Daphnia Heart Rate and Kcl

After the Daphnia was given time to calm down, the team took a reading of its heart rate at room temperature (27 degrees C). The reading was taken by counting the heart beats for ten seconds and then multiplying by six to yield beats per minute. Next, a glass Petri dish was filled with ice water at five degrees Celsius. The cold water Petri dish was placed on the stage of the microscope, and the Daphnia was placed on top of the dish. When the Daphnia had been given a minute to acclimate to the changes, another heart rate reading was taken. Then the same procedure using the Petri dish to changed environmental conditions was used with cold tap water (23 degrees), warm tap water (30 degrees), and hot tap water (45 degrees). A heart rate reading was taken for each temperature.

Acidity of an ecosystem, measured in pH, is a crucial factor to the survival of a species in an ecosystem. Altering it can have result in dramatically negative effects, in spite of the fact that pH of an ecosystem has been dramatically changed over a relatively short period of time due to various human activities. For example, acid rain is a major environmental problem that is caused by human-made pollution. When fossil fuels are burnt to get energy, pollutants like sulfur dioxide and nitrogen oxides get mixed into the rainwater and eventually are evaporated into the atmosphere. These gases enter the atmosphere, and mix with water in the water cycle to form an acidic mixture of water and gases. This water falls in the form of acid rain, which

This experiment was done to test whether or not the drugs Nicotine, Alcohol, Pain Killers, Nyquil, and Caffeine were stimulants (increase in the body’s metabolism and consequently increase the heart rate) or depressants (slow the rate of metabolism and consequently slow the heart rate) of the homeostasis (the ability of one’s body to maintain a constant internal environment) of Daphnia.

This experiment is being performed to show the effect of pH levels on daphnia by changing pH levels and measuring the heart rate.

When ammonia is present in water at high enough levels, it is difficult for aquatic organisms to sufficiently excrete the toxicant, leading to toxic buildup in internal tissues and blood, and potentially death. Environmental factors, such as pH and temperature which affects the solubility of ammonia (NH4 to NH3) in water making it toxic, can affect the lives of aquatic animals. It is observed in the results that temperature was high than normal leading the ammonia concentration to be high as about 2.0mg/l in the sample water from Dandenong Creek which is not suitable of aquatic life to live in for a long time. Toxic levels of ammonia are both pH and temperature dependent. Toxicity increases when pH and as temperature increases. Mammals are

In the second experiment in which I used acid and base an my experimental factors. Using the C1V1=C2V2 formula, to measure the different concentrations of the base and acid. Through the calculations that I did, I was able to find three concentration of each the acid and the base. A 1mL , 10mL and 100mL acid concentration and the same concentration for the base. In addition, using this different concentrations, I repeated the procedure I did in the first experiment for each mL of concentration that I measured. Pay attention to the daphnia when it is on the glass slide. One should check it every one minute to make sure that the daphnia is still alive. This is different from the ethanol and caffeine experiment in which I checked how each daphnia

Water Pollution is one of the most serious ecological threat faced in this modern era. Water pollution is a result of toxic substances entering water bodies such as lakes, rivers and oceans etc. These toxins can either dissolve in the water, lay suspended in the water, deposit on the water bed or contaminate ground water. This not only results in degradation of water quality but also means destruction of aquatic ecosystem.

The introducing to any type of pollution, man-made or artificial, can have an outstanding effect to a natural environment. When the word of pollution is thought of, it’s never a positive thought and can do harm to where humans and many different organism lives. There are many different freshwater pollution and each one of having it one effect. One of the organism that live is fresh water is Ankistodemus, a green alga that grows in fresh water pond and lakes. When Sodium chloride (salt) is added to the alga environment what type of effect will it have on its growth? The importance of this experiment to make aware of how pollution have a stern effect on the living things around the Earth. Being alert of this will expression how putting more care on the environment will extend the life span of the Earth. The goal of adding Sodium chloride, the pollutant, to water, that Ankistodemus live in, is for illustration how Sodium chloride will inhibit the growth of Ankistrodesmus algae.

A Biome is an enormous community of living things inhabiting a major habitat. Bodies of water is an aquatic biome. For example, oceans, lakes and rivers are aquatic biomes. It’s a natural resource that covers around 70% of the Earth’s surface. Aquatic biomes are very significant in supporting life on earth. These biomes supply fresh water for drinking, support the irrigation of crops and provide the food humans eat to survive. However, an external factor, humans, are having a great impact on the survival of aquatic biomes. Because of humans, the Earth’s waters are becoming polluted. Overfishing is reducing the amount of fish in the ocean, and aggressive fishing practices are damaging coral reefs and other habitats living in the water. The impact of human activities has severely damaged these aquatic biomes and conservation and preservation is needed for their survival.

One of the most significant concerns that have existed in the ecosystem for decades now is the issue of pollution. Pollution in itself is the destruction of the normal concentration and manifestation of factors such as water, soil, air and others in the ecosystem. This destruction largely arises from the human activities that often lead to misbalance, increased wastes concentration and improper positioning of the necessary and unnecessary additions to the environment. This often leads to the destruction of biodiversity, which is an important balance to the whole cycle of living organisms in that they support each other for their co-existence. If at all the number of animals reduce in the world to a very small number then a threat is posed to the living organisms since it will translate to it having to reduce also (Turner 2014).

Realistic aquatic and terrestrial ecosystems are constantly adapting to various disturbances of anthropogenic and natural origin. According to the “Alternative stable state theory” ecosystem has various states and can switch from one state to another when ecosystem conditions are changing (Holling, 1973; Scheffer, 2001). When the magnitude of such disturbance is negligible, the shift in the ecosystem structure and functioning does not occur. In this case the ecosystem resilience allows it to return to its original state (REF). Population densities are changing rapidly in response to a small disturbance. Such quantitative change does not necessarily lead to ecosystem structural and functional shift. On the other way around, when

The lifestyle of the amphibian is very complex and fragile. Just the mere fact that amphibians are biphasic causes them to run into a variety of problems. Since they deal with both an aquatic and terrestrial environment, they tend to run into an increased amount of pollutants and environmental changes. Pollution both on land and in water can affect water pH and other variables that can be very harmful to an amphibian’s survival. Since amphibians can be used basically as biomarkers to the environment, the study and resolution of this problem can aid in two conservation efforts. Not only will we be able to increase amphibian populations but we also help make environments less polluted. Healthy amphibians equal a healthy habitat for all.

Pollution in water disrupts the natural habitats. Many animals that live in the various bodies of water end up dying because of the foreign pollutants. Fishes, birds, carbs, dolphins, etc. die and wash up at the seashore as a result. Once the pollutants such as lead and cadmium. The bigger sea animals eat the smaller ones and passes on the pollutants to the other animals. This process affects the food chain as a continuing process.

Water pollution affects plants and organisms living in these bodies of water; and, in almost all cases the effect is damaging not only to individual species and populations, but also to the natural biological communities.

Pollution is becoming dangerously high and it is beginning to affect wildlife. Due to the water being contaminated, they have no safe drinking water. These high levels of pollution in the animals’ drinking water are causing the extinction of certain species, and it may be of a species that is already rare or have a scarce number of.