(i) Biotic potential is the maximum reproductive capacity of an organism under optimum environmental conditions. Read this article to find the most efficient and engaging biology topics for research that you can use in your biology paper! Such factors include the availability of essential resources (e.g. While resistance governed by minor genes is known as polygenic resistance. Major gene resistance is also designated as single dominant gene resistance or monogenic resistance. The factors such as shortage of food, disease, predation, environmental natural calamities which impose a check on population size constitute environmental resistance. On the contrary, antibiotic resistance takes place when bacteria change in some way that reduces the effectiveness of antibiotics. However, antibiotic resistance genes are not confined to the clinic; instead they are widely prevalent in different bacterial populations in the environment. The resistance develops due to change in the genotype in response to the environment, and is inherited. Here, you can browse videos, articles, and exercises by topic. Environmental biology programs are offered from the bachelor's to doctoral degree levels. Welcome to the Biology library! Some microbial groups show a high degree of metabolic flexibility and physiological tolerance to changing environmental conditions (e.g., ref. (ii) Environmental resistance. There are environmental limits, called environmental resistance factors, that affect the number of individuals that can survive and reproduce in a given habitat. Resistance can also be governed by minor genes with lesser efficiency, but not stable under varying environmental conditions. Emergence of antibiotic resistant pathogenic bacteria poses a serious public health challenge worldwide. Antimicrobial resistance is the resistance to drugs that treat the infections caused by microbes such as virus, fungi, etc. Nesme et al. study show that resistance genes in nonclinical environments (e.g., soil, oceans, or human feces) are abundant and distributed depending on the habitat type. "The power of population is so superior to the power of the earth to produce subsistence for man, that premature death must in some shape or other visit the human race. Carrying capacity is the number of organisms that an ecosystem can sustainably support. Soil is the most diverse environment, and genes found in the human gut are also detected in soil, emphasizing its resistance gene reservoir role for pathogens. 4.2 Population Growth and Regulation ... A 2008 study estimated that climate change reduced the mammoth’s range from 3,000,000 square miles 42,000 years ago to 310,000 square miles 6,000 years ago. An ecosystem’s carrying capacity for a particular species may be influenced by many factors, such as the ability to regenerate the food, water, atmosphere, or other necessities that populations need to survive. If the biotic potential is high then the populaltion growth rate is increased. Environment and Plant Ecology; Easy Biology Research Topics. Definition. 30), which could result in microbial communities that are resistant to change.These traits and others associated with microbes—such as … Similar resistance is reported also in insects which carry the causal agent for some other diseases like dengue fever, yellow fever, filariasis and river blindness. environmental resistance The sum total of the environmental limiting factors, both biotic and abiotic, which together act to prevent the biotic potential of an organism from being realized. The idea that microorganisms are resistant, resilient, and functionally redundant is pervasive in ecology. 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