Ponds+and+Lakes

= ﻿ Ponds and Lakes = =** Plants generally grow around the edges of the pond, and often right across the whole pond. A lake is bigger than a pond, sometimes thousands of square metres. Plants only grow along the shoreline because the water is too deep away from the edges. They can be found all around the world. ** = = In summer, the temperature of the water in a lake is not the same: the top part of the water gets more of the sun's heat and is warm (about 19-25ºC), the middle layer is cooler because it gets less of the sunlight (about 8-19ºC), and the bottom layer, which does not get any sunlight, is quite cold (about 4 C). When there is too much algae, the decaying algae reduce the oxygen levels in the water, and this can kill plants and animals. This is called 'summer-kill'.The ice blocks out the sunlight, and oxygen levels in the water drop, killing some plants and animals. This is called 'winter-kill'.The animals and plants of the freshwater biome are different in each country.A pond is a shallow hole where water collects. = It is amazing how many diffrent plant and animals are part of the aquatic ecosystem.A pond is a shallow hole where water collects. Plants generally grow around the edges of the pond, and often right across the whole pond. The bottoms is generally covered with mud.A pond is usually too small to have waves. In places where winters are very cold, the whole pond can freeze solid. Some ponds are seasonal! There are endangered species even in the ponds and lakes biome. These species are bitterling, bullfrog, common carp, great crested grebe , great white pelican, green and gold bell frog, lake trout, largemouth bass, platypus and rough-skinned newt. There are also endangered plants like slimy scum, algea, mosses, water lilies, duckweed, cattails, reeds, mangroves, pickleweed and the hard-stemmed bulush.

Sources: http://www.mbgnet.net/ [] [] =Destiny Quest []



** Blue-green algae are the slimy stuff. Its cells lack nuclei and its pigment is scattered. Blue-green algae are not actually algae, they are bacteria. ** || ** Green algae cells have nuclei and the pigment is distinct. Green algae are the most common algae in ponds and can be multicellular. ** || ** Euglenoids are green or brown and swim with their flagellum, too. They are easy to spot because of their red eye. Euglenoids are microscopic and single celled. ** || ** Dinoflagellates have a flagella and can swim in open waters. They are microscopic and single celled. ** || ** Diatoms look like two shells that fit together. They are microscopic and single celled ** ||
 * ** Major Algae Groups ** ||
 * [[image:http://www.mbgnet.net/fresh/lakes/occil.jpg height="41" align="center"]]
 * [[image:http://www.mbgnet.net/fresh/lakes/spiro.jpg height="45" align="center"]]
 * [[image:http://www.mbgnet.net/fresh/lakes/euglena.jpg height="140" align="center"]]
 * [[image:http://www.mbgnet.net/fresh/lakes/cerat.jpg height="84" align="center"]]
 * [[image:http://www.mbgnet.net/fresh/lakes/nav.jpg height="49" align="center"]]

YAĞMUR ERCAN 90 EREN CEYHAN 92 ANDREW CARL SERRA 98 İSTEM TÜRKARSLAN 134 KAAN HEPYALÇIN 99

7/A 26/01/2011