The Norwegian Nature Index - Science for the Environment 2015
... goal C: To improve the status of biodiversity by safeguarding ecosystems, species and genetic diversity Aichi Indicators possible to calculate using the NI methodology target ...
... goal C: To improve the status of biodiversity by safeguarding ecosystems, species and genetic diversity Aichi Indicators possible to calculate using the NI methodology target ...
Geographical assemblages of European raptors and owls
... species could be delimited in geographic assemblages Europe-wide, we used cluster analysis based on presence– absence data. This methodology is robust for delineating large-scale biogeographical regions, it is easy to apply and follows the aim of classical biogeography (Proches, 2005). Hierarchical ...
... species could be delimited in geographic assemblages Europe-wide, we used cluster analysis based on presence– absence data. This methodology is robust for delineating large-scale biogeographical regions, it is easy to apply and follows the aim of classical biogeography (Proches, 2005). Hierarchical ...
Biodiversity Section 1 A World Rich in Biodiversity Biodiversity
... • About one quarter of the drugs prescribed in the United Sates are derived from plants, and almost all of the antibiotics are derived from chemicals found in fungi. • New chemicals and industrial materials may be developed from chemicals discovered in all kinds of species. • The scientific communit ...
... • About one quarter of the drugs prescribed in the United Sates are derived from plants, and almost all of the antibiotics are derived from chemicals found in fungi. • New chemicals and industrial materials may be developed from chemicals discovered in all kinds of species. • The scientific communit ...
Biodiversity Section 1
... • About one quarter of the drugs prescribed in the United Sates are derived from plants, and almost all of the antibiotics are derived from chemicals found in fungi. • New chemicals and industrial materials may be developed from chemicals discovered in all kinds of species. • The scientific communit ...
... • About one quarter of the drugs prescribed in the United Sates are derived from plants, and almost all of the antibiotics are derived from chemicals found in fungi. • New chemicals and industrial materials may be developed from chemicals discovered in all kinds of species. • The scientific communit ...
Chapter 10 Notes Cornell
... Large populations that adapt easily to many habitats are not likely to become extinct. However, small populations in limited areas can easily become extinct. Species that are especially at risk of extinction are those that migrate, those that need large or special habitats, and those that are exploi ...
... Large populations that adapt easily to many habitats are not likely to become extinct. However, small populations in limited areas can easily become extinct. Species that are especially at risk of extinction are those that migrate, those that need large or special habitats, and those that are exploi ...
Chapter 18 - OurTeachersPage.com
... Describe the advantages and disadvantages of protecting a single large area versus several small areas. (2 points) The advantage of protecting a single large area is that the area will have more species because they support larger populations of each species, which makes them less susceptible to ext ...
... Describe the advantages and disadvantages of protecting a single large area versus several small areas. (2 points) The advantage of protecting a single large area is that the area will have more species because they support larger populations of each species, which makes them less susceptible to ext ...
Are we in the midst of the sixth mass extinction? A view from the
... caecilians do not occur outside the tropical zone, frogs extend northward even into the Arctic zone and southward to the southern tips of Africa and South America. Salamanders are mainly residents of the North Temperate zone, but one subclade (Bolitoglossini) of the largest family (Plethodontidae) o ...
... caecilians do not occur outside the tropical zone, frogs extend northward even into the Arctic zone and southward to the southern tips of Africa and South America. Salamanders are mainly residents of the North Temperate zone, but one subclade (Bolitoglossini) of the largest family (Plethodontidae) o ...
Ecosystems - physicslocker.com
... Effects of environmental change Animals are adapted to suit their environment, helping them survive and reproduce. However if the environment changes they may no longer have this advantage. A change in environment can cause extinction. Extinction is when the last individual of a species dies. When ...
... Effects of environmental change Animals are adapted to suit their environment, helping them survive and reproduce. However if the environment changes they may no longer have this advantage. A change in environment can cause extinction. Extinction is when the last individual of a species dies. When ...
Photosynthesis - Cloudfront.net
... Considers all aspects of biodiversity General goal is conserving natural resources for this and future generations Primary goal is the management of biodiversity for sustainable use by humans ...
... Considers all aspects of biodiversity General goal is conserving natural resources for this and future generations Primary goal is the management of biodiversity for sustainable use by humans ...
Biodiversity of Life
... 3. Many plants could not exist w/out animals to pollinate for them and carry their seeds. ...
... 3. Many plants could not exist w/out animals to pollinate for them and carry their seeds. ...
Examining the Extinction of the Pleistocene Megafauna
... competition with a superior species, inability to migrate to a more suitable habitat, and extremely rapid environmental change (impossibility of evolutionary adaptation) will all cause extinction of a species (Guilday 1967). These problems are magnified in shrinking habitats and will force the extin ...
... competition with a superior species, inability to migrate to a more suitable habitat, and extremely rapid environmental change (impossibility of evolutionary adaptation) will all cause extinction of a species (Guilday 1967). These problems are magnified in shrinking habitats and will force the extin ...
Darwin`s bridge between microevolution and
... required to replace themselves in the next generation; third, that limited resources create a “struggle for existence” that regulates population size, such that most offspring die without reproducing; and fourth, that the individuals that survive and reproduce are, on average, by virtue of their ind ...
... required to replace themselves in the next generation; third, that limited resources create a “struggle for existence” that regulates population size, such that most offspring die without reproducing; and fourth, that the individuals that survive and reproduce are, on average, by virtue of their ind ...
Endangered species
... • Large numbers of humans use resources wild species need • Even if each person uses small amounts of resources ...
... • Large numbers of humans use resources wild species need • Even if each person uses small amounts of resources ...
Population dynamics
... • Which populations are more likely to persist? why? Disappear? • What are the factors most important in determining a population’s likelihood to persist? • Which populations, if they disappear, are most likely to be recolonized? ...
... • Which populations are more likely to persist? why? Disappear? • What are the factors most important in determining a population’s likelihood to persist? • Which populations, if they disappear, are most likely to be recolonized? ...
Conservation Biology and Global Change
... Since 1900, 123 freshwater animal species have become extinct in North America, and hundreds more are threatened. The extinction rate for North American freshwater fauna is about five times as high as that for terrestrial animals. Of all known amphibian species, 32% are either very near extinction o ...
... Since 1900, 123 freshwater animal species have become extinct in North America, and hundreds more are threatened. The extinction rate for North American freshwater fauna is about five times as high as that for terrestrial animals. Of all known amphibian species, 32% are either very near extinction o ...
The species-pool hypothesis
... that there are mechanisms working which reduce species richness in communities. These mechanisms can be divided into three groups; first there is the simple lack of traits which disables species to live in a community. Secondly, there can be limitations on dispersal and immigration of species so the ...
... that there are mechanisms working which reduce species richness in communities. These mechanisms can be divided into three groups; first there is the simple lack of traits which disables species to live in a community. Secondly, there can be limitations on dispersal and immigration of species so the ...
What is Biodiversity?
... some other animal to eat. The seeds pass through your digestive system, with their seed coats weakened by the acid in your stomach, and fall on the ground, ...
... some other animal to eat. The seeds pass through your digestive system, with their seed coats weakened by the acid in your stomach, and fall on the ground, ...
the iucn red list of seahorses and pipefishes
... routes. Levels of offtake from wild populations are not known, and therefore the effect of catch on extinction risk cannot currently be evaluated. Coastal areas that are home to syngnathids are also at risk from threats such as pollution, sedimentation, eutrophication, and habitat disturbance throug ...
... routes. Levels of offtake from wild populations are not known, and therefore the effect of catch on extinction risk cannot currently be evaluated. Coastal areas that are home to syngnathids are also at risk from threats such as pollution, sedimentation, eutrophication, and habitat disturbance throug ...
Population Ecology Simulation
... they may reduce their reproductive rate (number of offspring per individual) or suffer an increased death rate. In some cases, exceeding carrying capacity can lead to extinction of a species. Often, exceeding the carrying capacity leads to a decline in the quality of the habitat so that when the pop ...
... they may reduce their reproductive rate (number of offspring per individual) or suffer an increased death rate. In some cases, exceeding carrying capacity can lead to extinction of a species. Often, exceeding the carrying capacity leads to a decline in the quality of the habitat so that when the pop ...
The Realized Niche
... realized niche of a species. For example, a plant, the St. John’s-wort, was introduced and became widespread in open rangeland habitats in California until a specialized beetle was introduced to control it. Populations of the plant quickly decreased and it is now only found in shady sites where the ...
... realized niche of a species. For example, a plant, the St. John’s-wort, was introduced and became widespread in open rangeland habitats in California until a specialized beetle was introduced to control it. Populations of the plant quickly decreased and it is now only found in shady sites where the ...
Last lecture! Ch 23 cont. Biodiversity
... • Interacts with production hypothesis • Relates to niche arguments (see below) ...
... • Interacts with production hypothesis • Relates to niche arguments (see below) ...
Chapter 6 Section 6_3 Biodiversity
... 1. Protecting Individual Species • The Association for Zoos and Aquariums (AZA) oversee survival plans to protect endangered species ...
... 1. Protecting Individual Species • The Association for Zoos and Aquariums (AZA) oversee survival plans to protect endangered species ...
species diversity
... Caused by receding of ice sheets and/or hunting by humans Modern extinctions 75 percent of extinction since 1600 due to human activity (e.g., habitat destruction, introduction of species) ...
... Caused by receding of ice sheets and/or hunting by humans Modern extinctions 75 percent of extinction since 1600 due to human activity (e.g., habitat destruction, introduction of species) ...
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.