Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes.
Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. Studies were carri...
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Umeå universitet, Institutionen för ekologi, miljö och geovetenskap
2020
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ftumeauniv:oai:DiVA.org:umu-173222 2023-10-09T21:43:57+02:00 Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. de la Quintana, Juan Manuel 2020 application/pdf http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173222 eng eng Umeå universitet, Institutionen för ekologi, miljö och geovetenskap http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173222 info:eu-repo/semantics/openAccess Lake zooplankton phytoplankton DOC and DIN:TP Biological Sciences Biologiska vetenskaper Student thesis info:eu-repo/semantics/bachelorThesis text 2020 ftumeauniv 2023-09-22T13:52:54Z Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. Studies were carried out in 33 different lakes throughout Sweden, divided into 4 regions (Abisko, Jämtland, Västerbotten and Värmland) to assess whether differences in environmental characteristics induced differences in phytoplankton abundance and zooplankton communities. Using data from 3 different seasons of the year, I found that zooplankton composition differed between northern and southern regions, and greater differences were found between the mountain regions than between the boreal regions. Dissolved inorganic N (DIN) and dissolved inorganic N to total P ratio (DIN:TP) concentrations were lower in northern regions than in southern regions. Phytoplankton biomass increased with dissolved organic carbon (DOC), likely through the positive effects of DOC on overall nutrient availability. DOC concentrations were higher in boreal regions than in mountain regions, as also happens with chlorophyll-a. Positive correlations between DOC and 3 different zooplankton genera were proven, whereas 3 different zooplankton taxa were correlated with DIN:TP (two negatively and one positively). Lakes with lower DIN:TP ratios had higher abundances of calanoids, which were the major contributor of the dissimilarity in zooplankton composition among the regions. Therefore, the DIN:TP ratio possibly has stronger effects than DOC on zooplankton composition in Swedish oligotrophic lakes. But further increases in DOC concentrations will likely reduce the differences in zooplankton composition caused by the declines in lake DIN:TP observed in this study. Bachelor Thesis Abisko Umeå University: Publications (DiVA) Abisko ENVELOPE(18.829,18.829,68.349,68.349) |
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Open Polar |
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Umeå University: Publications (DiVA) |
op_collection_id |
ftumeauniv |
language |
English |
topic |
Lake zooplankton phytoplankton DOC and DIN:TP Biological Sciences Biologiska vetenskaper |
spellingShingle |
Lake zooplankton phytoplankton DOC and DIN:TP Biological Sciences Biologiska vetenskaper de la Quintana, Juan Manuel Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. |
topic_facet |
Lake zooplankton phytoplankton DOC and DIN:TP Biological Sciences Biologiska vetenskaper |
description |
Zooplankton is crucial for lake ecosystems as it is an important component in most of the food webs of these ecosystems. However, environmental changes have caused reductions in ecosystems nutrients and stoichiometry, which directly affects phytoplankton’s development and quality. Studies were carried out in 33 different lakes throughout Sweden, divided into 4 regions (Abisko, Jämtland, Västerbotten and Värmland) to assess whether differences in environmental characteristics induced differences in phytoplankton abundance and zooplankton communities. Using data from 3 different seasons of the year, I found that zooplankton composition differed between northern and southern regions, and greater differences were found between the mountain regions than between the boreal regions. Dissolved inorganic N (DIN) and dissolved inorganic N to total P ratio (DIN:TP) concentrations were lower in northern regions than in southern regions. Phytoplankton biomass increased with dissolved organic carbon (DOC), likely through the positive effects of DOC on overall nutrient availability. DOC concentrations were higher in boreal regions than in mountain regions, as also happens with chlorophyll-a. Positive correlations between DOC and 3 different zooplankton genera were proven, whereas 3 different zooplankton taxa were correlated with DIN:TP (two negatively and one positively). Lakes with lower DIN:TP ratios had higher abundances of calanoids, which were the major contributor of the dissimilarity in zooplankton composition among the regions. Therefore, the DIN:TP ratio possibly has stronger effects than DOC on zooplankton composition in Swedish oligotrophic lakes. But further increases in DOC concentrations will likely reduce the differences in zooplankton composition caused by the declines in lake DIN:TP observed in this study. |
format |
Bachelor Thesis |
author |
de la Quintana, Juan Manuel |
author_facet |
de la Quintana, Juan Manuel |
author_sort |
de la Quintana, Juan Manuel |
title |
Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. |
title_short |
Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. |
title_full |
Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. |
title_fullStr |
Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. |
title_full_unstemmed |
Spatial patterns of zooplankton communities In Swedish mountain and boreal lakes. |
title_sort |
spatial patterns of zooplankton communities in swedish mountain and boreal lakes. |
publisher |
Umeå universitet, Institutionen för ekologi, miljö och geovetenskap |
publishDate |
2020 |
url |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173222 |
long_lat |
ENVELOPE(18.829,18.829,68.349,68.349) |
geographic |
Abisko |
geographic_facet |
Abisko |
genre |
Abisko |
genre_facet |
Abisko |
op_relation |
http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-173222 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1779321422407008256 |