wfsc420 lesson04
... Selective pressure determines which organisms survive and reproduce and which are eliminated. ...
... Selective pressure determines which organisms survive and reproduce and which are eliminated. ...
Scientific Method For centuries, people based their beliefs on their
... Water and nutrients move back and forth between biotic and abiotic realms. Carbon, nitrogen, sulfur, phosphate, water all have complex biochemical cycles. All the elements we will ever possess are on the earth now. The question is, where are they? ...
... Water and nutrients move back and forth between biotic and abiotic realms. Carbon, nitrogen, sulfur, phosphate, water all have complex biochemical cycles. All the elements we will ever possess are on the earth now. The question is, where are they? ...
Speciation affects ecosystems, Nature, 458
... data from work with predatory stickleback fish that show that it does. This insight comes at an opportune moment, as ecosystems ecology and evolutionary biology have existed separately for more than a century, and their integration is long overdue. Evolutionary biology is all about the dynamics that ...
... data from work with predatory stickleback fish that show that it does. This insight comes at an opportune moment, as ecosystems ecology and evolutionary biology have existed separately for more than a century, and their integration is long overdue. Evolutionary biology is all about the dynamics that ...
Living things need energy
... Animals that eat other animals are carnivores The red fox, coyote, gray fox, bobcat, Little Brown Bat Are examples of carnivores that can be found in CT. Fun fact, the Venus Flytrap plant is BOTH a producer and a consumer. It can convert energy from the sun through photosynthesis and from eating ins ...
... Animals that eat other animals are carnivores The red fox, coyote, gray fox, bobcat, Little Brown Bat Are examples of carnivores that can be found in CT. Fun fact, the Venus Flytrap plant is BOTH a producer and a consumer. It can convert energy from the sun through photosynthesis and from eating ins ...
13.1 Ecologists Study Relationships
... 13.1 Ecologists Study Relationships Changing one factor in an ecosystem can affect many other factors. • Biodiversity is the assortment, or variety, of living things in an ecosystem. • Rain forests have more biodiversity than other locations in the world, but are threatened by human activities. – 7 ...
... 13.1 Ecologists Study Relationships Changing one factor in an ecosystem can affect many other factors. • Biodiversity is the assortment, or variety, of living things in an ecosystem. • Rain forests have more biodiversity than other locations in the world, but are threatened by human activities. – 7 ...
Lecture 06 Ecosystem Productivity and Nutrient Cycling
... • Moves between organisms and atmosphere as a consequence of photosynthesis and respiration. – In aquatic ecosystems, CO2 must first dissolve into water before being used by primary producers. – Although some C cycles rapidly, some remains sequestered in unavailable forms for long periods of time. ...
... • Moves between organisms and atmosphere as a consequence of photosynthesis and respiration. – In aquatic ecosystems, CO2 must first dissolve into water before being used by primary producers. – Although some C cycles rapidly, some remains sequestered in unavailable forms for long periods of time. ...
Document
... Due to fire suppression and fuels buildups, atypical catastrophic fires now occur on the east-side…. Timber harvesting is one way to reduce fuel loads in east-side stands to less damaging levels. ...
... Due to fire suppression and fuels buildups, atypical catastrophic fires now occur on the east-side…. Timber harvesting is one way to reduce fuel loads in east-side stands to less damaging levels. ...
Chapter 3 - Houston ISD
... a single organism of a species Population groups of individuals that belong to same species & live in same area Community groups of different populations living together in defined area. Ecosystem collection ...
... a single organism of a species Population groups of individuals that belong to same species & live in same area Community groups of different populations living together in defined area. Ecosystem collection ...
Biotic interactions
... Uniqueness of soil as an habitat/ecosystem Eating in the soil Detritivores are often obliged to eat both organic matter and mineral material : eat the soil altogether Eating organic matter transforms the organic matter ...
... Uniqueness of soil as an habitat/ecosystem Eating in the soil Detritivores are often obliged to eat both organic matter and mineral material : eat the soil altogether Eating organic matter transforms the organic matter ...
VCE Biology Unit 2
... Changes are continually occurring within ecosystems without any human intervention. The natural replacement over time of one community by another community with different dominant species is termed natural succession. There are two kinds of succession: • Primary succession Different communities beco ...
... Changes are continually occurring within ecosystems without any human intervention. The natural replacement over time of one community by another community with different dominant species is termed natural succession. There are two kinds of succession: • Primary succession Different communities beco ...
ecosystem - Chipley Biology
... and political factors often influence the short-term distribution of resources needed by a specific human population. An understanding of ecological principles can help us understand the global and regional consequences of competition among humans for the scarce natural resources that support us. ...
... and political factors often influence the short-term distribution of resources needed by a specific human population. An understanding of ecological principles can help us understand the global and regional consequences of competition among humans for the scarce natural resources that support us. ...
AP BIOLOGY SUMMER QUESTIONS
... 1. Why is the transfer of energy in an ecosystem referred to as energy flow, not energy cycling? 2. How are detritivores essential to sustaining ecosystems? 3. Why is only a small portion of the solar energy that strikes Earth’s atmosphere stored by primary producers? 4. What is the difference betw ...
... 1. Why is the transfer of energy in an ecosystem referred to as energy flow, not energy cycling? 2. How are detritivores essential to sustaining ecosystems? 3. Why is only a small portion of the solar energy that strikes Earth’s atmosphere stored by primary producers? 4. What is the difference betw ...
Document
... 15. No; within any ecosystem, each species plays a distinct role by which it gathers the resources necessary for life. Since resources such as sunlight, food, and water are limited, organisms that attempt to use those resources in exactly the same way will compete. Competition will lead species to e ...
... 15. No; within any ecosystem, each species plays a distinct role by which it gathers the resources necessary for life. Since resources such as sunlight, food, and water are limited, organisms that attempt to use those resources in exactly the same way will compete. Competition will lead species to e ...
Unit 2 Test
... In an ecosystem containing the food web shown, what might happen if the weasels diappear? a. The number of snakes would decrease. b. The number of field mice would decrease. c. The number of rabbits would increase. d. There would be no change in the numbers of any consumer. Sharks are the apex (top) ...
... In an ecosystem containing the food web shown, what might happen if the weasels diappear? a. The number of snakes would decrease. b. The number of field mice would decrease. c. The number of rabbits would increase. d. There would be no change in the numbers of any consumer. Sharks are the apex (top) ...
Biology 1C Fungi and Ecology Exam (3) Study Guide
... Describe the nitrogen, carbon and phosphorus cycles (examples of them). What are three major pools where elements are accumulated (eg. living, non-living, and storage reservoirs). Know that decomposition rates have an important role in determining rates of nutrient cycling. Also, most biogeochemical ...
... Describe the nitrogen, carbon and phosphorus cycles (examples of them). What are three major pools where elements are accumulated (eg. living, non-living, and storage reservoirs). Know that decomposition rates have an important role in determining rates of nutrient cycling. Also, most biogeochemical ...
Ecological Succession Powerpoint
... What makes the difference between primary and secondary succession? The key is whether there is soil already present or does the soil need to be made from broken down rock ...
... What makes the difference between primary and secondary succession? The key is whether there is soil already present or does the soil need to be made from broken down rock ...
ecologypowerpoint - Maples Elementary School
... Population-a group of organisms of one species living in the same place at the same time that interbreed and compete with each other for resources (ex. food, mates, shelter) ...
... Population-a group of organisms of one species living in the same place at the same time that interbreed and compete with each other for resources (ex. food, mates, shelter) ...
Basic Ecology Test Study Guide
... 12. A symbiotic relationship in which both organisms benefits is known as ________________________. 13. A symbiotic relationship in which one organism benefits while one organism is harmed is known as _________________. 14. A symbiotic relationship in which one organism benefits while one organism i ...
... 12. A symbiotic relationship in which both organisms benefits is known as ________________________. 13. A symbiotic relationship in which one organism benefits while one organism is harmed is known as _________________. 14. A symbiotic relationship in which one organism benefits while one organism i ...
Ecology
... organic compounds in an ecosystem. There are two aspects of primary productivity: – Gross productivity: the entire photosynthetic production of organic compounds in an ecosystem. – Net productivity: the organic materials that remain after photosynthetic organisms in the ecosystem have used some of t ...
... organic compounds in an ecosystem. There are two aspects of primary productivity: – Gross productivity: the entire photosynthetic production of organic compounds in an ecosystem. – Net productivity: the organic materials that remain after photosynthetic organisms in the ecosystem have used some of t ...
Principles of Ecology
... Nitrogen Fixation – conversion of nitrogen gas into ammonia performed by some bacteria Denitrification – conversion of nitrates into nitrogen gas performed by some bacteria Assimilation – to incorporate (N or other substances) into cells and tissues all organisms require N to make amino acids which ...
... Nitrogen Fixation – conversion of nitrogen gas into ammonia performed by some bacteria Denitrification – conversion of nitrates into nitrogen gas performed by some bacteria Assimilation – to incorporate (N or other substances) into cells and tissues all organisms require N to make amino acids which ...
Biotic Factors
... S Can be altered by human activities S Eg. Removal of wolves = increase in carrying capacity ...
... S Can be altered by human activities S Eg. Removal of wolves = increase in carrying capacity ...
Ecosystem
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment (things like air, water and mineral soil), interacting as a system. These biotic and abiotic components are regarded as linked together through nutrient cycles and energy flows. As ecosystems are defined by the network of interactions among organisms, and between organisms and their environment, they can be of any size but usually encompass specific, limited spaces (although some scientists say that the entire planet is an ecosystem).Energy, water, nitrogen and soil minerals are other essential abiotic components of an ecosystem. The energy that flows through ecosystems is obtained primarily from the sun. It generally enters the system through photosynthesis, a process that also captures carbon from the atmosphere. By feeding on plants and on one another, animals play an important role in the movement of matter and energy through the system. They also influence the quantity of plant and microbial biomass present. By breaking down dead organic matter, decomposers release carbon back to the atmosphere and facilitate nutrient cycling by converting nutrients stored in dead biomass back to a form that can be readily used by plants and other microbes.Ecosystems are controlled both by external and internal factors. External factors such as climate, the parent material which forms the soil and topography, control the overall structure of an ecosystem and the way things work within it, but are not themselves influenced by the ecosystem. Other external factors include time and potential biota. Ecosystems are dynamic entities—invariably, they are subject to periodic disturbances and are in the process of recovering from some past disturbance. Ecosystems in similar environments that are located in different parts of the world can have very different characteristics simply because they contain different species. The introduction of non-native species can cause substantial shifts in ecosystem function. Internal factors not only control ecosystem processes but are also controlled by them and are often subject to feedback loops. While the resource inputs are generally controlled by external processes like climate and parent material, the availability of these resources within the ecosystem is controlled by internal factors like decomposition, root competition or shading. Other internal factors include disturbance, succession and the types of species present. Although humans exist and operate within ecosystems, their cumulative effects are large enough to influence external factors like climate.Biodiversity affects ecosystem function, as do the processes of disturbance and succession. Ecosystems provide a variety of goods and services upon which people depend; the principles of ecosystem management suggest that rather than managing individual species, natural resources should be managed at the level of the ecosystem itself. Classifying ecosystems into ecologically homogeneous units is an important step towards effective ecosystem management, but there is no single, agreed-upon way to do this.