Into the Deep: Temperature effects on coupled biogeochemical cycles in deep soil profiles of a wet tropical forest

深入深处：温度对潮湿热带森林深层土壤剖面耦合生物地球化学循环的影响

基本信息

批准号：
1754713
负责人：
Tana Wood
金额：
$ 36.46万
依托单位：
Ciudadanos del Karso Inc.
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-05-15 至 2023-04-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1754713&HistoricalAwards=false
关键词：
Into Deep Temperature effects coupled

项目摘要

Tropical forests are an important part of the planet's biosphere. Although they only cover about 15 % of the planet's surface, tropical forests contain two-thirds of live plant biomass and nearly one-third of all soil carbon. Also, these forests exchange more carbon dioxide with the atmosphere than any other terrestrial ecosystem. Changes in carbon cycling in tropical forests, therefore, could substantially alter global atmospheric carbon and, in turn, our planet's future climate. Tropical forests also have very deep soils, yet little is known about carbon cycling of these deeper soils. Temperatures in tropical forests are expected to increase significantly in the next 20 years. Little is known about how tropical forest soil carbon cycling will respond to temperature changes, especially in deeper soils. This research will use a unique soil warming experiment to test hypotheses about how tropical forest soils might respond to future changes. The scientists involved will also use this research to communicate to public audiences the importance of tropical forests for the global environment.The primary goal of this research is to assess relationships between temperature and biogeochemical cycling in deep soils of a wet tropical forest in Puerto Rico. This work takes advantage of the first in situ warming experiment in a tropical forest. Three primary goals of this work are to investigate the mechanisms by which temperature and depth interact in tropical soil to regulate: (1) carbon, nitrogen, and phosphorus cycling; (2) soil oxygen availability; and (3) root lifespan, respiration, and depth distribution. This work will provide information critical to improving our ability to predict tropical forest responses to warming and the potential for these responses to feed back onto future climate. Three 12 m2 circular plots will be warmed + 2 to 4 degrees C relative to three control plots, up to 50 centimeters in depth. Each plot will be instrumented throughout the depth profile for soil temperature, moisture, oxygen, soluble carbon, nutrients, greenhouse gas emissions, and root dynamics. The variation in carbon and nutrient availability along the depth profile will be used to test hypotheses about substrate limitation of microbial and root responses to temperature. The soil and root measurements will further illuminate potential controlling mechanisms on deep soil responses to increased temperature. Ultimately, this deep-warming experiment will significantly advance understanding of processes and organisms below the rooting zone, an exciting biogeochemical frontier.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

热带森林是地球生物圈的重要组成部分。尽管它们仅覆盖地球表面的15％，但热带森林中含有三分之二的活植物生物量和几乎所有土壤碳的三分之一。同样，这些森林与任何其他陆地生态系统相比，将二氧化碳与大气相比更多。因此，热带森林中碳循环的变化可能会大大改变全球大气碳，进而改变我们地球的未来气候。热带森林也有很深的土壤，但对这些更深土壤的碳循环知之甚少。预计在未来20年中，热带森林的温度将显着升高。关于热带森林土壤碳循环将对温度变化的反应，尤其是在更深的土壤中，知之甚少。这项研究将使用独特的土壤变暖实验来测试有关热带森林土壤如何应对未来变化的假设。所涉及的科学家还将使用这项研究向公众传达热带森林对全球环境的重要性。这项研究的主要目的是评估波多黎各湿热森林深层土壤中温度与生物地球化学循环之间的关系。这项工作利用了热带森林中的第一个原位变暖实验。这项工作的三个主要目标是研究温度和深度在热带土壤中相互作用以调节的机制：（1）碳，氮和磷循环；（2）土壤氧的可用性；（3）根寿命，呼吸和深度分布。这项工作将为提高我们预测热带森林对变暖的反应的能力以及这些反应反馈到未来气候的潜力提供至关重要的信息。相对于三个对照图，将为三个12平方米的圆图 + 2至4度C加热，深度为50厘米。每个图都将在整个深度剖面上进行仪器，以进行土壤温度，水分，氧气，可溶性碳，养分，温室气体排放和根动力学。沿深度曲线的碳和营养利用率的变化将用于测试有关微生物对温度的底物限制和根反应的假设。土壤和根测量将进一步阐明对温度升高的深层响应的潜在控制机制。最终，这项深厚的实验将显着提高对生根区以下过程和生物的理解，这是一个令人兴奋的生物地球化学领域。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的智力优点评估来支持的，并具有更广泛的影响标准。

项目成果

期刊论文数量（8）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Warming increases activity in the common tropical frog Eleutherodactylus coqui

DOI：
10.1016/j.ecochg.2021.100041
发表时间：
2021-11
期刊：
Climate Change Ecology
影响因子：
0
作者：
T. Matlaga;P. Burrowes;R. Hernández-Pacheco;J. Pena;C. Sutherland;T. Wood
通讯作者：
T. Matlaga;P. Burrowes;R. Hernández-Pacheco;J. Pena;C. Sutherland;T. Wood

Only sun-lit leaves of the uppermost canopy exceed both air temperature and photosynthetic thermal optima in a wet tropical forest

DOI：
10.1016/j.agrformet.2021.108347
发表时间：
2021-02-06
期刊：
AGRICULTURAL AND FOREST METEOROLOGY
影响因子：
6.2
作者：
Miller, Benjamin D.;Carter, Kelsey R.;Cavaleri, Molly A.
通讯作者：
Cavaleri, Molly A.

Understory plant communities show resistance to drought, hurricanes, and experimental warming in a wet tropical forest

DOI：
10.3389/ffgc.2022.733967
发表时间：
2022-07
期刊：
影响因子：
0
作者：
A. M. Alonso-Rodríguez;T. Wood;Jamarys Torres‐Díaz;M. Cavaleri;S. Reed;B. Bachelot
通讯作者：
A. M. Alonso-Rodríguez;T. Wood;Jamarys Torres‐Díaz;M. Cavaleri;S. Reed;B. Bachelot

Photosynthetic and Respiratory Acclimation of Understory Shrubs in Response to in situ Experimental Warming of a Wet Tropical Forest