PPT
... toward extinction at an alarming rate. – The present rate of species loss • May be 1,000 times higher than at any time in the past 100,000 years • May result in the loss of half of all living plant and animal species by the end of this century ...
... toward extinction at an alarming rate. – The present rate of species loss • May be 1,000 times higher than at any time in the past 100,000 years • May result in the loss of half of all living plant and animal species by the end of this century ...
The Effects of Invasive Green Crabs on Native Species, presentation
... Photos – K. Ellis; Larvae - www.mesa.edu.au ...
... Photos – K. Ellis; Larvae - www.mesa.edu.au ...
06 Understanding Populations COMPLETE
... __________________________________________average time it takes a member of a population to reach the age when it can reproduce. 1. Some bacteria can reproduce when they are only 20 minutes old ________________________________________________________________________________________ 2. Larger organis ...
... __________________________________________average time it takes a member of a population to reach the age when it can reproduce. 1. Some bacteria can reproduce when they are only 20 minutes old ________________________________________________________________________________________ 2. Larger organis ...
Year 12 Biology
... • Loss of predators removal of predators (sg spiders, wolves) can lead to population explosions of prey species • Introduction of new carnivore eg foxes, cats, dogs loss of native wildlife • Introduction of new herbivore eg rabbit, sheep, may outcompete natives loss of native species; may ...
... • Loss of predators removal of predators (sg spiders, wolves) can lead to population explosions of prey species • Introduction of new carnivore eg foxes, cats, dogs loss of native wildlife • Introduction of new herbivore eg rabbit, sheep, may outcompete natives loss of native species; may ...
1.2 PowerPoint - WordPress.com
... • A niche refers to the role an organism has within an ecosystem, physically, chemically and biologically. Coyotes compete over • Competition occurs when a resource is habitat or food sources. needed by two or more individuals. Competition usually means resources are limited. This limits the siz ...
... • A niche refers to the role an organism has within an ecosystem, physically, chemically and biologically. Coyotes compete over • Competition occurs when a resource is habitat or food sources. needed by two or more individuals. Competition usually means resources are limited. This limits the siz ...
People and Their Environment: Southeast Asia
... have polluted and harmed the local environment. • Urbanization also strains shared local resources such as water supplies. • Toxic waste dumping, mining, and fishing are all activities causing water pollution in the area. • Air pollution is becoming increasingly worse, as forests are cleared by fire ...
... have polluted and harmed the local environment. • Urbanization also strains shared local resources such as water supplies. • Toxic waste dumping, mining, and fishing are all activities causing water pollution in the area. • Air pollution is becoming increasingly worse, as forests are cleared by fire ...
Community Interactions: Competition, Predation and Symbiosis Part
... Predator-prey interactions help shape communities. A predator is an organism that hunts and kills other organisms for food. Prey are the organisms hunted or eaten by a predator. Predation is the act of one organism, a predator, feeding on another organism, its prey. Predator and prey populations inf ...
... Predator-prey interactions help shape communities. A predator is an organism that hunts and kills other organisms for food. Prey are the organisms hunted or eaten by a predator. Predation is the act of one organism, a predator, feeding on another organism, its prey. Predator and prey populations inf ...
BEAVER DAM LAKE - I Fish Illinois
... STATUS OF THE SPORT FISHERY – Annual stockings include: 400 - 8” northern pike, 10,500 – 2” walleye, and 3000 – 8” channel catfish. Below is a brief description of catchable game species in this water body. LARGEMOUTH BASS – Bass were collected at a rate of 0.68/minute which was just below the goal ...
... STATUS OF THE SPORT FISHERY – Annual stockings include: 400 - 8” northern pike, 10,500 – 2” walleye, and 3000 – 8” channel catfish. Below is a brief description of catchable game species in this water body. LARGEMOUTH BASS – Bass were collected at a rate of 0.68/minute which was just below the goal ...
Ecology Unit
... • Pollution: air, water, noise • Global Warming: Earth’s atmosphere heating up due to trapped gases (fossil fuels) – Ex: Arctic, where rising temperatures and melting ice are dramatically changing the region’s unique landscapes and wildlife ...
... • Pollution: air, water, noise • Global Warming: Earth’s atmosphere heating up due to trapped gases (fossil fuels) – Ex: Arctic, where rising temperatures and melting ice are dramatically changing the region’s unique landscapes and wildlife ...
Unit 2 Ecology
... A. Biodiversity refers to the variety of species within a given area 1. Ex. One hectare of a cornfield has less biodiversity than one hectare of a rain forest 2. Will differ from place to place on the Earth B. The higher the biodiversity, the more stable an ecosystem 1. The loss of one species will ...
... A. Biodiversity refers to the variety of species within a given area 1. Ex. One hectare of a cornfield has less biodiversity than one hectare of a rain forest 2. Will differ from place to place on the Earth B. The higher the biodiversity, the more stable an ecosystem 1. The loss of one species will ...
Name HUMAN IMPACT TEST- Chapter 6 MULTIPLE CHOICE
... Ozone depletion has been caused by _______________________________ A. burning fossil fuels B. urban sprawl C. using CFC’s in aerosols, refrigerators, and air conditioners D. deforestation of rainforests Dead zones are caused by ___________________________. A. using aerosols with CFC’s B. fertilizer ...
... Ozone depletion has been caused by _______________________________ A. burning fossil fuels B. urban sprawl C. using CFC’s in aerosols, refrigerators, and air conditioners D. deforestation of rainforests Dead zones are caused by ___________________________. A. using aerosols with CFC’s B. fertilizer ...
ch 8 practice test a
... particular species at a particular time is determined by the a. number of individuals in the species. b. distribution of the population. c. reproductive potential of the species. d. supply of the most limited resources. _____ 16. Competition for food cannot occur a. between two populations. b. among ...
... particular species at a particular time is determined by the a. number of individuals in the species. b. distribution of the population. c. reproductive potential of the species. d. supply of the most limited resources. _____ 16. Competition for food cannot occur a. between two populations. b. among ...
Value and Maintenance of Biodiversity
... Redundancy in Ecosystems • Major patterns of energy flow and distribution of biomass in existing ecological systems may be broadly insensitive to species numbers • But systems with higher diversity and more kinds of interactions may be more buffered from fluctuations • Lack of data regarding the li ...
... Redundancy in Ecosystems • Major patterns of energy flow and distribution of biomass in existing ecological systems may be broadly insensitive to species numbers • But systems with higher diversity and more kinds of interactions may be more buffered from fluctuations • Lack of data regarding the li ...
Community Interactions Notes
... Oregon State University. Ripple studies wolves' effects on Yellowstone. "Now with the reintroduction of wolves, Yellowstone has all of the top predators it has had for thousands of years." Today between 250 and 300 wolves live in Yellowstone—and they have already left their mark. For example, wolves ...
... Oregon State University. Ripple studies wolves' effects on Yellowstone. "Now with the reintroduction of wolves, Yellowstone has all of the top predators it has had for thousands of years." Today between 250 and 300 wolves live in Yellowstone—and they have already left their mark. For example, wolves ...
Geographical shifts - IUCN Academy of Environmental Law
... Not in the US endangered species list Very much sensitive to temperatures Disappearing from lower elevations. In Yosemite National Park: from 7800 feet to 9500 feet in 90 years (Ruhl 2008) Nine out of 25 known pika populations in the Great Basin of Nevada and Utah disappeared over the past c ...
... Not in the US endangered species list Very much sensitive to temperatures Disappearing from lower elevations. In Yosemite National Park: from 7800 feet to 9500 feet in 90 years (Ruhl 2008) Nine out of 25 known pika populations in the Great Basin of Nevada and Utah disappeared over the past c ...
1 - contentextra
... This index takes into account the number of individuals of each species present and the number of species. If one species is dominant in an ecosystem, it is less diverse than an ecosystem with more evenly distributed organisms. The formula for the index and some practice calculations are found on pa ...
... This index takes into account the number of individuals of each species present and the number of species. If one species is dominant in an ecosystem, it is less diverse than an ecosystem with more evenly distributed organisms. The formula for the index and some practice calculations are found on pa ...
Species Concept
... Species are at LEAST risk for extinction if they: 1. Are highly specialized for their niche. 2. Have a widespread distribution. 3. Are losing their habitat. 4. Must compete with invasive species. ...
... Species are at LEAST risk for extinction if they: 1. Are highly specialized for their niche. 2. Have a widespread distribution. 3. Are losing their habitat. 4. Must compete with invasive species. ...
Unit IV Biodiversity
... The idea here is that the more species that exist in a particular habitat, the more varied the food sources, the more predator/prey interation, and the more choices organisms have for mates, thus keeping populations healthy. Unfortunately, this usually requires a large natural area and in today’s re ...
... The idea here is that the more species that exist in a particular habitat, the more varied the food sources, the more predator/prey interation, and the more choices organisms have for mates, thus keeping populations healthy. Unfortunately, this usually requires a large natural area and in today’s re ...
Environmental Science
... a. natural conditions are neither ideal nor constant b. resources are used up c. the environment changes d. deaths increase e. births decrease f. natural selection allows only some members to survive and reproduce 2. carrying capacity- the maximum population that the ecosystem can support indefinite ...
... a. natural conditions are neither ideal nor constant b. resources are used up c. the environment changes d. deaths increase e. births decrease f. natural selection allows only some members to survive and reproduce 2. carrying capacity- the maximum population that the ecosystem can support indefinite ...
Lecture 09 - Extinction vulnerability
... Lecture 9: Vulnerability to Extinction Defining Extinction • Extinction is hard to define • Rule of thumb is that a species is extinct after no evidence of it exists for 50 years • Cahow—rare seabird thought to be extinct since 1621, but rediscovered in 1906 and a breeding colony discovered in 1951 ...
... Lecture 9: Vulnerability to Extinction Defining Extinction • Extinction is hard to define • Rule of thumb is that a species is extinct after no evidence of it exists for 50 years • Cahow—rare seabird thought to be extinct since 1621, but rediscovered in 1906 and a breeding colony discovered in 1951 ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.