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Metabarcoding in the middle delta of Paraná River, Argentina, reveals novel diversity of early-branching Fungi and unicellular holozoans

ABSTRACT: Metabarcoding analysis of 18S eukaryotic diversity in the Paraná River, Argentina (V8-9 region)

PROVIDER: PRJEB23493 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR2206820_1.fastq.gz	Fastqsanger.gz
	ERR2206820_2.fastq.gz	Fastqsanger.gz
	ERR2206811_1.fastq.gz	Fastqsanger.gz
	ERR2206811_2.fastq.gz	Fastqsanger.gz
	ERR2206812_1.fastq.gz	Fastqsanger.gz

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Metabarcoding in the middle delta of Paraná River, Argentina, reveals novel diversity of early-branching Fungi and unicellular holozoans

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Project description:Intraspecific population diversity (specifically, spatial asynchrony of population dynamics) is an essential component of metapopulation stability and persistence in nature. In 2D systems, theory predicts that metapopulation stability should increase with ecosystem size (or habitat network size): Larger ecosystems will harbor more diverse subpopulations with more stable aggregate dynamics. However, current theories developed in simplified landscapes may be inadequate to predict emergent properties of branching ecosystems, an overlooked but widespread habitat geometry. Here, we combine theory and analyses of a unique long-term dataset to show that a scale-invariant characteristic of fractal river networks, branching complexity (measured as branching probability), stabilizes watershed metapopulations. In riverine systems, each branch (i.e., tributary) exhibits distinctive ecological dynamics, and confluences serve as "merging" points of those branches. Hence, increased levels of branching complexity should confer a greater likelihood of integrating asynchronous dynamics over the landscape. We theoretically revealed that the stabilizing effect of branching complexity is a consequence of purely probabilistic processes in natural conditions, where within-branch synchrony exceeds among-branch synchrony. Contrary to current theories developed in 2D systems, metapopulation size (a variable closely related to ecosystem size) had vague effects on metapopulation stability. These theoretical predictions were supported by 18-y observations of fish populations across 31 watersheds: Our cross-watershed comparisons revealed consistent stabilizing effects of branching complexity on metapopulations of very different riverine fishes. A strong association between branching complexity and metapopulation stability is likely to be a pervasive feature of branching networks that strongly affects species persistence during rapid environmental changes.

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Metabolic syndrome among a middle-aged population in the Red River Delta region of Vietnam.

Project description:BackgroundMetabolic syndrome (MetS) is a clustering of metabolic risk factors for cardiovascular diseases and type 2 diabetes. The study aimed to estimate the prevalence of MetS, its components, and their associations among rural middle-aged population in Vietnam.MethodsA cross-sectional study with a representative sample (n?=?2443) was conducted to collect data on demographic, socioeconomic, anthropometric, lifestyles, plasma glucose, and lipid profile. The age- and sex-adjusted prevalences of MetS and its components were calculated using the direct standardization. Associations of risk factors with MetS were evaluated using logistic regression, taken into account the confounding factors.ResultsThe total age- and sex-adjusted prevalence (95% CI) of MetS was 16.3% (14.0?-?18.6). The most frequent component of MetS was high triglycerides (43.2%), followed by low HDL-C (42.0%), elevated blood pressure (29.2%), high plasma glucose (14.3%), and central obesity (12.3%). Of the total population, only 17.6% did not have any component of MetS and more than 40% had at least two MetS components. The association of MetS with residence, age, body mass index, marital status, and siesta time per day was statistically significant in univariate analysis and replicated in multivariate analysis.ConclusionThe MetS prevalence and its components are common and major public health burden in the middle-aged adults in Vietnam. Habitants living in urban, being never-married, having an increase in age, BMI, and siesta time per day are significantly associated with MetS, and they should be paid much more attention for screening and implementing preventive activities.

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