Aquatic ecology

Environmental parameters Vs Plankton Incidents: The graphs presented in figureX to figureX, environmental parameters observed at different sites in each area are presented area wise along with the harmful plankton incidents observed. Average temperature, dissolved oxygen and salinity observed each day at each farm site is used to plot these graphs. There has been a notion that with drop in salinity, which means freshwater run off, there would be increase in nutrients and supporting higher plankton growth. But, it is not always true. Upwelling events bring up more nutrients where they can be used (surface layers) compared to fresh water runoff. The reason some plankton grow more when there is freshwater runoff is because of the drop in salinity to their ideal growing conditions but not always due to increase in the nutrients load. In later parts of this document, nutrient profile would be compared to the environmental parameters and resulting graphs would be presented. Heterosigma is one species that need to have lower salinities to start blooming. After bloom starts it eventually grows to the carrying capacity of the water body and dies off. The same trend has been observed and recorded when studying the bloom dynamics of Heterosigma over the years. In the graphs presented below figureX and figureX the same trend can be observed. In all the plots it can be seen that not always a bloom starts with drop in salinity due to freshwater runoff. But the opposite was observed in…

Proposal Background Duckweed also know as Lemna by her genus is a small plant, that is mostly found in sub-polar and tropics regions in ditches, ponds, lakes and slow flow-flowing rivers. Duckweed have the main function of remove waste of water, however the main problem is that grows fast (Moss et al.2012). Research Question Is the use of different concentrations of phosphates will affect the duckweed? Hypothesis The more phosphate use the more the plant will be affected. Aim To…

important factor to stream testing is the temperature of the water. If the temperature increases the amount of dissolved oxygen decreases. (EPA and Staff, 2012)Phosphates are present in the water through human and animal wastes. (Oram, no date) Phosphates are used in laundry soaps, cleaners, industrial effluents, and fertilizers. (Oram, no date) Nitrates are used in fertilizers, rodenticides, and food preservatives.Turbidity is caused by sediment or other pollutants and causes the water to…

Thesis: China’s industrial waste practices and fishing methods have led to a negative impact in the world’s aquatic ecosystem. Abstract. Despite China’s major economic and technological advances, the country is being faced with a threatening reality of toxic polluted water that negatively impacts the welfare of both its aquatic life, as well as, the water throughout the world. Through its economic advances, China has also created an overwhelming technique of mass fishing, to feed the global…

2.2.1.1 Temperature, salinity and dissolved oxygen After extensive studies, several authors have mentioned certain physical, chemical and biological parameters of water and sediment as important for the aquaculture of marine shrimps. Along with dissolved oxygen, water temperature and salinity are considered as significant parameters because of their close association in aquatic ecosystem (OSPAR, 2005). The maximum water temperature recommended by Nunes et al., 2005 and ABBC, 2005 was 32°C,…

Another test that was performed was for Dissolved Oxygen, or D.O.. When testing for D.O., measures how much oxygen is in the water that is broken down throughout the water molecules. The fish and other organisms living in the water need dissolved oxygen to survive, except for plants, because plants produce the oxygen in the environment. The dissolved oxygen varies inversely to the temperature of the water. If the dissolved oxygen is low, the water will be too warm and many organisms living in…

Spatial variability in local plankton communities can have large effects on the composition and diversity of the secondary production with in an area. Therefore, it is important for scientists to study the factors that affect plankton community’s abundance, diversity and dominance. In this study multiple physical and biological factors were observed in order to examine how surface plankton communities varied with distance from shore in the nearshore environment of the Southern California Bight.…

Ecological impacts of the pollution on local environment. Eutrophication: Eutrophication is rapid growth of phytoplankton and other aquatic organism in aquatic environment in response to excess addition of nutrients such as nitrogen and phosphorus. Eutrophication can be caused by natural or cultural processes. Natural eutrophication occurs naturally when a lake or stream ages over a century or thousands of years, while cultural eutrophication is anthropogenic in nature. Eutrophication cause in…

Lake Tahoe is located in the Sierra Nevada mountain range in the northeastern part of California, boarding Nevada. It is well known as a tourist attraction for its great depth and clear cobalt blue waters located at high elevation. The combination of its depth, low ratio of watersheds to lake surface area, and its granite rock geology has lead to the creation of a low fertile and high transparent monomictic lake. Its also unique in that it doesn’t fully mix from top to bottom every year, lake…

on streets and sidewalks, and most importantly fertilizer from gardens. Water pollution is caused by animal and human feces, urban runoff, chemical spills, and the over-application of fertilizer. Fertilizer contains phosphorus and once phosphorus comes into contact with water, the health of the entire aquatic ecosystem is affected. An overabundance of phosphorus will create an algae bloom, where a rapid increase in algae population accumulates in the water. Once the algae die, harmful…