Abstract River ecosystems are among the most affected habitats globally by human activities, such as release of chemical pollutants. However, it remains largely unknown how and to what extent many communities zooplankton these environmental stressors in river ecosystems. Here, we aim determine major factors responsible for shaping community structure heavily polluted Specially, use rotifers Haihe Basin (HRB) North China a case study test hypothesis that species sorting (i.e. “filtered” occur...

Abstract Grazing exerts a profound influence on both the plant diversity and productivity of grasslands, while simultaneously exerting significant impact regulating grassland soil carbon sequestration. Moreover, besides altering taxonomic communities, grazing can also affect their functional traits. However, we still poorly understand how modifies relationship between (FD) sequestration in ecosystems. Here, conducted manipulation experiment to investigate effects different regimes (no...

Microbial residual carbon (MRC) is a key component of soil organic (SOC) and crucial for SOC stabilization, contributing to the formation stable pool. However, accumulation patterns MRC in different plantation forest types remain unclear. In this study, based on principle site condition similarity supported by field investigations, soils from Populus alba, Salix matsudana Koidz, Pinus tabuliformis Beijing were selected as research objects. The physical chemical properties soils, well...

An aerobic actinomycete, designated SCSIO 01299(T), was isolated from a deep-sea sediment collected the northern South China Sea at depth of 3258 m. The isolate found to be natural producer synthesized antitumour agent deoxynyboquinone and its three new derivatives, pseudonocardians A, B C. A blast search based on almost-complete 16S rRNA gene sequences showed that strain 01299(T) had high sequence similarities with members genus Pseudonocardia. phylogenetic tree revealed member Phenotypic...

Abstract A negative species-genetic diversity correlation (SGDC) could be predicted by the niche variation hypothesis, whereby an increase in species within community reduces genetic of co-occurring because reduction average breadth; alternatively, competition reduce effective population size and therefore community. We tested these predictions a 20 ha tropical forest dynamics plot (FDP) Xishuangbanna seasonal rainforest. established 15 plots FDP investigated soil properties, tree diversity,...

The human microbiome is an extremely complex ecosystem considering the number of bacterial species, their interactions, and its variability over space time. Here, we untangle complexity for Irritable Bowel Syndrome (IBS) that most prevalent functional gastrointestinal disorder in populations. Based on a novel information theoretic network inference model, detected potential species interaction networks are functionally structurally different healthy unhealthy individuals. Healthy...

The focus of this study is to explore the statistical distribution models high-speed railway (HSR) train delays. Based on actual HSR operational data, delay causes and their classification, frequency, number affected trains, space–time distributions are discussed. Eleven types events classified, a detailed analysis for each classification presented. Models probability cause proposed. Different functions, including lognormal, exponential, gamma, uniform, logistic, normal distribution, were...

Fish ecosystems perform ecological functions that are critically important for the sustainability of marine ecosystems, such as global food security and carbon stock. During 21st century, significant warming caused by climate change has created pressing challenges fish threaten species existence ecosystem health. Here, we study a coastal community in Maizuru Bay, Japan, investigate relationships between fluctuations ST, abundance-based interactions salient biodiversity. Observations show...

Loblolly pine, a native pine species of the southeastern United States, is most-planted for commercial timber. Predicting survival loblolly following planting great interest to researchers in forestry science as it closely related yield Data were collected from region-wide thinning study, where permanent plots, located at 182 sites ranging central Texas east Florida and north Delaware, established 1980–1981. One main objectives this study was investigate relationship between trees several...

A new uridine derivative 11457 (1), and a indole 11457B (2), together with known compound 1H-indole-2-carbaldehyde (3), were characterized from the fermentation broth of actinomycete Pseudonocardia sp. SCSIO 11457, an isolate associated scleractinian coral Galaxea fascicularis. Upon detailed spectroscopic analysis, (1) was identified as analog, (2) elucidated 2-hydroxy-1-(1H-indol-2-yl)pentane-1,4-dione. Biological evaluation indicated that none compounds 1–3 showed antibacterial activities...

Understanding the maintenance of biodiversity and community assembly is a central issue in ecology. Here, we examined patterns phylogenetic structure subtropical forests along an elevational gradient Ailao Mountains southwest China. We surveyed all trees with diameter at breast height ≥1 cm 16 plots, constructed phylogeny from DNA barcode sequence data constraint tree based on Angiosperm Phylogeny Group (APG) III. found that changed phylogenetically clustered to overdispersed increasing...

Aims:The Chinese subtropical evergreen broad-leaved forest is facing great threats, caused by global climate change, and its protection needs to be solved urgently.Cinnamomum the dominant genus for forest.Cinnamomum fundamental stability of ecosystem due large number individuals, coverage, high biomass, strong living ability.Here, we predict potential spatial distribution pattern (potential area species richness hotspots area) Cinnamomum under five periods bioclimatic, overlay nature...

2006-2008年对西江珍稀鱼类自然保护区江段进行鱼类组成与生境调查,共采集鱼类81种,隶属于11目25科69属,其中洄游鱼类8种,外来种6种,土著淡水鱼类67种.以种类数及其多样性指数分析,表明西江保护区鱼类种类多样性较高.优势种是鲮鱼、赤眼鳟、广东鲂,主要经济鱼类为广东鲂、赤眼鳟、鲮鱼、黄尾鲴、花鰶,珍稀濒危物种有花鳗鲡、珠江长臀鮠、台细鳊及多种珠江水系特有鱼类.保护区鱼类生态类型多样,以定居性、杂食性和底栖鱼类为主.保护区江段水文动力条件独特,河床底质结构复杂,是西江鱼类栖息、产卵的理想场所,栖息地破坏、过度捕捞等是保护区鱼类生物多样性的主要胁迫因素.;Survey aiming at the wild fish resources in Provincial Rare Fishes Natural Reserve of Xijiang River Zhaoqing City. 81 species belonging to 11 orders, 25 families and 69 genera from 2006 2008, among them there are...

As human activities cause water eutrophication and overfishing, which had a serious impact on fish resources, diversity showed downward trend. In order to understand the changes of assemblage structure in process ecological stocking effectively, existing community Daye Lake was divided into 9 sites evaluated summer 2019 2020, resources were investigated by traditional fishing eDNA metabarcoding technology. The results that 33 species belonging 18 genera, 6 families 4 orders based methods....

Abstract Fish ecosystems perform ecological functions that are critically important for the sustainability of marine ecosystems, such as global food security and carbon stock. During 21st century, significant warming caused by climate change has created pressing challenges fish threaten species existence ecosystem health. Here, we study a coastal community in Maizuru Bay, Japan, investigate relationships between fluctuations ST, abundance-based interactions salient biodiversity. Observations...

Abstract The detection of causal interactions is great importance when inferring complex ecosystem functional and structural networks for basic applied research. Convergent cross mapping (CCM) based on nonlinear state-space reconstruction made substantial progress about network inference by measuring how well historical values one variable can reliably estimate states other variables. Here we investigate the ability a developed Optimal Information Flow (OIF) model to infer bidirectional...