35 Works

Data from: Long-term antagonistic effect of increased precipitation and nitrogen addition on soil respiration in a semiarid steppe

Hongyan Han, Yue Du, Dafeng Hui, Lin Jiang, Mingxing Zhong & Shiqiang Wan
Changes in water and nitrogen (N) availability due to climate change and atmospheric N deposition could have significant effects on soil respiration, a major pathway of carbon (C) loss from terrestrial ecosystems. A manipulative experiment simulating increased precipitation and atmospheric N deposition has been conducted for 9 years (2005–2013) in a semiarid grassland in Mongolian Plateau, China. Increased precipitation and N addition interactively affect soil respiration through the 9 years. The interactions demonstrated that N...

Data from: Nonlinearity of root trait relationships and the root economics spectrum

Deliang Kong, Junjian Wang, Huifang Wu, Oscar J. Valverde-Barrantes, Ruili Wang, Hui Zeng, Paul Kardol, Haiyan Zhang & Yulong Feng
The root economics spectrum (RES), a common hypothesis postulating a tradeoff between resource acquisition and conservation traits, is being challenged by conflicting relationships between root diameter, tissue density (RTD) and root nitrogen concentration (RN). Here, we analyze a global trait dataset of absorptive roots for over 800 plant species. For woody species (but not for non-woody species), we find nonlinear relationships between root diameter and RTD and RN, which stem from the allometric relationship between...

Data from: An alternative approach to reduce algorithm-derived biases in monitoring soil organic carbon changes

Weixin Zhang, Yuanqi Chen, Leilei Shi, Xiaoli Wang, Yongwen Liu, Rong Mao, Xingquan Rao, Yongbiao Lin, Yuanhu Shao, Xiaobo Li, Cancan Zhao, Shengjie Liu, Shilong Piao, Weixing Zhu, Xiaoming Zou & Shenglei Fu
Quantifying soil organic carbon (SOC) changes is a fundamental issue in ecology and sustainable agriculture. However, the algorithm-derived biases in comparing SOC status have not been fully addressed. Although the methods based on equivalent soil mass (ESM) and mineral-matter mass (EMMM) reduced biases of the conventional methods based on equivalent soil volume (ESV), they face challenges in ensuring both data comparability and accuracy of SOC estimation due to unequal basis for comparison and using un-conserved...

Increasing flavonoid concentrations in root exudates enhance associations between arbuscular mycorrhizal fungi and an invasive plant

Baoliang Tian, Yingchun Pei, Wei Huang, Jianqing Ding & Evan Siemann
Many invasive plants have enhanced mutualistic arbuscular mycorrhizal (AM) fungal associations, however, mechanisms underlying differences in AM fungal associations between introduced and native populations of invasive plants have not been explored. Here we test the hypothesis that variation in root exudate chemicals in invasive populations affects AM fungal colonization and then impacts plant performance. We examined flavonoids (quercetin and quercitrin) in root exudates of native and introduced populations of the invasive plant Triadica sebifera and...

Retention fraction of 15N-labelled deposited ammonium and nitrate in forests

Geshere Abdisa Gurmesa, Ang Wang, Shanlong Li, Shushi Peng, Wim De Vries, Per Gundersen, Philippe Ciais, Oliver L Phillips, Erik Hobbie, Weixing Zhu, Knute Nadelhoffer, Yi Xi, Edith Bai, Tao Sun, Dexiang Chen, Wenjun Zhou, Yiping Zhang, Yingrong Guo, Jiaojun Zhu, Lei Duan, Dejun Li, Keisuke Koba, Enzai Du, Guoyi Zhou, Xingguo Han … & Yunting Fang
The impacts of enhanced nitrogen (N) deposition on global forest carbon (C) sink and other ecosystem services may depend on whether N is deposited in reduced (mainly as ammonium) or oxidized forms (mainly as nitrate) and the subsequent fate of each. However, the fates of the two key reactive N forms and its contribution to forest C sink is unclear. We conducted ecosystem-scale paired 15N-labelling experiments in nine forests across China to quantify N retention...

Data from: Environmental changes drive the temporal stability of semi-arid natural grasslands through altering species asynchrony

Zhuwen Xu, Haiyan Ren, Mai-He Li, Jasper Van Ruijven, Xingguo Han, Shiqiang Wan, Hui Li, Qiang Yu, Yong Jiang & Lin Jiang
Stability is an important property of ecological systems, many of which are experiencing increasing levels of anthropogenic environmental changes. However, how these environmental changes influence ecosystem stability remains poorly understood. We conducted an 8-year field experiment in a semi-arid natural grassland to explore the effects of two common environmental changes, precipitation and nitrogen enrichment, on the temporal stability of plant above-ground biomass. A split-plot design, with precipitation as the main plot factor and nitrogen as...

Klingelhöfer-Sun narrative macroprudential policy index for China

Rongrong Sun & Jan Klingelhöfer
Klingelhöfer and Sun (2019) develop a narrative index (Klingelhöfer-Sun-MPP index) on a monthly basis over the 2000-2015 period to measure the PBC's macroprudential policy stance. It is comprised of four policy tool indicators (required reserve ratio, window guidance, housing policy, supervision) and one overall indicator. It is a three-value index. The policy stance of 1 stands for tightening, indicating that policy actions are taken to promot financial stability; 0 for a neutral macroprudential policy stance;...

Data from: Effects of nitrogen addition and mowing on rodent damage in an Inner Mongolian steppe

Yinzhan Liu, Gaigai Ma, Zhiman Zan, Anqun Chen, Yuan Miao, Dong Wang & Renhui Miao
Rodent damage is a serious threat to sustainable management of grassland. The effects of nitrogen (N) deposition and grassland management on rodent damage have been scarcely studied. Here, we reported the effects of two years of N addition and mowing on burrow density and damage area of Citellus dauricus in a semi-arid steppe in Inner Mongolia. N addition significantly aggravated, while mowing alleviated rodent damage in the grassland under study. Burrow density and damage area...

Data from: Resource addition drives taxonomic divergence and phylogenetic convergence of plant communities

Xian Yang, Guoyong Li, Shao-Peng Li, Qianna Xu, Huanhuan Song, Danyu Sun, Mingxing Zhong, Zhenxing Zhou, Jian Song, Jingyi Ru, Shiqiang Wan & Lin Jiang
1. Anthropogenic environmental changes are known to affect the Earth’s ecosystems. However, how these changes influence assembly trajectories of the impacted communities remains a largely open question. 2. In this study, we investigated the effect of elevated nitrogen (N) deposition and increased precipitation on plant taxonomic and phylogenetic β-diversity in a 9-year field experiment in the temperate semi-arid steppe of Inner Mongolia, China. 3. We found that both N and water addition significantly increased taxonomic...

Data from: Root feeding larvae increase their performance by inducing leaf volatiles that attract aboveground conspecific adults

Xiao Sun, Evan Siemann, Zhen Liu, Qiyun Wang, Dingli Wang, Wei Huang, Chujun Zhang & Jianqing Ding
1.Herbivore‐induced changes in plant volatile emissions mediate above‐belowground interactions by determining host plant colonization of different herbivores. By changing shoot‐emitted volatiles, belowground herbivores may use the plant to extend their capacity to interact with aboveground con‐ and heterospecifics. 2.We investigated the attractiveness of Triadica sebifera plants infested by larvae of a specialist beetle or root‐knot nematodes to aboveground herbivores. We then determined the contribution of leaf volatiles to the observed recruitment patterns using olfactometer experiments....

Increased precipitation and nitrogen addition accelerate the temporal increase of soil respiration during eight-year old-field grassland succession

Jiajia Zhang, Jingyi Ru, Jian Song, Heng Li, Xiaoming Li, Yafei Ma, Zheng Li, Yuanfang Hao, Zhensheng Chi, Dafeng Hui & Shiqiang Wan
Ecological succession after disturbance plays a vital role in influencing ecosystem structure and functioning. However, how global change factors regulate ecosystem carbon (C) cycling in successional plant communities remains largely elusive. As part of an eight-year (2012-2019) manipulative experiment, this study was designed to examine the responses of soil respiration and its heterotrophic component to simulated increases in precipitation and atmospheric nitrogen (N) deposition in an old-field grassland undergoing secondary succession. Over the eight-year experimental...

Data from: Direct effects of nitrogen addition on seed germination of eight semi-arid grassland species

Dong Wang, Mengzhou Liu, Xudong Huanag, Bing Zhang, Zhongling Yang, Yinzhan Liu, Yuan Miao & Shijie Han
Seed germination plays an important role in mediating plant species composition of grassland communities under nitrogen (N) enrichment. Shifts of plant community structure with N-enhanced deposition in terrestrial ecosystems have occurred globally. Despite numerous studies about the effects of enhanced N deposition on mature plant communities, few studies have focused on seed germination. Using a laboratory experiment, we report the effects of five N concentrations, including 0, 5, 10, 20, and 40 mM N (NH4NO3)...

Herbivory of a biocontrol agent on a native plant causes an indirect trait-mediated non-target effect on a native insect

Minyan He, Jialiang Zhang, Evan Siemann, Jiahui Yi, Wenchao Qin, Xiao Sun, Jianqing Ding & Wei Huang
Identifying food web linkages between biocontrol agents of invasive plants and native species is crucial for predicting indirect non-target effects. Biocontrol insects can integrate into food webs within recipient habitats and influence native insects through apparent competition (altering shared natural enemies) or density-mediated exploitation competition (changing density of native plants). However, whether and how trait-mediated exploitation competition (modifying native plant chemical defenses and volatiles profiles) can produce indirect non-target effects remains largely overlooked, despite plant...

Data from: Systematics of Mukdenia and Oresitrophe (Saxifragaceae): Insights from genome skimming data

Mengzhen Chen, Pan Deng & Luxian Liu
Oresitrophe and Mukdenia (Saxifragaceae) are epilithic sister genera used in traditional Chinese medicine. However, the taxonomy of Mukdenia, especially of M. acanthifolia, has been controversial. Genome skimming of M. acanthifolia and M. rossii, including three individuals for each species is reported and complete plastomes, partial mitogenomes and ETS/ITS sequences were assembled using these data. Their plastomes ranged from 156,341 bp to 157,018 bp in length and had similar structural characteristics and gene content of other...

Flexible habitat choice by aphids exposed to multiple cues reflecting present and future benefits

Yin Wandong, Xue Qi, Tian Baoliang, Yang Shujian, Li Zhengying, Chen Zhaozhao, Ryan Michael & Hoffmann Ary
Mothers choose suitable habitats for laying offspring to maximize fitness. Since habitat quality varies in space and time, mothers gather information to choose among available habitats through multiple cues reflecting different aspects of habitat quality at present and in the future. However, it is unclear how females assess and integrate different cues associated with current rewards and future safety to optimize oviposition/larviposition decisions, especially across small spatial scales. Here we tested the individual and interactive...

Species specific plant-mediated effects between herbivores converge at high damage intensity

Jinlong Wan, Jiahui Yi, Zhibin Tao, Zhikun Ren, Evans Otieno, Baoliang Tian, Jianqing Ding, Evan Siemann, Matthias Erb & Wei Huang
Plants are often exposed to multiple herbivores and densities of these attackers (or corresponding damage intensities) generally fluctuate greatly in the field. Plant-mediated interactions vary among herbivore species and with changing feeding intensity, but little is known about how herbivore identity and density interact to determine plant responses and herbivore fitness. Here, we investigated this question using Triadica sebifera (tallow) and its two major specialist insect herbivores, Bikasha collaris (flea beetle) and Heterapoderopsis bicallosicollis (weevil)....

Data from: Plant functional groups regulate soil respiration responses to nitrogen addition and mowing over a decade

Yue Du, Hongyan Han, Yanfen Wang, Mingxing Zhong, Dafeng Hui, Shuli Niu & Shiqiang Wan
1. Nitrogen (N) deposition and land-use practice (e.g. mowing) could have profound effects on soil respiration. However, the changes in other ecosystem components, such as plant functional groups (PFGs), may control soil carbon (C) efflux response to long term global change. 2. A 10-year (2005-2014) field experiment was conducted with both N addition (10g N m-2 yr-1) and mowing (once a year) in a northern Chinese temperate grassland. We collected continuous data on soil respiration...

Data from: A genome for gnetophytes and early evolution of seed plants

Tao Wan, Zhi-Ming Liu, Ling-Fei Li, Andrew R. Leitch, Ilia J. Leitch, Rolf Lohaus, Zhong-Jian Liu, Hai-Ping Xin, Yan-Bing Gong, Yang Liu, Wen-Cai Wang, Ling-Yun Chen, Yong Yang, Laura J. Kelly, Ji Yang, Jin-Ling Huang, Zhen Li, Ping Liu, Li Zhang, Hong-Mei Liu, Hui Wang, Shu-Han Deng, Meng Liu, Ji Li, Lu Ma … & Xiao-Ming Wang
Gnetophytes are an enigmatic gymnosperm lineage comprising three genera, Gnetum, Welwitschia and Ephedra, which are morphologically distinct from all other seed plants. Their distinctiveness has triggered much debate as to their origin, evolution and phylogenetic placement among seed plants. To increase our understanding of the evolution of gnetophytes, and their relation to other seed plants, we report here a high-quality draft genome sequence for Gnetum montanum, the first for any gnetophyte. By using a novel...

Data from: Exacerbated nitrogen limitation ends transient stimulation of grassland productivity by increased precipitation

Haiyan Ren, Zhuwen Xu, Forest Isbell, Jianhui Huang, Xingguo Han, Shiqiang Wan, Shiping Chen, Ruzhen Wang, De-Hui Zeng, Yong Jiang & Yunting Fang
Given that plant growth is often water-limited in grasslands, it has been proposed that projected increases in precipitation could increase plant productivity and carbon sequestration. However, the existing evidence for this hypothesis comes primarily from observational studies along natural precipitation gradients or from short-term manipulative experiments. It remains unclear whether long-term increased precipitation persistently stimulates grassland productivity. In the world's largest remaining temperate grassland, we found that experimentally increased precipitation enhanced net primary production, soil...

Data from: Biogeographic variation of distance-dependent effects in an invasive tree species

Qiang Yang, Jianqing Ding & Evan Siemann
1.Plant pathogens and herbivores can maintain forest diversity by reducing survival of tree seedlings close to conspecifics. However, how biogeographic variation in these natural enemies affects such distance‐dependent processes is unknown. Because invasive plants escape ecologically important enemies when introduced to a new range, distance‐dependent mortality may differ between their native and introduced ranges. 2. Here, we test whether the invasive tree Triadica sebifera escaped distance‐dependent mortality when introduced to the US from China, and...

Data from: Nighttime warming enhances ecosystem carbon-use efficiency in a temperate steppe

Jing Wang, Qian Zhang, Jian Song, Jingyi Ru, Zhenxing Zhou, Jianyang Xia, Jeffrey Dukes & Shiqiang Wan
1. Reductions in the diurnal temperature range (DTR), e.g., greater increases in daily minimum than maximum temperatures, have occurred for several decades and are projected to continue over this century, which could affect terrestrial carbon (C) cycling. Carbon-use efficiency of plants (CUEp) and ecosystems (CUEe) represents the capacity of plants to capture C and ecosystems to store C fixed from the atmosphere, respectively. Few studies have examined how grassland CUE responds to asymmetric warming. 2....

Drivers of nematode diversity in forest soils across climatic zones

Yuanhu Shao
Nematodes are the most abundant multi-cellular animals in soil, influencing key processes and functions in terrestrial ecosystems. Yet, little is known about the drivers of nematode abundance and diversity in forest soils across climatic zones. This is despite forests cover approximately 30% of the earth’s land surface, provide many crucial ecosystem services but strongly vary in hydrothermal conditions and associated ecosystem properties across climatic zones. Here, we collected nematode samples from 13 forests across a...

Long-term litter removal rather than litter addition enhances ecosystem carbon sequestration in a temperate steppe

Jing Wang, Ang Zhang, Yujin Zheng, Jian Song, Jingyi Ru, Mengmei Zheng, Dafeng Hui & Shiqiang Wan
1. Global change can greatly affect plant productivity and subsequently litter input to soil, with potential impacts on soil carbon (C) fluxes. However, the effects of litter layer in mediating C cycling and budget at an ecosystem scale is still not clear. 2. As part of a long-term litter fall manipulation experiment in a temperate steppe on the Mongolian Plateau, this study was conducted to explore effects of litter removal and addition on ecosystem C...

Multidecadal, continent-level analysis indicates agricultural practices impact wheat aphid loads more than climate change

Sun Xiao, Yumei Sun, Ling Ma, Zhen Liu, Qiyun Wang, Dingli Wang, Chujun Zhang, Hongwei Yu, Ming Xu, Jianqing Ding & Evan Siemann
Temperature has a large influence on insect abundances, thus under climate change, identifying major drivers affecting pest insect populations is critical to world food security and agricultural ecosystem health. Here, we conducted a meta-analysis with data obtained from 120 studies across China and Europe from 1970 to 2017 to reveal how climate and agricultural practices affect populations of wheat aphids. Here we showed that aphid loads on wheat had distinct patterns between these two regions,...

Design and performance of an ecosystem-scale forest soil warming experiment with infrared heater arrays

Yihang Duan, Dongwei Liu, Kai Huang, Wenkai Shou, Feifei Zhu, Yuqi Liu, Haoming Yu, Per Gundersen, Ronghua Kang, Ang Wang, Shijie Han, Zhiming Wang, Jiaojun Zhu, Weixing Zhu & Yunting Fang
How forest ecosystems respond to climate warming will determine forest trajectories over the next 100 years. However, the potential effects of elevated temperature on forests remain unclear, primarily because of the absence of long-term and large-size field warming experiments in forests, especially in Asia. Here, we present the design and performance of an ecosystem-scale warming experiment using an infrared (IR) heater array in a 60-year-old temperate mixed forest at Qingyuan Forest CERN in northeastern China....

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