A5079109874- Forest Management and Policy
- Forest ecology and management
- Plant Water Relations and Carbon Dynamics
- Fire effects on ecosystems
- Atmospheric and Environmental Gas Dynamics
- Ecology and Vegetation Dynamics Studies
- Land Use and Ecosystem Services
- Remote Sensing and LiDAR Applications
- Conservation, Biodiversity, and Resource Management
- Climate variability and models
- Wildlife-Road Interactions and Conservation
- Remote Sensing in Agriculture
- Soil Carbon and Nitrogen Dynamics
- Tree-ring climate responses
- Plant responses to elevated CO2
- Soil and Water Nutrient Dynamics
- Peatlands and Wetlands Ecology
- Forest Ecology and Biodiversity Studies
- Atmospheric chemistry and aerosols
- Environmental Conservation and Management
- Climate Change Policy and Economics
- Environmental Impact and Sustainability
- Soil Geostatistics and Mapping
- Climate change and permafrost
- Plant and animal studies
Dalian Polytechnic University
2025
US Forest Service
2014-2024
Northern Research Station
2014-2024
John Wiley & Sons (United States)
2014-2020
Ecological Society of America
2016-2020
Rocky Mountain Research (United States)
2018
Rocky Mountain Research Station
2018
Sierra Nevada Corporation (United States)
2016
Oregon State University
2014
Corvallis Environmental Center
2014
Net average global annual uptake of atmospheric carbon dioxide by forests was 1.1 petagrams carbon, roughly one-sixth fossil fuel emissions.
Forests are the dominant terrestrial ecosystem on Earth. We review environmental factors controlling their structure and global distribution evaluate current future trajectory. Adaptations of trees to climate resource gradients, coupled with disturbances forest dynamics, create complex geographical patterns in assemblages structures. These increasingly discernible through new satellite airborne observation systems, improved inventories, models. Forest biomass is a property affected by...
Abstract. Most forests of the world are recovering from a past disturbance. It is well known that forest disturbances profoundly affect carbon stocks and fluxes in ecosystems, yet it has been great challenge to assess disturbance impacts estimates budgets. Net sequestration or loss CO2 by after follows predictable pattern with recovery. Forest age, which related time since disturbance, useful surrogate variable for analyses impact on carbon. In this study, we compiled first continental age...
Abstract. A globally integrated carbon observation and analysis system is needed to improve the fundamental understanding of global cycle, our ability project future changes, verify effectiveness policies aiming reduce greenhouse gas emissions increase sequestration. Building an requires transformational advances from existing sparse, exploratory framework towards a dense, robust, sustained in all components: anthropogenic emissions, atmosphere, ocean, terrestrial biosphere. The paper...
We ran the terrestrial ecosystem model (TEM) for globe at 0.5° resolution atmospheric CO 2 concentrations of 340 and 680 parts per million by volume (ppmv) to evaluate global regional responses net primary production (NPP) carbon storage elevated their sensitivity changes in vegetation nitrogen concentration. At ppmv, TEM estimated NPP 49.0 10 15 g (Pg) C yr −1 total 1701.8 Pg C; estimate does not include content inert soil organic matter. For reference simulation which doubled was...
Net primary productivity (NPP) is a key flux in the terrestrial ecosystem carbon balance, as it summarizes autotrophic input into system. Forest NPP varies predictably with stand age, and quantitative information on NPP‐age relationship for different regions forest types therefore fundamentally important cycle modeling. We used four terms to calculate NPP: annual accumulation of live biomass, mortality aboveground belowground foliage turnover soil, fine root soil. For U.S. forests first two...
Abstract We develop an approach for estimating net ecosystem exchange ( NEE ) using inventory‐based information over North America NA a recent 7‐year period (ca. 2000–2006). The notably retains on the spatial distribution of , or vertical between land and atmosphere all non‐fossil fuel sources sinks CO 2 while accounting lateral transfers forest crop products as well their eventual emissions. total estimate −327 ± 252 TgC yr −1 sink was driven primarily by uptake in Forest Lands sector (−248...
Recent climate variability (increasing temperature, droughts) and atmospheric composition changes (nitrogen deposition, rising CO 2 concentration) along with harvesting, wildfires, insect infestations have had significant effects on U.S. forest carbon (C) uptake. In this study, we attribute C in the conterminous forests to disturbance non‐disturbance factors help of inventory data, a continental stand age map, an updated Integrated Terrestrial Ecosystem Carbon Cycle model (InTEC). We grouped...
Abstract Forests play an important role in global carbon cycles. However, the lack of available information on stocks dead organic matter, including woody debris and litter, reduces reliability assessing cycles entire forest ecosystems. Here we estimate that national DOM stock period 2004–2008 is 925 ± 54 Tg, with average density 5.95 0.35 Mg C ha −1 . Over past two decades from periods 1984−1988 to 2004−2008, matter has increased by 6.7 2.2 Tg per year, primarily due increasing area....
Significance The future of the terrestrial carbon (C) sink has tremendous consequences for society and rate climate change, but is highly uncertain. sensitivity interannual variability in C to drivers can help elucidate mechanisms driving sink. Here, we test statistical strength major find that nighttime tropical temperatures are most strongly associated with global from 1959–2010, likely acting through their effect on respiration. temperature-mediated respiration highlights stores may be...
Abstract. The use of dynamic global vegetation models (DGVMs) to estimate CO2 emissions from land-use and land-cover change (LULCC) offers a new window account for spatial temporal details ecosystem processes affected by LULCC. One drawback LULCC DGVMs, however, is lack observation constraint. Here, we propose method using satellite- inventory-based biomass observations constrain historical cumulative (ELUCc) an ensemble nine DGVMs based on emerging relationships between simulated ELUCc....
As interest grows in quantification of global carbon cycles, process model predictions forest biomass and net primary production (NPP) are being developed at an accelerating rate. Such models can provide useful large scales, but it has been difficult to evaluate their performance. Using the network plots comprising comprehensive spatially extensive Forest Inventory Analysis (FIA) data set collected maintained by USDA Service, we applied methods typically used field measurements develop...
ABSTRACT Aim Our aims were to quantify climatic and soil controls on net primary productivity (NPP) leaf area index (LAI) along subtropical alpine gradients where the vegetation remains relatively undisturbed, investigate whether NPP LAI converge towards threshold‐like logistic patterns associated with variables that would help us verify parameterize process models for predicting future ecosystem behaviour under global environmental change. Location Field data collected from 22 sites Tibetan...
The REDD+ scheme of the United Nations Framework Convention on Climate Change has provided opportunities to manage tropical forests for timber production and carbon emission reductions. To determine appropriate logging techniques, we analyzed potential reductions under two techniques over a 40-year period selective logging. We found that use reduced-impact (RIL) alone in could reduce emissions equivalent 29-50% net from deforestation land change, while also supplying 45% global round-wood...