What Is Biodiversity?
... sources is runoff. Runoff picks up chemicals such as fertilizer from agricultural fields, lawns, and golf courses and carries the chemicals to bodies of water. • The added nutrients from fertilizer often cause excessive growth of algae, creating algal blooms and a condition ...
... sources is runoff. Runoff picks up chemicals such as fertilizer from agricultural fields, lawns, and golf courses and carries the chemicals to bodies of water. • The added nutrients from fertilizer often cause excessive growth of algae, creating algal blooms and a condition ...
Disturbance - Iowa State University
... ecosystem affected by disturbance; e.g., prairie fire in spring has different effects on species composition and nutrient cycling than a fire in the fall 4) Disturbance area: absolute and relative size of disturbance area and the shape have important effects on ...
... ecosystem affected by disturbance; e.g., prairie fire in spring has different effects on species composition and nutrient cycling than a fire in the fall 4) Disturbance area: absolute and relative size of disturbance area and the shape have important effects on ...
P: Chapter 55 Study Guide
... b. R. odentia is a small rodent-like herbivore that exists in small numbers in the forest. Its preferred food and habitat are found along the edges of the forest and are composed primarily of herbaceous (non-woody) annual plants that produce tender shoots in the spring and plentiful seeds later in t ...
... b. R. odentia is a small rodent-like herbivore that exists in small numbers in the forest. Its preferred food and habitat are found along the edges of the forest and are composed primarily of herbaceous (non-woody) annual plants that produce tender shoots in the spring and plentiful seeds later in t ...
Biology - Riverside Military Academy
... Chapter 4: population density; dispersion; density-independent factor; density-dependent factor; population growth rate; emigration; immigration; carrying capacity; demography; demographic transition; zero population growth; age structure Chapter 5: extinction; biodiversity; genetic diversity; speci ...
... Chapter 4: population density; dispersion; density-independent factor; density-dependent factor; population growth rate; emigration; immigration; carrying capacity; demography; demographic transition; zero population growth; age structure Chapter 5: extinction; biodiversity; genetic diversity; speci ...
Humans in the Biosphere - Gallipolis City Schools
... variety of all organisms in the biosphere • Ecosystem diversity – the variety of habitats, communities, and ecological processes in the living world • Genetic diversity – the total sum of all the genetic information carried by all the organisms on earth • Biodiversity is one of the earth’s greatest ...
... variety of all organisms in the biosphere • Ecosystem diversity – the variety of habitats, communities, and ecological processes in the living world • Genetic diversity – the total sum of all the genetic information carried by all the organisms on earth • Biodiversity is one of the earth’s greatest ...
chapter 12 - Geoclassroom Home
... fossil record. The lack of hard parts before the Cambrian explosion means that there are fewer soft-bodied specimens preserved in the fossil record, not that the life forms didn’t exist. It is possible that the Cambrian is a recording of the diversity of life that was already present—but that didn’t ...
... fossil record. The lack of hard parts before the Cambrian explosion means that there are fewer soft-bodied specimens preserved in the fossil record, not that the life forms didn’t exist. It is possible that the Cambrian is a recording of the diversity of life that was already present—but that didn’t ...
Chapter 9 Notes
... HUMAN ACTIVITIES ARE DESTROYING AND DEGRADING BIODIVERSIT Y Human activity has disturbed at least half of the earth’s land surface, 83% Fills in wetlands Converts grasslands and forests to crop fields and urban areas ...
... HUMAN ACTIVITIES ARE DESTROYING AND DEGRADING BIODIVERSIT Y Human activity has disturbed at least half of the earth’s land surface, 83% Fills in wetlands Converts grasslands and forests to crop fields and urban areas ...
Allowing extinction: should we let species go?
... the use of triage when allocating resources to competing conservation demands. Contrary to simply being an efficient approach, however, we feel that application of triage has the potential to mimic carnage of the 19th century battlefields from which the practice arose [2]. Under medical triage, the ...
... the use of triage when allocating resources to competing conservation demands. Contrary to simply being an efficient approach, however, we feel that application of triage has the potential to mimic carnage of the 19th century battlefields from which the practice arose [2]. Under medical triage, the ...
Document
... • Natural changes due to new species evolving and extinction • General increase that should theoretically occur over time – Extinction events – cleans the slate – Natural extinction – 90% of species ever alive are extint now ...
... • Natural changes due to new species evolving and extinction • General increase that should theoretically occur over time – Extinction events – cleans the slate – Natural extinction – 90% of species ever alive are extint now ...
Chapter 18 NOTES - schallesbiology
... Can carrying capacity be increased? • Yes, TECHNOLOGY can increase how many individuals the environment can support- for example, agriculture, use of fuels, etc. can increase resources for population growth. • Many professors discard the notion of a human carrying capacity altogether, claiming that ...
... Can carrying capacity be increased? • Yes, TECHNOLOGY can increase how many individuals the environment can support- for example, agriculture, use of fuels, etc. can increase resources for population growth. • Many professors discard the notion of a human carrying capacity altogether, claiming that ...
Evolution and Biodiversity
... Permian: 90% of animal families, including over 95% of marine species; many trees, amphibians, most bryozoans and brachiopods, all trilobites. ...
... Permian: 90% of animal families, including over 95% of marine species; many trees, amphibians, most bryozoans and brachiopods, all trilobites. ...
Topic 4 - Human activity affects biological diversity
... Extirpation is a local extinction, or the disappearance of a species from a particular area. The grizzly bear was once commonly found from the mountains of British Columbia to the Manitoba Prairies. They had a rich supply of fish, small mammals, and plants on which to feed. Grizzlies are now mainly ...
... Extirpation is a local extinction, or the disappearance of a species from a particular area. The grizzly bear was once commonly found from the mountains of British Columbia to the Manitoba Prairies. They had a rich supply of fish, small mammals, and plants on which to feed. Grizzlies are now mainly ...
Watershed Structure and Function Related to Ecological
... community (species really matter) 8. Natural systems recycle essential nutrients 9. Climates change – communities change 10. Natural systems are products of evolution ...
... community (species really matter) 8. Natural systems recycle essential nutrients 9. Climates change – communities change 10. Natural systems are products of evolution ...
Three Key Features of a Population
... • Declining birth rate or increasing death rate are caused by several limiting factors including: • Competition: ...
... • Declining birth rate or increasing death rate are caused by several limiting factors including: • Competition: ...
Genetic Diversity and Marine Populations
... (remotely operated vehicle surveys) suggest that current population size is in the 1,000 to 2,000 range in about 1000 ha • On average they are about 50 m apart from one another (low fertilization Allee effects) • Listing under ESA in May 2005 as an endangered species ...
... (remotely operated vehicle surveys) suggest that current population size is in the 1,000 to 2,000 range in about 1000 ha • On average they are about 50 m apart from one another (low fertilization Allee effects) • Listing under ESA in May 2005 as an endangered species ...
Island Biogeography: Patterns in Species Richness Island Patterns
... very rare. He also pointed out that small, isolated islands have fewer species that are more prone to extinction because of their rarity. ...
... very rare. He also pointed out that small, isolated islands have fewer species that are more prone to extinction because of their rarity. ...
Evolution of Australian Biota Study Day
... you will need to have a good understanding of biology. Some of the main points to have in mind are: A) Humans only live a short amount of time ‐ lots of the processes we are studying (ie evolution) take place over much larger timeframes B) The world is a changing place ‐ the continents move, the cli ...
... you will need to have a good understanding of biology. Some of the main points to have in mind are: A) Humans only live a short amount of time ‐ lots of the processes we are studying (ie evolution) take place over much larger timeframes B) The world is a changing place ‐ the continents move, the cli ...
Chapter 1 Environmental Problems, Their Causes
... of its people without undermining the ability of future generations to do the same. The world’s population is growing about 1.2% per year, which adds about 77 million people per year. Economic growth increases a country’s capacity to provide goods and services to its people. Economic development use ...
... of its people without undermining the ability of future generations to do the same. The world’s population is growing about 1.2% per year, which adds about 77 million people per year. Economic growth increases a country’s capacity to provide goods and services to its people. Economic development use ...
Ecological Succession
... After many years, a stable ecosystem develops. Often, this is a forest ecosystem. Depending on the ecosystem’s abiotic factors, however, a stable ecosystem may be a mature desert community, a coral reef, or any other kind of ecosystem on Earth. The final stage of ecological succession is called the ...
... After many years, a stable ecosystem develops. Often, this is a forest ecosystem. Depending on the ecosystem’s abiotic factors, however, a stable ecosystem may be a mature desert community, a coral reef, or any other kind of ecosystem on Earth. The final stage of ecological succession is called the ...
predation - Gulf Coast State College
... + and – consequences of biodiversity loss • Biodiversity contributes to many aspects of human well-being, for instance by providing raw materials and contributing to health. • Biodiversity loss has-direct and indirect negative effects on several factors including food security, vulnerability, healt ...
... + and – consequences of biodiversity loss • Biodiversity contributes to many aspects of human well-being, for instance by providing raw materials and contributing to health. • Biodiversity loss has-direct and indirect negative effects on several factors including food security, vulnerability, healt ...
Chapter 12
... weight) of the low trophic levels is larger than high levels • This is necessary to support the chain as part of the principle of the trophic pyramid • Habitat fragmentation causes low levels of the trophic pyramid to shrink, so the higher levels also shrink ...
... weight) of the low trophic levels is larger than high levels • This is necessary to support the chain as part of the principle of the trophic pyramid • Habitat fragmentation causes low levels of the trophic pyramid to shrink, so the higher levels also shrink ...
File - Oxford Megafauna conference
... Department of Earth Sciences, Natural History Museum, London, UK A global database of some 2400 published and new radiocarbon dates on woolly mammoth (Mammuthus primigenius) has been audited, using objective criteria, to around 1900 ‘good’ dates. This represents by far the largest number of dates fo ...
... Department of Earth Sciences, Natural History Museum, London, UK A global database of some 2400 published and new radiocarbon dates on woolly mammoth (Mammuthus primigenius) has been audited, using objective criteria, to around 1900 ‘good’ dates. This represents by far the largest number of dates fo ...
chapter 5 - Avon Community School Corporation
... – Occurs when stable ecosystems are changed by: other organisms, climate changes, or natural disasters – Predicted that 1/3 to 2/3 of all plant & animal species, mostly near the equator, will become extinct during 2nd half of this century. • Mass extinction is events where a large percentage of all ...
... – Occurs when stable ecosystems are changed by: other organisms, climate changes, or natural disasters – Predicted that 1/3 to 2/3 of all plant & animal species, mostly near the equator, will become extinct during 2nd half of this century. • Mass extinction is events where a large percentage of all ...
ppt - Fullfrontalanatomy.com
... Permian: 90% of animal families, including over 95% of marine species; many trees, amphibians, most bryozoans and brachiopods, all trilobites. ...
... Permian: 90% of animal families, including over 95% of marine species; many trees, amphibians, most bryozoans and brachiopods, all trilobites. ...
Population
... Earth has had several mass extinctions • Background extinction rate: extinction usually occurs one species at a time - Most historical extinctions • Mass extinction events: 5 events in Earth’s history that killed off massive numbers of species at once - 50-95% of all species went extinct at one tim ...
... Earth has had several mass extinctions • Background extinction rate: extinction usually occurs one species at a time - Most historical extinctions • Mass extinction events: 5 events in Earth’s history that killed off massive numbers of species at once - 50-95% of all species went extinct at one tim ...
Holocene extinction
The Holocene extinction, sometimes called the Sixth Extinction, is a name proposed to describe the currently ongoing extinction event of species during the present Holocene epoch (since around 10,000 BCE) mainly due to human activity. The large number of extinctions span numerous families of plants and animals including mammals, birds, amphibians, reptiles and arthropods. Although 875 extinctions occurring between 1500 and 2009 have been documented by the International Union for Conservation of Nature and Natural Resources, the vast majority are undocumented. According to the species-area theory and based on upper-bound estimating, the present rate of extinction may be up to 140,000 species per year.The Holocene extinction includes the disappearance of large mammals known as megafauna, starting between 9,000 and 13,000 years ago, the end of the last Ice Age. This may have been due to the extinction of the mammoths whose habits had maintained grasslands which became birch forests without them. The new forest and the resulting forest fires may have induced climate change. Such disappearances might be the result of the proliferation of modern humans. These extinctions, occurring near the Pleistocene–Holocene boundary, are sometimes referred to as the Quaternary extinction event. The Holocene extinction continues into the 21st century.There is no general agreement on whether to consider this as part of the Quaternary extinction event, or as a distinct event resulting from human-caused changes. Only during the most recent parts of the extinction have plants also suffered large losses. Overall, the Holocene extinction can be characterized by the human impact on the environment.