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Delaware Water Gap National Recreation Park

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Caterina Cattaneo

on 4 June 2013

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Transcript of Delaware Water Gap National Recreation Park

Delaware Water Gap National Recreation Area Let's Do the Food Web Again Human Impacts Continued from Previous Slide Human Impacts Producer Abiotic Factors Though summers are warm, winters are snowy and cold.
Because of the cold winters, the usually smooth and swift-flowing Water Gap freezes over, and the river is covered in ice. With freezing waters, animals such as the mallard duck that feed off of organisms in the water have to either find another food source or migrate for the winter.
The annual amount of precipitation (for every two months) ranges from 4cms to 11cms. The water level in the Gap can become 7.5 meters deep due to floods caused by high levels of precipitations during rainstorms. The Water Gap is a freshwater ecosystem in the forestry of Delaware, bordering New Jersey and Pennsylvania. The Water Gap is a recreation area supporting boating, fishing, canoeing, and swimming. The average temperature ranges from -1 degrees Celsius (in the winter) to 23 degrees Celsius (in the summer). Delaware Water Gap National Recreation Area Even with the massive clean up, the river bottom still had pollutants in it. Animals such as fish would feed off of organisms already contaminated with those pollutants. Then those pollutants would infect the fish and the fishes' predators.
By reducing the discharges from sewage plants, chemical plants, and other factories, the human impact of the pollution on the Delaware Water Gap will be less damaging. Pollution is one conflict the river is battling. Raw sewage was dumped into the river by early settlers. Tsuga Canadensis Eastern Hemlock Period 6, June 3rd, 2013 Caterina Cattaneo, Claire Meyer, Devon Player, Kaya Furulie Eagle Common Map Turtle Northern Water Shrew Aquatic Snail Slimy Salamander Brook Trout Mallard Duck American Beaver Mayfly Narrow-Leaf Cattail Flame Azalea Producers
Primary Consumer
Secondary Consumer
Tertiary Consumer
Decomposer Blue-Green Algae Bacteria Thousands of deaths occurred each year due to diseases brought on by the pollution. Along with the sewage, industrialization and chemical waste, contributed to the pollution of the river. In the 1940's, the pollution of the lake finally reached a point in which it was so polluted that it was unfit for even fish to live in. In 1972, the Delaware River Basin Commission was given $1,000,000,000 (one billion dollars) in federal grants. They used this money to clean up the pollution that had been destroying the Delaware Water Gap for years. Continued on next slide. Individual Reports The Eastern Hemlock tree ranges from Southern Ontario, south to northern Alabama, and west to eastern Minnesota. The Eastern Hemlock tree produces food through photosynthesis. The Eastern Hemlock is eaten by squirrels, birds, deer, and beavers. Once upon a time, it was also consumed by Native Americans and early settlers through soups, bread, and tea. Continued on next slide Producer Eastern Hemlock continued Individual Reports The Eastern Hemlock provides shade and cover for white-tailed deer, wild turkeys, ruffed grouse, and other animals. The abiotic needs of the Eastern Hemlock include certain water, light, and temperature levels. The Eastern Hemlock's bark is an important source for a substance used in tanning leather, but the wood is not used as a lumber source due to its fragility. by. Caterina Cattaneo Individual Reports Individual Report
Common Map Turtle The Common Map Turtle is part of the geograhica species, and of the Graptemys genus. Native to the Delaware Water Gap, the turtle lives near slow rivers, ponds with muddy bottoms, and areas with a strong amount of aquatic vegetation.
The human impact on this population is that with high levels of pollution and acid rain, sometimes the water gap is a challenging place to live in. Since there is still pollution in the bottom of the lake, even after a massive cleanup, and the turtle's prey eats off of plants down there, there is a chance that its food has been contaminated. continued on next slide Individual Report
Common Map Turtle continued These turtles are secondary consumers, which means that they feed off of animals such as freshwater mussels, snails, insects, crayfish, small amphibians, and more. Animals such as minks and bears are the Common Map Turtle's predators.
The male turtles are normally larger than the female map turtles by an average of a couple inches. The females lay one or two clutches of 12-14 ellipsoid eggs a year.
This population enjoys having a rock or log next to the Water Gap because they enjoy basking in the sun on one of these natural formations. Tertiary consumer Haliaeetus Leucocephalus Bald eagle Individual report by Claire Meyer The Aquatic Snail lives near the bottom of freshwater streams and ponds in the Delaware Water Gap. Its only real source of shelter or protection is its shell made of calcium carbonate. The snail's genus is Planorbis (no species).
Though it is mostly considered a primary consumer, eating the algae and aquatic plants found at the river's surface, the aquatic snail will also eat decaying organic matter (Detritus) left behind by fish. In that sense it should also be considered a decomposer.
Large fish, birds, shrews, and turtles feed off of the aquatic snail. As I stated before, if the snail feels unsafe or vulnerable, it will retract its head into its shell and will then cover the opening with an operculum (an organ or part that acts as a lid). The operculum also helps to keep moisture with the snail when it is out of the water. The Aquatic Snail can survive for a little on land , but it needs the abiotic factor of water to live, otherwise it can become dehydrated and die. Being the snail's only source of protection, it is important that the shell is strong When there is not enough calcium in the environment the snail's shell can become weak.
One example of human impact on the Aquatic Snail's population, is when they are used in home aquariums. Because the eat algae and detritus, Aquatic snails are taken out of their ecosystem and are then put into our aquariums to reduce the amount of algae and detritus in them. If too many snails are extracted from their ecosystem, the Aquatic Snail population in that area could suffer. By: Devon Player The End The bald eagle is a pretator in its ecosystem. It does not have any pretators, eccept for may be humans. Its pray is fish, waterfowl, and other small animals in its habitat. The bald eagle nests on the tops of trees or rock rinicles near bodies of water.
At one point the bald eagles population was very low and close to extinction. This was due to pesticides and hunting. in 1940, Bald eagles were protected and still are today. It has become illegal to hunt bald eagles. Now their population has increased from the time. by Kaya Furulie Primary Consumer
Aquatic Snail (continued) Primary Consumer
Aquatic Snail
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