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- https://bio.libretexts.org/Courses/Evergreen_Valley_College/Introduction_to_Ecology_(Kappus)/04%3A_Natural_Selection_and_EvolutionThe Ukrainian-born American geneticist Theodosius Dobzhansky famously wrote that “nothing makes sense in biology except in the light of evolution.” (Dobzhnsky, 1964).He meant that the principle that a...The Ukrainian-born American geneticist Theodosius Dobzhansky famously wrote that “nothing makes sense in biology except in the light of evolution.” (Dobzhnsky, 1964).He meant that the principle that all life has evolved and diversified from a common ancestor is the foundation from which we understand all other questions in biology.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/07%3A_Phylogenies_and_the_History_of_Life/7.04%3A_Perspectives_on_the_Phylogenetic_TreeThe concepts of phylogenetic modeling are constantly changing. It is one of the most dynamic fields of study in all of biology. Over the last several decades, new research has challenged scientists’ i...The concepts of phylogenetic modeling are constantly changing. It is one of the most dynamic fields of study in all of biology. Over the last several decades, new research has challenged scientists’ ideas about how organisms are related. New models of these relationships have been proposed for consideration by the scientific community.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_1%3A_Introduction_to_Ecology/1.2%3A_History_of_EcologyEcology is a new science and considered as an important branch of biological science, having only become prominent during the second half of the 20th century.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/10%3A_Population_modeling/10.04%3A_Overview_of_Population_Growth_ModelsAlthough life histories describe the way many characteristics of a population (such as their age structure) change over time in a general way, population ecologists make use of a variety of methods to...Although life histories describe the way many characteristics of a population (such as their age structure) change over time in a general way, population ecologists make use of a variety of methods to model population dynamics mathematically. These more precise models can then be used to accurately describe changes occurring in a population and better predict future changes.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_10%3A_Population_modeling/10.3%3A_Overview_of_Population_Growth_ModelsAlthough life histories describe the way many characteristics of a population (such as their age structure) change over time in a general way, population ecologists make use of a variety of methods to...Although life histories describe the way many characteristics of a population (such as their age structure) change over time in a general way, population ecologists make use of a variety of methods to model population dynamics mathematically. These more precise models can then be used to accurately describe changes occurring in a population and better predict future changes.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/12%3A_Sex_Strategies/12.07%3A_Sexual_selectionThis chapter explores some of the multitude of hypotheses for why sexual reproduction exists, the variety of ways in which sexes are determined in plants and animals, and some of the variation in mati...This chapter explores some of the multitude of hypotheses for why sexual reproduction exists, the variety of ways in which sexes are determined in plants and animals, and some of the variation in mating systems of sexual organisms. This chapter also focuses on sexual selection, a form of natural selection that occurs when traits that improve mating success are favored by selection, even if they cause a decrease in survival.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_4%3A_Adaptations_to_the_Physical_Environment/4.1%3A_What_is_adaptation[43] If local adaptation is defined simply as a home site advantage of one population (local sources outperform foreign sources at a common site), it can be tested for using common garden experiments,...[43] If local adaptation is defined simply as a home site advantage of one population (local sources outperform foreign sources at a common site), it can be tested for using common garden experiments, where multiple source populations are grown in a common site, as long as one of the source populations is local to that site.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/03%3A_Introduction_to_Evolution/3.02%3A_Understanding_EvolutionEvolution by natural selection describes a mechanism for how species change over time. That species change had been suggested and debated well before Darwin began to explore this idea. The view that s...Evolution by natural selection describes a mechanism for how species change over time. That species change had been suggested and debated well before Darwin began to explore this idea. The view that species were static and unchanging was grounded in the writings of Plato, yet there were also ancient Greeks who expressed evolutionary ideas.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Principles_of_Biology/03%3A_Chapter_3/21%3A_Introduction_to_EvolutionThe Grants found changes from one generation to the next in the distribution of beak shapes with the medium ground finch on the Galápagos island of Daphne Major. Scientists describe groups of organism...The Grants found changes from one generation to the next in the distribution of beak shapes with the medium ground finch on the Galápagos island of Daphne Major. Scientists describe groups of organisms becoming adapted to their environment when a change in the range of genetic variation occurs over time that increases or maintains the “fit” of the population to its environment.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_12%3A_Sex_Strategies/12.5%3A_Sexual_selectionThis chapter explores some of the multitude of hypotheses for why sexual reproduction exists, the variety of ways in which sexes are determined in plants and animals, and some of the variation in mati...This chapter explores some of the multitude of hypotheses for why sexual reproduction exists, the variety of ways in which sexes are determined in plants and animals, and some of the variation in mating systems of sexual organisms. This chapter also focuses on sexual selection, a form of natural selection that occurs when traits that improve mating success are favored by selection, even if they cause a decrease in survival.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/04%3A_Adaptations_to_the_Physical_Environment/4.01%3A_What_is_adaptationAn adaptation is a heritable trait that has evolved through natural selection. Adaptation is closely related to biological fitness, which governs the rate of evolution as measured by change in gene f...An adaptation is a heritable trait that has evolved through natural selection. Adaptation is closely related to biological fitness, which governs the rate of evolution as measured by change in gene frequencies. Often, two or more species co-adapt and co-evolve as they develop adaptations that interlock with those of the other species, such as with flowering plants and pollinating insects.
