![conservation](http://s1.studyres.com/store/data/001587961_1-6e62fcea6d9841a61a33482a4c4efee1-300x300.png)
conservation
... Conservation or Preservation? • Conservation is the maintenance of biodiversity (between species and genetic diversity within species) and of a variety of habitats and ecosystems. It carries a social and economic cost for the local community. • Preservation is the protection of areas that as yet ar ...
... Conservation or Preservation? • Conservation is the maintenance of biodiversity (between species and genetic diversity within species) and of a variety of habitats and ecosystems. It carries a social and economic cost for the local community. • Preservation is the protection of areas that as yet ar ...
Evolution (Speciation)
... 8 Evolution is the result of genetic changes that occur in constantly changing environments. As a basis for understanding this concept: 8.a Students know how natural selection determines the differential survival of groups of organisms. 8.b Students know a great diversity of species increases the ch ...
... 8 Evolution is the result of genetic changes that occur in constantly changing environments. As a basis for understanding this concept: 8.a Students know how natural selection determines the differential survival of groups of organisms. 8.b Students know a great diversity of species increases the ch ...
Communities, Ecosystems, and Biodiversity
... Similar to photosynthesis, but some predation Nutrient input from smokers, detritus Organisms tightly coupled with environment Open or closed system? Patches far apart, smokers ltd time Organisms have to get there somehow! ...
... Similar to photosynthesis, but some predation Nutrient input from smokers, detritus Organisms tightly coupled with environment Open or closed system? Patches far apart, smokers ltd time Organisms have to get there somehow! ...
Extinction
... • Accounted for half the value of eastern timber • Devastated by blight 1904-30 • Isolated trees and viable roots still survive • Research on blight immunization • Even if blight cured, other trees have filled ecological niche ...
... • Accounted for half the value of eastern timber • Devastated by blight 1904-30 • Isolated trees and viable roots still survive • Research on blight immunization • Even if blight cured, other trees have filled ecological niche ...
Lecture 16 – Hybridization and Introgression An overlooked effect of
... and a variety of different hybrids. A hybrid species is the most dominant genotype on the landscape in North America. - Spartina cord grass – native to east coast of North America. Moved to England where it hybridized with the native creating an infertile, clonally reproducing third species. Af ...
... and a variety of different hybrids. A hybrid species is the most dominant genotype on the landscape in North America. - Spartina cord grass – native to east coast of North America. Moved to England where it hybridized with the native creating an infertile, clonally reproducing third species. Af ...
A Review of Salmon as Keystone Species and Their Utility as
... Seven species of anadromous salmon comprised of more than 9000 local populations return annually to thousands of streams in coastal and interior watersheds throughout British Columbia. Salmon are commonly used as biological indicators of state changes in marine or aquatic environments because they a ...
... Seven species of anadromous salmon comprised of more than 9000 local populations return annually to thousands of streams in coastal and interior watersheds throughout British Columbia. Salmon are commonly used as biological indicators of state changes in marine or aquatic environments because they a ...
Ecosystems and Habitats
... that live there. If there is not enough food and water animals will have to move somewhere else or they will die. ...
... that live there. If there is not enough food and water animals will have to move somewhere else or they will die. ...
Reptile Blood Parasites - MyeFolio
... the limited ability of haemogregarines to cause clinical disease. Prevention of parasitic infection can be achieved by acquiring reptiles and amphibians that are free of the parasite on blood smear examination and by using an appropriate food supply that will not introduce the parasite into the co ...
... the limited ability of haemogregarines to cause clinical disease. Prevention of parasitic infection can be achieved by acquiring reptiles and amphibians that are free of the parasite on blood smear examination and by using an appropriate food supply that will not introduce the parasite into the co ...
Honors Biology: Final Review 1. All of the members of a particular
... 5. Genetic drift tends to occur to what types of populations? 6. What is genetic equilibrium? 7. What are the conditions needed to maintain genetic equilibrium? 8. What is geographic isolation? 9. On the Galapagos islands, why were the finches beak sizes different? 10. What does the fossil record sh ...
... 5. Genetic drift tends to occur to what types of populations? 6. What is genetic equilibrium? 7. What are the conditions needed to maintain genetic equilibrium? 8. What is geographic isolation? 9. On the Galapagos islands, why were the finches beak sizes different? 10. What does the fossil record sh ...
Student Quiz 6
... • Species: Speciation can happen between two different species, for example like when a horse breeds with a donkey to produce a sterile mule. • Population: There are about 100 thousand zebras living in the savannah. (number not stated to scale; not true) • Habitat: The habitat of wildebeest ...
... • Species: Speciation can happen between two different species, for example like when a horse breeds with a donkey to produce a sterile mule. • Population: There are about 100 thousand zebras living in the savannah. (number not stated to scale; not true) • Habitat: The habitat of wildebeest ...
Student Quiz 6
... • Species: Speciation can happen between two different species, for example like when a horse breeds with a donkey to produce a sterile mule. • Population: There are about 100 thousand zebras living in the savannah. (number not stated to scale; not true) • Habitat: The habitat of wildebeest ...
... • Species: Speciation can happen between two different species, for example like when a horse breeds with a donkey to produce a sterile mule. • Population: There are about 100 thousand zebras living in the savannah. (number not stated to scale; not true) • Habitat: The habitat of wildebeest ...
Characteristics of Populations
... 1. Has to have abundant space and food 2. Is well protected from predators and disease ...
... 1. Has to have abundant space and food 2. Is well protected from predators and disease ...
Ecological effects of habitat fragmentation and edge creation
... Habitat fragmentation involves both a reduction in the total area of habitat and a change of configuration into smaller and more isolated patches, embedded in a highly altered matrix. The phenomenon is complex and largely system-specific, but some generalizations about the biological consequences of ...
... Habitat fragmentation involves both a reduction in the total area of habitat and a change of configuration into smaller and more isolated patches, embedded in a highly altered matrix. The phenomenon is complex and largely system-specific, but some generalizations about the biological consequences of ...
Populations Lesson Outline A. 1.
... is the potential growth of a population if it could grow in perfect conditions with no limiting factors. ...
... is the potential growth of a population if it could grow in perfect conditions with no limiting factors. ...
The Loss of Biodiversity
... • A species that happens to be at risk of disappearing if their current trend continues is defined as threatened • A loss of a population in a local area is called a extirpation • A loss of a species completely is called an extinction ...
... • A species that happens to be at risk of disappearing if their current trend continues is defined as threatened • A loss of a population in a local area is called a extirpation • A loss of a species completely is called an extinction ...
Population Dynamics
... Q. If the population of prey declines suggest two possible consequences for the predators. A. ________________________________________________________________________________________ Q. What is scramble competition? A. _________________________________________________________________________________ ...
... Q. If the population of prey declines suggest two possible consequences for the predators. A. ________________________________________________________________________________________ Q. What is scramble competition? A. _________________________________________________________________________________ ...
Extinction Processes
... • Environmental stochasticity results from random variation in habitat quality • climate and water • species interactions • more difficult to model, usually limited to a few key variables ...
... • Environmental stochasticity results from random variation in habitat quality • climate and water • species interactions • more difficult to model, usually limited to a few key variables ...
Kanda: Research in Biology
... is, how and why animals use their space and move from one space to another. While my experience is in mammals, I am also interested in movement ecology of other organisms, particularly dispersal at the edge of species’ ranges and migratory movements, and how these movements influence the population ...
... is, how and why animals use their space and move from one space to another. While my experience is in mammals, I am also interested in movement ecology of other organisms, particularly dispersal at the edge of species’ ranges and migratory movements, and how these movements influence the population ...
Human Impact
... • Prairie Dogs have long been vilified by ranchers and others who believe that they damage the range and take valuable forage away from cattle and other livestock. In fact, prairie dogs are what is known as a keystone species, a species whose very presence contributes to the diversity of life and wh ...
... • Prairie Dogs have long been vilified by ranchers and others who believe that they damage the range and take valuable forage away from cattle and other livestock. In fact, prairie dogs are what is known as a keystone species, a species whose very presence contributes to the diversity of life and wh ...
Biology Notes: Ecology
... 2. What are two reasons that populations will increase?__________________________ , ________________________ 3. What are two reasons that populations will decrease?_________________________ , ________________________ 4. What are factors that control population growth called? ______________________ ...
... 2. What are two reasons that populations will increase?__________________________ , ________________________ 3. What are two reasons that populations will decrease?_________________________ , ________________________ 4. What are factors that control population growth called? ______________________ ...
Climate shifts Mass. butterfly species
... at the Harvard Forest in Petersham, Mass. “It’s now strikingly easy to see pervasive effects of climate change.” Changing butterfly populations could have deeper effects on the ecosystem. Because most butterflies are finicky eaters when they are larvae, the plants that local butterflies eat will cha ...
... at the Harvard Forest in Petersham, Mass. “It’s now strikingly easy to see pervasive effects of climate change.” Changing butterfly populations could have deeper effects on the ecosystem. Because most butterflies are finicky eaters when they are larvae, the plants that local butterflies eat will cha ...
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. ...
Extinction
... Probable Cause: Us Habitat destruction - estimated that 5-10% of species will be extinct in thirty years Global warming – estimated that ~35% of species will become committed to extinction in the next fifty years ...
... Probable Cause: Us Habitat destruction - estimated that 5-10% of species will be extinct in thirty years Global warming – estimated that ~35% of species will become committed to extinction in the next fifty years ...
Decline in amphibian populations
![](https://en.wikipedia.org/wiki/Special:FilePath/Bufo_periglenes2.jpg?width=300)
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.