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Transcript of Lake Mead
The water once stood at 1,229 feet and has declined more than a hundred feet since it was recorded in early 2000. Water levels have declined due to a multi-year drought and continued growth combining to drain the reservoir. The jagged rocks along the boundaries signify how far the water has fallen from its highest point. A. What is the history of this ecosystem?
Lake Mead was originally established as Boulder Dam Recreation. The name was changed to Hoover Dam in 1964. The lake was named after Elwood Mead, a commissioner at the US Bureau of Reclamation. C. What type of Biome is your ecosystem?
Lake Mead is a fresh water Biome. This
ecosystem is a place of nutrients and
minerals. D. E. F.What are the abiotic/biotic factors in your ecosystem? Some biotic factors are: phytoplankton, zooplankton, shad, and game fish. Some abiotic factors are: the dry weather, depth of the lake, and the light. I. How have humans affected your ecosystem? What type of food chains/webs does
your ecosystem support? Who
are the producers, consumers,
and decomposers in your ecosystem? J. What can be done to change any negative factors facing your
ecosystem? Humans have affected Lake Mead greatly. After all, Lake Mead wouldn't exist without them! Lake Mead is in a severe drought due to humans using it's water. Humans have been polluting Lake Mead with the gas from their motor boats as well. The food chain of Lake Mead supports phytoplankton, zooplankton, juveniles, shad, and game fish. The producers of this ecosystem are the phytoplankton for they use photosynthesis. The consumers are the zoo plankton as they graze on algae and bacteria. The decomposers are the fungi for they decompose animal or plant material after they die. H. What role do
the non-living things
in your ecosystem play? Who are the producers/prey in your ecosystem? Non-living things in Lake
Mead play an important role.
The soil provides important
nutrients and anchors plants.
The sun hits the water, witch allows
algae to grow. The algae produces oxegyn
for fish and food for microscopic
animals. The consequence of removing an
organism from Lake Mead is an
ecosystem collapse. The cause of this
may be pollution, range of resources,
or habitat loss. If an organism is added,
the food chain may fall apart. Razorback sucker populations in Lake Mead are responsible for creating and maintaining the database and monitoring efforts in the system. Razorback suckers also prevent predation. Quaqqa mussels, which may be found all over Lake Mead, are algae feeders. They filter the water daily and consume large portions of microscopic plants and animals that form the base of the food web. Quaqqa mussels are a destructive part of the ecosystem as a removal of phytoplankton is capable of disturbing the ecological balance. G. What are the causes/
consequences of adding
or removing an organism
from the ecosystem? Websites used: The main factor faced by this ecosystem is water
drought. If we are not smart in the ways water
is used, it may take many years for the plagued
areas to recover. science.hme.com/at-record-low-levelsen.wikipedia.org
thefoodweblakeaccess.com Lake Mead Vocabulary Drought - a period of dry weather, especially a long one that is injurious to crops
Algae - any of numerous groups of chlorophyll-containing, mainly aquatic eukaryotic organisms ranging from microscopic single-celled forms to multicellular forms 100 feet (30 meters) or more long, distinguished from plants by the absence of true roots, stems, and leaves and by a lack of nonreproductive cells in the reproductive structures: classified into the six phyla Euglenophyta, Crysophyta, Pyrrophyta, Chlorophyta, Phaeophyta, and Rhodophyta.
Phytoplankton - the aggregate of plants and plantlike organisms in plankton.
Zooplankton - the aggregate of animal or animallike organisms in plankton, as protozoans.