The fish in EcoMUVE died because of a chain reaction of abiotic factors leading to the lack of dissolved oxygen. The first event occurs on the first playable date, June 30, when fertilizer was put on the ground. This is qualitative data from the quote of NPC Manny saying, “I think this extra fertilizer I picked up should do the trick.” Subsequently, on July 6, a storm caused a surface runoff. Consequently, phosphates and nitrates in the fertilizer fled into the pond, causing phosphates to be at 0.1 and nitrates to be at 0.56. Phosphates and nitrates are nutrients for plants, therefore algae populations grew higher (Bluegreen algae to 1300, Green algae to 5500) and phosphate and nitrate levels went back down to .03 and .33 respectively. The algae did photosynthesis, which produced dissolved oxygen, thus from July 6-16 dissolved oxygen levels were around 9-10. The large number of algae increased the amount of chlorophyll (chlorophyll at 100), which increased the amount of turbidity (turbidity at 65). Turbidity blocks sunlight, therefore the algae could not do photosynthesis. Algae populations plummeted after July 16, for they could not produce food because they are autotrophs. Ultimately, these …show more content…
From July 16-25, bacteria started to feed off the dead algae matter. The bacteria population skyrocketed, becoming 8x higher than it used to be on July 10 (5,000 40,000). Not only was little dissolved oxygen being made, but also the last of the oxygen was being used by the bacteria. On July 22 and 25, dissolved oxygen levels were 5.4 and 4.1 respectively. On July 28, bluegills and largemouth bass died because of the extremely low oxygen levels and high turbidity levels. Their populations were both zero. Minnows survived the incident. This is due to the fact the field guide states “[Minnows] can survive even when the water reaches high temperatures, has high turbidity, or has low
. As seen in the video, an oyster’s ability to filter feed gives them the helpful ability to clear up murky waters. In the experiment, the oysters started reducing the turbidity of the water within minutes of being placed in the tank. Although these result would most likely not occur this quickly on the large scale, in is indisputable that the oysters would reduce the turbidity of the water; allowing the plants to photosynthesize once again.
In this paper I will examine multiple perspectives in an attempt to understand the recent eutrophication of the Chesapeake Bay. Our textbook, Cambell Biology defines eutrophication as a process in which nutrients, usually phosphorus and nitrogen, are unusually present in a body of water, leading to algae blooms and accelerated growth. Anoxia is a condition in which areas of water are severely depleted of dissolved oxygen.
For the entirety of the project the water had an awful scent. The water was a brownish or yellow color till the last time my group check on the ecosystem. The latest checkup, the water was clear. It turns out that the reason why the color was that color because the plant progressively throughout the project died. The coloring is from organisms breaking down the bacteria. The water turned clear because the bacteria was finally all cleared up. I was interested in how the beta fish that was in the same section of the ecosystem as the snail, played dead most of the time. From doing some research on this observation, it shows that this type of behavior is common. This happens because the beta fish might have a bladder disorder or the person
With all if the pollution, fish die. The pollution can cause no oxygen in the deeper part of the lake for animals. Studies show that in the late summers, parts of the lake do not have oxygen for animals in the deeper parts. From that, animals
In the following figure 1, the amount of lakes were present in the summer of of 1975 shows that many lakes existed before the pH level was non existent. As soon the pH level increased, the fish disappeared as well as the lakes. In spite of the fact that there are few spikes once in awhile; it is conceivable that the fish attempted
I can vividly remember playing a game of ‘Go-Fish!’ with my Father. I began to grumble because my hand contained no matches and all around bad cards. My father consoled me by saying, “It's not about the cards you're dealt, but about how you play the hand.” As a 5 year old, I would have much rather preferred my father slipping me a wildcard than hearing some foreign metaphor; however, this is the exact philosophy that will determine my life successful when I reflect in 30 years.
Scientists are concerned that the runoff from excess potting soil combined with lower-than-normal river flow has caused toxic blue algae to appear in North Coast Rivers over the last decade. The bacteria pose a risk to swimmers and kills aquatic invertebrates that salmon and trout eat. Officials have had to warn residents and their pets to stay away from the rivers. So far, 11 dogs have died from the bacteria since
I don’t agree with your statement about the cause of the many fish dying off in the Gray Area. To start off, you stated that the chlorine was not killing the fish, although tests proved that 8 fish were killed in result of chlorine from the waterpark. To add on, Ken Unballe stated that,“When we were forced to re-test on different days, we did find too much chlorine in the water”. Proving, chlorine is part of the fish dying off. In addition, phosphate tests on the cattle ranch also showed that the phosphate levels were not too high. Unlike, the phosphate levels in the golf course, which could be killing the fish. Phosphates build up in the water and cause more plants to grow, creating less oxygen to breathe. They do not poison fish. To add on, the oil found on the beach near Synchrony City was car oil, NOT refinery oil. Showing, that the refinery and cattle ranch can’t be killing the fish.
I got a little tired and bored of cutting and glueing each layer, but when I was done, I really liked how it
In many studies overtime , these safe levels of phosphorus are not being met, and in the Great Lakes in Canada, phosphorus levels are continuing to rise in these freshwater sinks, resulting in detrimental effects for all organisms. When there is a sufficient amount of phosphorus in these bodies of water, an algae bloom may appear. Algae blooms are large green or blue masses that cover the surface of the lake or body of water with excess nutrients such a nitrogen and phosphorus. These masses eventually decay overtime and settle. For many bacteria, this decaying matter can be food, allowing for their population to grow. Overall more of the dissolved oxygen significantly decreases which causes the aquatic life to die. This is
Hypoxia defines as oxygen deficiency that had influence benthic communities through time. In broad-scale effects of hypoxia it had studied that it has positive and negative result in the ecosystem. Organisms living near the seabed commonly called benthic organism mostly depends nutrients from inorganic material such as oxygen. Critical decrease of oxygen may lead to the alteration of benthic density, biomass and diversity. In Chesapeake Bay, USA, hypoxia is typically a summer phenomenon according to Seitz et.al due to the runoff, sinking of algal blooms, high benthic respiration and stratification of water. Severity decrease of oxygen leads to hypoxic stress wherein flux in the ecosystem levels were observed. Though main effects are adverse such as reduction of benthic species abundance and biomass it also attributes a change in behavioral response of benthic organism, that are either
With changes with the food web this meant that there was fewer food sources. Which meant fewer fish.This also meant that other mussels that also eat plankton went from 1 billion to about none. Also the dissolved oxygen went down 15% not enough to endanger any sea life.
I took observations each day to keep up with the experiment. Within three days, four fish had already died.
There’s a river on the edge of Missouri where my family and I camped. My uncle called it “The ole’ Roarin’ River” because the river was always impossibly full of life and movement. My cousin and I decided, on the edge of daybreak, that we should take a swim. We jumped in and my petite self started to drift quickly downstream. My cousin yelled and motioned for me to swim. I was so scared that I might drown but the internal fire in me was fueled by the terrifying and dire situation. I made it to the edge of the river and climbed out yelling and jumping because I had done what I never thought was possible. I fought the current.
In an aquatic ecosystem most of the nutrients are well balanced with the biodiversity of organisms. [FIND DISCOURSE MARKER TO ADD TWO SENTENCES] These aquatic ecosystems become disrupted when eutrophication (the presence of excessive and unwanted nutrients), occurs. Nutrients from agricultural, industrial and urban areas enter a drainage basin (streams, rivers, lakes, dams and ultimately, the ocean) by means of run-off and groundwater. Certain organisms; for example, phytoplankton and algae, benefit from these nutrients which causes them to reproduce faster and amalgamate, forming a dense layer on the surface of the water. As a result, sunlight and oxygen cannot enter the water, causing extremely high carbon dioxide concentration levels and very low oxygen concentration levels. Due to a lack of oxygen, aerobic organisms experience hypoxia or suffocation and die.