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- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/General_Biology_1e_(OpenStax)/1%3A_The_Chemistry_of_Life/1%3A_The_Study_of_Life/1.2%3A_Themes_and_Concepts_of_BiologyFrom its earliest beginnings, biology has wrestled with three questions: What are the shared properties that make something “alive”? And once we know something is alive, how do we find meaningful leve...From its earliest beginnings, biology has wrestled with three questions: What are the shared properties that make something “alive”? And once we know something is alive, how do we find meaningful levels of organization in its structure? And, finally, when faced with the remarkable diversity of life, how do we organize the different kinds of organisms so that we can better understand them? As new organisms are discovered every day, biologists continue to seek answers to these and other questions.
- https://bio.libretexts.org/Bookshelves/Human_Biology/Human_Biology_(Wakim_and_Grewal)/09%3A_Biological_Evolution/9.4%3A_MicroevolutionIndividuals do not evolve because their genes do not change over time. Instead, evolution occurs at the level of the population. A population consists of organisms of the same species that live in the...Individuals do not evolve because their genes do not change over time. Instead, evolution occurs at the level of the population. A population consists of organisms of the same species that live in the same area. In terms of evolution, the population is assumed to be a relatively closed group. This means that most mating takes place within the population. Evolutionary change that occurs over relatively short periods of time within populations is called microevolution.
- https://bio.libretexts.org/Courses/Skyline_College/BIOL_130%3A_Human_Biology/04%3A_Biological_Evolution/4.04%3A_MicroevolutionIndividuals do not evolve because their genes do not change over time. Instead, evolution occurs at the level of the population. A population consists of organisms of the same species that live in the...Individuals do not evolve because their genes do not change over time. Instead, evolution occurs at the level of the population. A population consists of organisms of the same species that live in the same area. In terms of evolution, the population is assumed to be a relatively closed group. This means that most mating takes place within the population. Evolutionary change that occurs over relatively short periods of time within populations is called microevolution.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/4.2%3A_Population_Ecology/4.2.01%3A_The_Scope_of_EcologyEcology is the study of the interactions of living organisms with their environment. One core goal of ecology is to understand the distribution and abundance of living things in the physical environme...Ecology is the study of the interactions of living organisms with their environment. One core goal of ecology is to understand the distribution and abundance of living things in the physical environment. Attainment of this goal requires the integration of scientific disciplines inside and outside of biology, such as biochemistry, physiology, evolution, biodiversity, molecular biology, geology, and climatology.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_14%3A_Introduction_to_Community_EcologyFigure 9: Foundational species increase food web complexity by facilitating species higher in the food chain. (A) Seven ecosystems with foundation species were sampled: coastal (seagrass, blue mussel,...Figure 9: Foundational species increase food web complexity by facilitating species higher in the food chain. (A) Seven ecosystems with foundation species were sampled: coastal (seagrass, blue mussel, cordgrass), freshwater (watermilfoil, water-starwort) and terrestrial (Spanish moss, marram grass). (B) Food webs were constructed for both bare and foundation species-dominated replicate areas. (C) From each foundation species structured-food web, nodes (species) were randomly removed until the s…
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/17%3A_Ecology/17.03%3A_The_Growth_of_Populations/17.3B%3A_Principles_of_Population_GrowthThis page examines how population growth is affected by density-independent factors like natural disasters and density-dependent factors such as competition and resource availability. It describes the...This page examines how population growth is affected by density-independent factors like natural disasters and density-dependent factors such as competition and resource availability. It describes the importance of breeding territories, the predator-prey dynamics, the effects of parasitism, and the concept of carrying capacity influencing population stabilization.
- https://bio.libretexts.org/Courses/Monterey_Peninsula_College/Raskoff_Environmental_Science/05%3A_Biodiversity_and_Conservation/5.05%3A_Population_DiversityA population is a group of individuals of the same species that share aspects of their genetics or demography more closely with each other than with other groups of individuals of that species (where ...A population is a group of individuals of the same species that share aspects of their genetics or demography more closely with each other than with other groups of individuals of that species (where demography is the statistical characteristic of the population such as size, density, birth and death rates, distribution, and movement of migration). Population diversity may be measured in terms of the variation in genetic and morphological features that define the different populations.
- https://bio.libretexts.org/Courses/Gettysburg_College/01%3A_Ecology_for_All/01%3A_Introduction_to_Ecology/1.02%3A_What_is_EcologyEcologists study the interactions of organisms with their environment. A core goal of ecology is to understand the distribution and abundance of organisms in the environment. This requires integrating...Ecologists study the interactions of organisms with their environment. A core goal of ecology is to understand the distribution and abundance of organisms in the environment. This requires integrating many scientific disciplines, such as biochemistry, physiology, evolution, biodiversity, molecular biology, geology, and climatology. Some ecological research also applies aspects of chemistry and physics, and it and it frequently uses mathematical models.
- https://bio.libretexts.org/Workbench/General_Ecology_Ecology/Chapter_1%3A_Introduction_to_Ecology/1.1%3A_What_is_EcologyEcology is the study of the interactions of living organisms with their environment. One core goal of ecology is to understand the distribution and abundance of living things in the physical environme...Ecology is the study of the interactions of living organisms with their environment. One core goal of ecology is to understand the distribution and abundance of living things in the physical environment. Attainment of this goal requires the integration of scientific disciplines inside and outside of biology, such as biochemistry, physiology, evolution, biodiversity, molecular biology, geology, and climatology. It frequently uses mathematical models.
- https://bio.libretexts.org/Courses/University_of_Vermont/UVM_Environmental_Science/02%3A_Biosphere/2.13%3A_Population_Ecologya) Growth in a Florida Snail Kite (Rostrhamus sociabilis) population from s to s (Sykes ); b) Decline of the Gallatin, Montana herd of elk (Cervus canadensis) from the s to s (Peek et al. ); c) Stabil...a) Growth in a Florida Snail Kite (Rostrhamus sociabilis) population from s to s (Sykes ); b) Decline of the Gallatin, Montana herd of elk (Cervus canadensis) from the s to s (Peek et al. ); c) Stability of the Isle Royale, Michigan pack of wolves (Canis lupus) in the s and s (Peterson et al. ); d) Recovery after population crashes in the Lake Manyara National Park, Tanzania herd of impala (Prins and Weyerhaeuser ).
- https://bio.libretexts.org/Courses/Reedley_College/Biology_for_Science_Majors_I/01%3A_The_Study_of_Life/1.03%3A_Themes_and_Concepts_of_BiologyFrom its earliest beginnings, biology has wrestled with three questions: What are the shared properties that make something “alive”? And once we know something is alive, how do we find meaningful leve...From its earliest beginnings, biology has wrestled with three questions: What are the shared properties that make something “alive”? And once we know something is alive, how do we find meaningful levels of organization in its structure? And, finally, when faced with the remarkable diversity of life, how do we organize the different kinds of organisms so that we can better understand them? As new organisms are discovered every day, biologists continue to seek answers to these and other questions.
