Interactions Among Living Things Notes
... characteristic that makes an organism better suited to its environment may eventually become more common in that species. CI: This works because organisms that are best suited tend to live longer and produce ____________________. CI: Adaptations are the ____________________ and ____________________ ...
... characteristic that makes an organism better suited to its environment may eventually become more common in that species. CI: This works because organisms that are best suited tend to live longer and produce ____________________. CI: Adaptations are the ____________________ and ____________________ ...
Populations and Communities
... Population Growth Logistic growth: starts with a small number of individuals and reaches a maximum depending on the carrying capacity of the habitat. When a population is small, the growth rate is fast because there are plenty of resources. As the population approaches the carrying capacity, re ...
... Population Growth Logistic growth: starts with a small number of individuals and reaches a maximum depending on the carrying capacity of the habitat. When a population is small, the growth rate is fast because there are plenty of resources. As the population approaches the carrying capacity, re ...
16 Coevolution-Mutualism 2009
... Two species specialized to perform positive function for each other Trophic: partners complement food/nutrients for each other 1.8 Defensive: species receive food and/or shelter in return for defending against natural enemies 14.11; pg. 298-9, 14.12 Dispersive: animal vectors move pollen or seeds in ...
... Two species specialized to perform positive function for each other Trophic: partners complement food/nutrients for each other 1.8 Defensive: species receive food and/or shelter in return for defending against natural enemies 14.11; pg. 298-9, 14.12 Dispersive: animal vectors move pollen or seeds in ...
Chapter 6 PowerPoint
... Such change can be described by modifying our previous formula to: dN/dt=rN The d is for delta which represents change. Thus the formula would read: “the change in the population (dn) per change in time (dt) is equal to the rate of change (r) times the population size (N).” This is a simple mathemat ...
... Such change can be described by modifying our previous formula to: dN/dt=rN The d is for delta which represents change. Thus the formula would read: “the change in the population (dn) per change in time (dt) is equal to the rate of change (r) times the population size (N).” This is a simple mathemat ...
document
... Aim 8: Invasive alien species are such a widespread problem that it will almost certainly be possible to find a good local example. Such species are a real threat to the biodiversity of the planet, with many species facing extinction as a result. The uniqueness and cultural diversity of human popula ...
... Aim 8: Invasive alien species are such a widespread problem that it will almost certainly be possible to find a good local example. Such species are a real threat to the biodiversity of the planet, with many species facing extinction as a result. The uniqueness and cultural diversity of human popula ...
Evotheory1
... (genetic) within populations. • Sexual Selection- mechanism of evolutionary change for reproduction (mate choice, competition). ...
... (genetic) within populations. • Sexual Selection- mechanism of evolutionary change for reproduction (mate choice, competition). ...
Natural Selection
... In small populations if an individual that carries a particular trait and by chance has more offspring, then the trait or allele can become more common (by chance, not selection) If this happens when a small group of individuals break away from the main group and colonize a new habitat it is cal ...
... In small populations if an individual that carries a particular trait and by chance has more offspring, then the trait or allele can become more common (by chance, not selection) If this happens when a small group of individuals break away from the main group and colonize a new habitat it is cal ...
Chapter 4 - FacStaff Home Page for CBU
... Natural selection is the mechanism by which evolution occurs. It acts on preexisting genetic diversity created by mutations. It favors organisms with certain traits that allow them to survive and reproduce. Mechanism of Natural Selection: ...
... Natural selection is the mechanism by which evolution occurs. It acts on preexisting genetic diversity created by mutations. It favors organisms with certain traits that allow them to survive and reproduce. Mechanism of Natural Selection: ...
Species richness
... Introduction • What is a Community? • A community is defined as an assemblage of species living close enough together for potential interaction. • Communities differ in their species richness, the number of species they contain, and the relative abundance of different species. ...
... Introduction • What is a Community? • A community is defined as an assemblage of species living close enough together for potential interaction. • Communities differ in their species richness, the number of species they contain, and the relative abundance of different species. ...
Final Exam Review - Hicksville Public Schools / Homepage
... due to abiotic factors • fluctuating abiotic factors many niches (desert) • constant abiotic factors=few niches (marsh) ...
... due to abiotic factors • fluctuating abiotic factors many niches (desert) • constant abiotic factors=few niches (marsh) ...
Ecological Relationships
... provides a gain for one species and loss for the other – Different from predation • Prolonged • Does not result in death of the host (usually) ...
... provides a gain for one species and loss for the other – Different from predation • Prolonged • Does not result in death of the host (usually) ...
Bi 101 (Summer 2006) Ecology
... _________________________, has such a strong effect on the species involved that each evolves ways to reduce any overlap in needs In other words, each species specializes within the community, developing its own well-defined, ________________________ ________________________ Adaptations Reduce the O ...
... _________________________, has such a strong effect on the species involved that each evolves ways to reduce any overlap in needs In other words, each species specializes within the community, developing its own well-defined, ________________________ ________________________ Adaptations Reduce the O ...
Mathematical challenges of sustainability Shripad Tuljapurkar
... dynamics. Most human population models that are used in discussions of sustainability have their roots in some form of Malthusian regulation. Perhaps the simplest such model is the logistic. However the logistic and other simple models have little to say about the nature of population regulation, th ...
... dynamics. Most human population models that are used in discussions of sustainability have their roots in some form of Malthusian regulation. Perhaps the simplest such model is the logistic. However the logistic and other simple models have little to say about the nature of population regulation, th ...
Species Interactions: Predation
... Other Keystone Species There are a number of other well-described examples where keystone species act as determinate predators. • Sea otters - regulate sea urchin populations, which in turn feed upon kelp and other macroalgae (Duggins 1980). Otters keep the sea urchin populations in check, allowing ...
... Other Keystone Species There are a number of other well-described examples where keystone species act as determinate predators. • Sea otters - regulate sea urchin populations, which in turn feed upon kelp and other macroalgae (Duggins 1980). Otters keep the sea urchin populations in check, allowing ...
Food Webs
... Here is the ecological story: In competition, the larger Daphnia will outcompete the smaller Daphnia. The salamanders eat the larger Daphnia, allowing the smaller Daphnia to persist. The midge can ONLY eat the smaller Daphnia. Thus, where the salamander larva is present, the midge larva do well… bec ...
... Here is the ecological story: In competition, the larger Daphnia will outcompete the smaller Daphnia. The salamanders eat the larger Daphnia, allowing the smaller Daphnia to persist. The midge can ONLY eat the smaller Daphnia. Thus, where the salamander larva is present, the midge larva do well… bec ...
Ecosystems
... Greek word oikos, for “house,” eco-is the combining form meaning “environment or habitat.” ...
... Greek word oikos, for “house,” eco-is the combining form meaning “environment or habitat.” ...
Chapter 4 Notes
... • Concept 4-4A As environmental conditions change, the balance between formation of new species and extinction of existing ones determines the earth’s biodiversity. • Concept 4-4B Human activities decrease the earth’s biodiversity by causing the premature extinction of species and by destroying or d ...
... • Concept 4-4A As environmental conditions change, the balance between formation of new species and extinction of existing ones determines the earth’s biodiversity. • Concept 4-4B Human activities decrease the earth’s biodiversity by causing the premature extinction of species and by destroying or d ...
Admission Test For Admission to MS Degree in
... You have read research that claims that garlic juice kills bacteria. You decide to do an experiment to see if garlic juice will prevent bacteria from growing on agar gel. You state, 'I think bacteria will not grow on agar gel that has been treated with garlic juice.' This statement is a ...
... You have read research that claims that garlic juice kills bacteria. You decide to do an experiment to see if garlic juice will prevent bacteria from growing on agar gel. You state, 'I think bacteria will not grow on agar gel that has been treated with garlic juice.' This statement is a ...
Bio 20 Checklist: Evolution/Adaptations Test Chapter 4 4.1
... “natural selection___”? Which is the accepted theory at this time? Why? How do you determine the chronological order of fossils found in rock or sediment layers? Why was the Archaeopteryx fossil find so exciting to paleontologists? What did they learn from this fossil? Why is it called a TRANSITIONA ...
... “natural selection___”? Which is the accepted theory at this time? Why? How do you determine the chronological order of fossils found in rock or sediment layers? Why was the Archaeopteryx fossil find so exciting to paleontologists? What did they learn from this fossil? Why is it called a TRANSITIONA ...
Ecology ppt
... 78%-80% of air. Organisms can not use it in that form. Lightning and bacteria convert nitrogen into ...
... 78%-80% of air. Organisms can not use it in that form. Lightning and bacteria convert nitrogen into ...
3.2 How Humans Influence Ecosystems
... By the end of section 3.2 you should be able to understand the following: A sustainable ecosystem is not only good for biodiversity and maintaining future healthy ecosystems, but can also be very good economic opportunities. Currently, ecosystem sustainability is often threatened ...
... By the end of section 3.2 you should be able to understand the following: A sustainable ecosystem is not only good for biodiversity and maintaining future healthy ecosystems, but can also be very good economic opportunities. Currently, ecosystem sustainability is often threatened ...
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.