Influence of Environmental Factors on Zebra Mussel Population Expansion in Lake Champlain, 1994–2010

Abstract Background:Aedes albopictus is an indigenous primary vector for Dengue and Zika viruses in China. Compared with its insecticide resistance, biology, and vector competence, little is known about its genetic variation, which corresponds to environmental variations. Thus, the present study examines how Ae. albopictus varies among different climatic regions in China and deciphers its potential dispersal patterns.Methods:The genetic variation and population structure of 17 Ae. albopictus populations collected from three climatic regions of China were investigated with 11 microsatellite loci and the mitochondrial COI gene.Results:Of 44 isolated microsatellite markers, 11 pairs were chosen for genotyping analysis and had an average PIC value of 0.713, representing high polymorphism. The number of alleles was high in each population, with the ne value increasing from the temperate region (3.876) to the tropical region (4.144). Twenty-five COI haplotypes were detected, and the highest diversity was observed in the tropical region. The mean Ho value (ca. 0.557) of all the regions was significantly lower than the mean He value (ca. 0.684), with nearly all populations significantly departing from HWE and displaying significant population expansion (p-value < 0.05). Two genetically isolated groups and three haplotype clades were evaluated via STRUCTURE and haplotype phylogenetic analyses, and the tropical populations were significantly isolated from those in the other regions. Most genetic variation in Ae. albopictus was detected within populations and individuals at 31.40% and 63.04%, respectively, via the AMOVA test, and a relatively significant positive correlation was observed among only the temperate populations via IBD analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations, and four major migration trends with high gene flow (Nm>0.4) were reconstructed between the tropical region and the other two regions. Environmental factors, especially temperature and rainfall, may be the leading causes of genetic diversity in different climatic regions.Conclusions:Continuous dispersion contributes to the similarity of Ae. albopictus populations across different climatic regions, and environmental factors, especially temperature and rainfall, may be the leading causes of genetic variation.

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Removal of algae by the zebra mussel (Dreissena polymorpha) population in western Lake Erie: a bioenergetics approach

Canadian Journal of Fisheries and Aquatic Sciences ◽

10.1139/f95-040 ◽

1995 ◽

Vol 52 (2) ◽

pp. 381-390 ◽

Cited By ~ 62

Author(s):

Charles P. Madenjian

Keyword(s):

Primary Production ◽

Water Column ◽

Zebra Mussel ◽

Dreissena Polymorpha ◽

Lake Erie ◽

Mussel Population ◽

Western Basin ◽

Bioenergetics Model ◽

Western Lake ◽

Western Lake Erie

A bioenergetics model for growth of a zebra mussel (Dreissena polymorpha) individual was verified with observations on zebra mussel growth in western Lake Erie. The bioenergetics model was then applied to the zebra mussel population in the western basin of Lake Erie to estimate the removal of phytoplankton by mussels. According to the modeling results, the zebra mussel population consumed 5.0 million tonnes of phytoplankton, while 1.4 million tonnes of phytoplankton was deposited in pseudofeces from the mussels. Thus, a total of 6.4 ± 2.4 million tonnes of phytoplankton was removed from the water column by zebra mussel in western Lake Erie during 1990. Primary production was estimated to be 24.8 million tonnes; therefore, zebra mussel removed the equivalent of 26 ± 10% of the primary production for western Lake Erie.

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Dispersal patterns and population genetic structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

Parasites & Vectors ◽

10.1186/s13071-020-04521-4 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Jian Gao ◽

Heng-Duan Zhang ◽

Xiao-Xia Guo ◽

Dan Xing ◽

Yan-De Dong ◽

...

Keyword(s):

Genetic Variation ◽

Environmental Factors ◽

Aedes Albopictus ◽

Phylogenetic Analyses ◽

Population Expansion ◽

The Other ◽

Tropical Region ◽

Dispersal Patterns ◽

Climatic Regions ◽

The Mean

Abstract Background Aedes albopictus is an indigenous primary vector for dengue and Zika viruses in China. Compared with its insecticide resistance, biology and vector competence, little is known about its genetic variation, which corresponds to environmental variations. Thus, the present study examines how Ae. albopictus varies among different climatic regions in China and deciphers its potential dispersal patterns. Methods The genetic variation and population structure of 17 Ae. albopictus populations collected from three climatic regions of China were investigated with 11 microsatellite loci and the mitochondrial coxI gene. Results Of 44 isolated microsatellite markers, 11 pairs were chosen for genotyping analysis and had an average PIC value of 0.713, representing high polymorphism. The number of alleles was high in each population, with the ne value increasing from the temperate region (3.876) to the tropical region (4.144). Twenty-five coxI haplotypes were detected, and the highest diversity was observed in the tropical region. The mean Ho value (ca. 0.557) of all the regions was significantly lower than the mean He value (ca. 0.684), with nearly all populations significantly departing from HWE and displaying significant population expansion (p value < 0.05). Two genetically isolated groups and three haplotype clades were evaluated via STRUCTURE and haplotype phylogenetic analyses, and the tropical populations were significantly isolated from those in the other regions. Most genetic variation in Ae. albopictus was detected within populations and individuals at 31.40 and 63.04%, respectively, via the AMOVA test, and a relatively significant positive correlation was observed among only the temperate populations via IBD analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations, and four major migration trends with high gene flow (Nm > 0.4) were reconstructed between the tropical region and the other two regions. Environmental factors, especially temperature and rainfall, may be the leading causes of genetic diversity in different climatic regions. Conclusions Continuous dispersion contributes to the genetic communication of Ae. albopictus populations across different climatic regions, and environmental factors, especially temperature and rainfall, may be the leading causes of genetic variation. Graphical abstract

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Dispersal patterns and population structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

10.21203/rs.3.rs-38761/v3 ◽

2020 ◽

Author(s):

Jian Gao ◽

Hengduan Zhang ◽

Xiaoxia Guo ◽

Dan Xing ◽

YanDe Dong ◽

...

Keyword(s):

Population Structure ◽

Genetic Variation ◽

Environmental Factors ◽

Aedes Albopictus ◽

Population Expansion ◽

The Other ◽

Tropical Region ◽

Dispersal Patterns ◽

Climatic Regions ◽

The Mean

Abstract Background:Aedes albopictus is an indigenous primary vector for Dengue and Zika viruses in China. Compared with its insecticide resistance, biology, and vector competence, little is known about its genetic variation, which corresponds to environmental variations. Thus, the present study examines how Ae. albopictus varies among different climatic regions in China and deciphers its potential dispersal patterns.Methods:The genetic variation and population structure of 17 Ae. albopictus populations collected from three climatic regions of China were investigated with 11 microsatellite loci and the mitochondrial coxI gene.Results:Of 44 isolated microsatellite markers, 11 pairs were chosen for genotyping analysis and had an average PIC value of 0.713, representing high polymorphism. The number of alleles was high in each population, with the ne value increasing from the temperate region (3.876) to the tropical region (4.144). Twenty-five coxI haplotypes were detected, and the highest diversity was observed in the tropical region. The mean Ho value (ca. 0.557) of all the regions was significantly lower than the mean He value (ca. 0.684), with nearly all populations significantly departing from HWE and displaying significant population expansion (p-value < 0.05). Two genetically isolated groups and three haplotype clades were evaluated via STRUCTURE and haplotype phylogenetic analyses, and the tropical populations were significantly isolated from those in the other regions. Most genetic variation in Ae. albopictus was detected within populations and individuals at 31.40% and 63.04%, respectively, via the AMOVA test, and a relatively significant positive correlation was observed among only the temperate populations via IBD analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations, and four major migration trends with high gene flow (Nm>0.4) were reconstructed between the tropical region and the other two regions. Environmental factors, especially temperature and rainfall, may be the leading causes of genetic diversity in different climatic regions.Conclusions:Continuous dispersion contributes to the genetic communication of Ae. albopictus populations across different climatic regions, and environmental factors, especially temperature and rainfall, may be the leading causes of genetic variation.

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Insights Into the Environmental Impact on Genetic Structure and Larval Dispersal of Crown-of-Thorns Starfish in the South China Sea

Frontiers in Marine Science ◽

10.3389/fmars.2021.728349 ◽

2021 ◽

Vol 8 ◽

Author(s):

Biao Chen ◽

Kefu Yu ◽

Qiucui Yao ◽

Zhiheng Liao ◽

Zhenjun Qin ◽

...

Keyword(s):

Genetic Diversity ◽

Genetic Structure ◽

Environmental Factors ◽

South China Sea ◽

Larval Dispersal ◽

Population Expansion ◽

Convergence Region ◽

Genetic Characteristics ◽

The Pacific ◽

The Pacific Ocean

The coral-eating crown-of-thorns starfish (COTS; Acanthaster spp.) play a major role in coral reef degradation in the Indo-Pacific region. However, the impacts of environmental factors on the phylogenetic and genetic characteristics of COTS in the northern Indo-Pacific convergence region remains unclear. We used mitochondrial DNA (mtDNA) and microsatellite markers to analyze the phylogenetic relationship, demographic history, genetic diversity and genetic structure of COTS in the South China Sea (SCS) and explored the impact of environmental factors on historical population expansion, genetic differentiation and larval dispersal. There was a clear signature of a population expansion in the SCS using the mtDNA marker. According to microsatellite loci analysis, COTS have high genetic diversity in the SCS. STRUCTURE analysis indicated that COTS in the Pacific Ocean can be divided into four subgroups: the SCS, Western Pacific, Pacific equatorial current affected zone, and Pacific insular atolls populations in the Pacific Ocean. Fst-statistical analysis revealed positive correlations between the Fst values and geographic isolation for all sampling sites. Additionally, there were no clear associations between the Fst values and chlorophyll a concentrations among coral reefs in the SCS; however, there were significant positive associations between the Fst values and particulate organic carbon (POC) concentrations within small geographic distances. These results suggest that COTS underwent historical population expansion after the Last Glacial Maximum, possibly followed by coral population expansion. The genetic structure of COTS populations may have been shaped by distinct nutrient concentrations, particularly those of POC, over small geographic distances. Moreover, ocean currents provide a potential dispersal mechanism for COTS larvae in the SCS. This study demonstrates that environmental and oceanographic factors play important roles in shaping the genetic characteristics and larval dispersal of COTS populations in the northern Indo-Pacific convergence region.

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Temporal genetic variation and dispersal patterns of Aedes albopictus (Diptera: Culicidae) among three different temperature regions of China

10.21203/rs.3.rs-38761/v1 ◽

2020 ◽

Author(s):

Jian Gao ◽

Hengduan Zhang ◽

Xiaoxia Guo ◽

Dan Xing ◽

YanDe Dong ◽

...

Keyword(s):

Genetic Variation ◽

Environmental Factors ◽

Aedes Albopictus ◽

Isolation By Distance ◽

Population Expansion ◽

Coi Gene ◽

Tropical Region ◽

Dispersal Patterns ◽

Temperate Region ◽

The Mean

Abstract Background Aedes albopictus is an indigenous and primary vector for Dengue and Zika viruses in China. Compare with its insecticide resistance, biology, and vector competence; little was known about its genetic variation, corresponding to environmental variations. Thus, the present study aims to discuss how Ae. albopictus population varies among different temperatures regions of China and decipher its potential dispersal patterns.Methods The genetic variation and population structure of all 17 Ae. albopictus populations, collected from three temperature regions of China, were investigated with 11 microsatellite loci and mitochondrial COI gene.Results 11 pairs out of 44 isolated microsatellite markers were chosen for genotyping analysis with the average PIC value of 0.713, which was high polymorphism. The number of alleles was high for each population, with the ne value increased from the Temperate region (3.876) to the Tropical region (4.144). 25 COI Haplotypes were detected, and the highest diversity was observed among the Tropical region. The mean Ho value (ca. 0.557) of all temperature regions, was significantly lower than the mean He values (ca. 0.684), with nearly all populations significantly departed from the HWE test and displayed significant population expansion ( p-value < 0.05).Two genetically isolated groups and three Haplotype clades were evaluated via STRUCTURE and Haplotype phylogenetic analyses, with Tropical populations isolated from other regions, significantly. Meanwhile, the majority genetic variation of Ae. albopictus populations were detected within populations and individuals at 31.40% and 63.04%, respectively, via AMOVA test, and a relatively significant positive correlation was merely observed among populations from the temperate region via Isolation by distance (IBD) analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations and a total of four major migration trends were rebuilt between the Tropical and the other two regions with the high genetic flows (Nm>0.5). Environmental factors, especially temperature and rainfall, may be the leading cause of genetic diversity differences of different temperature regions. Conclusions Continuous dispersion contributes to the similarity of Ae. albopictus populations among different temperature regions, and environmental factors, especially temperature and rainfall, may be the leading cause of genetic variation.

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Dispersal patterns and population genetic structure of Aedes albopictus (Diptera: Culicidae) in three different climatic regions of China

10.21203/rs.3.rs-38761/v4 ◽

2020 ◽

Author(s):

Jian Gao ◽

Hengduan Zhang ◽

Xiaoxia Guo ◽

Dan Xing ◽

YanDe Dong ◽

...

Keyword(s):

Genetic Variation ◽

Environmental Factors ◽

Aedes Albopictus ◽

Population Expansion ◽

The Other ◽

Tropical Region ◽

P Value ◽

Dispersal Patterns ◽

Climatic Regions ◽

The Mean

Abstract Background:Aedes albopictus is an indigenous primary vector for dengue and Zika viruses in China. Compared with its insecticide resistance, biology, and vector competence, little is known about its genetic variation, which corresponds to environmental variations. Thus, the present study examines how Ae. albopictus varies among different climatic regions in China and deciphers its potential dispersal patterns.Methods:The genetic variation and population structure of 17 Ae. albopictus populations collected from three climatic regions of China were investigated with 11 microsatellite loci and the mitochondrial coxI gene.Results:Of 44 isolated microsatellite markers, 11 pairs were chosen for genotyping analysis and had an average PIC value of 0.713, representing high polymorphism. The number of alleles was high in each population, with the ne value increasing from the temperate region (3.876) to the tropical region (4.144). Twenty-five coxI haplotypes were detected, and the highest diversity was observed in the tropical region. The mean Ho value (ca. 0.557) of all the regions was significantly lower than the mean He value (ca. 0.684), with nearly all populations significantly departing from HWE and displaying significant population expansion (p-value < 0.05). Two genetically isolated groups and three haplotype clades were evaluated via STRUCTURE and haplotype phylogenetic analyses, and the tropical populations were significantly isolated from those in the other regions. Most genetic variation in Ae. albopictus was detected within populations and individuals at 31.40% and 63.04%, respectively, via the AMOVA test, and a relatively significant positive correlation was observed among only the temperate populations via IBD analysis (R2 = 0.6614, p = 0.048). Recent dispersions were observed among different Ae. albopictus populations, and four major migration trends with high gene flow (Nm > 0.4) were reconstructed between the tropical region and the other two regions. Environmental factors, especially temperature and rainfall, may be the leading causes of genetic diversity in different climatic regions.Conclusions:Continuous dispersion contributes to the genetic communication of Ae. albopictus populations across different climatic regions, and environmental factors, especially temperature and rainfall, may be the leading causes of genetic variation.

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