Basic Population Concepts
... – density-independent: effect does not vary with population density; e.g., adverse weather – density-dependent: effect varies with population density; e.g., infectious disease ...
... – density-independent: effect does not vary with population density; e.g., adverse weather – density-dependent: effect varies with population density; e.g., infectious disease ...
Ontogeny Recapitulates Phylogeny
... OCCURING. NOTHING IS STATIC. SELECTION OF INDIVIDUALS THAT BEST SUIT THE ENVIRONMENT – NATURAL SELECTION – BIOLOGISTS SPEAK OF MAXIMIZATION. ...
... OCCURING. NOTHING IS STATIC. SELECTION OF INDIVIDUALS THAT BEST SUIT THE ENVIRONMENT – NATURAL SELECTION – BIOLOGISTS SPEAK OF MAXIMIZATION. ...
Notes - Species Interactions
... excludes another species from using the resource • Species coexistence = neither species fully excludes the other from resources, so both live side by side – This produces a stable point of equilibrium, with stable population sizes – Species adjust (change behavior) to minimize competition by using ...
... excludes another species from using the resource • Species coexistence = neither species fully excludes the other from resources, so both live side by side – This produces a stable point of equilibrium, with stable population sizes – Species adjust (change behavior) to minimize competition by using ...
ch. 5 - OCPS TeacherPress
... Evolution: populations change • Evolution: genetic change over time • Charles Darwin: traits favorable to survival would be preserved; frequency of favorable traits increase in subsequent generations • Adaptation: evolutionary modification that improves survival and reproductive success • Natural s ...
... Evolution: populations change • Evolution: genetic change over time • Charles Darwin: traits favorable to survival would be preserved; frequency of favorable traits increase in subsequent generations • Adaptation: evolutionary modification that improves survival and reproductive success • Natural s ...
An Organism`s Niche
... • An ecosystem is all of the organisms living in an area together with their physical environment ...
... • An ecosystem is all of the organisms living in an area together with their physical environment ...
Populations - Mrs. GM Biology 200
... – slightly wider base, width is same, or inverted pyramid – lower #s of pre- & reproductive age – low birth rates • slow growth, zero growth, negative growth (pop. shrinks) ...
... – slightly wider base, width is same, or inverted pyramid – lower #s of pre- & reproductive age – low birth rates • slow growth, zero growth, negative growth (pop. shrinks) ...
Biological diversity in Iceland
... environmental changes and/or stability of selective forces • Recent studies suggest that ecosystem stability relates to: - variation in exactly how organisms respond to environmental fluctuations and how rapidly they respond - weak interspecific competition - food-web architecture; fast and slow ene ...
... environmental changes and/or stability of selective forces • Recent studies suggest that ecosystem stability relates to: - variation in exactly how organisms respond to environmental fluctuations and how rapidly they respond - weak interspecific competition - food-web architecture; fast and slow ene ...
Types of Community Interactions
... of the same or different Competition species attempt to use the same ecological resource in the same place at the same time. ...
... of the same or different Competition species attempt to use the same ecological resource in the same place at the same time. ...
from random mutation to
... Definition: Species X is competitive in a foodweb if the time average of its per-capita growth rate dX/dt/X is positive along the steady state of the web without X. Theorem: A competitive species can always invade the foodweb, but a non-competitive species cannot. With intraspecific competition (m_ ...
... Definition: Species X is competitive in a foodweb if the time average of its per-capita growth rate dX/dt/X is positive along the steady state of the web without X. Theorem: A competitive species can always invade the foodweb, but a non-competitive species cannot. With intraspecific competition (m_ ...
File
... within a defined area at a given time. Population density- the number of individuals per unit area at a given time. Population distribution- how individuals are distributed with respect to one another. ...
... within a defined area at a given time. Population density- the number of individuals per unit area at a given time. Population distribution- how individuals are distributed with respect to one another. ...
Teacher Support Pack Animal Adaptations 2016
... highlight recent changes in habitats. Ask students to brainstorm all the potential issues for animals relating to that change. Adaptation Art – Students dissect pictures of a range of animals to recreate a new species via collage. Creative Presentation – As an alternative to a written report, studen ...
... highlight recent changes in habitats. Ask students to brainstorm all the potential issues for animals relating to that change. Adaptation Art – Students dissect pictures of a range of animals to recreate a new species via collage. Creative Presentation – As an alternative to a written report, studen ...
Community Ecology
... • The ecological niche – Is the total of an organism’s use of the biotic and abiotic resources in its environment ...
... • The ecological niche – Is the total of an organism’s use of the biotic and abiotic resources in its environment ...
Document
... b. The fundamental niche of a species is the full range of physical, chemical, and biological factors it could use if there were no competition. c. The competitive exclusion principle states that no two species with the same fundamental niche can indefinitely occupy the same habitat. d. Interspecifi ...
... b. The fundamental niche of a species is the full range of physical, chemical, and biological factors it could use if there were no competition. c. The competitive exclusion principle states that no two species with the same fundamental niche can indefinitely occupy the same habitat. d. Interspecifi ...
Cornell Notes Template - Ms. Doran`s Biology Class
... environmental circumstances a. When an environmental condition extends beyond an organisms optimum range, it experiences stress b. This means more energy is used for homeostasis, and less for growth/reproduction c. The species’ tolerance determines where its habitat is ...
... environmental circumstances a. When an environmental condition extends beyond an organisms optimum range, it experiences stress b. This means more energy is used for homeostasis, and less for growth/reproduction c. The species’ tolerance determines where its habitat is ...
Unit 5
... Explain why the field of ecology is a multidisciplinary science. Ecology is the scientific study of the interactions between organisms and their environments. It involves using observations and experiments to test hypothetical explanations of ecological phenomena. Examining questions from all areas ...
... Explain why the field of ecology is a multidisciplinary science. Ecology is the scientific study of the interactions between organisms and their environments. It involves using observations and experiments to test hypothetical explanations of ecological phenomena. Examining questions from all areas ...
Factors that make Species Prone to Extinction
... Wild animals and plants which have a value as food, pets, ceremonial objects or marketable products are at risk from humans o E.g. Animals valued as bush meat: monkeys, forest antelope, chimpanzees and gorillas hunted for markets in west and central Africa o E.g. many bird species with elaborate a ...
... Wild animals and plants which have a value as food, pets, ceremonial objects or marketable products are at risk from humans o E.g. Animals valued as bush meat: monkeys, forest antelope, chimpanzees and gorillas hunted for markets in west and central Africa o E.g. many bird species with elaborate a ...
Memory: An organism`s aty bilito stoer retain and recall information
... fungal associations in the roots of land plants, to nutritional microbes living in animal guts, to bacteria that can produce energy from sulfur and allow life to thrive in the deep sea. These relationships are not always amiable, and some mutualisms can shift to parasitism when conditions change. Un ...
... fungal associations in the roots of land plants, to nutritional microbes living in animal guts, to bacteria that can produce energy from sulfur and allow life to thrive in the deep sea. These relationships are not always amiable, and some mutualisms can shift to parasitism when conditions change. Un ...
Ecology
... • Who owns the environment? Adapted from the Nelson Science 10 textbook: “Canadians do not own wild animals or plants just because they live in that environment. We have no right to move them around or to change an ecosystem whenever we feel like it, even if we believe it is for the better good. If ...
... • Who owns the environment? Adapted from the Nelson Science 10 textbook: “Canadians do not own wild animals or plants just because they live in that environment. We have no right to move them around or to change an ecosystem whenever we feel like it, even if we believe it is for the better good. If ...
Instructor`s Copy
... trying to get the same requirement like food or space host – in a parasitic relationship, the host is the organism that “houses” and is harmed by the parasite mutualism – relationship where both organisms benefit parasite – the organism that lives in a host and gets nourishment from the host at the ...
... trying to get the same requirement like food or space host – in a parasitic relationship, the host is the organism that “houses” and is harmed by the parasite mutualism – relationship where both organisms benefit parasite – the organism that lives in a host and gets nourishment from the host at the ...
Midterm 2013 Review
... that live in the same area B. Population is a group of the same species that lives in the same area C. Individual is one organism D. Biosphere is the part of the Earth in which life exists ...
... that live in the same area B. Population is a group of the same species that lives in the same area C. Individual is one organism D. Biosphere is the part of the Earth in which life exists ...
Theoretical ecology
Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world.The field is broad and includes foundations in applied mathematics, computer science, biology, statistical physics, genetics, chemistry, evolution, and conservation biology. Theoretical ecology aims to explain a diverse range of phenomena in the life sciences, such as population growth and dynamics, fisheries, competition, evolutionary theory, epidemiology, animal behavior and group dynamics, food webs, ecosystems, spatial ecology, and the effects of climate change.Theoretical ecology has further benefited from the advent of fast computing power, allowing the analysis and visualization of large-scale computational simulations of ecological phenomena. Importantly, these modern tools provide quantitative predictions about the effects of human induced environmental change on a diverse variety of ecological phenomena, such as: species invasions, climate change, the effect of fishing and hunting on food network stability, and the global carbon cycle.