Chapter 6 6.3 Biodiversity
... genetically diverse a species is, the greater its chances of surviving disturbances. So as human activity reduces genetic diversity, species are put at a greater risk for extinction. – Species diversity is also linked to ecosystem diversity. As ecosystems are damaged, the organisms that inhabit them ...
... genetically diverse a species is, the greater its chances of surviving disturbances. So as human activity reduces genetic diversity, species are put at a greater risk for extinction. – Species diversity is also linked to ecosystem diversity. As ecosystems are damaged, the organisms that inhabit them ...
Biodiversity and Conservation Biology
... • Species richness - refers to the number of species in a given area. – Density of species – Richness of Species ...
... • Species richness - refers to the number of species in a given area. – Density of species – Richness of Species ...
Biodiversity
... • Multicellular life started from only one kind and is now many kinds, so, duh. Yes, the number of different kinds of organism must have increased over time. • BUT has it been a steady increase? Is diversity still increasing now? Or has the earth reached some kind of limit on the number of kinds of ...
... • Multicellular life started from only one kind and is now many kinds, so, duh. Yes, the number of different kinds of organism must have increased over time. • BUT has it been a steady increase? Is diversity still increasing now? Or has the earth reached some kind of limit on the number of kinds of ...
Ch11RSG
... Extinction is a natural process *Paleontologists estimate that roughly ______% of all species that ever lived are now extinct *An annual rate of one extinction per 1 to 10 million species is known as the _________________ rate of extinction Earth has experienced five mass extinction episodes *Pract ...
... Extinction is a natural process *Paleontologists estimate that roughly ______% of all species that ever lived are now extinct *An annual rate of one extinction per 1 to 10 million species is known as the _________________ rate of extinction Earth has experienced five mass extinction episodes *Pract ...
The 3 levels of biodiversity are genetic diversity, species diversity
... Victoria as a food fish, but led to the extinction of several native species. ...
... Victoria as a food fish, but led to the extinction of several native species. ...
Animal Extinction - the greatest threat to mankind
... based conservation and ecosystem management - will not preserve biodiversity through the critical next century. By then, half of all species will be lost, by Wilson's calculation. To save Earth's living membrane, we must put its shattered pieces back together. Only "megapreserves" modelled on a dee ...
... based conservation and ecosystem management - will not preserve biodiversity through the critical next century. By then, half of all species will be lost, by Wilson's calculation. To save Earth's living membrane, we must put its shattered pieces back together. Only "megapreserves" modelled on a dee ...
Wildlife crime and law enforcement in protected areas
... Nouabale-Ndoki NP, Congo, compared to surrounding logging concessions. ...
... Nouabale-Ndoki NP, Congo, compared to surrounding logging concessions. ...
Indirect commensalism promotes persistence of secondary
... Competition between prey species can lead to an indirect mutualism between their consumers1,3,4 because a predator that reduces the density of its prey also reduces competition at the prey's trophic level, positively affecting other prey species and their respective consumers.. The 2012 study by D. ...
... Competition between prey species can lead to an indirect mutualism between their consumers1,3,4 because a predator that reduces the density of its prey also reduces competition at the prey's trophic level, positively affecting other prey species and their respective consumers.. The 2012 study by D. ...
Document
... ____ 16. How long does it take natural processes to produce fertile soil? a. weeks to months b. months to years c. decades to a few centuries d. several centuries to several thousands of years ____ 17. Which of the following would exhibit primary succession? a. rock exposed by a retreating glacier b ...
... ____ 16. How long does it take natural processes to produce fertile soil? a. weeks to months b. months to years c. decades to a few centuries d. several centuries to several thousands of years ____ 17. Which of the following would exhibit primary succession? a. rock exposed by a retreating glacier b ...
Biodiversity: Preserving Species
... how to select certain plant and animal species form the natural biota and to grow/raise them. • This process is called Domestication. The organisms that resulted relied on humans completely for life. • Our natural world has never been the same ...
... how to select certain plant and animal species form the natural biota and to grow/raise them. • This process is called Domestication. The organisms that resulted relied on humans completely for life. • Our natural world has never been the same ...
Slide 1
... • Extirpated- species that have disappeared from an area where they once lived, but still exist elsewhere • Extinct- A species that once occurred but no longer exists across their original range ...
... • Extirpated- species that have disappeared from an area where they once lived, but still exist elsewhere • Extinct- A species that once occurred but no longer exists across their original range ...
Community Ecology Group Project
... 1. Explain what would happen if all of the primary consumers became ecologically extinct. 2. Describe what would happen to the ecosystem if the keystone species were removed. 3. Using the acronym HIPPO, choose two of the letters and describe a specific activity and the impact to your ecosystem. How ...
... 1. Explain what would happen if all of the primary consumers became ecologically extinct. 2. Describe what would happen to the ecosystem if the keystone species were removed. 3. Using the acronym HIPPO, choose two of the letters and describe a specific activity and the impact to your ecosystem. How ...
... 6. Explain how sea otters influence the abundance of kelp, when they neither, feed on kelp, or interact directly with kelp plants in any way. 7. Explain how the population cycles of a predator and its prey species are related to one another. Use an example to illustrate your explanation. 8. On a gra ...
4.1.1-4.2.4 Biodiversity
... Tropical rainforests contain at least half of the Earth's species. Most species have evolved to inhabit very specialized niches in their ...
... Tropical rainforests contain at least half of the Earth's species. Most species have evolved to inhabit very specialized niches in their ...
Biological Diversity
... The disappearance of a species when the last of its members dies. Natural process, resulting in both mass extinction and background extinction (Loss of one species per million species per year). The current rate of extinction is much higher than this. ...
... The disappearance of a species when the last of its members dies. Natural process, resulting in both mass extinction and background extinction (Loss of one species per million species per year). The current rate of extinction is much higher than this. ...
Document
... – The starfish can not eat large mussels, so the mussels have a size-related refuge from predation – This mussel can out-compete other invertebrates for space, but the starfish takes away that ...
... – The starfish can not eat large mussels, so the mussels have a size-related refuge from predation – This mussel can out-compete other invertebrates for space, but the starfish takes away that ...
Document
... 18. Create a flowchart that helps to explain the factors leading to increases and decreases in local and regional diversity. 19. What is the theory of island biogeography? Who formalized the theory? What is an equilibrium number of species? How is island size and distance from mainland related to sp ...
... 18. Create a flowchart that helps to explain the factors leading to increases and decreases in local and regional diversity. 19. What is the theory of island biogeography? Who formalized the theory? What is an equilibrium number of species? How is island size and distance from mainland related to sp ...
document
... • Species extinction – Lake Victoria-80% cichlids – 1950s-overfishing – Introduced Nile Perch to increase pops – 1970...cichlids only 1%! (200 of the 400 cichlid species now extinct b/c competition) – “benefit” for fishermen; “bad” for diversity ...
... • Species extinction – Lake Victoria-80% cichlids – 1950s-overfishing – Introduced Nile Perch to increase pops – 1970...cichlids only 1%! (200 of the 400 cichlid species now extinct b/c competition) – “benefit” for fishermen; “bad” for diversity ...
Biodiversity and Conservation Notes
... Extinction = species or larger group dying out / disappearing ...
... Extinction = species or larger group dying out / disappearing ...
Interactions in Ecosystems - Salisbury Composite High School
... Blackburnian – only at tops of trees ...
... Blackburnian – only at tops of trees ...
Fact Sheet on the Endangered Species Act
... rusty-patched bumble bee and the monarch butterfly. For more information on specific species visit: www.ESAwatch.org/ regional/ ...
... rusty-patched bumble bee and the monarch butterfly. For more information on specific species visit: www.ESAwatch.org/ regional/ ...
Chapter 5 Ecosystems and the Living Environment
... that make them more/less “fit” for their environment Limits to Population Growth(Struggle for Survival): environment can’t support everyone (Competition for resources, predation, or disease) Differential Reproductive Success: Those individuals with the most “fit” traits for their environment are mor ...
... that make them more/less “fit” for their environment Limits to Population Growth(Struggle for Survival): environment can’t support everyone (Competition for resources, predation, or disease) Differential Reproductive Success: Those individuals with the most “fit” traits for their environment are mor ...
Extinction
In biology and ecology, extinction is the end of an organism or of a group of organisms (taxon), normally a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly ""reappears"" (typically in the fossil record) after a period of apparent absence.The age of the Earth is about 4.54 billion years old. The earliest undisputed evidence of life on Earth dates at least from 3.5 billion years ago, during the Eoarchean Era after a geological crust started to solidify following the earlier molten Hadean Eon. There are microbial mat fossils found in 3.48 billion-year-old sandstone discovered in Western Australia. Other early physical evidence of a biogenic substance is graphite in 3.7 billion-year-old metasedimentary rocks discovered in Western Greenland. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.Through evolution, species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche—and species become extinct when they are no longer able to survive in changing conditions or against superior competition. The relationship between animals and their ecological niches has been firmly established. A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive with virtually no morphological change for hundreds of millions of years. Mass extinctions are relatively rare events; however, isolated extinctions are quite common. Only recently have extinctions been recorded and scientists have become alarmed at the current high rate of extinctions. Most species that become extinct are never scientifically documented. Some scientists estimate that up to half of presently existing plant and animal species may become extinct by 2100.