Mosquitoes (Diptera: Culicidae) Sampled from Treeholes and Proximate Artificial Containers in Central Missouri

1992 ◽  
Vol 27 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Mustapha Debboun ◽  
Robert D. Hall
Keyword(s):  
Leaf Litter ◽  
Relative Abundance ◽  
Tree Species ◽  
Mosquito Species ◽  
First Record ◽  
Aedes Triseriatus ◽  
White Oak ◽  
Culex Restuans ◽  
Toxorhynchites Rutilus ◽  
Culex Territans

The immatures of eight mosquito species in six genera were collected from treeholes and artificial containers at three sites in central Missouri from May - October, 1986 - 1988. The species most frequently collected was Aedes triseriatus (Say), followed in descending order by Anopheles barberi (Coquillett), Orthopodomyia signifera (Coquillett), Aedes hendersoni (Cockerell), Culex restuans Theobald, Culex territans Walker, Psorophora ferox (Humboldt), and Toxorhynchites rutilus septentrionalis (Dyar & Knab). Larvae of Ps. ferox collected from a basal white oak treehole were the first record of this species from this habitat. Larvae of Cx. restuans and Cx. territans were collected only from artificial containers and not from treeholes. Aedes triseriatus was opportunistic with respect to tree species inhabited, with distributions roughly paralleling the relative abundance of available treeholes. Artificial containers, even when enriched with leaf litter, did not constitute an adequate mimic for treeholes when sampling Ae. triseriatus immatures.

Caractérisation écologique des milieux humides à larves de moustiques (Culicides) de la région subarctique continentale d'Opinaca (territoire de la Baie de James, Québec)

1978 ◽  
Vol 56 (11) ◽  
pp. 2377-2387 ◽  
Author(s):  
Yves Mailhot ◽  
Alain Maire
Keyword(s):  
Mosquito Species ◽  
Riparian Areas ◽  
Culex Restuans ◽  
Breeding Sites ◽  
Qualitative And Quantitative ◽  
Salix Planifolia ◽  
Quantitative Analyses ◽  
Aedes Communis ◽  
Culex Territans

Twenty mosquito species were collected in a low-subarctic area located between Eastmain River and Petit-Opinaca Lake, Quebec (52°15′ N, 76°38′ W). Qualitative and quantitative analyses of larval mosquito populations identified 20 ecological units that served as larval breeding sites. The data revealed typical larval associations such as Aedes canadensis – Aedes decticus, characteristic of the open bog series, Aedes communis – Aedes pionips of alder–willow groves (Salix planifolia – Alnus rugosa), Aedes intrudens and Aedes cinereus in flooded riparian areas. The ecology of species with summer larvae is also described: Culex restuans, Culex territans, Culiseta alaskaensis, and Culiseta impatiens.

scholarly journals Urbanization pressures alter tree rhizosphere microbiomes

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Carl L. Rosier ◽  
Shawn W. Polson ◽  
Vincent D’Amico ◽  
Jinjun Kan ◽  
Tara L. E. Trammell
Keyword(s):  
Organic Matter ◽  
Relative Abundance ◽  
Tree Species ◽  
High Throughput Sequencing ◽  
Regional Climate ◽  
Keystone Species ◽  
Fagus Grandifolia ◽  
Yellow Poplar ◽  
Individual Tree ◽  
Structural Formation

AbstractThe soil microbial community (SMC) provides critical ecosystem services including organic matter decomposition, soil structural formation, and nutrient cycling. Studies suggest plants, specifically trees, act as soil keystone species controlling SMC structure via multiple mechanisms (e.g., litter chemistry, root exudates, and canopy alteration of precipitation). Tree influence on SMC is shaped by local/regional climate effects on forested environments and the connection of forests to surrounding landscapes (e.g., urbanization). Urban soils offer an ideal analog to assess the influence of environmental conditions versus plant species-specific controls on SMC. We used next generation high throughput sequencing to characterize the SMC of specific tree species (Fagus grandifolia [beech] vs Liriodendron tulipifera [yellow poplar]) across an urban–rural gradient. Results indicate SMC dissimilarity within rural forests suggests the SMC is unique to individual tree species. However, greater urbanization pressure increased SMC similarity between tree species. Relative abundance, species richness, and evenness suggest that increases in similarity within urban forests is not the result of biodiversity loss, but rather due to greater overlap of shared taxa. Evaluation of soil chemistry across the rural–urban gradient indicate pH, Ca+, and organic matter are largely responsible for driving relative abundance of specific SMC members.

scholarly journals Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Emma Stump ◽  
Lauren M. Childs ◽  
Melody Walker
Keyword(s):  
Population Dynamics ◽  
Competitive Advantage ◽  
Aedes Albopictus ◽  
Abiotic Factors ◽  
Mosquito Species ◽  
Disease Spread ◽  
Aedes Triseriatus ◽  
La Crosse Virus ◽  
The Impact ◽  
Ascogregarina Taiwanensis

Abstract Background Mosquitoes are vectors for diseases such as dengue, malaria and La Crosse virus that significantly impact the human population. When multiple mosquito species are present, the competition between species may alter population dynamics as well as disease spread. Two mosquito species, Aedes albopictus and Aedes triseriatus, both inhabit areas where La Crosse virus is found. Infection of Aedes albopictus by the parasite Ascogregarina taiwanensis and Aedes triseriatus by the parasite Ascogregarina barretti can decrease a mosquito’s fitness, respectively. In particular, the decrease in fitness of Aedes albopictus occurs through the impact of Ascogregarina taiwanensis on female fecundity, larval development rate, and larval mortality and may impact its initial competitive advantage over Aedes triseriatus during invasion. Methods We examine the effects of parasitism of gregarine parasites on Aedes albopictus and triseriatus population dynamics and competition with a focus on when Aedes albopictus is new to an area. We build a compartmental model including competition between Aedes albopictus and triseriatus while under parasitism of the gregarine parasites. Using parameters based on the literature, we simulate the dynamics and analyze the equilibrium population proportion of the two species. We consider the presence of both parasites and potential dilution effects. Results We show that increased levels of parasitism in Aedes albopictus will decrease the initial competitive advantage of the species over Aedes triseriatus and increase the survivorship of Aedes triseriatus. We find Aedes albopictus is better able to invade when there is more extreme parasitism of Aedes triseriatus. Furthermore, although the transient dynamics differ, dilution of the parasite density through uptake by both species does not alter the equilibrium population sizes of either species. Conclusions Mosquito population dynamics are affected by many factors, such as abiotic factors (e.g. temperature and humidity) and competition between mosquito species. This is especially true when multiple mosquito species are vying to live in the same area. Knowledge of how population dynamics are affected by gregarine parasites among competing species can inform future mosquito control efforts and help prevent the spread of vector-borne disease.

Leaf litter of invasive Chinese tallow (Triadica sebifera) negatively affects hatching success of an aquatic breeding anuran, the Southern Leopard Frog (Lithobates sphenocephalus)

2012 ◽  
Vol 90 (8) ◽  
pp. 991-998 ◽  
Author(s):  
C.K. Adams ◽  
D. Saenz
Keyword(s):  
Dissolved Oxygen ◽  
Leaf Litter ◽  
Tree Species ◽  
Quality Parameters ◽  
Leopard Frog ◽  
Stages Of Development ◽  
Triadica Sebifera ◽  
Chinese Tallow ◽  
Invasive Tree ◽  
Invasive Tree Species

Chinese tallow (Triadica sebifera (L.) Small) is an aggressive invasive tree species that can be abundant in parts of its non-native range. This tree species has the capability of producing monocultures, by outcompeting native trees, which can be in or near wetlands that are utilized by breeding amphibians. Existing research suggests that leaf litter from invasive Chinese tallow reduces survival in larval anurans. The purpose of this study was to determine the effects of Chinese tallow leaf litter on anuran eggs. We exposed eggs of the Southern Leopard Frog ( Lithobates sphenocephalus (Cope, 1886)) at various stages of development to different concentrations of Chinese tallow leaf litter to determine survival. Eggs in the earliest stages of development that we exposed to tallow leaf litter died, regardless of concentration; however, some more-developed eggs exposed to tallow leaf litter did hatch. We determined that the greater the concentration of tallow leaf litter, the lower the dissolved oxygen and pH levels we observed. We suggest that changes in these water-quality parameters are the cause of the observed mortality of anuran eggs in our experiments. Eggs exposed to water containing tallow leaf litter with dissolved oxygen <1.59 mg/L and a pH <5.29 did not survive to hatching.

Leaf litter age regulates the effect of native and exotic tree species on understory herbaceous vegetation of riparian forests

2020 ◽  
Vol 48 ◽  
pp. 11-25
Author(s):  
Paloma de las Heras ◽  
Silvia Medina-Villar ◽  
M.Esther Pérez-Corona ◽  
Beatriz R. Vázquez-de-Aldana
Keyword(s):  
Leaf Litter ◽  
Tree Species ◽  
Riparian Forests ◽  
Herbaceous Vegetation ◽  
Exotic Tree

scholarly journals The first record of the invasive mosquito species Aedes albopictus in Chişinӑu, Republic of Moldova, 2020

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Tatiana Șuleșco ◽  
Galina Bușmachiu ◽  
Unchana Lange ◽  
Jonas Schmidt-Chanasit ◽  
Renke Lühken
Keyword(s):  
Aedes Albopictus ◽  
Mosquito Species ◽  
First Record ◽  
Botanical Garden ◽  
Border Crossing ◽  
Molecular Barcoding ◽  
Republic Of Moldova ◽  
International Airport ◽  
Action Project ◽  
The Republic

Abstract Background In Europe, Aedes albopictus is an important vector of chikungunya virus and Dirofilaria nematodes and has been involved in local autochthonous circulation of dengue and Zika viruses. Due to the ongoing spread, targeted field surveillance at potential points of entry of invasive Aedes mosquitoes was initiated by the Republic of Moldova in 2020 as part of the transboundary “Invasive Aedes Mosquitoes COST-Action project.” Methods In 2020, ovitraps were positioned at each of three locations: the border crossing to Romania in Leuşeni (Hancesti region), Chişinӑu International Airport and Chişinӑu Botanical Garden. Results A total of 188 Aedes spp. eggs were collected at the Chişinӑu International Airport between August and September 2020. Twenty-three adults reared in the laboratory were identified morphologically as Ae. albopictus (Skuse, 1895), and 12 selected specimens were confirmed by molecular barcoding of the cytochrome oxidase subunit I gene region. In addition, one adult Ae. albopictus female at the same site was caught with a manual aspirator. Conclusions This is the first documented report of Ae. albopictus in the Republic of Moldova. The presence of immature and adult stages indicates the local reproduction of the species in the country. Therefore, it is crucial to extend and strengthen surveillance of the invasive Aedes mosquitoes to prevent Ae. albopictus and other exotic mosquito species from becoming established in the Republic of Moldova. Graphical abstract

scholarly journals Nutrients (N, P and K) dynamics associated with the leaf litter of two agroforestry tree species of Bangladesh

2009 ◽  
Vol 2 (5) ◽  
pp. 183-186 ◽  
Author(s):  
H Mahmood ◽  
SH Limon ◽  
MS Rahman ◽  
AK Azad ◽  
MS Islam ◽  
...  
Keyword(s):  
Leaf Litter ◽  
Tree Species

scholarly journals The influence of forest-forming tree species on diversity and spatial distribution of algae in forest litter

2018 ◽  
Vol 45 (2) ◽  
pp. 72-81 ◽  
Author(s):  
Yevhen Maltsev ◽  
Irina Maltseva
Keyword(s):  
Species Richness ◽  
Leaf Litter ◽  
Green Algae ◽  
Tree Species ◽  
Spatial Organization ◽  
Forest Litter ◽  
Equal Distribution ◽  
Blue Green Algae ◽  
Different Types ◽  
The Relationship

Abstract The forest litter plays a significant role in forest ecosystems. The composition of the litter biota comprises micro- and mesofauna, and a great diversity of microorganisms, including unrecognized algae (eukaryotic representatives and Cyanoprokaryota). The aim of this work was to study the diversity of algae in the different types of forest litters and to clarify the relationship between the algae composition and the forest-forming tree species. Our results show that the pine forest litter is the most appropriate habitat for the development of green and yellow-green algae and that this litter type limits the variety of blue-green ones. The admixture of deciduous leaf litter to pine litter caused an increase in the species richness of blue-green algae and diatoms. The algae were unevenly distributed across the sub-horizons of pine litter. The highest species richness of algae was identified in the enzymatic sub-horizon of litter. The peculiarity of the composition of leaf litter algae was a significant variety of green, yellow-green and blue-green algae. The spatial organization of algae communities in the leaf litter was characterized by equal distribution of algae species in the litter-subhorizons.

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