scholarly journals Abiotic factors affecting habitat selection by two invasive gammarids Dikerogammarus villosus and Pontogammarus robustoides

Hydrobiologia ◽  
2017 ◽  
Vol 797 (1) ◽  
pp. 247-263 ◽  
Author(s):  
Jarosław Kobak ◽  
Łukasz Jermacz ◽  
Joanna Marcińczyk ◽  
Ewa Bartoszyńska ◽  
Daria Rutkowska ◽  
...  
Keyword(s):  
Habitat Selection ◽  
Abiotic Factors ◽  
Factors Affecting ◽  
Dikerogammarus Villosus ◽  
Pontogammarus Robustoides

Factors Affecting Habitat Selection by Breeding Lesser Spotted EaglesAquila pomarinain Northeastern Poland

2010 ◽  
Vol 45 (1) ◽  
pp. 105-114 ◽  
Author(s):  
Karol Zub ◽  
Eugeniusz Pugacewicz ◽  
Bogumiła Jędrzejewska ◽  
Włodzimierz Jędrzejewski
Keyword(s):  
Habitat Selection ◽  
Factors Affecting ◽  
Northeastern Poland

scholarly journals ASSESSMENT OF THE INFLUENCE OF ABIOTIC FACTORS ON THE ENZYMATIVE ACTIVITY OF THE SOIL

ÈKOBIOTEH ◽  
2021 ◽  
Vol 4 (2) ◽  
pp. 128-134
Author(s):  
E.V. Tovstik ◽  
◽  
A.S. Olkova ◽  
Keyword(s):  
Enzymatic Activity ◽  
Soil Solution ◽  
Ph Value ◽  
Abiotic Factors ◽  
Inverse Correlation ◽  
Invertase Activity ◽  
Soil Environment ◽  
Factors Affecting ◽  
Activity Of Enzymes ◽  
Made In

Аn attempt is made in this work to establish correlations between the level of enzymatic activity of the soil and factors of an abiotic nature. It was found that the activity of invertase and urease in the soils of more southern territories is higher than that of northern ones. In soils with a pH value of the soil environment close to neutral reaction, the level of enzymatic activity is higher than in more acidic ones. The most sensitive to soil acidity among the studied urease enzymes. In relation to zinc, an inverse correlation was established between its content in the soil and the level of invertase activity. According to the degree of resistance to salinity, the enzymes are arranged in the following order: catalase> invertase> urease. An increase in the mineralization of the soil solution leads to an increase in the activity of urease. Of the studied enzymes, the most labile are representatives of the class of hydrolases (invertase and urease), less labile are oxidoreductases (catalase). Thus, when diagnosing the state of the soil by the level of enzymatic activity, it is necessary to take into account the main abiotic factors affecting the activity of enzymes: the average annual air temperature; pH and mineralization of the soil solution; the content of substances that inhibit microorganisms and block exozymes.

scholarly journals Factors Affecting Egg Deposition of the European Mantis

2020 ◽  
Vol 68 (2) ◽  
pp. 45-49
Author(s):  
Joanna Kajzer-Bonk
Keyword(s):  
Habitat Selection ◽  
Environmental Conditions ◽  
Plant Cover ◽  
Egg Laying ◽  
Natural Conditions ◽  
Factors Affecting ◽  
Egg Deposition ◽  
Predatory Insect ◽  
Egg Case ◽  
Potential Tool

In this paper, we studied the egg-case (oothecae) deposition of the European mantis, Mantis religiosa (Linnaeus 1758), a predatory insect. We hypothesized that the height of ootheca deposition on a plant reflects the insolation requirements of the species, and would increase when plant cover is denser. We found that the taller the plants nearby, the greater the height of egg deposition. Oothecae were also oviposited higher in denser vegetation. The observed behavior may ensure the proper insolation of developing offspring. To our knowledge, this is the first description of an egg laying strategy of this species under natural conditions. This finding allows for a better understanding of habitat selection and the overall ecology of the European mantis. It may be also useful in identifying the mechanisms of the range extension of this species and is a potential tool to effectively conserve xerothermic ootheca-laying animals. Further studies are required to assess the flexibility of this behavior under different environmental conditions.

scholarly journals Quantifying the Influence of Larval Density on Disease Transmission Indices in Culex quinquefasciatus, the Major African Vector of Filariasis

2019 ◽  
Vol 11 ◽  
pp. 117954331985602 ◽  
Author(s):  
Azubuike Christian Ukubuiwe ◽  
Chioma Cynthia Ojianwuna ◽  
Israel Kayode Olayemi ◽  
Francis Ofurum Arimoro ◽  
Innocent Chukwuemeka James Omalu ◽  
...  
Keyword(s):  
Culex Quinquefasciatus ◽  
Disease Transmission ◽  
Abiotic Factors ◽  
Larval Density ◽  
Field Trials ◽  
Negative Effects ◽  
Laboratory Findings ◽  
Factors Affecting ◽  
Adult Fitness ◽  
Larval Crowding

Larval crowding is one of the abiotic factors affecting biological fitness in mosquitoes. This study aims at elucidating, quantitatively, the influence of more larval crowding on aspects of fitness in Culex quinquefasciatus mosquito. To this end, day-old larvae of the species were reared in 4 density regimens equivalent to 1 larva in 1.25, 2.5, 5, and 10 mL of distilled water. Developmental indices, adult fitness indices, and accumulation and utilisation of teneral reserves for metamorphosis were determined at these density regimens. The results revealed varying significant negative effects of larval density on all fitness indices measured for the species. The study also revealed high utilisation of teneral reserves for metamorphosis at high larval densities. The information generated will be useful in making informed-decisions in allocating scare resources for vector control, although field trials are advocated to establish these laboratory findings.

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