86 Works

Tropical niche conservatism explains the Eocene migration from India to Southeast Asia in Ochyroceratid spiders

Fengyuan Li, Lili Shao & Shuqiang Li
Biological migrations between India and Southeast (SE) Asia provide an ideal system for exploring the effects of geology and climate on species ranges. Geologists have confirmed that the direct collision between India and Eurasia occurred in the Early Eocene, but most migrations occurred between the Indian subcontinent and SE Asia rather than the former and the southern margin of Eurasia. To explain this seemingly paradoxical disconnect between the routes of plate movement and biological migration,...

Combined genotype and phenotype analyses reveal patterns of genomic adaptation to local environments in the subtropical oak Quercus acutissima

Jie Gao, Zhi Long Liu, Wei Zhao, Kyle W. Tomlinson, Shang-Wen Xia, Qing-Yin Zeng, Xiao-Ru Wang & Jin Chen
Understanding the effects of the demographic dynamics and environmental heterogeneity on the genomic variation of forest species is important not only for uncovering the evolutionary history of the species but also for predicting their ability to adapt to climate change. In this study, we combined a common garden experiment with range-wide population genomics analyses to infer the demographic history and characterize patterns of local adaptation in a subtropical oak species, Quercus acutissima. We scanned about...

Above- and below-ground biodiversity jointly regulate temperate forest multifunctionality along a local-scale environmental gradient

Zuoqiang Yuan, Zhanqing Hao & Xugao Wang
1. Tree diversity has been shown to promote a broad range of ecosystem functions in forests. However, how important these effects are in driving ecosystem multifunctionality in natural forests, relative to other drivers, such as below-ground biodiversity (e.g., soil microbial diversity), community-level functional traits and environmental conditions, remains poorly understood. Here, we hypothesise that tree species or phylogenetic diversity, stand structure, functional traits and soil microbial diversity jointly regulate temperate forest multifunctionality along a local-scale...

Data from: Global pattern and drivers of nitrogen saturation threshold of grassland productivity

Yunfeng Peng, Han Chen, Yuanhe Yang & Han Y.H. Chen
Ecosystem productivity usually exhibits first increase and then saturated response to increasing nitrogen (N) additions, yet the broad-scale pattern and potential drivers of the N saturation threshold are little investigated. By synthesizing N addition experiments with at least four N-input levels from the global grasslands, we applied the quadratic-plus-plateau model to fit the aboveground net primary productivity (ANPP)-N rate relationship, and estimated the saturation threshold for N rate (critical N rate, NCR) and maximum ANPP...

Drought risk of global terrestrial gross primary productivity in recent 40 years detected by a remote sensing-driven process model

Qiaoning He, Weimin Ju, Shengpei Dai, Wei He, Lian Song, Songhan Wang, Xinchuan Li & Guangxiong Mao
Gross primary productivity (GPP) is the largest flux in the global terrestrial carbon cycle and affected by multiple factors. In recent decades, drought has significantly impacted global terrestrial GPP and been projected to occur with increasing frequency and intensity. However, the drought risk of global terrestrial GPP has not been well investigated. In this study, global terrestrial GPP over the period from 1981 to 2016 was simulated with the process-based Boreal Ecosystem Productivity Simulator (BEPS)...

The asymptotic behavior of bootstrap support values in molecular phylogenetics

Jun Huang, Yuting Liu, Tianqi Zhu & Ziheng Yang
The phylogenetic bootstrap is the most commonly used method for assessing statistical confidence in estimated phylogenies by non-Bayesian methods such as maximum parsimony and maximum likelihood (ML). It is observed that bootstrap support tends to be high in large genomic datasets whether or not the inferred trees and clades are correct. Here we study the asymptotic behavior of bootstrap support for the ML tree in large datasets when the competing phylogenetic trees are equally right...

Data from: Changes in levels of enzymes and osmotic adjustment compounds in key species and their relevance to vegetation succession in abandoned croplands of a semiarid sandy region

Liu Yang, Liming Lai, Jihua Zhou, Qiaoyan Li, Sangui Yi, Qinglin Sun & Yuanrun Zheng
Reclamation of cropland from grassland is regarded as a main reason for grassland degradation; understanding succession from abandoned cropland to grassland is thus crucial for vegetation restoration in arid and semiarid areas. Soil becomes dry when cropland is reverted to grassland, and enzyme and osmotic adjustment compounds may help plants to adapt to a drying environment. Croplands that were abandoned in various years on the Ordos Plateau in China, were selected for the analysis of...

Data from: Control of adaptive action selection by secondary motor cortex during flexible visual categorization

Tian-Yi Wang, Jing Liu & Haishan Yao
Adaptive action selection during stimulus categorization is an important feature of flexible behavior. To examine neural mechanism underlying this process, we trained mice to categorize the spatial frequencies of visual stimuli according to a boundary that changed between blocks of trials in a session. Using a model with a dynamic decision criterion, we found that sensory history was important for adaptive action selection after the switch of boundary. Bilateral inactivation of the secondary motor cortex...

Data from: Belowground-mediated and phase-dependent processes drive nitrogen-evoked community changes in grasslands

Wen-Hao Zhang
Enhanced deposition of atmospheric nitrogen (N) leads to loss of plant diversity in grassland ecosystems. Numerous theories have provided potential explanations for the negative effects of N enrichment on plant diversity. However, the relative importance of each mechanism and the time scales of responses for the different functional groups remain unclear. We investigated the temporal responses of plant community in a temperate steppe to N enrichment by linking aboveground to belowground processes using a series...

Sex-linked markers by genome-wide RAD sequencing to identify XX/XY Sex Chromosomes in the spiny frog (Quasipaa boulengeri)

Xusheng Yang, Wei Luo, Yun Xia & Xiaomao Zeng
We use genotyping by sequencing as an approach to identify sex-linked markers in the spiny frog Quasipaa boulengeri with 43 wild-collected adults from a single site. The GBS methodology identified 2 loci on sex differences in allele frequencies, 50 loci on sex differences in heterozygosity, and 523 loci on male-limited occurrence, altogether associated with males heterogamety, indicating an XX-XY system. The sex specificity of five markers was further validated by PCR amplification with a large...

Data from: Brain imaging evidence for why we are numbed by numbers

Zheng Ye, Marcus Heldmann, Paul Slovic & Thomas F. Münte
We as humans do not value lives consistently. While we are willing to act for one victim, we often become numb as the number of victims increases. The empathic ability to adopt others’ perspectives is essential for motivating help. However, the perspective-taking ability in our brains seems limited. Using functional MRI, we demonstrated that the core empathy network including the medial prefrontal cortex (mPFC) was more engaged for events happening to a single person than...

Data from: Moderate grazing increased alpine meadow soils bacterial abundance and diversity index on the Tibetan Plateau

Yangong Du, Xun Ke, Licong Dai, Guangmin Cao, Huakun Zhou & Xiaowei Guo
The response of grassland soil bacterial community characteristics to different grazing intensities are central ecological topics. However, the underlying mechanisms between bacterial abundance, diversity index, and grazing intensity remain unclear. We measured alpine meadow soil bacterial gene richness and diversity index under four grazing intensities using 16S rDNA sequence analysis on the Tibetan Plateau. The results suggest that extreme grazing significantly decreased alpine meadow both bacterial gene abundance and diversity index (P<0.05). The lowest operational...

Divergent adaptations in resource-use traits explain how pikas thrive on the roof of the world

Anderson Feijo, Deyan Ge, Zhixin Wen, Lin Xia & Qisen Yang
Life in extreme environments is possible through multilevel adaptations to physical and biotic stresses. At high elevations, species face numerous challenges, besides low oxygen levels, but previous studies have focused on genetic and physiological adaptations to chronic hypoxia while overlooking other key strategies for thriving in alpine landscapes. Here, we investigate resource-use trait adaptations to extreme elevations using pikas as a model, lagomorphs distributed up to 6200 metres and reaching maximum diversity on the Qinghai-Tibet...

Supplemental materials of: Ignored biodiversity in acid soil islands in karst areas, South China: Impatiens longlinensis (Balsaminaceae), a new critically endangered species

Tian-Tian Xue, Chang-Ying Xia, Magnus Lidén, Wei-Bin Xu, Zhao-Cen Lu, Hai-Ling Chen, Shu-Wan Li & Sheng-Xiang Yu
The karst area in South China is notable for its fragile vegetation and unique flora with many narrow endemics, and is one of the most threatened biodiversity hotspots in the world. However, the biodiversity of acid soil areas scattered in the karst area have previously been underestimated. With a recent increase of new discoveries of plants and animals, the conservation of biodiversity in these acid soil areas has become urgent. This study deals with a...

Multiple-scale negative impacts of warming on ecosystem carbon use efficiency across the Tibetan Plateau grasslands

Ning Chen
Aim: Ecosystem carbon use efficiency (CUEe) is a core parameter of ecosystem process models, but its relationships with climate are still uncertain, especially for ecosystems with harsh environments. High inconsistencies in climate impacts on the CUEe have been reported among various spatial scales. The goal of this study was to examine whether warming promotes or restricts the CUEe and whether the CUEe responds to a warming gradient in a linear or nonlinear manner. Location: Tibetan...

Thermal regime and petrologic metamorphism in Alaska: Implications for subduction interface and wedge earthquakes

Ji Yingfeng
Characterized by repeated large earthquakes, slow slips, and tectonic tremors with their simultaneous release of large amounts of energy, the unstable subduction interface beneath Alaska presents a chance to understand the composite dynamic transition from deep to shallow subduction channel where these enigmatic fault slips and seismic events occur. The complex subducted slab morphology associated with the frequent occurrence of various types of faulting behaviors in Alaska is poorly understood. Our result shows that the...

Allometry rather than abiotic drivers explains biomass allocation among leaves, stems and roots of Artemisia across a large environmental gradient in China

Rong Liu, Xuejun Yang, Ruiru Gao, Xinyu Hou, Liping Huo, Zhenying Huang & Hans Cornelissen
1. Biomass allocation patterns reflect the adaptive strategies of plants growing in different environments, which is a central issue in comparative plant ecology and evolution. However, the factors underpinning specific allocation patterns across organs and the existence of general rules governing allocation remain contentious. Optimal partitioning theory (OPT) states that plants can respond to resource availability by allocating relatively more biomass to the organ that captures the most limiting resources to optimize growth. In contrast,...

Species asynchrony stabilises productivity under extreme drought across Northern China grasslands

Taofeek O. Muraina, Chong Xu, Qiang Yu, Yadong Yang, Minghui Jing, Xiaotong Jia, , Quockhanh Dam, Alan K. Knapp, Scott L. Collins, Yiqi Luo, Wentao Luo, Xiaoan Zuo, Xiaoping Xin, Xingguo Han & Melinda D. Smith
1. Biodiversity can stabilise productivity through different mechanisms, such as asynchronous species responses to environmental variability and species stability. Global changes, like intensified drought, could negatively affect species richness, species asynchrony, and species stability, but it is unclear how changes in these mechanisms will affect stability of aboveground primary productivity (ANPP) across ecosystems. 2. We studied the effects of a 4-year extreme drought on ANPP stability and the underlying mechanisms (species richness, species asynchrony, and...

Alpha-diversity, Beta-diversity and host-specificity of wood-boring longhorn beetle (Cerambycidea) in Asian tropical and subtropical forests

Fang Luo & Jin-Hua Qi
A long-debated question in ecology is whether the hyper-diversity of tropical plant-feeding insects is a direct consequence of high tropical plant diversity and/or should be attributed to increases in host plant specialization. To address this debate, we used the longhorn beetle as a study system because their larval stages feed on the xylems of trees and lianas. We hypothesized that longhorn beetles show higher host-specificity in tropical forests than in other forests; alternatively, the high...

Long-term shifts in the functional composition and diversity of a tropical dry forest: a 30-yr study

Nathan Swenson, Catherine Hulshof, Masatoshi Katabuchi & Brian Enquist
Over the past three decades there has been a concerted effort to study the long-term dynamics of tropical forests throughout the world. Data regarding temporal trends in species diversity, species composition and species-specific demographic rates have now been amassed. Such data can be utilized to test predictions regarding the roles the environment and demographic stochasticity play in driving forest dynamics. These analyses could be further refined by quantifying the temporal trends in the functional compostion...

Xylomelum occidentale (Proteaceae) accesses relatively mobile soil organic phosphorus without releasing carboxylates

Hongtao Zhong, Jun Zhou, Azrul Azmi, André Arruda, Ashlea Doolette, Ronald Smernik & Hans Lambers
1. Hundreds of Proteaceae species in Australia and South Africa typically grow on phosphorus (P)-impoverished soils, exhibiting a carboxylate-releasing P-mobilising strategy. In the Southwest Australian Biodiversity Hotspot, two Xylomelum (Proteaceae) species are widely distributed, but restricted within that distribution. 2. We grew X. occidentale in hydroponics at 1 μM P. Leaves, seeds, rhizosheath and bulk soil were collected in natural habitats. 3. Xylomelum occidentale did not produce functional cluster roots and occupied soils that are...

Data from: Chromosome-level reference genome assembly and gene editing of the dead-leaf butterfly Kallima inachus

Jie Yang, Wenting Wan, Meng Xie, Junlai Mao, Zhiwei Dong, Sihan Lu, Jinwu He, Feiang Xie, Guihun Liu, Xuelei Dai, Zhou Chang, Ruoping Zhao, Ru Zhang, Shuting Wang, Yiming Zhang, Wei Zhang, Wen Wang & Xueyan Li
The leaf resemblance of Kallima (Nymphalidae) butterflies is an important ecological adaptive mechanism that increases survival. However, the genetic mechanism underlying ecological adaptation remains unclear owing to a dearth of genomic information. Herein, we revealed the karyotype (n = 31) of the dead-leaf butterfly Kallima inachus, assembled its high-quality chromosome-level reference genome (568.92 Mb; contig N50: 19.20 Mb), and identified its Z and candidate W chromosomes. To our knowledge, this is the first study to...

Biological calcification rate and species-specific contributions of coccolithophores to total calcite inventory in the eastern Indian Ocean

Jun Sun, Haijiao Liu, Misun Yun, Guicheng Zhang, Xiaodong Zhang, Satheeswaran Thangaraj & Ke Huang
Coccolithophores are calcifying protists that have significant role in marine biological pump through calcite production (CP). We determined the biological calcification rate and ecologically key species (e.g. Gephyrocapsa oceanica) contribution to total calcite stocks in the eastern Indian Ocean (EIO) during spring intermonsoon, this region was quite under-sampled compared to other oceanic regions. Our results indicated that the numerically dominant species are of great importance to cell calcite even with low cellular calcite. CP rate...

Data from: Climatic-niche evolution follows similar rules in plants and animals

Hui Liu, Qing Ye & John Wiens
Climatic niches are essential in determining where species can occur and how they will respond to climate change. However, it remains unclear if climatic-niche evolution is similar in plants and animals, or intrinsically different. For example, previous authors have proposed that plants have broader environmental tolerances than animals but are more sensitive to climate change. Here we test ten predictions about climatic-niche evolution in plants and animals, using phylogenetic and climatic data for 19 plant...

Data from: Examining differences in phylogenetic composition enhances understanding of the phylogenetic structure of the shrub community in the northeastern Qinghai-Tibetan Plateau

Yuanming Xiao, Guoying Zhou, Yang Lucun, Nie Xiuqing, Li Changbin, Xiong Feng & Wang Lingling
Abstract: Periodic climatic oscillations and species dispersal during the post-glacial period are two important causes of plant assemblage and distribution on the Qinghai-Tibet Plateau (QTP). To improve our understanding of the bio-geological histories of shrub communities on the QTP, we tested two hypotheses. First, the intensity of climatic oscillations played a filtering role during community structuring. Second, species dispersal during the post-glacial period contributed to the recovery of species and phylogenetic diversity and the emergence...

Registration Year

  • 2020
    86

Resource Types

  • Dataset
    86

Affiliations

  • Chinese Academy of Sciences
    86
  • Peking University
    6
  • University of California, Berkeley
    3
  • Nanjing University
    3
  • San Diego State University
    3
  • University of Chinese Academy of Sciences
    3
  • Norwegian Meteorological Institute
    2
  • Yunnan University
    2
  • VU University Amsterdam
    2
  • Zhejiang University
    2