Evolution and Climate Change in the Oceans
Effects of Temperature on Eelpouts
Thermal limitations for aquatic species largely are due to limitations in blood flow and oxygen levels. This study looked at the common eelpout. They live in very cold seas and show higher mortality rates in unusually hot summers and lab settings. Increased temperatures both increase the eelpouts need for oxygen and reduces the oxygen’s solubility in water. The larger individuals are more prone to dying in warm conditions than smaller fish. The results showed that the amount of time exposed to higher temperatures was an important factor to the survivability of the fish. Another factor is that other fish will be likewise affected, and the changes in food sources could also affect the survivability of eelpouts (Portner et al 2007)
Effects of Decreasing Temperatures
Many of the studies on the effects of global climate change on biodiversity have been focused on a steady increase of global temperatures. However, it is well known that temperatures often fluctuate. The increase in temperatures has led to some invasive marine species in the Caribbean to expand poleward. Despite having a greater thermal range then the native species, when cold spells occur they can cause a reset of the environment by killing the invading Caribbean species. It is important to not only focus on temperature increases but also decreases when looking at the effects of climate change on marine populations.
Effects of Temperature Changes in Low Connectivity Areas
Effects of Temperature Changes in Low Connectivity Areas
A study by Hiddink and Coleby found that temperature increases caused a greater species richness in poleward latitudes. However, despite their hypothesis, areas of low connectivity, such as the Baltic Sea, also show this increase even though it is more difficult for the species to move. This led them to believe the new richness in species may be due to salinity changes and researchers need to pay closer attention to areas of low connectivity when making climate change models.
Effects of Temperature During the Winter
Effects of Temperature During the Winter
A study by Figueira and Booth looked at the effects of temperature increases on various marine species during the winter time. In the past these marine species have been forced to stay in certain areas because the water temperature gets too cold for them to survive in southern areas. However, the stead increase of sea temperature, that is suspected to continue over time, has allowed greater thermal expansion during the winter time. It is expected that the majority of these marine species will be able to survive throughout the winter in even the most southern areas. Further studies need to be conducted onto how this southern migration will effect the native species living in these areas.
Back to Introduction
Back to Introduction
/groups/evolution3000/search/index.rss?sort=modifiedDate&sortDirection=reverse&tag=adaptationlist/groups/evolution3000/search/?sort=modifiedDate&sortDirection=reverse&tag=adaptationAdaptationCustomTagSidebarCustomTagSidebar?sort=modifiedDate&sortDirection=reverse&tag=adaptation0/groups/evolution3000/sidebar/CustomTagSidebarmodifiedDate5CustomTagSidebarreverseadaptationAdaptationcustom/groups/evolution3000/search/index.rss?tag=hotlist/groups/evolution3000/search/?tag=hotWhat’s HotHotListHot!?tag=hot1/groups/evolution3000/sidebar/HotListdheubel5dheubel52012-11-14 16:36:03+00:002012-11-14 16:36:03updated5dheubel5dheubel52012-11-09 16:46:53+00:002012-11-09 16:46:53updated4Added tag - hotdheubel5dheubel52012-11-09 16:46:49+00:002012-11-09 16:46:49addTag3I thought this might be helpful in reading through everything. Let me know if you guys like it!dheubel5dheubel52012-11-09 16:46:24+00:002012-11-09 16:46:24updated2First createddheubel5dheubel52012-11-09 16:31:49+00:002012-11-09 16:31:49created1wiki2012-11-14T16:36:03+00:00groups/evolution3000/wiki/de98eFalseTable of Contents/groups/evolution3000/wiki/de98e/Table_of_Contents.htmldheubel55 updatesTable of Contents
Climate Change
Effects of Climate Change in the Environment
Oxygen Levels
Effects o...Falsedheubel52012-11-14T16:36:03+00:00hot/groups/evolution3000/search/index.rss?sort=modifiedDate&kind=all&sortDirection=reverse&excludePages=wiki/welcomelist/groups/evolution3000/search/?sort=modifiedDate&kind=all&sortDirection=reverse&excludePages=wiki/welcomeRecent ChangesRecentChangesListUpdates?sort=modifiedDate&kind=all&sortDirection=reverse&excludePages=wiki/welcome0/groups/evolution3000/sidebar/RecentChangesListmodifiedDateallRecent ChangesRecentChangesListUpdateswiki/welcomeNo recent changes.reverse5search
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