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