LTREB: Drivers of temperate forest carbon storage from canopy closure through successional time

LTREB：从树冠关闭到演替时间的温带森林碳储存驱动因素

• 批准号: 1353908
• 负责人: Knute Nadelhoffer
• 金额: $ 44.86万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-04-15 至 2019-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1353908&HistoricalAwards=false
• 关键词: LTREB; Drivers; temperate; forest; carbon

Disturbances to forests, such as logging or wildfires, typically lead to large losses of carbon and nutrients from both the plants and soils of the ecosystem. Virtually all forests are in some state of recovery from such disturbances, whether caused naturally or by humans. Knowledge of the time required for a forest to recover its original amounts of carbon and nutrients after a disturbance is not complete, nor is an understanding of how regrowing plants, recovering soils and the year to year variation in climate interact to control recovery as a forest ages. This project takes advantage of long existing research plots in forests at the University of Michigan Biological Station to figure out how changes in forest structure, carbon and nitrogen contents of the forests, and variations in climate act together through time to influence how fast trees grow, nitrogen is retained, and carbon is captured and stored in forests. Scientists and students will make regular measurements of the types of trees, their stem sizes and mass, their patterns of leaf arrangement, the amounts of carbon and nitrogen in soils, and other factors in five forest that were cut and burned in 1936, 1948, 1954, 1980, and 1998 and so today range from 15 years to 115 years old. Several nearby much older forests will also be sampled. This will let the project link disturbances, climate and ecology for forests that are broadly representative of those across the northern United States, Canada, Europe and Asia.This project will involve students and forest managers in portions of the research and in the application of results to actual forest management. Undergraduate students will help design and carry out regular field measurements of tree and soil properties. Results will be used in general ecology and forest ecosystem courses taken by students at the field station in the summer. Both undergraduate and graduate students will also be able to use the plots and other data to conduct their own research projects. The team will also host site visits and conduct workshops for forest managers in state and federal agencies, as well as those in local conservation groups.

对森林的干扰，例如伐木或野火，通常会导致生态系统的植物和土壤碳和养分大量流失。事实上，所有森林都处于某种从此类干扰中恢复的状态，无论是自然造成的还是人为造成的。 对于森林在受到干扰后恢复其原始碳和养分量所需的时间的了解并不完整，对于植物的重新生长、土壤的恢复和气候的逐年变化如何相互作用以控制森林老化过程中的恢复的了解也不完整。该项目利用密歇根大学生物站现有的长期森林研究地块，弄清楚森林结构的变化、森林的碳和氮含量以及气候变化如何随着时间的推移共同作用，影响树木的生长速度、氮的保留以及森林中碳的捕获和储存。科学家和学生将定期测量 1936 年、1948 年、1954 年、1980 年和 1998 年砍伐和烧毁的五片森林中的树木类型、茎的大小和质量、叶子的排列方式、土壤中的碳和氮含量以及其他因素，这些森林的树龄从 15 年到 115 年不等。 附近的几片更古老的森林也将被采样。这将使该项目将广泛代表美国北部、加拿大、欧洲和亚洲森林的干扰、气候和生态联系起来。该项目将让学生和森林管理者参与部分研究并将结果应用于实际森林管理。本科生将帮助设计和定期进行树木和土壤特性的现场测量。 结果将用于学生夏季在野外站学习的普通生态学和森林生态系统课程。本科生和研究生也将能够使用这些图和其他数据来开展自己的研究项目。该团队还将为州和联邦机构以及当地保护团体的森林管理者进行实地考察并举办研讨会。