Global ETD Search
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Showing 1 to 4 of 4 for “"Silfra"”.
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Silfra í þjóðgarðinum á Þingvöllum: Stjórnun takmarkaðrar auðlindar
Í þjóðgarðinum á Þingvöllum er leyfilegt að kafa í tveimur gjám, Davíðsgjá og Silfru. Köfun í þeirri síðarnefndu nýtur mikilla vinsælda og hefur gert það í að minnsta kosti 20 ár. Mikið álag er á gjánni og umhverfi hennar og hefur hvort tveggja látið á sjá. Árið 2013 voru tekin upp gestagjöld sem …
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Impacts of SCUBA divers in the Silfra groundwater fissure : ecological disturbance and management
… ecosystems in areas that tourists visit. The Silfra groundwater fissure in the Thingvellir National Park has seen a rapid increase in the number of entrees, receiving just below 20.000 divers and snorkelers in 2014. This interdisciplinary thesis explored the relationship between the growing …
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Comparison of two methods for sampling invertebrates on submerged vertical walls with diving
… and bottoms while scuba diving were made in Silfra, a freshwater fissure in Þingvellir National Park, southwest Iceland. A modified Surber sampler and a constructed manual suction pump sampling system were used to take 20 samples at two depths at a chosen transect in the fissure. After …
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Biological diversity in Icelandic groundwater fissures
… assemblages were studied in three fissures: Silfra and Flosagjá in SW Iceland and Stekkjagjá in NE Iceland. All samples and measurements were acquired by scuba diving. Invertebrate assemblages in fissures varied significantly between geographical regions in regards to taxa richness, density …