{"id":{"repo_id":"u-iceland","oai_identifier":"oai:skemman.is:1946/16720"},"canonical_url":"https://search.dev.ndltd.org/etd/u-iceland/oai:skemman.is:1946/16720","repository":{"repo_id":"u-iceland","name":"University of Iceland","base_url":"https://skemman.is/oai/request"},"display":{"title":"Comparison of two methods for sampling invertebrates on submerged vertical walls with diving","abstract":"Comparisons of methods for sampling submerged vertical areas 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 counting and classifying the zoobenthos encountered in the samples, statistical analysis was conducted. My results show that the manual suction pump system collected a greater number of both individuals and taxa at the two depths in question. It´s use also proved more practical and reliable for the various conditions encountered in the fissure.","abstract_html":"Comparisons of methods for sampling submerged vertical areas 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 counting and classifying the zoobenthos encountered in the samples, statistical analysis was conducted. My results show that the manual suction pump system collected a greater number of both individuals and taxa at the two depths in question. It´s use also proved more practical and reliable for the various conditions encountered in the fissure.","abstract_has_math":false,"creators":["Jóhann Garðar Þorbjörnsson 1988-"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Háskóli Íslands"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2013,"date_issued":"2013-10-07","date_published":"2013-10-07","updated_at":"2026-07-27T21:39:12Z","subjects":["Líffræði","Sýnataka","Silfra"],"languages":["en"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/1946/16720","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Háskóli Íslands"]},{"key":"dc:creator","label":"Author","values":["Jóhann Garðar Þorbjörnsson 1988-"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2013-10-07T09:03:11Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2013-10-07T09:03:11Z"]},{"key":"dc:date.issued","label":"Date","values":["2013-10-07"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Líffræði","Sýnataka","Silfra"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/1946/16720"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Comparisons of methods for sampling submerged vertical areas 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 counting and classifying the zoobenthos encountered in the samples, statistical analysis was conducted. My results show that the manual suction pump system collected a greater number of both individuals and taxa at the two depths in question. It´s use also proved more practical and reliable for the various conditions encountered in the fissure.","Samanburður á aðferðum til sýnatöku með köfun, á lóðréttum neðanvatnssvæðum, var gerður í ferskvatnsgjánni Silfru í Þingallaþjóðgarði, suðvestur Íslandi. Surber sýnataka var umbreytt til notkunar við köfun og hann borinn saman við handvirkt-sogpumpu sýnatökutæki sem smíðað var fyrir verkefnið. Tuttugu sýni voru tekin á lóðréttu sniði í gjánni, á 1 m dýpi og 10 m dýpi. Eftir talningu og flokkun þeirra lífvera sem greindust í sýnum var tölfræðilegur samanburður gerður á fjölda flokkunareininga og einstaklinga sem safnað var með hvoru sýnatökutæki. Niðurstöður sýna að handvirki-sogpumpu sýnatakinn safnaði bæði fleiri einstaklingum og fjölbreyttari fánu lífvera á báðum þeim dýptarsvæðum sem skoðuð voru. Sýnatakinn var einnig hentugri til notkunnar á þeim fjölbreyttu aðstæðum sem gjáin bauð upp á."]},{"key":"dc:title","label":"Title","values":["Comparison of two methods for sampling invertebrates on submerged vertical walls with diving","Samanburður á aðferðum við sýnatöku vatnahryggleysingja á lóðréttum gjáveggjum með köfun"]}]}],"canonical_facts":{"dc:contributor":["Háskóli Íslands"],"dc:creator":["Jóhann Garðar Þorbjörnsson 1988-"],"dc:date.accessioned":["2013-10-07T09:03:11Z"],"dc:date.available":["2013-10-07T09:03:11Z"],"dc:date.issued":["2013-10-07"],"dc:description.abstract":["Comparisons of methods for sampling submerged vertical areas 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 counting and classifying the zoobenthos encountered in the samples, statistical analysis was conducted. My results show that the manual suction pump system collected a greater number of both individuals and taxa at the two depths in question. It´s use also proved more practical and reliable for the various conditions encountered in the fissure.","Samanburður á aðferðum til sýnatöku með köfun, á lóðréttum neðanvatnssvæðum, var gerður í ferskvatnsgjánni Silfru í Þingallaþjóðgarði, suðvestur Íslandi. Surber sýnataka var umbreytt til notkunar við köfun og hann borinn saman við handvirkt-sogpumpu sýnatökutæki sem smíðað var fyrir verkefnið. Tuttugu sýni voru tekin á lóðréttu sniði í gjánni, á 1 m dýpi og 10 m dýpi. Eftir talningu og flokkun þeirra lífvera sem greindust í sýnum var tölfræðilegur samanburður gerður á fjölda flokkunareininga og einstaklinga sem safnað var með hvoru sýnatökutæki. Niðurstöður sýna að handvirki-sogpumpu sýnatakinn safnaði bæði fleiri einstaklingum og fjölbreyttari fánu lífvera á báðum þeim dýptarsvæðum sem skoðuð voru. Sýnatakinn var einnig hentugri til notkunnar á þeim fjölbreyttu aðstæðum sem gjáin bauð upp á."],"dc:identifier.uri":["http://hdl.handle.net/1946/16720"],"dc:language.iso":["en"],"dc:subject":["Líffræði","Sýnataka","Silfra"],"dc:title":["Comparison of two methods for sampling invertebrates on submerged vertical walls with diving","Samanburður á aðferðum við sýnatöku vatnahryggleysingja á lóðréttum gjáveggjum með köfun"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T21:39:12Z"}