14 Works

Data from: Density regulation in Northeast Atlantic fish populations: density dependence is stronger in recruitment than in somatic growth

Fabian Zimmermann, Daniel Ricard & Mikko Heino
1. Population regulation is a central concept in ecology, yet in many cases its presence and the underlying mechanisms are difficult to demonstrate. The current paradigm maintains that marine fish populations are predominantly regulated by density-dependent recruitment. 2. While it is known that density-dependent somatic growth can be present too, its general importance is unknown and most practical applications neglect it. This study aimed to close this gap by for the first time quantifying and...

Data from: PMSeeker: A Scheme for paternity marker set mining

Xiao-Qin Xia, Mijuan Shi & Lei Xia
The paternity test is a genetic test that analyzes genetic characteristics (mostly molecular markers) to identify whether two individuals have a parent-child relationship. It is frequently employed in judicial identification and economic species breeding. Because a single marker's discriminability is restricted, numerous markers are typically utilized to produce an accurate result. Obviously, having an excessive number of redundant markers wastes time and resources, and adequate approaches are required to screen reduced and efficient paternity marker...

Data from: Growth and nitrogen uptake characteristics reveal outbreak mechanism of the opportunistic macroalga Gracilaria tenuistipitata

Chao Wang, Anping Lei, Kai Zhou, Zhengyu Hu, Wenlong Hao & Junda Yang
Macroalgae has bloomed in the brackish lake of Shenzhen Bay, China continuously from 2010 to 2014. Gracilaria tenuistipitata was identified as the causative macroalgal species. The aim of this study was to explore the outbreak mechanism of G. tenuistipitata, by studying the effects of salinity and nitrogen sources on growth, and the different nitrogen sources uptake characteristic. Our experimental design was based on environmental conditions observed in the bloom areas, and these main factors were...

Data from: A phylogeographic, demographic and historical analysis of the short-tailed pit viper (Gloydius brevicaudus): evidence for early divergence and late expansion during the Pleistocene

Li Ding, Xiao-Ni Gan, Shun-Ping He & Er-Mi Zhao
The impact of quaternary glaciation in eastern China on local fanua and flora has been a topic of considerable interest. We used mitochondrial DNA (mtDNA) sequence data and coalescent simulations to test two general biogeographic hypothesis related to the effects of Pleistocene climatic fluctuations for a widespread ophidian species (Gloydius brevicaudus) in eastern China and Korean Peninsula. The phylogenetic analysis revealed three major lineages, the southeast Coastal, Yangtze and North Lineages. The latter two are...

Data from: Increasing zooplankton size diversity enhances the strength of top-down control on phytoplankton through diet niche partitioning

Lin Ye, Chun-Yi Chang, Carmen García-Comas, Gwo-Ching Gong & Chih-Hao Hsieh
1. The biodiversity-ecosystem functioning debate is a central topic in ecology. Recently, there has been a growing interest in size diversity because body size is sensitive to environmental changes and is one of the fundamental characteristics of organisms linking many ecosystem properties. However, how size diversity affects ecosystem functioning is an important yet unclear issue. 2. To fill the gap, with large-scale field data from the East China Sea, we tested the novel hypothesis that...

Data from: Genetic diversity and differentiation in a wide ranging anadromous fish, American shad (Alosa sapidissima), is correlated with latitude

Daniel J. Hasselman, Daniel Ricard & Paul Bentzen
Studies that span entire species ranges can provide insight into the relative roles of historical contingency and contemporary factors that influence population structure and can reveal patterns of genetic variation that might otherwise go undetected. American shad is a wide ranging anadromous clupeid fish that exhibits variation in demographic histories and reproductive strategies (both semelparity and iteroparity) and provides a unique perspective on the evolutionary processes that govern the genetic architecture of anadromous fishes. Using...

Data from: Different roles of elevational and local environmental factors on abundance-based beta diversity of the soil Enchytraeidae on the Changbai Mountain

Xiaoming Jiang, Jing Chen & Zhicai Xie
The elevational alpha biodiversity gradient in mountain regions is one of the well-known ecological patterns, but its beta diversity pattern remains poorly-known. Examining the beta diversity and its components could enhance the understanding of community assembly mechanism. We studied the beta diversity pattern of the soil enchytraeids along a distinct elevational gradient (705—2280 m) on the Changbai Mountain, the best-preserved mountain in northeastern China. The overall abundance-based community dissimilarity was relatively high (ca. 0.70), largely...

Data from: Functional diversity promotes phytoplankton resource use efficiency

Lin Ye, Chun-Wei Chang, Shin-Ichiro S. Matsuzaki, Noriko Takamura, Claire E. Widdicombe & Chih-Hao Hsieh
1.Understanding the relationship between biodiversity and ecosystem functioning (BEF) is a central topic in ecology. Multi‐traits based functional diversity has been proposed to improve mechanistic understanding of the BEF relationship; however, how trait‐based functional diversity affects ecosystem functioning and processes has rarely been addressed in aquatic ecosystems. 2.Here, we examined the causal relationships between three phytoplankton functional diversity indices (FAD2, FDc, FRic) and Shannon diversity index versus resource use efficiency for nitrogen (RUEN), phosphorus (RUEP),...

Data from: Multiple facets of stream macroinvertebrate alpha diversity are driven by different ecological factors across an extensive altitudinal gradient

Zhengfei Li, Xiaoming Jiang, Jun Wang, Xingliang Meng, Jani Heino & Zhicai Xie
Environmental filtering and spatial structuring are important ecological processes for the generation and maintenance of biodiversity. However, the relative importance of these ecological drivers for multiple facets of diversity is still poorly understood in highland streams. Here, we examined the responses of three facets of stream macroinvertebrate alpha diversity to local environmental, landscape-climate and spatial factors in a near-pristine highland riverine ecosystem. Taxonomic (species richness, Shannon diversity and evenness), functional (functional richness, evenness, divergence and...

Data from: Seasonal and spatial dynamics of gas ebullition in a temperate water-storage reservoir

Michal Tušer, Tomáš Picek, Zuzana Sajdlová, Tomáš Jůza, Milan Muška & Jaroslava Frouzova
Gas ebullition of river impoundments plays an increasingly significant role, particularly in transporting methane CH4 from their sediments to the atmosphere, and contributing to the global carbon budget and global warming. Quantifying stochastic and episodic nature of gas ebullition is complicated especially when conventionally conducted by using coverage-limited gas traps. Current knowledge of seasonality in a reservoir’s gas ebullition is lacking in the literature. For this reason, advanced acoustic surveying was intensively applied to determine...

Data from: Highly divergent 16S rRNA sequences in ribosomal operons of Scytonema hyalinum (Cyanobacteria)

Jeffrey R. Johansen, Jan Mareš, Nicole Pietrasiak, Markéta Bohunická, , Lenka Štenclová & Tomáš Hauer
A highly divergent 16S rRNA gene was found in one of the five ribosomal operons present in a species complex currently circumscribed as Scytonema hyalinum (Nostocales, Cyanobacteria) using clone libraries. If 16S rRNA sequence macroheterogeneity among ribosomal operons due to insertions, deletions or truncation is excluded, the sequence heterogeneity observed in S. hyalinum was the highest observed in any prokaryotic species thus far (7.3–9.0%). The secondary structure of the 16S rRNA molecules encoded by the...

Data from: Analysis of hypoxia-inducible factor alpha polyploidization reveals adaptation to Tibetan plateau in the evolution of schizothoracine fish

Lihong Guan, Wei Chi, Wuhan Xiao, Liangbiao Chen & Shunping He
Background: Hypoxia-inducible factor (HIF) is a master regulator that mediates major changes in gene expression under hypoxic conditions. Though HIF family has been identified in many organisms, little is known about this family in schizothoracine fish. Results: Duplicated hif-α (hif-1αA, hif-1αB, hif-2αA, and hif-2αB) genes were identified in schizothoracine fish. All the deduced HIF-α proteins contain the main domains (bHLH-PAS, ODDD, and TAD), also found in humans. Evidence suggests a Cyprinidae-specific deletion, specifically, a conserved...

Data from: Warming alters juvenile carp effects on macrophytes resulting in a shift to turbid conditions in freshwater mesocosms

Peiyu Zhang, Huan Zhang, Huan Wang, Sabine Hilt, Chao Li, Chen Yu, Min Zhang & Jun Xu
1. Multiple stressors such as climate change and eutrophication are responsible for the global decline of macrophytes in lakes. The loss of this key component can result in turbid conditions and a loss of important ecosystem functions and services, particularly in shallow lakes. Benthivorous fish, which can increase in abundance during eutrophication, can adversely affect macrophytes through physical disturbance, cascading effects on turbidity, suspended and attached algae (phytoplankton and periphyton) and direct consumption. However, whether...

Data from: A phylogeographic, demographic and historical analysis of the short-tailed pit viper (Gloydius brevicaudus): evidence for early divergence and late expansion during the Pleistocene

Li Ding, Xiao-Ni Gan, Shun-Ping He & Er-Mi Zhao
The impact of quaternary glaciation in eastern China on local fanua and flora has been a topic of considerable interest. We used mitochondrial DNA (mtDNA) sequence data and coalescent simulations to test two general biogeographic hypothesis related to the effects of Pleistocene climatic fluctuations for a widespread ophidian species (Gloydius brevicaudus) in eastern China and Korean Peninsula. The phylogenetic analysis revealed three major lineages, the southeast Coastal, Yangtze and North Lineages. The latter two are...

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