LTER: Luquillo LTER VI: Understanding Ecosystem Change in Northeastern Puerto Rico

LTER：Luquillo LTER VI：了解波多黎各东北部的生态系统变化

基本信息

批准号：
1831952
负责人：
Jess Zimmerman
金额：
$ 676.2万
依托单位：
University of Puerto Rico-Rio Piedras
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-02-15 至 2025-01-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1831952&HistoricalAwards=false
关键词：
LTER Luquillo VI Understanding Ecosystem

项目摘要

Since the Luquillo LTER began in 1988, multiple hurricanes and droughts have affected the site. Building on a 90-year research history on ecology in natural and human-modified forests, the Luquillo LTER has shown that while tropical forests exhibit resilience to individual disturbance events, the potential combination of increased frequency of intense storms, like Hurricane Maria in 2017, and more frequent drought, may compromise ecosystem resilience in the long-term. The Luquillo Long-Term Ecological Research Program (LTER) combines long-term measurements, experimental manipulations, and computer simulations to determine the effects of changes in the frequency and intensity of disturbance events, such as hurricanes and droughts, on tropical forests represented by the Luquillo Mountains in eastern Puerto Rico, USA. During the next six years, the Luquillo LTER will document the impacts of Hurricane Maria, the most intense storm to impact the island in ninety years, on the forests of the Luquillo Mountains while continuing to evaluate the potential effects of increased drought predicted for the region. It is important to understand how tropical forests respond to these disturbance events because they play a key role in global carbon and water dynamics and provide essential ecosystem services, such as clean water and carbon dioxide absorption, to people worldwide. The Luquillo LTER will continue to train numerous undergraduate and graduate students, as well as secondary school students and teachers, especially members of underrepresented groups, producing a cadre of new multidisciplinary scientists and citizens who have the skills and experiences to address the pressing environmental challenges of the 21st Century.The research tests hypotheses that changing disturbance regimes, interacting with the effects of past disturbance events, will result in new combinations of species and altered biogeochemical dynamics different from previous environmental conditions and characteristics. These new ecosystem states will arise from the legacies of multiple disturbances, as well as from the immigration of species adapted to drier and hotter conditions associated with canopy openings and more frequent droughts. The research will continue to characterize the spatial and temporal dynamics of biota and biogeochemical processes in native tabonuco forest and leverage elevational variation in the Luquillo Mountains as a climate proxy to provide context for our measurements. The continuing Canopy Trimming Experiment will test hypotheses that more frequent intense hurricanes will increase the dominance of shade intolerant species with cascading effects through other biota and consequences for biogeochemical dynamics. Two new experiments, the Throughfall Exclusion Experiment and the Stream Flow Reduction Experiment, will address hypotheses that increased drought frequency will alter species composition and distribution as well as soil carbon and nutrient storage along hillslopes and in streams. Computer models and data-model integration will provide predictive understanding of the combined effects of increased drought and hurricane frequency on tropical forests, as well as facilitate synthesis across scales, and forecasting of future ecosystem states.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.

自1988年开始Luquillo lter以来，多次飓风和干旱影响了该地点。卢奎洛（Luquillo）的基础为自然和人类修饰的森林的90年研究史，虽然热带森林表现出对个体干扰事件的韧性，但强烈风暴频率增加的潜在组合，例如2017年飓风玛丽亚（Hurricane Maria），以及更频繁的频繁频率，但可能会损害长期的生态系统弹性。 Luquillo长期生态研究计划（LTER）结合了长期测量，实验操作和计算机模拟，以确定干扰事件的频率和强度变化的影响，例如飓风和干旱，对美国东部Puerto Ricico luquillo Mount代表的热带森林。在接下来的六年中，Luquillo lter将记录飓风玛丽亚的影响，玛丽亚飓风是九十年来影响该岛对卢奎洛山脉森林的最激烈的风暴，同时继续评估该地区预计干旱的潜在影响。重要的是要了解热带森林如何应对这些干扰事件，因为它们在全球碳和水力动力学中发挥了关键作用，并为全球人提供了必不可少的生态系统服务，例如清洁水和二氧化碳的吸收。 Luquillo lter将继续培训众多的本科生和研究生，以及中学生和老师，尤其是代表人数不足的团体的成员，生产成新的多学科科学家和公民的干部，他们具有具有21世纪的紧迫环境挑战的技能和经验。物种并改变了生物地球化学动力学，与以前的环境条件和特征不同。这些新的生态系统状态将来自多种干扰的遗产，以及适合于冠层开口和更频繁干旱的较干燥和更热的物种的移民。这项研究将继续将天然塔巴努科森林中生物群和生物地球化学过程的空间和时间动态表征，并利用卢奎洛山脉的高度差异为气候代理，为我们的测量提供背景。持续的冠层修剪实验将检验假设，即更频繁的激烈飓风将通过其他生物群来提高阴影不耐受物种的主导地位，以及对生物地球化学动力学的后果。两个新的实验，即贯穿排除实验和溪流减少实验，将提出假设，即增加干旱频率将改变物种组成和分布以及沿山坡和溪流中的土壤碳和养分存储。计算机模型和数据模型整合将提供对增加的干旱和飓风频率对热带森林的综合影响的预测理解，并促进跨尺度的综合，并预测未来的生态系统国家。该奖项反映了NSF的法规任务，并被认为是通过基金会的知识效果和广泛的评估来评估的，并且值得通过评估来进行评估。

项目成果

期刊论文数量（169）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Tropical Forest Microclimatic Changes: Hurricane, Drought, and 15–20 Year Climate Trend Effects on Elevational Gradient Temperature and Moisture

热带森林小气候变化：飓风、干旱和15-20年气候趋势对海拔梯度温度和湿度的影响

DOI：
10.3390/f14020325
发表时间：
2023
期刊：
Forests
影响因子：
2.9
作者：
Van Beusekom, Ashley E.;González, Grizelle;Rivera, María M.
通讯作者：
Rivera, María M.

MEIOFAUNA IN TROPICAL MONTANE STREAMS: BIOTIC AND ABIOTIC FACTORS REGULATING COMMUNITIES

DOI：
10.15446/abc.v28n2.103379
发表时间：
2023-05
期刊：
Acta Biológica Colombiana
影响因子：
0
作者：
J. Santiago-Vera;Alonso Ramírez
通讯作者：
J. Santiago-Vera;Alonso Ramírez

The spatial configuration of taxonomic biodiversity along a tropical elevational gradient: α‐, β‐, and γ‐partitions

沿热带海拔梯度分类生物多样性的空间配置：α-、β-和γ-分区

DOI：
10.1111/btp.12632
发表时间：
2019
期刊：
Biotropica
影响因子：
2.1
作者：
Willig, Michael R.;Presley, Steven J.
通讯作者：
Presley, Steven J.

Reversals of Reforestation Across Latin America Limit Climate Mitigation Potential of Tropical Forests

拉丁美洲重新造林的逆转限制了热带森林减缓气候变化的潜力

DOI：
10.3389/ffgc.2020.00085
发表时间：
2020
期刊：
Frontiers in Forests and Global Change
影响因子：
3.2
作者：
Schwartz, Naomi B.;Aide, T. Mitchell;Graesser, Jordan;Grau, H. Ricardo;Uriarte, María
通讯作者：
Uriarte, María

Low Redox Decreases Potential Phosphorus Limitation on Soil Biogeochemical Cycling Along a Tropical Rainfall Gradient