86 Works

Global biogeography of fungal and bacterial biomass carbon in topsoil

Liyuan He, Jorge Rodrigues, Nadejda Soudzilovskaia, Milagros Barceló, Pål Axel Olsson, Changchun Song, Leho Tedersoo, Fenghui Yuan, Fengming Yuan, David Lipson & Xiaofeng Xu
Bacteria and fungi, representing two major soil microorganism groups, play an important role in global nutrient biogeochemistry. Biogeographic patterns of bacterial and fungal biomass are of fundamental importance for mechanistically understanding nutrient cycling. We synthesized 1323 data points of phospholipid fatty acid-derived fungal biomass C (FBC), bacterial biomass C (BBC), and fungi:bacteria (F:B) ratio in topsoil, spanning 11 major biomes. The FBC, BBC, and F:B ratio display clear biogeographic patterns along latitude and environmental gradients...

From canopy complementarity to asymmetric competition: The negative structure-productivity relationship over the succession of a subtropical forest

Xiaoxia Yi, Ningning Wang, Haibao Ren, Tianyu Hu, Yanjun Su, Xiangcheng Mi, Qinghua Guo & Keping Ma
1. Structure and diversity-productivity relationships are central to many ecological questions. While positive structure and diversity-productivity relationships have been widely documented in controlled experiments and early secondary forests, negative structure-productivity relationships have also been found in late successional forests. Generally, the mechanisms causing observed structure and diversity-productivity relationships are not well established. 2. We examined structure and diversity-productivity relationships from by combining LiDAR and repeated census data from nine 1-ha subtropical forest plots along a...

Brain size variation along altitudinal gradients in the Asiatic Toad (Bufo gargarizans)

Zhongyi Yao
Size changes of brain and brain regions along altitudinal gradients provide insight into the trade-off between energetic expenditure and cognitive capacity. We investigated the brain size variations of the Asiatic Toad (Bufo gargarizans) across altitudes from 700m to 3200m. A total of 325 individuals from 11 sites and two transects were sampled. To reduce confounding factors, all sampling sites within each transect were within a maximum distance of 85km and minimum altitudinal difference close to...

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...

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...

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...

Data from: Differential impacts of nitrogen addition on rhizosphere and bulk-soil carbon sequestration in an alpine shrubland

Xiaomin Zhu, Ziliang Zhang, Dongyan Liu, Yongping Kou, Qian Zheng, Mei Liu, Juan Xiao, Qing Liu & Huajun Yin
1. Due to complex root-soil interactions, the responses of carbon (C) dynamics in the rhizosphere to elevated nitrogen (N) deposition may be different from those in bulk soil. However, the potentially different response of C dynamics in the rhizosphere and bulk soils and their contributions to soil C sequestration under N deposition is still not elucidated. 2. We conducted an N addition experiment in an alpine shrubland dominated by Sibiraea angustata located on the eastern...

Data from: ‘In and out of’ the Qinghai-Tibet Plateau and the Himalayas: centers of origin and diversification compared across five clades of Eurasian montane and alpine passerine birds

Martin Päckert, Adrien Favre, Jan Schnitzler, Jochen Martens, Yue-Hua Sun, Dieter Thomas Tietze, Frank Hailer, Ingo Michalak & Patrick Strutzenberger
Encompassing some of the major hotspots of biodiversity on Earth, large mountain systems have long held the attention of evolutionary biologists. The region of the Qinghai-Tibet Plateau (QTP) is considered a biogeographic source for multiple colonization events into adjacent areas including the northern Palearctic. The faunal exchange between the QTP and adjacent regions could thus represent a one-way street (‘out of’ the QTP). However, immigration into the QTP region has so far received only little...

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...

Processes at the soil-root interface determine the different responses of nutrient limitation and metal toxicity in forbs and grasses to nitrogen enrichment

Wen-Hao Zhang, Qiuying Tian, Peng Lu, Pengfei Ma, Huirong Zhou, Ming Yang, Xiufeng Zhai, Mengmeng Chen, Hong Wang, Wenchao Li, Wenming Bai & Hans Lambers
Nutrient limitation and metal toxicity have been implicated in changes of grassland communities by nitrogen (N) deposition. Belowground processes, especially those at the soil-root interface, play important roles in determining variation in nutrient concentrations in plants. However, few studies have specifically focused on the roles of these processes in mineral-element acquisition in grassland plants in response to N enrichment. Here we investigated the contributions of belowground processes at the soil-root interface to the differential acquisition...

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...

Nutrient resorption of Kandelia obovata in response to nutrient enrichment

Lili Wei
The impact of nutrient increase on nutrient resorption from senescent leaves is an important topic, which is not completely understood. Mangrove species are characterized by nutrient conservation mechanisms as a consequence of adaptation to nutrient-poor environments. The understanding of the response of the traits related to nutrient conservation strategies to nutrient availability is limited. This study aims to address whether nutrient resorption of mangrove species is responsive to long-term nutrient enrichment. Methods A field-based study...

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: 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...

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...

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...

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...

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...

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...

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...

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...

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)...

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: 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...

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...

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