17 Works

Grazing-induced biodiversity loss impairs grassland ecosystem stability at multiple scales

Maowei Liang, Cunzhu Liang, Yann Hautier, Kevin Wilcox & Shaopeng Wang
Livestock grazing is a major driver shaping grassland biodiversity, functioning, and stability. Whether grazing impacts on grassland ecosystems are scale-dependent remains unclear. Here, we conducted a sheep-grazing experiment in a temperate grassland to test grazing effects on the temporal stability of productivity across scales. We found that grazing increased species stability, but substantially decreased local community stability due to reduced asynchronous dynamics among species within communities. The negative effect of grazing on local community stability...

Data from: Grazing effect on grasslands escalated by abnormal precipitations in Inner Mongolia

Maowei Liang, Jiquan Chen, Elise S. Gornish, Zhiyong Li, Xue Bai & Cunzhu Liang
1. Grazing effects on arid and semi-arid grasslands can be constrained by aridity. Plant functional groups (PFGs) are the most basic component of community structure (CS) and biodiversity & ecosystem function (BEF). They have been suggested as identity-dependent in quantifying the responses to grazing intensity and drought severity. Here we examine how the relationships among PFGs, CS, BEF, and grazing intensity are driven by climatic drought. 2. We conducted a manipulative experiment with three grazing...

Data from: Feces nitrogen release induced by different large herbivores in a dry grassland

Jingzhi Wang, Deli Wang, Chunqiang Li, Timothy R. Seastedt, Cunzhu Liang, Ling Wang, Wei Sun, Maowei Liang & Yu Li
Large herbivores have pronounced effects on nutrient cycling in grasslands. These organisms are known to alter the quality and quantity of plant production as well as the amounts and quality of plant litter and animal wastes. The generalization that the relative quality of detritus inputs is enhanced by herbivores is well known, but how this process is affected by diet selection processing and feces production of different large herbivores remains largely unstudied. Here, we measured...

Data from: Phylogenetic structure and formation mechanism of shrub communities in arid and semi-arid areas of the Mongolian Plateau

Lei Dong, Ying Zheng, Zhiyong Li, Jinghui Zhang, Bailing Miao, Chengzhen Jia, Cunzhu Liang, Lixin Wang & Frank Li
The mechanisms of species coexistence within a community have always been the focus in ecological research. Community phylogenetic structure reflects the relationship of historical processes, regional environments and interactions between species, and studying it is imperative to understand the formation and maintenance mechanisms of community composition and biodiversity. We studied the phylogenetic structure of the shrub communities in arid and semiarid areas of the Mongolian Plateau. First, the phylogenetic signals of four plant traits (height,...

High-efficient fabrication of core-shell-shell structured SiO2@GdPO4:Tb@SiO2 nanoparticles with improved luminescence

He Bai, Yun-Jiang Yang, Jin-Rong Bao, An-Ping Wu, Yan Qiao, Xue-Yuan Guo, Ming-Yuan Wang, Wen-Xian Li, Ying Liu & Xiao-Wei Zhu
SiO2@GdPO4:Tb@SiO2 nanoparticles with core-shell-shell structure were successfully synthesized by a cheap silane coupling agent grafting method at room temperature. This method not only homogeneously coated rare earth phosphate nanoparticles on the surface of silica spheres, but also saved the use of rare earth resources. The obtained nanoparticles are consisted of SiO2 core with a diameter of ~210 nm, GdPO4:Tb intermediate shell with thickness of ~7 nm, and SiO2 outer shell with thickness of ~20 nm....

Phytolith-occluded carbon sequestration potential in three major steppe types along a precipitation gradient in Northern China

Limin Qi, Xudong Guo, Ying Guo, Frank Yonghong Li & Tingyu Sun
Phytolith-occluded carbon (PhytOC) is an important long-term stable carbon fraction in grassland ecosystems, and plays a promising role in global carbon sequestration. Determination of the PhytOC traits of different plants in major grassland types is crucial for precisely assessing their phytolith carbon sequestration potential. Precipitation is the predominant factor in controlling net primary productivity (NPP) and species composition of the semiarid steppe grasslands. We selected three representative steppe communities of the desert steppe, the dry...

Shifts in plant composition mediate grazing effects on carbon cycling in grasslands

Maowei Liang, Nicholas Smith, Jiquan Chen, Yantao Wu, Zhiwei Guo, Elise Gornish & Cunzhu Liang
Carbon cycling in grasslands can be impacted by livestock grazing, partially as an indirect result of herbivory-induced compositional shifts in the plant community. However, the underlying mechanisms of how these shifts impact carbon cycling are not well documented. We conducted a long-term grazing experiment with four sheep stocking rates in the semi-arid grasslands of Inner Mongolia, China, to examine grazing effects on the ratio of C3 to C4 species (C3:C4), shoot biomass, root biomass, root:shoot,...

Data from: Adsorption of heavy metal with modified eggshell membrane and in situ synthesis of Cu-Ag/MESM composites

Yaqing Xin, Caihong Li, Jianing Liu, Jinrong Liu, Yuchen Liu, Weiyan He & Yanfang Gao
The objectives of this study were to remove heavy metals from wastewater through biosorption method with modified biomass as both effective sorbent and prepare metal/biomass composites with the same modified biomass as direct template. Eggshell membrane (ESM) was selected and modified to adsorb heavy metals. Adsorption of metal ions on the modified ESM (MESM) might be attributed to electrostatic interaction, ion exchange and coordination effect with chelating ligands containing N and S on the surface...

Data from: Impacts of environmental heterogeneity on moss diversity and distribution of Didymodon (Pottiaceae) in Tibet, China

Shanshan Song, Xuehua Liu, Xueliang Bai, Yanbin Jiang, Xianzhou Zhang, Chengqun Yu & Xiaoming Shao
Tibet makes up the majority of the Qinghai-Tibet Plateau, often referred to as the roof of the world. Its complex landforms, physiognomy, and climate create a special heterogeneous environment for mosses. Each moss species inhabits its own habitat and ecological niche. This, in combination with its sensitivity to environmental change, makes moss species distribution a useful indicator of vegetation alteration and climate change. This study aimed to characterize the diversity and distribution of Didymodon (Pottiaceae)...

Data from: Biotic stability mechanisms in Inner Mongolian grassland

Yonghui Wang, Xiaxia Niu, Liqing Zhao, Cunzhu Liang, Bailing Miao, Qing Zhang, Jinghui Zhang, Bernhard Schmid & Wenhong Ma
Biotic mechanisms associated with species diversity are expected to stabilize communities in theoretical and experimental studies but may be difficult to detect in natural communities exposed to large environmental variation. We investigated biotic stability mechanisms in a multi-site study across Inner Mongolian grassland characterized by large spatial variations in species richness and composition and temporal fluctuations in precipitation. We used a new additive-partitioning method to separate species synchrony and population dynamics within communities into different...

Data from: Livestock overgrazing disrupts the positive associations between soil biodiversity and nitrogen availability

Ling Wang, Manuel Delgado-Baquerizo, Xuan Zhao, Minna Zhang, Yueqing Song, Jinting Cai, Qing Chang, Zhiqiang Li, Ying Chen, Jushan Liu, Hui Zhu, Deli Wang, Guodong Han, Cunzhu Liang, Chengjie Wang & Xiao-Ping Xin
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 gradient covering three major types of grassland in northern China to compare the linkage between soil microbial diversity and N availability in overgrazed versus non-grazed conditions. We found a positive association between fungal diversity...

Replaying the evolutionary tape to investigate subgenome dominance in allopolyploid Brassica napus

Kevin Bird, Chad Niederhuth, Shujun Ou, Malia Gehan, J. Chris Pires, Zhiyong Xiong, Robert VanBuren & Patrick Edger
Interspecific hybridization and allopolyploidization merge evolutionarily distinct parental genomes (subgenomes) into a single nucleus. A frequent observation is that one subgenome is "dominant” over the other subgenome, having a greater number of retained genes and being more highly expressed. Which subgenome becomes dominantly expressed in allopolyploids remains poorly understood. Here we “replayed the evolutionary tape” with six isogenic resynthesized Brassica napus (rapeseed) allopolyploid lines and investigated subgenome dominance patterns over the first ten generations post...

Data from: Dryland soils in northern China sequester carbon during the early-2000s warming hiatus period

Dan Kou, Wenhong Ma, Jinzhi Ding, Beibei Zhang, Kai Fang, Huifeng Hu, Jianchun Yu, Tian Wang, Shuqi Qin, Xia Zhao, Jingyun Fang & Yuanhe Yang
1. Drylands, covering ~45% of the Earth’s terrestrial surface and supporting ~38% of the global population, play a dominant role in the trend and inter-annual variability of global land carbon (C) sink. Given that a large proportion of organic C is stored in soils, our knowledge on soil C dynamics in drylands is crucial to evaluate terrestrial C-climate feedback. However, credible understanding on this issue is still greatly limited by the lack of direct observations....

A dataset of plant and microbial community structure after long-term grazing and mowing in a semiarid steppe

Wenhuai Li, Jasna Hodzic, Jishuai Su, Shuxia Zheng & Yongfei Bai
Grazing and mowing are two dominant management regimes used in grasslands. Although many studies have focused on the effects of grazing intensity on plant community structure, far fewer test how grazing impacts the soil microbial community. Furthermore, the effects of long-term grazing and mowing on plant and microbial community structure are poorly understood. To elucidate how these management regimes affect plant and microbial communities, we collected data from 280 quadrats in a semiarid steppe after...

Land use alters relationships of grassland productivity with plant and arthropod diversity in Inner Mongolian grassland

Xinyu Wang, Frank Yonghong Li, Kuanyan Tang, Yanan Wang, Guga Suri, Zheng Bai & Taogetao Baoyin
The threats of land-use intensification to biodiversity have motivated considerable research directed towards understanding the relationship between biodiversity and ecosystem functioning (BEF). Functional diversity is deemed a better indicator than species diversity to clarify the BEF relationships. However, most tests of the BEF relationship have been conducted in highly controlled plant communities, with terrestrial animal communities largely unexplored. Additionally, most BEF studies examined the effects of biodiversity on ecosystem functions, with the effects of ecosystem...

Data from: Brassicales phylogeny inferred from 72 plastid genes: a reanalysis of the phylogenetic localization of two paleopolyploid events and origin of novel chemical defenses

Patrick P. Edger, Jocelyn C. Hall, Alex Harkess, Michelle Tang, Jill Coombs, Setareh Mohammadin, M. Eric Schranz, Zhiyong Xiong, James Leebens-Mack, Blake C. Meyers, Kenneth J. Systma, Marcus A. Koch, Ihsan A. Al-Shehbaz, J. Chris Pires & Kenneth J. Sytsma
PREMISE OF THE STUDY - Previous phylogenetic studies employing molecular markers have yielded various insights into the evolutionary history across Brassicales, but many relationships between families remain poorly supported or unresolved. A recent phylotranscriptomic approach utilizing 1155 nuclear markers obtained robust estimates for relationships among 14 of 17 families. Here we report a complete family‐level phylogeny estimated using the plastid genome. METHODS - We conducted phylogenetic analyses on a concatenated data set comprising 44,926 bp...

Data from: Preparation, characterization and luminescence properties of core–shell ternary terbium composites SiO2(600)@Tb(MABA-Si)•L

Yang-Yang Ma, Wen-Xian Li, Yu-Shan Zheng, Jin-Rong Bao, Yi-Lian Li, Li-Na Feng, Kui-Suo Yang, Yan Qiao & An-Ping Wu
Two novel core-shell structure ternary terbium composites SiO2(600)@Tb(MABA-Si)•L(L:dipy/phen) nanometer luminescence materials were prepared by ternary terbium complexes Tb(MABA-Si)•L2•(ClO4)3•2H2O shell grafted onto the surface of SiO2 microspheres. And corresponding ternary terbium complexes were synthesized using (CONH(CH2)3Si(OCH2CH3)3)2 (denoted as MABA-Si) as first ligand and L as second ligand coordinated with terbium perchlorate. The as-synthesized products were characterized by means of IR spectra, 1HNMR, element analysis, molar conductivity, SEM and TEM. It found that the first ligand MABA-Si...

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