Deli Wang's research while affiliated with Northeast Normal University and other places

Publications (155)

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Climate and land-use change are some of the most profound threats to the biodiversity and functioning of the Earth’s ecosystems. However, potential synergistic effects of these drivers through biodiversity change on ecosystem functioning remain unclear. Here we examined how aridity and land-use (overgrazing and haying) affect above-ground biomass a...
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Aim Variations in plant traits are closely linked to the functional trade-off between resource acquisition and conservation. However, there has been little research on interspecific variations in the traits of fine roots with different orders and their associations with leaf traits in semiarid inland dunes. Methods We examined the first four root...
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Phenotypic plasticity is widespread in all organisms. This biological property is particularly important for sessile organisms like plants to cope with the ever-changing environmental conditions. Leymus chinensis is a predominantly clonal grass that adapts to diverse stressful habitats including drought, cold and salinity-alkalinity. Previous studi...
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Predator-prey interactions are ubiquitous and powerful forces that structure ecological communities.1, 2, 3 Habitat complexity has been shown to be particularly important in regulating the strength of predator-prey interactions.4, 5, 6 While it is well established that changes in habitat structure can alter the efficacy of predatory and anti-predat...
Preprint
Soil extracellular enzymes are central in terrestrial ecosystem responses to climate change, and their research can be crucial for assessing microbial nutrient demand. However, the effects of climate-induced precipitation patterns on soil microbial nutrient demand in different soil profiles of agroecosystems are rarely studied. Here, we present how...
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While large herbivores are critically important components of terrestrial ecosystems and can have pronounced top‐down effects on plants, our understanding of the underlying mechanisms driving these effects remains incomplete. Large herbivores can alter plant growth, reproduction and abundance through direct effects (predominantly consumption) and t...
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Grassland insect diversity in many parts of the world is severely threatened by recent deterioration caused by global change and human activities. Insect species richness and abundance are likely sensitive to grassland degradation because of changes in vegetation structure and microclimates, and yet, our understanding of how diversity of insect com...
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The mercury that is released from the centralized treatment of municipal solid waste is an important source of atmospheric mercury. We chose the main urban area of Changchun as a representative area. Environmental factors such as total mercury content, temperature, wind speed, and other factors were measured in samples from the trash cans of two ty...
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Large herbivores often co-occur and share plant resources with herbivorous insects in grassland ecosystems; yet, how they interact with each other remains poorly understood. We conducted a series of field experiments to investigate whether and how large domestic herbivores (sheep; Ovis aries) may affect the abundance of a common herbivorous insect...
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In grasslands, roots of different plant species decay in combination in the presence of living plants, besides, most root decomposition studies are conducted on how roots of plants decomposed alone or in artificial compositions in the absence of living plants. Therefore, we evaluated how roots of different perennial plants induced effects on decomp...
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Grassland soils represent a significant potential pool for sequestering of atmospheric CO2; however, the magnitude of this pool depends to a certain extent on grazing management in grassland. Whether different herbivore species and combination (herbivore assemblage) influence soil organic carbon (SOC) in various grasslands remains unclear. Here we...
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As a prominent component of the terrestrial biosphere, soil nematodes constitute a potential indicator for biomonitoring systems. Although nematodes respond to environmental variables or gradients, the mechanism and reason of changes in nematode assemblages with the retrogression of grasslands induced by overgrazing remain poorly understood. This s...
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Grassland degradation is a retrogressive succession of grassland vegetation, which leads to the loss of biodiversity and the degradation of ecosystem functions. Soil microbiomes play critical roles in the functioning and services of grassland ecosystems, yet little is known about how their diversity, structure and co-occurrence network characterist...
Article
Mercury (Hg) is a global and widely distributed heavy metal pollutant. Mercury can affect human health as well as the health of ecosystems and poses ecological risks. The subjects of this study are three types of grassland in the Beidianzi region, Songnen Plains, Northeastern China, characterized by different degrees of degradation. The mercury con...
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Mercury is a global pollutant. The mercury exchanges between vegetation and the atmosphere are important for the global mercury cycle. Grassland ecosystems occupy more than 25% of the global land area and have different succession processes and ecological functions. The current research regarding mercury exchanges between forests and the atmosphere...
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Mercury (Hg) is a global pollutant that may potentially have serious impacts on human health and ecologies. The gaseous elemental mercury (GEM) exchanges between terrestrial surfaces and the atmosphere play important roles in the global Hg cycle. This study investigated GEM exchange fluxes over two land cover types (including Artemisia anethifolia...
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AimsChanges caused by single herbivore species grazing to soil and plant interfaces can significantly affect the leaf litter decomposition rates within ecosystems. However, we intended to study how grazing by multiple herbivore species regulate the litter decomposition process and associated soil or plant properties in Leymus chinensis dominant mea...
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Livestock grazing and atmospheric nitrogen (N) deposition have been reported as important factors affecting soil communities. However, how different large herbivore grazing and N addition may interact to affect soil biota in grassland ecosystems is unclear. Nematodes are the most abundant metazoan in soil ecosystems, play critical roles in regulati...
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Wetlands are among the natural ecosystems with the highest soil carbon stocks on Earth. However, how anthropogenic disturbances have impacted the quantity and distribution of wetland carbon pool in China is not well understood. Here we used a comprehensive countrywide wetland inventory and Landsat 8 data to document the spatial patterns in China's...
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Whether merger of two divergent genomes by hybridization at the homoploid level or coupled with WGD (allopolyploidy) can bestow plants better tolerance to stress conditions remains understudied. In this study, two diploid rice (Oryza sativa L.) subspecies, japonica, and indica, their reciprocal F1 hybrids and segmental allotetraploids were compared...
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Large herbivores and insects commonly coexist and play important functional roles in grassland ecosystems. The interactive effects of these two animal groups in shaping ecosystem processes and functioning are poorly understood. In a semi‐arid grassland of northeastern China, we previously found a reciprocal facilitation between large herbivores (ca...
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Introduced ecosystem engineers are expected to have extensive ecological impacts on a broad range of resident biota by altering the physical–chemical structure of ecosystems. Livestock that are potentially important introduced ecosystem engineers in grassland systems could create and/or modify habitats for native plant-dwelling insects. Yet, there...
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Litter decomposition is a fundamental path for nutrient cycling in a natural ecosystem. However, it remains unclear how species diversity, including richness and evenness, affects the decomposition dynamics in the context of grassland degradation. Using a litter bag technique, we investigated the litter-mixing effects of two coexisting dominant spe...
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Understanding the processing of limiting nutrients among organisms is an important goal of community ecology. Less known is how human disturbances may alter the stoichiometric patterns among organisms from different trophic levels within communities. Here, we investigated how livestock grazing affects the C:N:P ecological stoichiometry of soils, pl...
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Plant-associated endophytic microorganisms are essential to developing successful strategies for sustainable agriculture. Grazing is an effective practice of grassland utilization through regulating multitrophic relationships in natural grasslands. This study was conducted for exploring the effects of grazing on the diversities and communities of b...
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The interplay between top‐down and bottom‐up processes determines ecosystem productivity. Yet, the factors that mediate the balance between these opposing forces remain poorly understood. Furthering this challenge, complex and often cryptic factors like ecosystem engineering and trait‐mediated interactions may play major roles in mediating the outc...
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The trade-offs between sexual reproduction and clonal propagation are of great significance in terms of ecology and evolution for clonal plants, and they vary with environmental change. Nitrogen (N) deposition can increase litter accumulation in grassland and promote litter decomposition and consequently increase nutrient availability. However, the...
Article
Arbuscular mycorrhizal fungi (AMF) play a crucial role in ecosystem functioning in terrestrial ecosystems. However, we know little about how AMF communities shift in response to key climatic changes. To test whether precipitation is a driving force in shaping AMF community structure, we conducted a 3-year field experiment to investigate the impacts...
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Clonal plants play key roles in maintaining community productivity and stability in many ecosystems. Connected individuals (ramets) of clonal plants can translocate and share, for example, photosynthates, water and nutrients, and such physiological integration may affect performance of clonal plants both in heterogeneous and homogeneous environment...
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The possible effects of climate change on species interactions remain a very complex and challenging subject in community ecology. Here, we comparatively examine the interactions between maize (Zea mays) and an endophytic fungal entomopathogen (Beauveria bassiana) in a typical agroecosystem under both ambient and elevated air temperatures. We found...
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A better understanding of how grazing by large herbivores, as the major land use worldwide, affects grassland carbon fluxes is critical for predicting future uptake of CO2 in terrestrial ecosystem. Previous studies have focused on individual herbivore species; it remains poorly understood as to if and how herbivore assemblage (single vs. mixed spec...
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Grazing management plays an important role in grassland conservation. Given that grasshoppers are key components in the grassland food web, various studies have been conducted to investigate the effects of grazing by large herbivores on grasshoppers at population and community levels. However, grazing effects on grasshopper fitness and abundance re...
Article
1. Adaptive phenotypic plasticity has been a major subject in evolutionary ecology, but how a species' behaviour may respond to certain environmental change is still not clear. In grasslands worldwide, large herbivores are increasingly used as a tool for grazing management, and occur to interact with grasshoppers that dominate grassland insect comm...
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Nonnative species have invaded most parts of the world and this process is expected to accelerate. As many naturalized nonnative species are likely to become permanent inhabitants, future species-area relationships (SARs) should consider nonnative species, either separately or jointly with native species. If nonnative species are occupying unused n...
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Large herbivores grazing is a major disturbance that can cause significant changes of soil environment in grassland ecosystems. However, it remains unclear how soil microbial metabolic activity responses to different grazing intensities. We analyzed the relationships between soil microbial carbon source utilization and grazing intensity, and furthe...
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1. The spatial heterogeneity of soil limiting resources is one of the most important factors maintaining biodiversity and ecosystem functions. There is a general concern that herbivore grazing plays a central role in modifying soil resources heterogeneity. However, most studies have examined how large herbivores as a group affect soil heterogeneity...
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Melatonin, a ubiquitous molecule found in almost all organisms, is considered an important regulator in plant growth. However, little is known about the interactive effect of melatonin and arbuscular mycorrhizal (AM) fungi on plant resistance against soil salinity and alkalinity. To fill in such a gap in knowledge, we conducted three experiments to...
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Livestock overgrazing influences both microbial communities and nutrient cycling in terrestrial ecosystems. However, the role of overgrazing in regulating the relationship between soil biodiversity and nitrogen availability remains largely unexplored. We performed long‐term grazing exclusion experiments across eight sites along precipitation gradie...
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Background and aimsUnderstanding the influences of environmental variation and anthropogenic disturbance on soil respiration (RS) is critical for accurate prediction of ecosystem C uptake and release. However, surprisingly, little is known about how soil respiration and its components respond to grazing in the context of global climate change (i.e....
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Livestock grazing can have a strong impact on herbivore abundance, distribution and community. However, not all species of herbivores respond the same way to livestock grazing, and we still have a poor understanding of the underlying mechanisms driving these differential responses. Here, we investigate the effect of light intensity cattle grazing o...
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Rangeland degradation continues in Australia, China and elsewhere. The stocking rate/animal production relationship has been a successful concept for pastoralists wanting to avoid degradation and/or raise incomes. However, there are no means available of alerting pastoralists to the approach of critical thresholds that would ‘flip’ rangelands into...
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Background and aims The development of fertile patches within an infertile matrix is a common phenomenon in drylands. Shrub-centered expansion of fertile islands is generally attributed to processes of sediment erosion and deposition, but there have been fewer studies of how litter might contribute to the development of fertile islands in semiarid...
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(EN)1.Interactions between distantly related herbivores exert powerful influences on ecosystems, but most studies to date have only considered unidirectional effects. Few have simultaneously examined the mutual effects that vertebrate herbivores and insect herbivores have on one another. 2. We conducted a set of manipulative experiments to evaluate...
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In present study 45 exotic Phaseolus vulgaris (L.) genotypes were assessed for assessment of genetic diversity through morphological & biochemical (SDS-PAGE) traits and selection of high yielding genotypes. One ways cluster dendrogram analysis of morphological traits segregated total genotypes to 2-lineages, lineages-1 and-2, separated at 80% simil...
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1.Global environmental changes are altering ecosystem stability, sometimes by altering biodiversity. For example, by driving grassland plant species loss, nitrogen (N) addition can reduce ecosystem stability. In other cases, however, N addition may alter productivity and ecosystem stability, by increasing the dominance of particularly productive or...
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The Jiapigou gold mine area, located in the upper reaches of the Songhua River, was the first and largest artisanal gold mine once in China, and it used to be prominent in two marking years (1870 and 1974). Jiapigou area had a gold mining history of more than 190 years, which was first opened in 1820. Gold extraction with algamation was applied as...
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[Context] Boundaries may have crucial influences on landscape patterns, processes, and dynamics. However, there is little understanding of mechanisms that govern changes in the location and composition of boundaries. At smaller scales, investigation of detailed soil and vegetation characteristics can clarify the linkages between soil properties an...
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Increasing plant diversity can increase ecosystem functioning, stability, and services in both natural and managed grasslands, but the effects of herbivore diversity, and especially of livestock diversity, remain underexplored. Given that managed grazing is the most extensive land use worldwide, and that land managers can readily change livestock d...
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Soil carbon and nutrients play vital roles in ecosystem services. Many previous studies documented carbon or nutrient accumulation and the relevant impacting factors, and emphasized the soil physical structure, especially soil aggregates, that might play a key role in grasslands or farmlands. Unfortunately, there is little known about the relations...
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Livestock and small burrowing mammals are potential ecosystem engineers and major drivers of ecosystem processes. Small mammals, often considered competitors with livestock, have been reported to increase in recent years and have been identified for their negative impacts on ecosystem services such as plant production and soil carbon sequestration....
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Common practices for invasive species control and management include physical, chemical, and biological approaches. The first two approaches have clear limitations and may lead to unintended (negative) consequences, unless carefully planned and implemented. For example, physical removal rarely completely eradicates the targeted invasive species and...
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1.Classic theory holds that the main interaction within the herbivore guild is competition, based on research focused on co‐occurring, similarly‐sized species that reduce the quantity of shared plant resources. However, plant quality may also be crucial in mediating herbivore interspecific interactions. This is especially true when competition occu...
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Atmospheric nitrogen (N) deposition reduces plant diversity. However, it often remains unclear how dominant species and litter accumulation feedbacks mediate N-induced plant diversity declines. We tested mechanisms of N-induced diversity change through dominant grasses and litter in a 7-year field experiment. Nitrogen addition reduced species richn...
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Background and aims Nitrogen deposition and altered precipitation regime are likely to change plant growth, biomass allocation and community structure, which may influence susceptibility of ecosystem functions (i.e. ecosystem carbon exchange) to extreme climatic events, such as drought. Methods In a meadow steppe, we deployed a drought treatment o...