Swamps are among the most valuable ecosystems on Earth. They act like giant sponges or reservoirs. When heavy rains cause flooding, swamps and other wetlands absorb excess water, moderating the effects of flooding. Swamps also protect coastal areas from storm surges that can wash away fragile coastline.

The swamp ecosystem also acts as a water treatment plant, filtering wastes and purifying water naturally. When excess nitrogen and other chemicals wash into swamps, plants there absorb and use the chemicals. Many of these chemicals come from human activities such as agriculture, where fertilizers use nitrogen and phosphorus. Factories, water treatment plants, and homes also contribute to runoff. Chemicals not absorbed by plants slowly sink to the bottom and are buried in sand and sediment.
For most of history, wetlands were looked upon as wastelands, and as homes for insect pests such as mosquitoes. (Swamps are home to a wide variety of insects, which feed on the wide variety of plants.) People thought swamps were sinister and forbidding.
Skadar Lake is the largest lake at the Balkan Peninsula, with fresh water and one of the largest national parks in Montenegro. It’s extremely famous for its diversity of flora and fauna. Lake itself is unusual for mutual vicinity of different living areas and their chain of feeding. There are many kinds of birds. It is stated that 270 kinds of birds inhabit this Lake. Around 90% of birds are migratory and are of international importance. During migrating season, white little egret, white spoonbill and various kinds of ducks pass over this region. World of plants of this park is very important and is different from the regions where there are often floods, little stone islands and steep mountain cliffs. There are three rare and protected plants and trees and large number (30 +) of rare plants in park.