A5114254178- Plant Water Relations and Carbon Dynamics
- Soil Carbon and Nitrogen Dynamics
- Forest ecology and management
- Tree-ring climate responses
- Fire effects on ecosystems
- Ecology and Vegetation Dynamics Studies
- Plant responses to elevated CO2
- Peatlands and Wetlands Ecology
- Plant Ecology and Soil Science
- Microbial Community Ecology and Physiology
- Plant responses to water stress
- Forest, Soil, and Plant Ecology in China
- Soil and Unsaturated Flow
- Forest Ecology and Biodiversity Studies
- Climate change and permafrost
- Remote Sensing in Agriculture
- Soil and Water Nutrient Dynamics
- Mycorrhizal Fungi and Plant Interactions
- Horticultural and Viticultural Research
- Botany and Plant Ecology Studies
- Species Distribution and Climate Change
- Plant nutrient uptake and metabolism
- Plant Stress Responses and Tolerance
- Tree Root and Stability Studies
- Atmospheric and Environmental Gas Dynamics
Northeast Forestry University
2016-2025
University of Wisconsin–Madison
2001-2004
Abstract Soil surface CO 2 flux ( R S ) is overwhelmingly the product of respiration by roots (autotrophic respiration, A and soil organisms (heterotrophic H ). Many studies have attempted to partition into these two components, with highly variable results. This study analyzes published data encompassing 54 forest sites shows that are each strongly >0.8) correlated annual across a wide range ecosystems. Monte Carlo simulation showed correlations were significantly stronger than any...
Abstract Soil organic carbon (SOC) persistence is predominantly governed by mineral protection, consequently, soil mineral-associated (MAOC) and particulate (POC) turnovers have different impacts on the vulnerability of SOC to climate change. Here, we generate global MAOC POC maps using 8341 observations then infer turnover times a data-model integration approach. Global storages are $${975}_{964}^{987}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:msubsup> <mml:mrow>...
Abstract Net primary production (NPP) was measured in seven black spruce ( Picea mariana (Mill.) BSP)‐dominated sites comprising a boreal forest chronosequence near Thompson, Man., Canada. The burned between 1998 and 1850, each contained separate well‐ poorly drained stands. All components of NPP were measured, most for 3 consecutive years. Total low (50–100 g C m −2 yr −1 ) immediately after fire, highest 12–20 years fire (332 521 the dry wet stands, respectively) but 50% lower than this...
ABSTRACT We quantified the effect of stand age and tree species composition on canopy transpiration ( E C ) by analysing per unit leaf area L stomatal conductance G S for boreal trees comprising a five wildfire chronosequence. A total 196 sap flux sensors were used 90 consisting Betula papyrifera Marsh (paper birch; present in youngest stand), Populus tremuloides Michx (quaking aspen), Pinus banksiana Lamb. (jack pine), Picea mariana (Mill.) (black spruce). While fine roots positively...
Abstract Scaling soil respiration ( R S ), the major CO 2 source to atmosphere from terrestrial ecosystems, chamber‐based measurements ecosystems requires studies on variations and correlations of various biomes across geographic regions. However, few are available for Chinese temperate forest despite importance this in national global carbon budgets. In study, we conducted 18‐month during 2004–2005 six types, representing typical secondary site conditions northeastern China: Mongolian oak...
Abstract Aim The aim was to explore how conversions of primary or secondary forests plantations agricultural systems influence soil microbial communities and carbon (C) cycling. Location Global. Time period 1993–2017. Major taxa studied Soil microbes. Methods A meta‐analysis conducted examine effects forest degradation on properties attributes related biomass, activity, community composition diversity based 408 cases from 119 studies in the world. Results Forest decreased ratios K...
Abstract Aim Climate change intensifies the hydrological cycle and consequently alters precipitation regimes. Accurately assessing future carbon (C) budgets depends on understanding influence of altered both aboveground C cycling belowground processes. Our goal was to explore generalities mechanisms responses soil microbial communities implications for in terrestrial ecosystems. Location Global. Time period 2001–2017. Major taxa studied Soil microbes. Methods We used meta‐analytical...
We quantified the contributions of root respiration (RC) and heterotrophic to soil surface CO 2 flux ( RS ) by comparing trenched untrenched plots in well-drained poorly drained stands a black spruce Picea mariana (Mill.) BSP) fire chronosequence northern Manitoba, Canada. Our objectives were to: (1) test different equations for modeling as function temperature; (2) model annual RC from continuous temperature measurements. The choice equation strongly affected RC, with an Arrhenius-based...
Abstract The objective of this study was to quantify carbon (C) distribution for boreal black spruce ( Picea mariana (Mill.) BSP) stands comprising a fire chronosequence in northern Manitoba, Canada. experimental design included seven well‐drained (dry) and poorly‐drained (wet) that burned between 1998 1850. Vegetation C pools (above‐ground + below‐ground) steadily increased from 1.3 83.3 t ha −1 the dry chronosequence, 0.6 37.4 wet chronosequence. detritus (woody debris forest floor) varied...
Abstract Partitioning soil respiration ( R S ) into heterotrophic H and rhizospheric components is an important step for understanding modeling carbon cycling in forest ecosystems, but few studies on exist Chinese temperate forests. In this study, we used a trenching plot approach to partition six forests northeastern China. Our specific objectives were (1) examine seasonal patterns of surface CO 2 fluxes from trenched T untrenched plots UT these forests; (2) quantify annual their relative...
Most North American forests are at some stage of post-disturbance regrowth, subject to a changing climate, and exhibit growth mortality patterns that may not be closely coupled annual environmental conditions. Distinguishing the possibly interacting effects these processes is necessary put short-term studies in longer term context, particularly important for carbon-dense, fire-prone boreal forest. The goals this study were combine dendrochronological sampling, inventory records,...
Abstract The elevated CO 2 concentration (eCO ) is expected to improve plant water relations and carbon (C) uptakes, with a potential mitigate drought stress. However, the interactive effects of eCO on physiology growth are not clear. We performed meta‐analysis relations, photosynthesis, biomass production allocation. found that did lead conservation soil water, but improved leaf status under conditions as evidenced by higher relative content (LRWC) less negative midday potential, resulting...
The sequence of physiological events during drought strongly impacts plants' overall performance. Here, we synthesized the global data stomatal and hydraulic traits in leaves stems 202 woody species to evaluate variations water potentials for key their along climatic gradient. We found that seasonal minimum potential, turgor loss point, closure leaf stem xylem vulnerability embolism were intercorrelated decreased with aridity, indicating stress drives trait co-selection. In xeric regions,...