A decrease in rainfall means there is less water in aquifers and the water table. This means the supply of water has decreased. A warmer climate also means more water evaporates from seas and oceans. This can be bad as it can increase the number of floods which destroys infrastructure. Another factor that can affect water supply is urban development and over extraction.
a) Biotic describes a living component of a community; for example organisms, such as plants and animals. b) abiotic components (also known as abiotic factors) are non-living chemical and physical factors in the environment which affect ecosystems. c) Herbivores are organisms that are anatomically and physiologically adapted to eat plant-based foods. Herbivory is a form of consumption in which an organism principally eats autotrophs such as plants, algae and photosynthesizing bacteria. More generally, organisms that feed on autotrophs in general are known as primary consumers.
Nitrogen fixing bacteria in the roots of leguminous plants reduce atmospheric nitrogen to ammonium using ATP and reduced NAD. The ammonium ions released into the soil are oxidised by nitrifying bacteria firstly to nitrite, and then to nitrate. This oxidation increases the nitrogen content in the soil which plants can use to produces many useful molecules including amino acids, proteins, DNA and ATP. The formation of these ions forms part of the ecological nitrogen cycle which plays a key role in sustaining life on this planet. Plants are the producers for an ecosystem.
After the algae accumulate, it dies, decomposes and depletes the oxygen in the ocean creating a dead zone. Natural elements of climate, weather and change in wind circulation also cause changes in algae growth. In the spring months increased rain, water flow and sunshine increase this algae growth. In the fall tropical storms and hurricanes break up the algae and the cycle repeats again. The largest human cause of dead zones is nutrient run off from abundant use of fertilizers, animal waste and sewage.
Describe the trophic levels in a typical ecosystem. Discuss the flow of energy through the ecosystem, the relationship between the different trophic levels, and the factors that limit the number of trophic levels. Trophic levels are the position that an organism occupies in the food chain. Organisms at higher trophic levels prey upon those at lower trophic levels. The bottom level is the source of energy for the higher levels.
Phosphate: Increase due to reduced excretion in urine. Blood Urea Nitrogen: Increase indicates inability to excrete urea; suggest renal dysfunction. Creatinine: Increase indicates inability to excrete Creatinine; suggests renal dysfunction. Albumin: Decrease indicates loss of protein into urine. pH: Decrease indicates acidosis Urinalysis: Protein: Significant increase due to loss in urine: suggest renal dysfunction.
Why are ecological pyramids shaped as pyramids? (1 point) A. because there is a large decrease in the amount of energy or biomass as you move from one trophic level up to the next B. because the movement of energy through the biosphere follows a path similar in shape to a pyramid C. because decomposers form a wide base of support at the bottom of a food web similar to the base of a
. Design a) Defining the problem and selecting Variable I) Aim/Research Question: To investigate the effect of solute concentration on the length of potato strips when submerged in a range of concentrations of sugar solution. II) Hypothesis: If the concentration of the sugar solution increases, then the osmotic gain of the potato strip will decrease. III) Scientific Explanation: Osmosis is a type of passive transport where passive movement of water molecules occurs along a concentration gradient, across a partially permeable membrane. (Damon, )Since the movements of substances in passive transport take place from an area of high concentration to an area of lower concentration until both areas reach equilibrium, the water molecules will move from the potato strips to the sugar solution when there is less water concentration in the solution.
Causes of water pollution include: * Increased sediment from soil erosion * Improper waste disposal and littering * Leaching of soil pollution into water supplies The effects of water pollution include decreasing the quantity of drinkable water available, lowering water supplies for crop irrigation and impacting fish and wildlife that require water of certain purity for survival. 3. Soil Pollution Soil, land pollution is contamination of the soil that prevents natural growth and balance in the land
Consequences The most conspicuous effect of cultural eutrophication is the creation of dense blooms of noxious, foul-smelling phytoplankton that reduce water clarity and harm water quality (Figure 2). Algal blooms limit light penetration, reducing growth and causing die-offs of plants in littoral zones while also lowering the success of predators that need light to pursue and catch prey (Lehtiniemi et al. 2005). Furthermore, high rates of photosynthesis associated with eutrophication can deplete dissolved inorganic carbon and raise pH to extreme levels during the day. Elevated pH can in turn ‘blind' organisms that rely on perception of dissolved chemical cues for their survival by impairing their chemosensory abilities (Figure 3) (Turner & Chislock 2010).