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- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/20%3A_Biogeochemical_Cycles/20.04%3A__The_Nitrogen_CycleHuman activity can release nitrogen into the environment by two primary means: the combustion of fossil fuels, which releases different nitrogen oxides, and by the use of artificial fertilizers (which...Human activity can release nitrogen into the environment by two primary means: the combustion of fossil fuels, which releases different nitrogen oxides, and by the use of artificial fertilizers (which contain nitrogen and phosphorus compounds) in agriculture, which are then washed into lakes, streams, and rivers by surface runoff.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/07%3A_Phylogenies_and_the_History_of_Life/7.03%3A_Determining_Evolutionary_RelationshipsScientists must collect accurate information that allows them to make evolutionary connections among organisms. Similar to detective work, scientists must use evidence to uncover the facts. In the cas...Scientists must collect accurate information that allows them to make evolutionary connections among organisms. Similar to detective work, scientists must use evidence to uncover the facts. In the case of phylogeny, evolutionary investigations focus on two types of evidence: morphologic (form and function) and genetic.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_17%3A_Symbioses/17.4%3A_Maintenance_of_MutualismsThis reduces fitness for both the plant and the moth that laid the egg, and is a form of sanctioning by the plant. This graph was simulated from the real values found by Pellmyr and Huth in their grou...This reduces fitness for both the plant and the moth that laid the egg, and is a form of sanctioning by the plant. This graph was simulated from the real values found by Pellmyr and Huth in their groundbreaking 1994 paper, which showed that mutualisms are not always strictly collaborative, but can involve tension between opposing forces (the plant needs pollination, but doesn't 'want' seeds eaten, the moth needs to lay as many eggs as it can) held in check by natural selection.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/17%3A_Mutualism_and_Commensalism/17.04%3A_Maintenance_of_MutualismsThis reduces fitness for both the plant and the moth that laid the egg, and is a form of sanctioning by the plant. This graph was simulated from the real values found by Pellmyr and Huth in their grou...This reduces fitness for both the plant and the moth that laid the egg, and is a form of sanctioning by the plant. This graph was simulated from the real values found by Pellmyr and Huth in their groundbreaking 1994 paper, which showed that mutualisms are not always strictly collaborative, but can involve tension between opposing forces (the plant needs pollination, but doesn't 'want' seeds eaten, the moth needs to lay as many eggs as it can) held in check by natural selection.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/04%3A_Adaptations_to_the_Physical_Environment/4.03%3A_Adaptations_to_avoid_harsh_conditionsThe content for this subtopic is found in two external pages. Please click the links below to access this information. Extreme Cold Hardiness in Ectotherms Costanzo, J. P. (2011) Extreme Cold Hardines...The content for this subtopic is found in two external pages. Please click the links below to access this information. Extreme Cold Hardiness in Ectotherms Costanzo, J. P. (2011) Extreme Cold Hardiness in Ectotherms. Nature Education Knowledge 3(10):3 Plant-Soil Interactions: Nutrient Uptake Morgan, J. B. & Connolly, E. L. (2013) Plant-Soil Interactions: Nutrient Uptake. Nature Education Knowledge 4(8):2
