Ebro delta questionaire essay

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1 . When did the sea level stabilized inside the Mediterranean? How old is definitely the Ebro Delta? • The Mediterranean stabalized 4000 yrs ago

• The Mediterranean is rising at 1 . 5 millimetres per year • The Ebro delta goes back to the end of the previous ice grow older it has constantly changed, together with the 15th to 16th hundreds of years being the periods of greatest growth for the Delta

2 . Which man-induced phenomenon faster sediment accumulated in the Ebro Delta? • Building of Dunes (specifically in 1991)

• Construction of walkways in Dunes to fight against erosion • Removal of system located on the shoreline that stops the normal development of the coastal dynamic • Logging of forests in central The country because it increased erosion?

several. Which impacts have been brought on in the Ebro Delta by construction of a giant number of atteinte in the Ebro river? • Sediment loss and chafing (sea level is anticipated to rise 1 ) 5 millimetres per year as well as the delta is usually sinking as a result of weight in the sediment simply by between 1-8 millimetres a year) • The surface of the delta isn’t steady because it is not growing via sediment, although the shape alterations

4. Sturgeons vanished fro the Ebro delta 4 decades ago and giant fresh water clams are quite endangered. How come? • Sturgeons vanished mainly because dams have disrupted the Sturgeon migration for spawning so that they can’t leave the delta to reproduce • Freshwater clams are highly decreasing in numbers because their particular larvae had been parasites of Sturgeons and stick to these people in order to be transferred upstream wherever they can grow • The only clams are those from prior to the Sturgeon vanishment

5. Various freshwater unique species have been introduced in the Ebro Delta in the past 50 years, but no marine amazing species have been introduced. For what reason? • Persons wanted to enhance the freshwater fauna by introducing freshwater deceptive fish hoping of increasing angling in freshwater Marine environments • The Delta a new higher diversity which means it already had a high business value 6th. The mosquitofish was presented in the Ebro Delta to fight a fatal illness. Which one? • Malaria, it could be stopped simply by killing mosquitoes and dealing with those infected to stop it from dispersing

7. Immersed macrophytes vanished from coastal lagoons in the late 1970s although r recolonized them inside the mid 1990s. Which operations were involved? Which was the effect of those improvements on waterfowl abundance and variety? • Pesticides and chemicals used by farmers along with fertilizers from rice fields ran downstream into marshes • The harmful chemicals increased nitrogen and phosphorus and thus elevated phytoplankton growth which bring about the failure of macrophytes • Deficiency of macrophytes decreased the sweet population because they no longer had a meals source • Fishing decrease was due to overfishing to never macrophyte break • A fair balance between fresh and salt normal water needs to be managed in order to steer clear of eutrophication for the reason that ducks choose fresh water grown macrophytes

almost eight. The Ebro Delta facilitates a large sportfishing fleet. Will certainly fish capture be affected by freshwater translocation southern Spain for irrigation? • Yes, the freshwater is more preferable for vegetation but not to get the above production of phytoplankton

being unfaithful. Rice lifestyle has a dramatic impact on the dynamics with the Ebro Delta. How is vegetation afflicted with rice culture? Which is the effect on the fowl fauna? • Rice Domains need fresh water in the summer throughout the harvest and salt water I the wintertime which is the contrary of most deltas • Vegetation can decrease down stream due to eutrophication from the nutrition from the grain fields. Feeding habits of bird faunas increased with an increase of organic collection of grain • Fresh water flow permits more nutritious rich drinking water which allows for plant and phytoplankton growth

10. The seagrass Posidonia oceanica is usually abundant north to Ebro Delta, although does not exist in the Ebro Delta. Furthermore, it is rare south towards the delta. For what reason? • It takes increased salinity and very clear waters with little nutrients which can only be found upstream of the delta not southern of it or perhaps in this where there is really a lot of freshwaters and nutrition from the rice fields and rivers

10. The seagrass Cymodocea nodosa inhabits the bays from the Ebro Delta, but in some areas it is replaced simply by free-living green seaweeds. How come? • Outside the these types of by the yellow sand is too loose to support the seagrass root base • Inside the bays of the delta the sand is a lot firmer and stays organization for just as much as 10 inches wide

12. Which can be the most relevant threat intended for the preservation of sand dunes? • Due to atteinte, sand dunes aren’t growing yet happen to be being eroded by winds and normal water between the sea and the main landmass • Tourists damage the plants on the ar�te and also contribute to the erosion

13. Why the fish residing in the fardo lagoons of the Ebro Delta have been overexploited? • As a result of over angling and industrial fishing


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