Essay on Mark: Biology and Population Growth Rate

Methodology: The water samples will be collected utilizing sterile plastic water bottles from Lake Tarpon. The location the samples will be collected from is Anderson Park, by the boat docks, located at 39669 U.S. 19, Tarpon Springs, FL 34689. The water samples will be brought to Tarpon Springs High School to be tested, located at 1411 Gulf Rd, Tarpon Springs, FL 34689. The phosphate, nitrate, and dissolved oxygen levels will be tested utilizing various LaMotte water testing kits,

2) [6.2] In Microsoft Excel (I’ve provided an Excel spreadsheet, but you are welcome to use the spreadsheet application of your choice: Google Sheets, OpenOffice, etc.) plot a line graph of your green algae population size data to show how green algae relate to phosphorus input levels. Think about which is the dependent and which is the independent variable. Be sure to label your axes. Copy your completed graph into the

Crawfish naturally excrete phosphorous as well as nitrogen, and have enabled the lake to have a faster turnover rate within its waters thanks to their large numbers (University of Davis Centers for Water and Wildlife Resources, 1996). Warm-water fish not native to the Lake Tahoe area have also begun to thrive within the near shore environments because of the increase in water temperature, and continue to intrude on native fish. The rise in water temperatures is most likely from an increase in algae production within the near shore areas caused by the production of nutrients by the Asian clams, which in turn then feeds the growing crawfish population.

Through our research we aimed to determine if there were any differences in water quality of both the north and south forks of Strawberry Creek. As time progresses and the environment changes it is important to keep track of how certain species are being impacted by these features, and how they cope with change. We hypothesized that due to the lack of pollution, the south fork will promote a greater diversity of macroinvertebrates. This was due to the fact that there was less runoff and trash that could be introduced to the water in the south fork, than there was in the north fork. We gathered data by analyzing the different organisms living in both forks. We collected a total of fifty vials composed of five organisms from each fork, and inspected them under microscopic view. After gathering data and identifying the different kinds of organisms living in the different forks we assessed whether the organisms from the samples could live in high or low resolution water. We also took a t-test to assess the probability of these differences being due to relevant factors or by chance. Our major findings suggest that organisms in the south fork showed a higher demand to living in cleaner water indicating that our hypothesis was correct.

The purpose of this is experiment is to more closely understand the effects of nutrient enrichment on samples of water from Encanto Park Lake and the Rio Salado River. More specifically the concentration of nitrogen, phosphorus, and nitrogen and phosphorus together were altered and the effects this had upon algal growth were then observed. The results indicated that an increase in nitrogen concentration showed minimal

Phosphorus, “...the primary algae-feeding nutrient in Lake Erie, and contributed to the largest algae bloom in history last year” (McCarty, para. 3), is a key factor in how

When looking over my results, I found that the pH level increased from a neutral pH to a basic level of pH. The Miracle- Gro fertilizer that I used is supposed to have a pH of 7. This surprised me because I would think that adding a 10% fertilizer solution would make the water acidic. I thought that the fertilizer would be more acidic because when we learned about rivers, we found out that acid rain decreased the dissolved oxygen levels; also, Eutriporication results in low dissolved oxygen levels. Therefore I believed that the fertilizer would be acidic because of my background knowledge of dissolved oxygen in water. Regardless, the basic water killed the algae, elodea plant and the snails in the water. I also thought that eutrophication would occur in the water when

Water column phosphorus concentrations have also been shown to increase under anoxic conditions (Webb, K.L. and D'Elia, C.F. 1980). This is because some of the iron oxyhydroxides that

For an existing habitat, an increase in salt levels will begin to show an effect on the abundance and diversity in species of zooplankton. This will exhibit a detrimental effect on the daphnia from the limited osmoregulatory capabilities of the organisms. This in turn can pose a risk to the level feeding rates and survival (Heine-Fuster, Vega-Retter, Sabat & Ramos-Jiliberto,

One of the things students tested in the creek was the chemical composition. We were testing for eutrophication and acid rain pollution. As was aforementioned, eutrophication is extra nutrients in the water. It comes from runoff from the land through the form of overfertilization and sewage treatment plants. The tests performed to test for eutrophication were nitrate and phosphate tests. The phosphate and nitrate tests were conducted by filling a cup with water and breaking the tip of an ampule so it would fill with water. The liquid in the ampule would change color based on the amount of phosphate or nitrate in the water. Phosphate is a salt or ester of phosphoric acid containing PO43− or a related anion or a group such as —OPO(OH)2 in fertilizers and sewage treatment plants. Either or both of those two things could have runoff from the land and drained into the creek. They are negative to the creek. Our results showed that the creek

What negative ecological effects might occur as a result of altering the phosphorus cycle? Include in your explanation how this effect could be measured. Potential impacts on things such as the algal community can be examined based on thermal preference as well as the nitrogen to phosphorus ratio. If there was additional phosphorous from the LSC, it would slightly decrease this ratio and may favor the growth of nitrogen-fixing blue-green algae.

The experiment took place in a laboratory setting, and the first step was obtaining sixty individual Daphnia magna (that were neither adults nor tiny offspring) from a large tank in the lab. These individuals were equally divided into three groups; low density, medium density, and high density. The twenty Daphnia assigned to the low density group were split into four groups of five and pipetted into one of four tubes filled with 10mL of Chlamydomonas algae. The twenty Daphnia assigned to the medium density group were split into two groups of ten and placed into one of two tubes also filled up to 10mL with Chlamydomonas. The final twenty Daphnia were all placed into a single tube filled with 10mL of the algae. In order to avoid suffocation-related

The purpose of this experiment is to understand the effects of nutrient enrichment and eutrophication, using samples of water from Rio Salado and Encanto Park. The samples will contain different concentration levels of nitrogen, phosphorous and nitrogen and phosphorous combined and the impact it has on algae growth. The results recorded showed that the nitrogen concentration levels had a little change, phosphorous levels had a higher change and phosphorous and nitrogen combined had a significantly higher change, resulting in higher algae growth. The results showed that phosphorous indeed is a limiting nutrient in algae growth, but to achieve the highest growth rate, both nitrogen and phosphorous need to be combined.

David played a key role in isolating phosphorus as a major cause of algae overgrowth that led to eutrophication, a process that reduced oxygen in lakes. In 1968, David directed a group of scientists to study this process. During their research, he and the group experimentally manipulated parts of nearly 46 lakes, and from their results, they discovered that when lakes are high in phosphorus, the overgrowth of algae is triggered. The large population of algae then decreases the lakes’ oxygen supply,

Eutrophication, the enrichment of aquatic environments with excess nutrients, is a naturally occurring phenomenon characterized by excessive plant and algae growth. Eutrophication initially increases productivity and limits light penetration, and subsequently results in reduced growth, depleted inorganic carbon, and anoxic “dead zones” (Chislock, Doster, Zitomer, & Wilson, 2013). Historically, primary productivity has been considered limited by an individual nutrient (Gooddy et al., 2016). Schindler (1974) established the highly influential paradigm that phosphorus (P) is generally considered limiting in freshwater environments. However, this has been subject to debate by evidence of freshwater nitrogen (N) limitation, N/P co-limitation, and the role of spatial and temporal variation (Xu, Paerl, Qin, Zhu, & Gao, 2010; Hundey, Moser, Longstaffe, Michelutti, & Hladyniuk, 2014) Cultural eutrophication, resulting from anthropogenic nutrient pollution, and has increased in both frequency and intensity over the past century due to intensification of agriculture, industry and sewage disposal (Schindler, 1974). The causes and consequences of eutrophication are important to study because of the resulting direct and indirect effects on ecosystems alongside societal impacts (Chrislock et al., 2013). Further, the importance of this research should be emphasized in the context of climate change, human population growth and the associated environmental consequences of the 21st century.