Crossword of biodiversity of rivers

Crossword

  
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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     4    5     6          
7           8           
                  
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          10          
                  

Across:

1. Shrub or small tree with leaves 5-12 cm, wavy and spiny edges, very glossy and stiff. Its fruit is a small red berry 8-10 mm and it has a great ecological value as food for many species of animals in winter. Due to its colourfulness and branches full of fruit it is often used as a Christmas decoration.
7. Large deciduous tree with leaves 5-18 cm, with 5-7 lobes, and its fruit is called acorn. It’s the most representative Galician tree and it can live up to 1,000 years. It withstands moisture from the river banks and its wood is of high quality being used for furniture, for house building and for making maturing wine and distillation barrels. Being so abundant in Galicia, it has led to name many towns and villages.
8. A big gallinaceous bird that lives in the high mountains in Galicia; the male looks like a turkey and can weigh up to 6 kilograms. It is currently in danger of extinction.
9. Scientific name of the genus of a species of a large bivalve mollusc, which can reach 15 cm, present in Galician rivers in the past, but today it is virtually extinct in Galicia.
10. Tree belonging to the family of Betulaceae with leaves 4-10 cm, almost round and with jagged edges. It holds moisture well, so it is part of the forests along the rivers. It is ecologically important for its anti-erosion action and it forms symbiosis with Frankia alni fungus, which is installed in its roots and sets atmospheric nitrogen.

Down:

2. The largest marine mammal present in the Galician rivers.
3. Scientific name of common hawthorn or single-seeded hawthorn, a small tree used as a pattern in grafting of pear trees and apple trees, besides its cardiotonic and sedative properties.
4. Number of months of the Celtic lunar calendar.
5. Group of unicellular algae used to determine the water quality of rivers. Its body is surrounded by two valves made of silica and one of the valves is slightly larger than the other allowing one valve to fit inside the edge of the other.
6. Scientific name of the genus of a small plant up to 25 cm with strong branched roots from which many branches of linear stiff gross leaves and many pinkish flowers arranged in an inflorescence or a glomerulus emerge. It is found in marshes, brackish areas and coastal cliffs. Tradition says that if a few flowers of this plant are placed near someone who is sleeping, when they wake up they will fall for the first person they see.