing countries worldwide. The results of this study will provide the foundations for a future international collaborative research proposal that can provide important data for policy makers considering the implications of reforestation and afforestation and the potential trade-offs and unintended consequences of each. Graduate students and early-career scientists from underrepresented groups will benefit from inclusion in these studies with international research partners. Involvement of young researchers in collaborative international activities is a major goal of OISE.

在这个美国-墨西哥项目中，来自美国和墨西哥的研究人员将初步了解热带造林及其在整个景观中的空间配置对氮循环的影响，并确定和模拟可能对氮生物地球化学产生最大影响的景观。在这项试点研究中，将进行氮通量和氮循环的基线测量，并将检查松树人工林和草地凋落物和土壤中的碳氮磷比率（C:N:P）。通过量化松林和草地之间氮循环的差异，该研究将揭示生态系统对造林的响应，无论是自然的还是人为的，以及对氮沉积水平的增加。这样的调查是必要的，以便衡量生态系统过程的速率，如跨空间异质景观的硝化作用，并更准确地预测流域氮损失。该试点项目将由来自美国北德克萨斯大学和加里生态系统研究所这两家机构的跨学科研究小组与墨西哥韦拉克鲁斯纳大学的同事共同开展。这个项目提供了一个宝贵的机会来回答生态系统科学、全球变化和土地覆盖变化交叉的重要问题。该项目应使研究人员能够证实以前的发现，并开发造林的氮循环效应模型，特别是在土地利用变化、城市化增加的氮沉积和全世界热带发展中国家磷限制森林的背景下。这项研究的结果将为今后的国际合作研究建议提供基础，为决策者考虑再造林和造林的影响以及两者的潜在权衡和意外后果提供重要数据。来自代表性不足群体的研究生和早期职业科学家将受益于与国际研究伙伴一起参与这些研究。青年研究人员参与国际合作活动是OISE的一个主要目标。

项目成果

Hydrologic Connectivity in the High-Elevation Tropics: Heterogeneous Responses to Land Change

高海拔热带地区的水文连通性：对土地变化的异质响应

• DOI: 10.1093/biosci/bit013
• 发表时间: 2013
• 期刊: BioScience
• 影响因子: 10.1
• 作者: Ponette-González, Alexandra G.;Marín-Spiotta, Erika;Brauman, Kate A.;Farley, Kathleen A.;Weathers, Kathleen C.;Young, Kenneth R.
• 通讯作者: Young, Kenneth R.

Managing water services in tropical regions: From land cover proxies to hydrologic fluxes

• DOI: 10.1007/s13280-014-0578-8
• 发表时间: 2015-09
• 期刊: Ambio
• 影响因子: 6.5
• 作者: A. Ponette-González;K. Brauman;E. Marín-Spiotta;K. Farley;K. Weathers;K. Young;L. Curran

Nitrogen cycling in tropical Atlantic Forest differing in exposure to urban atmospheric nitrogen deposition

热带大西洋森林的氮循环因暴露于城市大气氮沉降而不同

• DOI: 10.1007/s11104-017-3421-8
• 发表时间: 2017
• 期刊: Plant and Soil
• 影响因子: 4.9
• 作者: Ponette-González, A. G.;Perroni, Y.;Weathers, K. C.;de Souza, P. A.;García-Oliva, F.;de Mello, W. Z.
• 通讯作者: de Mello, W. Z.