Ecological effects of habitat fragmentation and edge creation
... matrix. The phenomenon is complex and largely system-specific, but some generalizations about the biological consequences of fragmentation are starting to emerge from research in conservation biology. There is generally an inverse relationship between the number of extinctions in fragments and their ...
... matrix. The phenomenon is complex and largely system-specific, but some generalizations about the biological consequences of fragmentation are starting to emerge from research in conservation biology. There is generally an inverse relationship between the number of extinctions in fragments and their ...
Kelp Forests
... IV. Kelp Beds, Sea Urchins and Predators Sea urchins are by far the most important herbivores in kelp beds ...
... IV. Kelp Beds, Sea Urchins and Predators Sea urchins are by far the most important herbivores in kelp beds ...
Interactions Among Species Ecological Niche
... for grass. Populations of consumers grow. a) Rabbit birth rates are higher than normal. More grass gets eaten, but hawks also have more to eat. ...
... for grass. Populations of consumers grow. a) Rabbit birth rates are higher than normal. More grass gets eaten, but hawks also have more to eat. ...
20150407084749
... levels are magnified at higher levels • Also-carnivores tend to be larger at successive trophic levels-can’t get enough food to meet needs ...
... levels are magnified at higher levels • Also-carnivores tend to be larger at successive trophic levels-can’t get enough food to meet needs ...
S-8-9-2_Species Interactions Quiz
... Directions: Write the name of each type of species interaction next to the example provided. Use the terms in the box below. Each term will be used one time. ...
... Directions: Write the name of each type of species interaction next to the example provided. Use the terms in the box below. Each term will be used one time. ...
biodiversity - Squarespace
... Monitoring the health of the environment: Some species can indicate a change in the environment. For example, the breeding failure among birds of prey can point to a build-up of pesticides in the system. Lichens such as those found growing on your school walls and on the trees may be sensitive indic ...
... Monitoring the health of the environment: Some species can indicate a change in the environment. For example, the breeding failure among birds of prey can point to a build-up of pesticides in the system. Lichens such as those found growing on your school walls and on the trees may be sensitive indic ...
Silver Perch (Bidyanus bidyanus)
... 3. Bidyanus bidyanus prefers fast-flowing waters, especially where there are rapids. This species migrates to spawn. Historical records show that the species was widespread and abundant in most of the Murray-Darling drainage, excluding the cool, high, upper reaches of streams on the western side of ...
... 3. Bidyanus bidyanus prefers fast-flowing waters, especially where there are rapids. This species migrates to spawn. Historical records show that the species was widespread and abundant in most of the Murray-Darling drainage, excluding the cool, high, upper reaches of streams on the western side of ...
Endangered Species (Part 1)
... lives. There are five elements that are necessary: food, water, shelter, space and an appropriate mixture of these elements. All species must have adequate habitat in order to survive. The rainforests are being destroyed at a rate of 1 acre per second which equals 50 football fields per minute. This ...
... lives. There are five elements that are necessary: food, water, shelter, space and an appropriate mixture of these elements. All species must have adequate habitat in order to survive. The rainforests are being destroyed at a rate of 1 acre per second which equals 50 football fields per minute. This ...
Business of life and physiology 1
... Competitive Exclusion Principle (CEP): no two species can have the same niche requirements and persist for a long time when resources are limited– two outcomes 1)extinction 2)niche divergence. Ecological Niche Equivalents – different habitat, same role E.G. Auk vs. penguin Factors that affect niche ...
... Competitive Exclusion Principle (CEP): no two species can have the same niche requirements and persist for a long time when resources are limited– two outcomes 1)extinction 2)niche divergence. Ecological Niche Equivalents – different habitat, same role E.G. Auk vs. penguin Factors that affect niche ...
Section1-3.31975118
... • Hot Spots-the most endangered and species-rich ecosystems. – Rapid Assessment Teams are groups of biologists that evaluate situations, make recommendations, and take emergency action to stem the loss of biodiversity in hot spot areas. ...
... • Hot Spots-the most endangered and species-rich ecosystems. – Rapid Assessment Teams are groups of biologists that evaluate situations, make recommendations, and take emergency action to stem the loss of biodiversity in hot spot areas. ...
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 ...
What might disrupt ecosystem processes? - Rawlins A
... Alien or exotic species may become established at any trophic level in the ecosystem What features do these species share in order to survive in an alien environment? ...
... Alien or exotic species may become established at any trophic level in the ecosystem What features do these species share in order to survive in an alien environment? ...
Extinction
... 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 ...
... 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 ...
File
... the population of their prey. As this occurs, the predators go without food and the predator population decreases. Predator and prey populations rise and fall in related cycles. ...
... the population of their prey. As this occurs, the predators go without food and the predator population decreases. Predator and prey populations rise and fall in related cycles. ...
Interactions Among Living Things
... the population of their prey. As this occurs, the predators go without food and the predator population decreases. Predator and prey populations rise and fall in related cycles. ...
... the population of their prey. As this occurs, the predators go without food and the predator population decreases. Predator and prey populations rise and fall in related cycles. ...
DINEEnv Science Chapter 1 Science and the Environment Section 1
... Many people also argue that all species have potential economic, scientific, aesthetics, and recreational value, so it is important to preserve them. ...
... Many people also argue that all species have potential economic, scientific, aesthetics, and recreational value, so it is important to preserve them. ...
C. Ecosystem variability and communities
... Historical Abundance Captain John Smith describing tributaries of the Chesapeake in 1608: “… in diverse places that abundance of fish lying so thicke with their heads above the water, as for want of nets we attempted to catch them with a frying pan, but we found it a bad instrument to catch fis ...
... Historical Abundance Captain John Smith describing tributaries of the Chesapeake in 1608: “… in diverse places that abundance of fish lying so thicke with their heads above the water, as for want of nets we attempted to catch them with a frying pan, but we found it a bad instrument to catch fis ...
U.S. Fish and Wildlife Service
... 4. Inadequacy of existing regulatory mechanisms 5. Other natural or man-made factors affecting the continued existence of the species ...
... 4. Inadequacy of existing regulatory mechanisms 5. Other natural or man-made factors affecting the continued existence of the species ...
Biodiversity - Madison County Schools
... resources and are dependent on each other for food and shelter. Some species are the center stone of their ecosystem. These keystone species are species that influence the survival of many other species in an ecosystem 1800 sea otter extinction ...
... resources and are dependent on each other for food and shelter. Some species are the center stone of their ecosystem. These keystone species are species that influence the survival of many other species in an ecosystem 1800 sea otter extinction ...
Biodiversity - Alexander College
... Research source: Krebs, Charles J. Ecology, 6th ed. Pearson: San Francisco, 2009. ...
... Research source: Krebs, Charles J. Ecology, 6th ed. Pearson: San Francisco, 2009. ...
Progress with Assessment of Data-Limited Stocks
... CFP beyond UNCLOS • Article 4.1 (9) 'ecosystem-based approach to fisheries management' means an integrated approach to managing fisheries within ecologically meaningful boundaries which seeks to manage the use of natural resources, taking account of fishing and other human activities, while preserv ...
... CFP beyond UNCLOS • Article 4.1 (9) 'ecosystem-based approach to fisheries management' means an integrated approach to managing fisheries within ecologically meaningful boundaries which seeks to manage the use of natural resources, taking account of fishing and other human activities, while preserv ...
Chapter 9 Lecture Student Version Part 2
... Prevention Is the Best Way to Reduce Threats from Invasive Species • Research programs identifying invaders • Establishing international treaties banning transfer between countries • Public education about exotic pets and plants • What else can be done to prevent invasive species? ...
... Prevention Is the Best Way to Reduce Threats from Invasive Species • Research programs identifying invaders • Establishing international treaties banning transfer between countries • Public education about exotic pets and plants • What else can be done to prevent invasive species? ...
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.