Biotic and Abiotic Factors Affecting Brevicoryne brassicae (L.) (Hemiptera: Aphididae) and the Associated Hyperparasitoid Alloxysta fuscicornis Hartig (Hymenoptera: Figitidae) Morphologies

2012 ◽  
Vol 41 (4) ◽  
pp. 272-277
Author(s):  
Kleber Cleanto Faria Lemes Souto ◽  
M V Sampaio ◽  
H L Pedroso ◽  
C Lomônaco
Keyword(s):  
Abiotic Factors ◽  
Brevicoryne Brassicae ◽  
Factors Affecting ◽  
Biotic And Abiotic Factors

scholarly journals Identification and Evaluation of Factors Affecting Nectar Volume and Concentrations of Croton Macrostachyus Hochst.ex Delile

2021 ◽  
Author(s):  
Kasim Roba Jilo ◽  
Getachew Sime
Keyword(s):  
Relative Humidity ◽  
Sucrose Concentration ◽  
Abiotic Factors ◽  
Time Of Day ◽  
Factors Affecting ◽  
Nectar Volume ◽  
Biotic And Abiotic Factors ◽  
Honey Production ◽  
Nectar Concentration ◽  
Croton Macrostachyus

Abstract Background: Secretion of nectar is highly influenced by many factors and the objective of the study was also to evaluate factors affecting concentrations of nectar of Croton macrostachyus Hochst.ex Delile. Age of plants highly affect nectar concentration and volume. Honey quality and its medicinal values depends on plants species variety and their sucrose concentration quality and quantity which is governed by many biotic and abiotic factors as well micro climate of the area. Wholesale of nectar and concentration of tend to show more differences in time of day for species study undertaken.Results: As results publicized that nectar concentration and volume of youngest age was not more affected by temperature and relative humidity like that of medium and oldest ages. Temperature and age have significant effect on volume (p = 0.0001) and their interactions is also significant (p = 0.01145). Temperature has significant effects on nectar concentration (p = 0.000). Interaction of relative humidity, time, and layers has significant effects on nectar concentration (p = 0.0024012). The oldest plants had the highest concentration of 10.1 w/w mornings and afternoon 36.5 w/w at 4:00 PM for whereas medium plants had nectar concentration of 5.7 w/w morning and afternoon 16.7 w/w and the smaller or younger plants had nectar concentration of 2.7 w/w mornings and afternoon 9.1 w/w and this shows age significantly affect nectar concentration and volume.Conclusions:Concentration and volume were affected by many biotic and abiotic factors. I conclude imminent fever intensification could harm nectar production since for croton also no nectar could be collected at 30 C⁰ and no nectar recreation was observed after this peak temperature this indicates environmental change can increase the temperature which will have negative influences on honey production in the future unless we combat against climate change which will affect honey production and productivity for the country and we will lose honey and its medicinal values also.

Seasonal biotic and abiotic factors affecting hunting strategy in free-living Saharan sand vipers, Cerastes vipera

2017 ◽  
Vol 135 ◽  
pp. 40-44 ◽  
Author(s):  
Sefi J.A. Horesh ◽  
Jaim Sivan ◽  
Avi Rosenstrauch ◽  
Itay Tesler ◽  
A. Allan Degen ◽  
...  
Keyword(s):  
Abiotic Factors ◽  
Free Living ◽  
Factors Affecting ◽  
Biotic And Abiotic Factors ◽  
Hunting Strategy

scholarly journals Biotic and Abiotic Factors Affecting the Content of the Chosen Antioxidant Compounds in Vegetables

2012 ◽  
Vol 76 (1) ◽  
pp. 55-78 ◽  
Author(s):  
Anita Biesiada ◽  
Anna Tomczak
Keyword(s):  
Defense Mechanisms ◽  
Abiotic Factors ◽  
Antioxidant Properties ◽  
Mechanical Damage ◽  
Biologically Active ◽  
Antioxidant Compounds ◽  
Factors Affecting ◽  
Large Group ◽  
Biotic And Abiotic Factors ◽  
High Antioxidant Activity

Biotic and Abiotic Factors Affecting the Content of the Chosen Antioxidant Compounds in VegetablesVegetables are a rich source of biologically active substances, which support the body's defense mechanisms. A large group of these substances are compounds with antioxidant properties. Apart from vitamins (A, C and E), tocopherols, carotenoids, glutathiones and thiocyanates, polyphenols are also classified as the compounds of antioxidant properties being found in plants. They include: phenolic acids, flavonoids and hydroxycinnamic acid and among them a large group of anthocyanins. These compounds inhibit DNA damage in cancer cells, induce the production of insulin in the pancreas and protect the human brain from aging. They have also high antioxidant activity, which determines the defense mechanisms of plants under stress, such as temperature varia-tions, UV radiation, attacks by pests and mechanical damage. Their content may vary among individual plants of the same species, which is associated with a number of internal and external conditions, such as genetic factors, environmental and agronomic. The contents of anthocyanins determines plant species, botanical variety and breeding and biological processes associated with ontogenesis. Also climatic and soil factors, the factors influencing the content of antioxidants and agronomic factors such as method, place and date of planting, fertilizing, mulching, salinity may contribute to the formation of stress conditions during plant growth and increase the content of antioxidants in plants. This review focused on the content, composition, and antioxidant capacity of vegetables.

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