Human Impact Ecology
... • Habitat-place where an organism lives. • Niche-role and position a species has in its environment. – Organisms with the same niche compete if they are in the same habitat. ...
... • Habitat-place where an organism lives. • Niche-role and position a species has in its environment. – Organisms with the same niche compete if they are in the same habitat. ...
Protecting Threatened and Endangered Species
... Passage of the Endangered Species Act of 1973 gave the United States one of the most far-reaching laws ever enacted by any country to prevent the extinction of at risk animals and plants. Why should we save threatened and endangered species? Congress held that these species “are of aesthetic, ecolog ...
... Passage of the Endangered Species Act of 1973 gave the United States one of the most far-reaching laws ever enacted by any country to prevent the extinction of at risk animals and plants. Why should we save threatened and endangered species? Congress held that these species “are of aesthetic, ecolog ...
Causes and Consequences of Species Extinctions
... evant to the current biodiversity crisis. This sixth great extinction is likely to be most catastrophic in tropical regions given the high species diversity there (more than two-thirds of all species) and the large, expanding human populations that threaten most species there as well. The major ‘‘sy ...
... evant to the current biodiversity crisis. This sixth great extinction is likely to be most catastrophic in tropical regions given the high species diversity there (more than two-thirds of all species) and the large, expanding human populations that threaten most species there as well. The major ‘‘sy ...
Chapter 3: The Biosphere
... • Three factors affect population size: – number of births – number of deaths – number of individuals that enter or leave the population. * Simply put, a population will increase or decrease in size depending on how many individuals are added to it or removed from it ...
... • Three factors affect population size: – number of births – number of deaths – number of individuals that enter or leave the population. * Simply put, a population will increase or decrease in size depending on how many individuals are added to it or removed from it ...
Ecology PP - Teacher Copy
... • Three factors affect population size: – number of births – number of deaths – number of individuals that enter or leave the population. * Simply put, a population will increase or decrease in size depending on how many individuals are added to it or removed from it ...
... • Three factors affect population size: – number of births – number of deaths – number of individuals that enter or leave the population. * Simply put, a population will increase or decrease in size depending on how many individuals are added to it or removed from it ...
All Ecology Chapters PPT 52-55
... • Conservation biology is a goal-oriented science that seeks to counter the biodiversity crisis, the current rapid decrease in Earth’s variety of life. • Extinction is a natural phenomenon that has been occurring since life evolved on earth. – The current rate of extinction is what underlies the bio ...
... • Conservation biology is a goal-oriented science that seeks to counter the biodiversity crisis, the current rapid decrease in Earth’s variety of life. • Extinction is a natural phenomenon that has been occurring since life evolved on earth. – The current rate of extinction is what underlies the bio ...
Name____________________ Date__________ Pd
... Male lions fighting/competing over a female lion Deer and cattle fighting/competing for grass 35. What is carrying capacity? The maximum, equilibrium number of organisms of a particular species that can be supported indefinitely in a given environment. ...
... Male lions fighting/competing over a female lion Deer and cattle fighting/competing for grass 35. What is carrying capacity? The maximum, equilibrium number of organisms of a particular species that can be supported indefinitely in a given environment. ...
3.2 Communities
... Ecosystem engineers are species that cause such dramatic changes to landscapes that they create a new ecosystem. In a matter of a few weeks, beavers can convert a small stream in a forest into an aquatic ecosystem that suits their needs perfectly. By building dams across streams and creeks, they cre ...
... Ecosystem engineers are species that cause such dramatic changes to landscapes that they create a new ecosystem. In a matter of a few weeks, beavers can convert a small stream in a forest into an aquatic ecosystem that suits their needs perfectly. By building dams across streams and creeks, they cre ...
biological diversity and its loss
... In 1980, a theory dealing with crises in the history of life arose which has revolutionized historical geology. Alvarez et a[. (1980) found a thin stratigraphic layer that was rich in the relatively rare element iridium. This layer occurred at the Cretaceous-Tertiary strailgraphic bounda in a number ...
... In 1980, a theory dealing with crises in the history of life arose which has revolutionized historical geology. Alvarez et a[. (1980) found a thin stratigraphic layer that was rich in the relatively rare element iridium. This layer occurred at the Cretaceous-Tertiary strailgraphic bounda in a number ...
degradation - University of Arizona | Ecology and Evolutionary Biology
... populations of all native species, perpetuates natural disturbance regimes on the regional scale, adopts a planning timeline of centuries, and allows human use at levels that do not result in long-term ecological degradation” Ecosystem: -energy and nutrient processing system with physical structure ...
... populations of all native species, perpetuates natural disturbance regimes on the regional scale, adopts a planning timeline of centuries, and allows human use at levels that do not result in long-term ecological degradation” Ecosystem: -energy and nutrient processing system with physical structure ...
Dec 6 - University of San Diego
... Population usually much higher or much lower than carrying capacity ...
... Population usually much higher or much lower than carrying capacity ...
Origin of species
... previously dominant groups may perish, changing the course of evolution Dinosaurs went extinct, mammals began their radiation Rates of speciation after an extinction may take about 10 my Takes time for: Ecosystems to recover Processes of speciation and adaptive diversification to begin ...
... previously dominant groups may perish, changing the course of evolution Dinosaurs went extinct, mammals began their radiation Rates of speciation after an extinction may take about 10 my Takes time for: Ecosystems to recover Processes of speciation and adaptive diversification to begin ...
Commensalism
... Commensalism • a class of relationship between two organisms where one organism benefits but the other is unaffected. ...
... Commensalism • a class of relationship between two organisms where one organism benefits but the other is unaffected. ...
Carrying Capacity of Ecosystems
... than are born (death rate > birth rate). As prey populations drop, predators begin to starve, increasing the death rate of the predator population (death rate > birth rate). Populations of herbivores and plants cycle in this same manner. ...
... than are born (death rate > birth rate). As prey populations drop, predators begin to starve, increasing the death rate of the predator population (death rate > birth rate). Populations of herbivores and plants cycle in this same manner. ...
Study Guide Unit 6
... Biodiversity This APES unit will culminate your learning of the essential APES-related ecology with the study of biodiversity and the loss biodiversity which along with global warming and ozone depletion constitute the three most significant present-day global environmental changes that are direct c ...
... Biodiversity This APES unit will culminate your learning of the essential APES-related ecology with the study of biodiversity and the loss biodiversity which along with global warming and ozone depletion constitute the three most significant present-day global environmental changes that are direct c ...
Supporting native fish - Natural Resources South Australia
... southern Purple-spotted Gudgeon. A number of factors jeopardise the survival of native fish. The introduction of exotic species, and modification and destruction of aquatic habitat have led to a decline in the distribution and abundance of native fish since European settlement. Alarmingly, around 8% ...
... southern Purple-spotted Gudgeon. A number of factors jeopardise the survival of native fish. The introduction of exotic species, and modification and destruction of aquatic habitat have led to a decline in the distribution and abundance of native fish since European settlement. Alarmingly, around 8% ...
Timber Production and Biological Diversity
... can be independently audited for environmental, social and economic management. Forest biological diversity is defined as the variability that occurs among forest-living organisms and the ecological processes they are part of; this includes diversity in forests within species, between species and of ...
... can be independently audited for environmental, social and economic management. Forest biological diversity is defined as the variability that occurs among forest-living organisms and the ecological processes they are part of; this includes diversity in forests within species, between species and of ...
the NEFMC Glossary
... physical, chemical, or biological alterations of the waters or substrate and loss of, or injury to, benthic organisms, prey species and their habitat, and other ecosystem components if such modifications reduce the quality and or quantity of EFH. Adverse effects to EFH may result from actions occurr ...
... physical, chemical, or biological alterations of the waters or substrate and loss of, or injury to, benthic organisms, prey species and their habitat, and other ecosystem components if such modifications reduce the quality and or quantity of EFH. Adverse effects to EFH may result from actions occurr ...
Sustaining Aquatic Biodiversity - Zamorascience
... Natural capital degradation: this graph illustrates the collapse of the cod fishery in the northwest Atlantic off the Canadian coast. Beginning in the late 1950s, fishers used bottom trawlers to capture more of the stock, reflected in the sharp rise in this graph. This resulted in extreme overexploi ...
... Natural capital degradation: this graph illustrates the collapse of the cod fishery in the northwest Atlantic off the Canadian coast. Beginning in the late 1950s, fishers used bottom trawlers to capture more of the stock, reflected in the sharp rise in this graph. This resulted in extreme overexploi ...
Carrying Capacity, Exponential Growth, and Resource Wars
... planet, on which the human population is destroying natural systems (its ecological life support system) at an unprecedented rate, be eager to continue exponential growth in both population and per capita resource consumption? Why, when half the world’s population has inadequate food, shelter, educa ...
... planet, on which the human population is destroying natural systems (its ecological life support system) at an unprecedented rate, be eager to continue exponential growth in both population and per capita resource consumption? Why, when half the world’s population has inadequate food, shelter, educa ...
Lecture Biodiversity..
... was carrying several thousand tons of oil products such as diesel and lubricants. At least 250 containers from the damaged vessel fell off and port officials were trying to salvage them ...
... was carrying several thousand tons of oil products such as diesel and lubricants. At least 250 containers from the damaged vessel fell off and port officials were trying to salvage them ...
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.