Friday, 2 March 2018

our ecosystem

            WETLAND   

Image result for wetlandWetland includes swamps, bogs and marshes. Wetland plants are adapted to living in water-soaked soil. Bulrushes, water lilies and mangroves are just some of the common wetland species.

* HOW ARE WETLANDS DAMAGED?
Tourist resort on a very fertile swamp. Fethiyé, Turkey  rel=


When soil is drained,or too much water is pumped from the land nearby,wetland suffer as the water-table is lowered. They are also easily damaged by pollution: chemical released from factories find their way into streams,upsetting the natural balance.
Image result for shallow water plant grow
* WHY DO MOST WATER PLANTS GROW ONLY IN SHALLOW WATER ? 

Most plants need to root themselves in the soil, even if they live mainly submerged in the water. In deep water there is not enough sunlight for plants to grow successfully. 

* WHAT IS THE WATER HYACINTH ?
Image result for water hyacinth
Water hyacinth is a floating plant with beautiful mauve flowers. However,it is also a fast-growing weed and can spread rapidly to choke waterways.

* HOW DO WATER PLANTS GET THEIR      FLOWERS POLLINATED ?
                                                                                                             
Image result for plant pollination

Most water plants hold their flowers above the water,for pollination by the wind or by insects. Some,like the water starwort,have water-resistant floating pollen that drifts to the female flowers.

* WHAT FOOD PLANTS COME FROM        WETLANDS ?

The most important wetlands crops is rich, which is grown in many parts of the world, notably India and China. It grows best in flooded fields called paddies. Another aquatic grass crops is Canadian wild rice, a traditional food of Native Americans,and now a popular speciality.


* HOW DO WATER PLANTS STAY          AFLOAT ?
               

Image result for shallow water plant growSome water plants stay afloat because their tissues contain chamber of air,making their stems and leaves buoyant. Others,such as water lilies,have flat,rounded leaves that sit boat-like on the water's surface. They may also have waxy leaves, which repel the water and help to keep the leaves afloat,or up-curved rims to the leaves