G. Geoff Wang

G. Geoff Wang
Clemson University | CU · School of Agricultural, Forest, and Environmental Sciences

Ph.D.

About

192
Publications
29,104
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
3,301
Citations
Additional affiliations
August 2011 - present
Clemson University
Position
  • Professor (Full)
January 2002 - October 2018
Clemson University
Position
  • Professor (Full)

Publications

Publications (192)
Article
Full-text available
Background Granivore-mediated seed dispersal is susceptible to changes in seed availability and silvicultural management, which alters synzoochorous interactions in the antagonism-mutualism continuum and affects the seed dispersal effectiveness (SDE), and eventually, the plant recruitment. We conducted a whole-year study of seed addition to quantif...
Article
Key message The accuracy of gap age estimation can be improved from 5–6 to 2 years by analyzing the annual width and carbon isotope discrimination of the rings of gap-surrounding trees. Context Gap age has a direct link to the composition and structure of regeneration. However, the accuracy of gap age estimation is still limited. Aim We aim to im...
Article
Tree species mixing is a prevalent practice to improve soil quality in monoculture plantations and the rhizosphere soil organic carbon (SOC) dynamics of conifers will be affected by mixing the species with broad-leaved trees; however, the influence characteristics and underlying mechanism of mixing on rhizosphere SOC mineralization remain elusive....
Article
Full-text available
Soil and climatic conditions are known to have close associations with plant morphological and stoichiometric traits at a regional scale along latitudinal gradients; however, how latitude drives biotic and abiotic factors affecting plant nutrient acquisition to accommodate environmental nutrient deficiency remains unclear. We quantified soil, root,...
Article
Full-text available
The effects of abiotic and biotic factors on plant stoichiometry have been widely reported at the global scale. However, stand age has not always been considered and its effect on stoichiometry showed large uncertainties at the global scale. In this study, we examined the role of stand age in leaf N:P, and observed the general pattern of leaf N:P f...
Article
Full-text available
The plant nutrient acquisition strategies are diverse, such as root nutrient acquisition and leaf nutrient resorption, playing important roles in driving soil processes, vegetation performance as well as ecosystem nutrient cycling. However, it is still in a debate whether there is a synergy or tradeoff between above- and below-ground nutrient acqui...
Article
Full-text available
Gleditsia sinensis is a valuable tree species with important pharmaceutical uses. However, high soil NaCl concentration limits its growth in saline soil, including coastal areas. This study aimed to investigate the effects of arbuscular mycorrhizal fungi (AMF) on G. sinensis salinity tolerance and reveal its underlying physiological mechanism. A gr...
Article
Litter decomposition and nutrient release are key processes for soil C and nutrient cycling. However, the relative importance of the effects of litter quality, fauna and decomposition sites on litter decomposition remains poorly understood. Moreover, the macronutrient and micronutrient (C, N, P, K, Ca, Mg, Mn, Cu and Zn) release in the decompositio...
Article
Full-text available
Key message Torreya grandis seedlings showed significant gender difference under drought stress and females had a better performance in the process of photosynthesis. Abstract Starting with saturated moisture content, the natural drought stress process was comprehensively investigated to clarify the possible sex differences of Torreya grandis and...
Article
Question Longleaf pine (Pinus palustris) restoration is an important management objective throughout the southeastern U.S. Site preparation prior to planting longleaf pine seedlings is often required to overcome challenges to seedling establishment on hydric sites. We know site preparation improves growth and survival of planted longleaf pine on hy...
Article
Full-text available
Background To restore secondary forests (major forest resources worldwide), it is essential to accelerate the natural regeneration of dominant trees by altering micro-environments. Forest gaps are products of various disturbances, ranging from natural storms or wildfires to anthropogenic events like logging and slashing-and-burning, and sprouts of...
Preprint
Full-text available
Background Plant stoichiometry displayed flexible over age sequences in previous studies, but effect of stand age on stoichiometry showed large uncertainties for different plantations at the global scale. In this study, we want to obtain the general pattern of leaf N:P ratio for global plantations across age gradients through the compilation and an...
Article
Full-text available
Nitrogen (N) addition has a pronounced impact on tree growth and forest function, but its effects on forest structure diversity are seldom studied. In this study, we measured leaf N and phosphorus (P) stoichiometry, and diameter at breast height (DBH) in both young (N limitation) and middle-aged (P limitation) Metasequoia glyptostroboides plantatio...
Article
Full-text available
In managed orchards, fertilization brings out not only high productivity expectations but also severe environmental pollution. Because economic profit takes priority over environmental cost, increasing amounts of fertilizer have been used in mature subtropical Torreya grandis orchards. However, given the magnitude of global nitrogen deposition, it’...
Article
Full-text available
Nutrient resorption is an important strategy for nutrient conservation, particularly under conditions of nutrient limitation. However, changes in nutrient resorption efficiency with stand development and the associated correlations with ecological stoichiometry and homeostasis are poorly understood. In the study, the authors measured carbon (C), ni...
Article
The poor natural regeneration of Korean pine represents a substantial hurdle limiting the restoration of secondary forests to mixed broad-leaved Korean pine forests (MBKPFs). Active restoration based on direct seeding or planting seedlings is accordingly considered to be a prerequisite for promoting Korean pine recruitment in secondary forests. To...
Preprint
Background: Gap size and environmental gradient have fundamental influence on the tree species coexistence and community assembly. We studied the regeneration and coexistence of three co-dominant tree species in three different gap size (large gap, 201-402 m ² ; medium gap, 101-200 m ² ; small gap, 38.8-100 m ² ) along an elevation gradient (betwee...
Article
Forest gaps play an important role in tree regeneration and forest restoration in modern silviculture. Many previous studies examined gap effects on seedling survival, growth, or both but lacked a systemic assessment incorporating morphological and physiological responses to varying environmental gradients along gap size and within-gap position, wh...
Preprint
Full-text available
Forest fragmentation is increasing rapidly around the world, and edge effects caused by fragmented forests can influence ecosystem functions and ecological processes, including coarse woody debris (CWD) decomposition. Understanding the influencing mechanisms of edge effect on CWD decomposition is needed to assess the effects of forest fragmentation...
Article
Deadwood contains a sizeable proportion of total forest C, and its decomposition transfers organic C to the atmosphere , other organisms and soils. Microbes have traditionally been thought to be the primary drivers of wood decomposition worldwide, but few studies have tested the relative importance of termites to this process. The aim of this study...
Article
Full-text available
AimsAboveground litter inputs have been modified by global changes in plantation forests, where understory management is also prevalent, which may alter soil fertility and stand productivity. This study aimed to quantify the specific roles of litter and understory in affecting soil carbon (C) and nitrogen (N) dynamics.MethodsA field experiment was...
Article
Forest gaps are essential small-scale disturbances in forest succession. However, little attention has been paid to the long-term effects of gap dynamics on woody species regeneration and succession. We selected 20 medium and 25 large gaps representing a range of age classes (0–10, 10–20, 20–30, 30–40, and 40–50 years) from remote-sensing images ob...
Article
Full-text available
Establishing mixed-species plantations on the reclaimed coastal lands has become a new paradigm in forest management in China, because it increases the provision of ecosystem services. However, the mixing effects of trees with different identities remain largely understudied. In subtropical China, plantations have been historically dominated by mon...
Article
Gap formation and closure play important roles in forest succession. Most studies focused on regeneration within gaps, but less is known about the growth dynamics of canopy trees surrounding the gaps (i.e., gap border trees), which limits our understanding of the gap-filling process. In this study, terrestrial laser scanning (TLS) was used to quant...
Preprint
Full-text available
Background In managed orchards, fertilizer treatments facilitate both high productivity and environmental pollution. Because economic profit takes priority over environmental cost, increasing amounts of chemical nitrogen and phosphorus fertilizer have been used in mature subtropical Torreya grandis orchards. However, given the magnitude of global n...
Article
Full-text available
Arbuscular mycorrhizal fungi (AMF) form a near-ubiquitous mutualistic association with roots to help plants withstand harsh environments, and play a key role in the establishment of coastal beach plant communities. Yet little is known about the structure and composition of AMF communities on coastal beaches of eastern China. In this study, we inves...
Article
Full-text available
Arbuscular mycorrhizal (AM) fungi enhance plant salt tolerance. However, physiological mechanisms of enhanced salt tolerance in leaves and roots of trees rarely have been compared. To reveal the different mechanisms, our study utilized comprehensive analyses of leaves and roots to examine the effects of Funneliformis mosseae on the salinity toleran...
Article
Full-text available
Although photosynthesis (carbohydrate production) decreases under wind load, it is unclear how carbohydrate categories allocation changes. We determined the leaf morphology (specific leaf area (SLA), needle thickness), anatomy (cuticle thickness, epidermal thickness), photosynthesis (effective quantum yield of Photosystem II (Y(II)), carbohydrate (...
Article
Longleaf pine (Pinus palustris Mill.) restoration is an important land management goal throughout the southeastern U.S. On hydric sites within the Atlantic Coastal Plain, restoration may involve site preparation prior to planting to overcome challenges to seedling establishment, such as abundant competition and poor soil drainage. Investment in sit...
Article
Full-text available
Atmospheric nitrogen (N) and acid deposition have become global environmental issues and are likely to alter soil respiration (Rs); the largest CO2 source is from soil to the atmosphere. However, to date, much less attention has been focused on the interactive effects and underlying mechanisms of N and acid deposition on Rs, especially for ecosyste...
Conference Paper
Full-text available
Extended abstract-Longleaf pine (Pinus palustris Mill.) restoration is an important land management goal throughout the Southeast. On hydric sites within the Atlantic Coastal Plain, restoration may involve site preparation prior to planting in order to overcome challenges to seedling establishment, such as abundant competition and poor soil drainag...
Preprint
Full-text available
Background and AimsThe protective effects of arbuscular mycorrhizal fungi (AMF) on salt-stressed crop plants had been well studied. However, the physiological mechanism of AMF in mitigating adverse impact caused by salinity stress in different tissues of woody plants is not clear. Gleditsia sinensis Lam. is a valuable tree species with various pham...
Article
Full-text available
Forest gaps are important small-scale disturbances that initiate forest succession. However, natural regeneration patterns within gaps remain unclear, especially in temperate secondary forests. In this study, three-dimensional graphic systems were established to show the whole regeneration patterns of woody species with different shade tolerance in...
Article
Full-text available
Longleaf pine (Pinus palustris Mill.) forest is a well-known fire-dependent ecosystem. The historical dominance of longleaf pine in the southeast United States has been attributed to its adaptation known as the grass stage, which allows longleaf pine seedlings to survive under a frequent surface fire regime. However, factors affecting post-fire sur...
Article
Full-text available
A predicted impact of a warming climate is an upslope shift of montane plant species. These upslope shifts may be amplified by land-use changes or attenuated by forest recoveries at low elevations where historical disturbances were ceased allowing for plant regrowth. Consequently, species may shift downslope back to low elevations where they had be...
Article
The degree of stoichiometric homeostasis can be indicated by the homeostatic coefficient (H), which reflects the ability of plants to maintain a stable nutrient composition regardless of changes in environmental nutrients. In previous studies, H had been determined primarily in herbs and varied significantly among organs and growth stages. However,...
Article
Full-text available
Background and aims Anthropogenic activities have increased nitrogen (N) and phosphorus (P) inputs to terrestrial ecosystems, which may significantly alter P cycle through accumulation and resorption. Methods We measured the concentrations of four different P fractions (inorganic, nucleic, sugar, and residual P) in both live leaves and senescent l...
Article
Full-text available
Background and aims Nitrogen (N) deposition affects litter decomposition. However, how nutrients, especially deposited N are immobilized and released in decomposing litters with different qualities (C/N and C/P) remains unclear. Methods We conducted a laboratory microcosm experiment with four litter types and a combination of a coniferous and deci...
Article
Key message The gap dynamics in the studied secondary forest were comparable to those of other temperate forests; large openings were filled within 30 years by afforestation; large and medium gaps closed 30–40 years after they formed. Context Gaps have important roles in forest regeneration and plant succession. However, it is difficult to determi...
Article
Previous studies have found that home-field advantage (HFA)appears to be widespread in the decomposition of litter, but few studies have examined HFA in the decomposition of coarse woody debris (CWD)in forest ecosystems. To test the HFA hypothesis for CWD decomposition, we quantified the respiration of CWD (R CWD )for different tree species over a...
Article
Full-text available
The Chinese honey locust tree Gleditsia sinensis Lam. (Fabaceae) is a precious ecological and economic tree species that has wide-ranging usage. However, knowledge regarding seedling cultivation (especially the use of arbuscular mycorrhizal fungi (AMF)) is scarce, which limits the developent of Gleditsia plantations. A pot experiment was carried ou...
Article
Full-text available
Arbuscular mycorrhizal fungi (AMF) play an important role in the establishment and maintenance of plant communities in forest ecosystems. Most previous studies about AMF have been conducted in natural forests, and little attention has been paid to trees in planted forests. This study investigated AMF associated with tree species and the relationshi...
Article
Increases in nitrogen (N) deposition and ultraviolet-B (UV-B) radiation play an important role in global climate change. Because coarse woody debris (CWD) represents a sizeable proportion of total carbon (C) pool in forest ecosystems, understanding the response of CWD decomposition to increased UV-B and N deposition become necessary for evaluating...
Article
Full-text available
Background and aims Atmospheric nitrogen (N) deposition affects litter decomposition. However, how endogenous litter quality and exogenous resource supply alter the N deposition effect on litter decomposition and deposited N immobilized by microbes remains unclear. Methods We conducted a laboratory experiment to examine how the N deposition effect...
Article
Full-text available
Abstract: Research Highlights: This study identifies the nitrogen (N) deposition effect on understory plants by altering directly soil nutrients or indirectly altering environmental factors in subtropical plantation. Background and Objectives: N deposition is a major environmental issue and has altered forest ecosystem components and their function...
Article
Full-text available
Background: Longleaf pine (Pinus palustris Mill.) seedlings have a morphological “grass stage” that is considered to be an adaptation to frequent surface fire regimes. However, fire can kill longleaf pine seedlings and thus may play an important role in longleaf pine regeneration dynamics. We used a prescribed burn simulation tool designed to treat...
Article
Full-text available
Global change induced biodiversity loss has greatly affected ecosystem functioning, and thus the multiple services delivered by the ecosystem. Considerable recent works have focused on evaluating how species diversity changes impacts multiple ecosystem functions and services simultaneously (called ecosystem multifunctionality, EMF), but none of the...
Article
Full-text available
Key message Homeostatic regulation coefficient (H) exists for trees and the tree species with higher H are more stable in physiological and growth responses to nutrient addition. Abstract Stoichiometric homeostasis, indicated by the homeostasis regulation coefficient (H), is closely related to evolutionary stage, and can reflect physiological and...
Article
Previous studies on gap regeneration have seldom addressed potential differences due to within-gap position, condition of forest type and within-gap vegetation competition. We excluded understorey vegetation competition, and tested the effects of gap size, within-gap position and forest type on the survival of three species with contrasting shade t...
Conference Paper
Full-text available
We designed several treatments to directly control an invasive tree, Chinese tallow [Triadica sebifera (L.) Small] on Parris Island Marine Corps Recruit Depot located in Beaufort, SC. We examined the response of the plant community to four treatment series: 1) control (C), 2) mastication (M), 3) fire (F), and 4) combination of mastication and fire...
Article
The total biomass of a stand is an indicator of stand productivity and is closely related to the density of plants. According to the self-thinning law, mean individual biomass follows a negative power law with plant density. If the variance of individual biomass is constant, we can expect increased stand productivity with increasing plant density....
Article
The influence of acid rain on plant growth includes direct effects on foliage as well as indirect soil-mediated effects that cause a reduction in root growth. In addition, the concentration of NO3- in acid rain increases along with the rapid growth of nitrogen deposition. In this study, we investigated the impact of simulated acid rain with differe...