Water Salinity Lab Report
Based upon differing water salinities, the experiment tests the most favorable salinity level of Littorina spp. by measuring the movement produced. The experiment used a separate exposure treatment with the four treatments being 10, 20, 30 and 40 parts per thousand (ppt) saltwater. In trial 1, a moderate and a lower salinity environment were set up to determine which salinity the snails would best adapt to; thus, producing the most movement. Two separate arenas were created in 20 cm glass container with 200mL of 10 ppt and 30 ppt salinity water in their respective arenas, with 14 replicates being used. Similar to trial 1, the same two separate environments were set up in trial 2. However, a different high and a moderate salinity of 20 ppt and 40 ppt were used, with 16 replicates each. …show more content…
To conduct our experiment, we used two 20cm glass containers and fill them up with exactly 200 mL of respective salinities. To ensure that no water velocity is influencing the species tested, the water was settled down before moving our snails into the arena. The glass containers had been marked on the bottom to determine the center of the container. All the snails tested were then placed at the marking and were timed for 1 minute 30 seconds allowing 5 seconds for the snails to acclimate the conditions. The path of the snails was then traced using the acetate sheets and after the allotted time the length of the path was measured using a string and a
Effects Of Abiotic And Biotic Factors At Nudgee Beach
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Isopod Lab Report
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Hastings Point Lab Report
1610 Words | 7 PagesThe black nerite was observed 76 times in the upper 25 meters of the rock pools, which has been defined as the supralittoral zone. The black nerite has adapted in many ways to successfully survive the harsh biotic and abiotic conditions associated with the supralittoral zone. The supralittoral zone has a categorically large amount of predation, and the black nerites have adapted structurally to deal with this. They have developed a tough, dark shell which not only prevents predators from accessing the snail inside, but acts as a camouflage, matching the dark coloured rocks. This tough shell also helps the nerites survive in the often dry and hot supralittoral zone, where a decrease from 83%RH to 75%RH was seen at Hastings Point.
Chesapeake Bay Ecosystem Analysis
206 Words | 1 PagesThe oysters are an integral element in any saltwater ecosystem, including the Chesapeake Bay ecosystem. The oysters are a significant component of the Chesapeake Bay ecosystem due to their ability to filter particles from water, which results in a cleaner water quality (Jacobson, 2013). The bay is currently experiencing a long-lasting drought, and the Department of Natural Resources is concerned that such crisis will leave a repercussion for the Chesapeake Bay water quality. The salinity level of the bay has been greatly affected by drought, which is influencing the oyster population of the bay. Historically, the salinity level of the bay has been 10 to 13 parts per thousand (ppt).
Sodium Chloride Lab
896 Words | 4 PagesThe purpose of this report is determine if sodium chloride is a viable option as a deicer on winter roads. To determine this, one must compare a multitude of factors. In this lab, the freezing point depression of water, enthalpy of dissolution, cost, and environmental impact will be discussed. A large factor in how effective a substance is as a deicer is it’s ability to decrease the freezing point of water. If the freezing point of water can be lowered, the outside temperature must be much colder to reach this new freezing point, resulting in less ice on the roads.
Environmental Conditions Of Brine Shrimps
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Chesapeake Bay Restoration Project
399 Words | 2 PagesThe Chesapeake Bay Oyster Restoration Project aims to help locate a healthy habitat for oysters. The Chesapeake Bay has been affected by the long-lasting drought in Maryland, which influenced the water quality. The drought increased the salinity of the water which has a negative impact on the oysters. According to the National Oceanic and Atmospheric Administration, “the native oyster is an extremely resilient species, able to tolerate wide variations in salinity and temperature—but it has not been immune to the pressures of disease, overharvesting, and pollution in the Chesapeake Bay. As a result, native oyster populations in Chesapeake Bay are at less than 1% of historic levels” (A,& Blue Water Media).
Algae Growth Lab Report
843 Words | 4 PagesThe end rating of the Salt #2 container was 1, which is not as high as the end rating for the positive control: 1.5. This was because salt cause the algae cells to pump water out of the cell into the hypertonic outside environment. As a result, the cell membranes inside the cell to shrivel and the cell to die. However, adding 0.5 mL of salt was probably not
Essay On The Effect Of Temperature On Osmosis
1159 Words | 5 PagesFor this lab I will be using water and sucrose to demonstrate the rate of osmosis. In this lab I will be exploring how temperature impacts the rate of osmosis by placing pieces of potato of equal size in solutions of different temperatures and observing the change in mass of potato after a given period of time. The change in mass will indicate the rate of osmosis.
Isopods Vs Pillbugs
1003 Words | 5 PagesIn this experiment, we are testing whether or not the Isopods' have more of a preference for an environment with syrup or with water. The alternative hypothesis we devised is that if the Isopods are placed in between a syrup and a water chamber, then they will go towards the syrup chamber. This is believed because we believe the Isopods may have an attraction to the sweet scent and taste of the syrup. My group and I observed 10 pillbugs behavior over the span of 5 minutes, recording the number of pill bugs found in each chamber every 30 seconds. We fail to reject the null hypothesis because the chi squared value is 3.6 which is less than 3.84 (critical value at .05).
Summary: The Top-Down Effects Of Brine Shrimp On Algae
1219 Words | 5 PagesThe brine shrimp were hatched from cysts in seawater and placed in jars, and the algae were contained in large flasks of seawater in various concentrations, for everyone to access. The number of brine shrimp were our independent variable and the algae concentration were our dependent variable. We obtained 6 clean jars for our group in which we created our miniature ecosystems. We labeled each jar with our group name, lab section number, and replicate number. After deciding on what algae concentration we wanted to hold constant in our jars, we calculated the volume of seawater and algae solution required to achieve the desired algae concentration of 50,000 cells/mL and a total volume of 50 mL (C1V1=C2V2).
Daphnia Red Light Lab Report
1248 Words | 5 PagesIntroduction: Daphnia play a vital role in the ecosystem because they are an important part of the aquatic food web (Miner et al., 2012). When exposed to UV light, Daphnia swim deeper into the water (Morris et al., 1995). This natural movement is called phototaxis. Daphnia have been utilized as test subjects due to their simplicity and how environmental disturbances have impacted their ability to survive, including UV light.
Water Hydration Lab Report
603 Words | 3 PagesIntroduction: In this lab, of water in a hydrate, or a substance whose crystalline structure is bound to water molecules by weak bonds, is determined by heating up a small sample of it. By heating, the water of hydration, or bound water, is removed, leaving only what is called an anhydrous compound. Based on the percent water in the hydrate, it can be classified as one of three types: BaCl2O ⋅ 2H20, with a percent water of about 14.57%, CuSO4
Potato Osmosis Lab Report
1078 Words | 5 PagesBiology Design Practical Joshua Edwards What are effects of the volume of a potato and the amount of weight it loses when placed in salt solution? Introduction This design practical uses a potato’s surface area to volume ratio to see what affects it has on osmosis in different concentrations. Osmosis is the movement of water molecules through a cell membrane into an area of a higher solute concentration. The movement goes the way of the solvent with more solute because the lower solute concentration is drifting through balancing the ratio of solute per solvent (En.wikipedia.org, 2018).
Literature Review On Eutrophication
754 Words | 4 PagesIt is well known that eutrophication occurs when excess nutrients are added to a body of water and primary productivity is increased. However, the scientific paper, Aquatic eutrophication promotes pathogenic infection in amphibians, puts a direct focus on a specific parasite, Ribeiroia ondatra, and seeks to give evidence that the onset of eutrophication is the driving factor allowing the parasite to disrupt amphibian development. The authors set-out with the goal to provide evidence that eutrophication leads to an increase in the number of snails as intermediate hosts for the parasite, while also increasing the snail size and reducing snail mortality; providing more candidates to pass the parasite onto amphibians to inhibit their development. This research, as stated in the paper, looks to identify eutrophication as the factor promoting this pathogenic infection in the amphibians. Although some have tried to pinpoint this already, no evidence prior had been provided to
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