74 Works

Data from: Contrasting effects of elevation on above and belowground plant pathogens

Ziyuan Lin, Peng Zhang, Fletcher Halliday, Xingxing Wang, Fei Chen, Anya Shi, Juanjuan Shi, Yao Xiao & Xiang Liu
Plant fungal diseases have a great influence on both photosynthesis and ecosystem function. However, how the elevation gradient, which is one of the most biogeographic factors, affects diseases is scarce. Here, we combined a field survey and a meta-analysis to test how elevation affect foliar fungal diseases and soil fungal pathogens through different paths. We arranged 30 plots along 3200 m ~ 4000 m in a Qinghai-Tibetan alpine meadow and collected the data of foliar...

Leaf size of woody dicots predicts ecosystem primary productivity

Yaoqi Li, Peter Reich, Bernhard Schmid, Nawal Shrestha, Xiao Feng, Tong Lyv, Brian Maitner, Xiaoting Xu, Yichao Li, Dongting Zou, Zheng-Hong Tan, Xiangyan Su, Zhiyao Tang, Qinghua Guo, Xiaojuan Feng, Brian Enquist & Zhiheng Wang
A key challenge in ecology is to understand the relationships between organismal traits and ecosystem processes. Here, with a novel dataset of leaf length and width for 10,480 woody dicots in China and 2,374 in North America, we show that the variation in community mean leaf size is highly correlated with the variation in climate and ecosystem primary productivity, independent of plant life form. These relationships likely reflect how natural selection modifies leaf size across...

Data from: Detection of somatic epigenetic variation in Norway spruce via targeted bisulfite sequencing

Katrin Heer, Kristian K. Ullrich, Manuel Hiss, Sascha Liepelt, Ralf Schulze Brüning, Jiabin Zou, Lars Opgenoorth, Stefan A. Rensing & Jiabin Zhou
Epigenetic mechanisms represent a possible mechanism for achieving a rapid response of long‐lived trees to changing environmental conditions. However, our knowledge on plant epigenetics is largely limited to a few model species. With increasing availability of genomic resources for many tree species, it is now possible to adopt approaches from model species that permit to obtain single‐base pair resolution data on methylation at a reasonable cost. Here, we used targeted bisulfite sequencing (TBS) to study...

Data from: Beneficiary feedback effects on alpine cushion benefactors become more negative with increasing cover of graminoids and in dry conditions

Richard Michalet, Christian Schöb, Sa Xiao, Liang Zhao, Tuo Chen, Li-Zhe An & Ragan M. Callaway
In facilitative interactions, the beneficiary feedback effect (BFE) has been defined as the effect of beneficiary species (facilitated species) on their benefactor. BFEs have been shown to be dependent on environmental conditions and the composition of the beneficiary community. In alpine cushion systems, BFEs are more negative with more abundant, diverse and phylogenetically aggregated communities of beneficiary species. We tested the hypothesis that the functional composition of the beneficiary communities correlates with the direction and...

Individual variation in parental tradeoffs between the number and size of offspring at the pre- and post-natal stages

Bo Du, Jian-Chuan Li, Li-Fang Gao, Li-Qing Fan, Shi-Yang Wong, Cong Wei, Hai-Yang Zhang & Wen Zhang
Life-history theory predicts that parents refer to the resources they hold to determine their breeding strategy. In multi-brooded species, it is hypothesized that single-brooded parents produce larger clutches and raise offspring with a brood survival strategy, whilst multi-brooded parents only do this under good breeding conditions. Under poor conditions, they produce smaller clutches and raise offspring with a brood reduction strategy. We tested this hypothesis in the Brown-cheeked Laughing Thrush Trochalopteron henrici, which can breed...

Data from: Plant-type dominates fine-root C:N:P stoichiometry across China: a meta-analysis

Zhiqiang Wang, Shiqi Lv, Hui Song, Mingcheng Wang, Qi Zhao, Heng Huang & Karl Niklas
Aim: Fine roots play an important role in biogeochemical cycling in terrestrial ecosystems. However, our understanding of large scale biogeographic patterns and drivers of fine-root C:N:P stoichiometry is extremely limited. Location: China. Methods: We compiled data for fine-root carbon (C), nitrogen (N) and phosphorus (P) concentrations at 165 sites across China to explore large-scale biogeographic patterns and drivers of fine-root C:N:P stoichiometry. Results: The geometric means of fine-root C, N, and P concentrations were 448.81...

Data from: Harsh environmental regimes increase the functional significance of intraspecific variation in plant communities

Kechang Niu, Shiting Zhang & Martin Lechowicz
The relative importance of intraspecific trait variation (rITV) for functional diversity (FD) in plant communities is increasingly apparent, but the influence of abiotic factors on the balance between intraspecific and interspecific effects in contrasting environments is uncertain. We predicted that rITV would increase with environmental harshness as a result of decreasing interspecific variation (Inter_FD) and concomitant increases in between-population ITV(Intra_FD). We empirically tested this prediction in a comparison of rITV for five traits (mature plant...

Fast and furious: Early differences in growth rate drive short-term plant dominance and exclusion under eutrophication

Yann Hautier, Zhang Pengfei, Mariet Hefting, Merel Soons, George Kowalchuk, Mark Rees, Andrew Hector, Lindsay Turnbull, Xiaolong Zhou, Zhi Guo, Chengjin Chu, Guozhen Du & Yann Hautier
1. The reduction of plant diversity following eutrophication threatens many ecosystems worldwide. Yet, the mechanisms by which species are lost following nutrient enrichment are still not completely understood, nor are the details of when such mechanisms act during the growing season, which hampers understanding and the development of mitigation strategies. 2. Using a common garden competition experiment, we found that early-season differences in growth rates among five perennial grass species measured in monoculture predicted short-term...

Data from: A migratory divide spanning two continents is associated with genomic and ecological divergence

Sheela Turbek, Drew Schield, Elizabeth Scordato, Andrea Contina, Xin-Wei Da, Yang Liu, Yu Liu, Emilio Pagani-Núñez, Qing-Miao Ren, Chris Smith, Craig Stricker, Michael Wunder, David Zonana & Rebecca Safran
Migratory divides are contact zones between breeding populations with divergent migratory strategies during the non-breeding season. These locations provide an opportunity to evaluate the role of seasonal migration in the maintenance of reproductive isolation, particularly the relationship between population structure and features associated with distinct migratory strategies. We combine light-level geolocators, genomic sequencing, and stable isotopes to investigate the timing of migration and migratory routes of individuals breeding on either side of a migratory divide...

Functional traits explain the consistent resistance of biodiversity to plant invasion under nitrogen enrichment

Shao-Peng Li, Jia Pu, Shu-Ya Fan, Yingtong Wu, Xiang Liu, Yani Meng, Yue Li, Wen-Sheng Shu, Jin-Tian Li & Lin Jiang
Elton’s biotic resistance hypothesis, which posits that diverse communities should be more resistant to biological invasions, has received considerable experimental support. However, it remains unclear whether such a negative diversity–invasibility relationship would persist under anthropogenic environmental change. By using the common ragweed (Ambrosia artemisiifolia) as a model invader, our four-year grassland experiment demonstrated consistently negative relationships between resident species diversity and community invasibility, irrespective of nitrogen addition, a result further supported by a meta-analysis. Importantly,...

Adverse effects of remdesivir, hydroxychloroquine, and lopinavir/ritonavir when used for COVID-19: systematic review and meta-analysis of randomized trials

Anila Qasim, Ariel Izcovich, Reed Siemieniuk, Jessica Bartoszko, Long Ge, Dena Zeraatkar, Elena Kum, Assem Khamis, Bram Rochwerg, Thomas Agoritsas, Derek Chu, Shelley McLeod, Reem Mustafa, Per Vandvik & Romina Brignardello-Petersen
Background: To summarize specific adverse effects of remdesivir, hydroxychloroquine, and lopinavir/ritonavir in patients with COVID-19. Methods: We searched 32 databases through 27 October 2020. We included randomized trials comparing any of the drugs of interest to placebo or standard care, or against each other. We conducted fixed-effects pairwise meta-analysis and assessed the certainty of evidence using the GRADE approach. Results: We included 16 randomized trials which enrolled 8226 patients. For most interventions and outcomes the...

Data from: Sex differences in costly signalling in rural Western China

Dongzhi Cairang, Erhao Ge & Ruth Mace
Numerous empirical studies suggest that individuals convey their commitment to communities and impart the qualities of being a reliable partner through costly behaviours. We collected religious practices data ranging from daily trivial practices to infrequent grand distant pilgrimages in an agricultural Tibetan village. We predict that 1) villagers who invest more in religious practices are more likely to be nominated as having various prosocial qualities. 2) Investment in grand distant pilgrimages has more efficacy than...

Variation in plant carbon, nitrogen and phosphorus contents across the drylands of China

Junlan Xiong, Longwei Dong, Jingli Lu, Weigang Hu, Haiyang Gong, Shubin Xie, Dongmin Zhao, Yahui Zhang, Xiaoting Wang, Yan Deng, Jinzhi Ran, Karl Niklas, Allan Degen & Jianming Deng
Determining large-scale patterns of plant elemental concentrations and stoichiometry along environmental gradients is critical for understanding plant adaptive strategies and predicting ecosystem biogeochemistry processes. However, it remains unclear as to how plant carbon (C), nitrogen (N), and phosphorus (P) concentrations and their stoichiometry in different organs (leaves, stems, and roots) respond to large-scale environmental gradients in drylands. We determined C, N, and P concentrations and their ratios in leaves, stems, and roots of plants growing...

Fungal disease temporal stability in an alpine meadow

Xiang Liu
Current unprecedented species extinction has galvanized studies to clarify how biodiversity affects diseases. However, almost all empirical studies focused on diseases at a certain time point, largely ignoring the temporal stability. Using a removal experiment that manipulates plant diversity, and a fertilization experiment in a Tibetan alpine meadow, we investigated how different plant biodiversity indices and nitrogen fertilization affect the temporal stability of community pathogen load over seven consecutive years. We found that the temporal...

Effects of three-dimensional soil heterogeneity and species composition on plant biomass and biomass allocation of grass-mixtures

Yongjie Liu, Guoe Li, Mingxia Wang, Wenjing Yan & Fujiang Hou
Soil heterogeneity significantly affects plant dynamics such as plant growth and biomass. Most studies developed soil heterogeneity in two dimensions, i.e. either horizontally or vertically. However, soil heterogeneity in natural ecosystems varies both horizontally and vertically i.e. in three dimensions. Previous studies on plant biomass and biomass allocation rarely considered the joint effects of soil heterogeneity and species composition. Thus, to investigate such joint effects on plant biomass and biomass allocation, a controlled experiment was...

Religious celibacy brings inclusive fitness benefits

Alberto J. C. Micheletti, Erhao Ge, Liqiong Zhou, Yuan Chen, Hanzhi Zhang, Juan Du & Ruth Mace
The influence of inclusive fitness interests on the evolution of human institutions remains unclear. Religious celibacy constitutes an especially puzzling institution, often deemed maladaptive. Here, we present sociodemographic data from an agropastoralist Buddhist population in western China, where parents sometimes sent a son to the monastery. We find that men with a monk brother father more children, and grandparents with a monk son have more grandchildren, suggesting that the practice is adaptive. We develop a...

Data from: Pliocene intraspecific divergence and Plio-Pleistocene range expansions within Picea likiangensis (Lijiang spruce), a dominant forest tree of the Qinghai-Tibet Plateau

Long Li, Richard J. Abbott, Bingbing Liu, Yongshuai Sun, Lili Li, Jiabin Zou, Xi Wang, Georg Miehe, Juanquan Liu & Jianquan Liu
A knowledge of intraspecific divergence and range dynamics of dominant forest trees in response to past geological and climate change is of major importance to an understanding of their recent evolution and demography. Such knowledge is informative of how forests were affected by environmental factors in the past and may provide pointers to their response to future environmental change. However, genetic signatures of such historical events are often weak at individual loci due to large...

Data from: Transcriptome sequencing and phylogenomic resolution within Spalacidae (Rodentia)

Gong-Hua Lin, Kun Wang, Xiao-Gong Deng, Eviatar Nevo, Fang Zhao, Jian-Ping Su, Song-Chang Guo, Tong-Zuo Zhang & Huabin Zhao
Background: Subterranean mammals have been of great interest for evolutionary biologists because of their highly specialized traits for the life underground, however, the scarcity of genomic information limits our better understanding of their evolutionary history. Owing to the convergence of morphological traits and the incongruence of molecular data, the phylogenetic relationships among three subfamilies Myospalacinae (zokors), Spalacinae (blind mole rats) and Rhizomyinae (bamboo rats) within the family Spalacidae remain unresolved. Here, we performed de novo...

Worldwide evidence of a unimodal relationship between productivity and plant species richness

Lauchlan H. Fraser, Jason Pither, Anke Jentsch, Marcelo Sternberg, Martin Zobel, Diana Askarizadeh, Sandor Bartha, Carl Beierkuhnlein, Jonathan A. Bennett, Alex Bittel, Bazartseren Boldgiv, Ilsi I. Boldrini, Edward Bork, Leslie Brown, Marcelo Cabido, James Cahill, Cameron N. Carlyle, Giandiego Campetella, Stefano Chelli, Ofer Cohen, Anna-Maria Csergo, Sandra Diaz, Lucas Enrico, David Ensing, Alessandra Fidelis … & Szilárd Szentes
The search for predictions of species diversity across environmental gradients has challenged ecologists for decades. The humped-back model (HBM) suggests that plant diversity peaks at intermediate productivity; at low productivity few species can tolerate the environmental stresses, and at high productivity a few highly competitive species dominate. Over time the HBM has become increasingly controversial, and recent studies claim to have refuted it. Here, by using data from coordinated surveys conducted throughout grasslands worldwide and...

Data from: Genetic divergence, range expansion and possible homoploid hybrid speciation among pine species in northeast China

Guangpeng Ren, Richard J. Abbott, Yongfeng Zhou, Lirui Zhang, Yanling Peng, G-P Ren, Y-F Zhou, L-R Zhang, Y-L Peng & J-Q Liu
Although homoploid hybrid speciation in plants is probably more common than previously realized, there are few well-documented cases of homoploid hybrid origin in conifers. We examined genetic divergence between two currently widespread pines in northeast China, Pinus sylvestris var. mongolica and P. densiflora, and also whether two narrowly distributed pines in the same region, P. funebris and P. takahasii, might have originated from the two widespread species by homoploid hybrid speciation. Our results, based on...

Data from: Genome-wide variation within and between wild and domestic yak

Kun Wang, Quanjun Hu, Hui Ma, Lizhong Wang, Yongzhi Yang, Wenchun Luo & Qiang Qiu
The yak is one of the few animals that can thrive in the harsh environment of the Qinghai-Tibetan Plateau and adjacent alpine regions. Yak provide essential resources allowing Tibetans to live at high altitudes. However, genetic variation within and between wild and domestic yak remain unknown. Here, we present a genome-wide study of the genetic variation within and between wild and domestic yak. Using next-generation sequencing technology, we re-sequenced three wild and three domestic yak...

Data from: High level of extrapair fertilizations in individual Tibetan azure-winged magpies and their adaptive responses

Li-Fang Gao, Li-Li Xian, Juan-Juan Luo & Bo Du
Extrapair fertilizations (EPFs) occur widely in socially monogamous birds and result in mixed parentage in the brood. The response of an individual to these EPFs of its social mate remains poorly investigated in terms of parental care for the mixed brood. We addressed this question in a cooperatively-breeding corvid, the azure-winged magpie Cyanopica cyana. Parentage analysis indicated that 45% of females and 37% of males engaged in EPFs. There were 49% of cooperative groups and...

Data from: History and evolution of alpine plants endemic to the Qinghai-Tibetan Plateau: Aconitum gymnandrum (Ranunculaceae)

Liuyang Wang, Richard Abbott, Wei Zheng, Ping Chen, Yujin Wang & Jianquan Liu
How Quaternary climatic oscillations affected range distributions and intraspecific divergence of alpine plants on the Qinghai-Tibetan Plateau (QTP) remains largely unknown. Here we report a survey of chloroplast (cp) and nuclear ribosomal (ITS) DNA variation aimed at exploring the phylogeographic history of the QTP alpine endemic Aconitum gymnandrum. We sequenced three cpDNA fragments (rpl20-rps12 intergenic spacer, the trnV intron and psbA-trnH spacer) and also the nuclear (ITS) region in 245 individuals from 23 populations sampled...

Data from: Genetic divergence, range expansion and possible homoploid hybrid speciation among pine species in northeast China

Guangpeng Ren, Richard J. Abbott, Yongfeng Zhou, Lirui Zhang, Yanling Peng, R J Abbott, G-P Ren, Y-F Zhou, L-R Zhang, Y-L Peng & J-Q Liu
Although homoploid hybrid speciation in plants is probably more common than previously realized, there are few well-documented cases of homoploid hybrid origin in conifers. We examined genetic divergence between two currently widespread pines in northeast China, Pinus sylvestris var. mongolica and P. densiflora, and also whether two narrowly distributed pines in the same region, P. funebris and P. takahasii, might have originated from the two widespread species by homoploid hybrid speciation. Our results, based on...

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