- 1. Which of the following lakes is Lake Ohrid often compared to for its ecological importance?
A) Lake Victoria
B) Crater Lake
C) Lake Baikal
D) Lake Tahoe
- 2. How deep is Lake Ohrid at its maximum depth?
A) 213 meters
B) 451 meters
C) 110 meters
D) 288 meters
- 3. When was the Lake Ohrid region declared a UNESCO World Heritage site?
A) 2011
B) 2004
C) 1995
D) 1979
- 4. Which fish species is endemic to Lake Ohrid?
A) Grouper
B) Bass
C) Ohrid trout
D) Salmon
- 5. What is the primary outflow of Lake Ohrid?
A) Black Drin River
B) Vjosa River
C) Neretva River
D) Vardar River
- 6. Lake Ohrid is known for its high level of what?
A) Biodiversity
B) Temperature
C) Pollution
D) Salinity
- 7. What is the primary source of income for the local population around Lake Ohrid?
A) Tourism
B) Farming
C) Manufacturing
D) Fishing
- 8. What is the name of the nearby Lake that is connected to Lake Ohrid by an underground river?
A) Lake Prespa
B) Lake Geneva
C) Lake Titicaca
D) Lake Biwa
- 9. Which countries does Lake Ohrid straddle?
A) Montenegro and Croatia
B) Bulgaria and Greece
C) Serbia and Kosovo
D) North Macedonia and Albania
- 10. How many endemic species does Lake Ohrid have?
A) More than 200
B) 300
C) 50
D) 100
- 11. Which of the following lakes was named after Lake Ohrid by NASA?
A) Lake Titicaca
B) One of Titan's lakes
C) Lake Baikal
D) The Dead Sea
- 12. What year did Albania's side of Lake Ohrid receive UNESCO World Heritage status?
A) 1979
B) 2019
C) 1980
D) 2014
- 13. Which park in North Macedonia includes a portion of the lakeside of Lake Ohrid?
A) Galičica National Park
B) Skopje City Park
C) Mavrovo National Park
D) Pelister National Park
- 14. What is the length of Lake Ohrid?
A) 40 km
B) 20 km
C) 30.4 km
D) 50 km
- 15. Which town in Albania is situated at the lakeside of Lake Ohrid?
A) Pogradec
B) Tirana
C) Durres
D) Shkodra
- 16. What percentage of Lake Ohrid's shoreline is within North Macedonia?
A) 70%
B) 64%
C) 50%
D) 36%
- 17. Which tectonic event occurred around 6 million years ago affecting the area of Lake Ohrid?
A) Creation of mountain ranges
B) Transition from compressional to extensional tectonics
C) Development of river deltas
D) Formation of volcanic islands
- 18. What is the estimated volume of water in Lake Ohrid?
A) 30 cubic kilometers
B) 45 cubic kilometers
C) 55.49 cubic kilometers
D) 70 cubic kilometers
- 19. What is the hydraulic residence time scale of Lake Ohrid?
A) ~50 years
B) ~100 years
C) ~70 years
D) ~30 years
- 20. Which geological feature is associated with Lake Ohrid's seismogenic landscape?
A) Fresh fault scarps
B) Sand dunes
C) Volcanic craters
D) Glacial valleys
- 21. What percentage of Lake Ohrid's inflow comes from underground springs on the eastern shore?
A) 75%
B) 10%
C) 25%
D) About 50%
- 22. In which direction does the surface water of Lake Ohrid predominantly move?
A) Clockwise
B) Counter-clockwise
C) Northward
D) Southward
- 23. What is the dominant process for vertical water exchange in Lake Ohrid during winter?
A) River inflow
B) Thermal stratification
C) Convective mixing
D) Tidal forces
- 24. Does Lake Ohrid undergo an annual deep water exchange?
A) Only during summer
B) No
C) Yes
D) Only during winter
- 25. Which wetland habitat near Lake Ohrid was drained for agriculture in the 1940s?
A) Ohrid Marsh
B) Struga Marsh
C) Sateska Marsh
D) Studenchishte Marsh
- 26. What is the size of the area recommended to be protected as a Natural Monument at Studenchishte Marsh?
A) 100 hectares
B) 63.97 hectares
C) 50 hectares
D) 75 hectares
- 27. When was Ramsar status formalized for Lake Ohrid and Studenchishte Marsh?
A) 2018
B) 2019
C) 2015
D) 2021
- 28. What is the impact of the European Corridor VIII railway on Struga Marsh?
A) Restoration enhanced
B) No impact
C) Potential restoration reduced
D) Complete restoration achieved
- 29. How many species of phytoplankton and sessile algae are endemic to Lake Ohrid?
A) 10 species
B) 30 species
C) 15 species
D) 20 species
- 30. Name an endemic plant species found in Lake Ohrid.
A) Chara ohridana
B) Potamogeton crispus
C) Elodea canadensis
D) Nymphaea alba
- 31. How many species of zooplankton are endemic to Lake Ohrid?
A) 3 species
B) 5 species
C) 7 species
D) 10 species
- 32. Which species is an example of a cyprinid fish from Lake Ohrid?
A) Pachychilon pictum
B) Cyprinus carpio
C) Barbus barbus
D) Gambusia affinis
- 33. What is the name of one of the endemic trout species in Lake Ohrid?
A) Salvelinus fontinalis
B) Oncorhynchus mykiss
C) Salmo letnica
D) Salmo trutta
- 34. How many species of endemic bottom fauna are found in Lake Ohrid?
A) 100 species
B) 176 species
C) 200 species
D) 150 species
- 35. What percentage of the freshwater gastropod fauna is endemic to Lake Ohrid?
A) 73.5%
B) 60%
C) 80%
D) 50%
- 36. How many species of freshwater snails are recorded from the Lake Ohrid basin?
A) 50 species
B) 75 species
C) 68 species
D) 60 species
- 37. How many introduced fish species are known from Lake Ohrid?
A) Seven
B) Three
C) Ten
D) Five
- 38. What percentage of native fish species in Lake Ohrid are endemic?
A) All
B) A third
C) Two-thirds
D) Half
- 39. Which bird is a rare and threatened species found in the lakeshore reed beds of Lake Ohrid?
A) Sparrowhawk
B) Peregrine falcon
C) Dalmatian pelican
D) Bald eagle
- 40. What designation has BirdLife International given to the Macedonian part of Lake Ohrid?
A) Protected Landscape
B) World Heritage Site
C) Biosphere Reserve
D) Important Bird Area (IBA)
- 41. Which bird species is supported by the Albanian part of Lake Ohrid?
A) Sparrowhawk
B) Common goldeneyes
C) Bald eagle
D) Peregrine falcon
- 42. What is the approximate population living directly at Lake Ohrid's shore?
A) 131,000 people
B) 43,000 people
C) 88,000 people
D) 170,000 people
- 43. By how much has the population in Lake Ohrid's catchment area increased over the last half century?
A) 50,000 people
B) 200,000 people
C) 150,000 people
D) 100,000 people
- 44. During which decade did over 200,000 tourists visit the Macedonian side of Lake Ohrid annually?
A) 1970s
B) 2000s
C) 1990s
D) 1980s
- 45. What historical route was close to Lake Ohrid?
A) The Amber Road
B) The Trans-Siberian Railway
C) The Silk Road
D) The Via Egnatia
- 46. Under which criterion is the Macedonian side of Lake Ohrid recognized as a World Heritage Site?
A) Criterion VII
B) Criterion I
C) Criterion III
D) Criterion IX
- 47. How many recommendations were devised for Macedonia by the 2017 mission report?
A) 30
B) 10
C) 19
D) 25
- 48. What was observed about the implementation of recommendations from the 2017 Reactive Monitoring Mission?
A) All were fully implemented
B) The majority had not been implemented
C) None were considered necessary
D) Only a few were partially implemented
- 49. What is the biggest source of phosphorus pollution currently affecting Lake Ohrid?
A) Industrial waste from factories
B) Household wastewater
C) Natural erosion of lakebed sediments
D) Agricultural runoff from fields
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