Nonequilibrium theory
... • At low levels of disturbance, competition reduces diversity. • At intermediate levels, species that have positive effects are released from competition and can increase diversity. • At high levels, positive interactions are common and help to increase diversity. ...
... • At low levels of disturbance, competition reduces diversity. • At intermediate levels, species that have positive effects are released from competition and can increase diversity. • At high levels, positive interactions are common and help to increase diversity. ...
Importance of Conservation
... Terms of Use: This image is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license and the terms of the GNU Free Documentation License, Version 1.2 or any later version. It is attributed to Wikipedia user Marcin Klapczynski and the originall can be found here. ...
... Terms of Use: This image is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license and the terms of the GNU Free Documentation License, Version 1.2 or any later version. It is attributed to Wikipedia user Marcin Klapczynski and the originall can be found here. ...
hssv1001t_powerpres
... • Biodiversity, short for biological diversity, is the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem. • Certain areas of the planet, such as tropical rainforests, contain an extrao ...
... • Biodiversity, short for biological diversity, is the variety of organisms in a given area, the genetic variation within a population, the variety of species in a community, or the variety of communities in an ecosystem. • Certain areas of the planet, such as tropical rainforests, contain an extrao ...
Web of Life- Endangered Species Edition
... urchins lived in (it was decimated by too many urchins)? Urchin populations crashed because there was nothing to eat and not enough habitat to support the population. At the same time, other animals that rely on the kelp for food or shelter were affected. ...
... urchins lived in (it was decimated by too many urchins)? Urchin populations crashed because there was nothing to eat and not enough habitat to support the population. At the same time, other animals that rely on the kelp for food or shelter were affected. ...
Evolution and Ecology Slideshow
... cell or tissue level in an organism. The gorilla is adapted for living and feeding on the ground, while chimpanzees gather food from trees. ...
... cell or tissue level in an organism. The gorilla is adapted for living and feeding on the ground, while chimpanzees gather food from trees. ...
Concepts and Values of Biodiversity
... medication. Wild plant species have been used for medicinal purposes since before the beginning of recorded history. For example, quinine comes from the cinchona tree (used to treat malaria), digitalis from the foxglove plant (chronic heart trouble), and morphine from the poppy plant (pain relief) ...
... medication. Wild plant species have been used for medicinal purposes since before the beginning of recorded history. For example, quinine comes from the cinchona tree (used to treat malaria), digitalis from the foxglove plant (chronic heart trouble), and morphine from the poppy plant (pain relief) ...
conservation of biodiversity
... Keystone Species: Loss or addition of species causes detectable changes in ecosystem rates i.e. species make unique contribution to ecosystem functioning. Niche Complementary: Difference among species in their requirements for different resources will cause complementary interaction so that a spec ...
... Keystone Species: Loss or addition of species causes detectable changes in ecosystem rates i.e. species make unique contribution to ecosystem functioning. Niche Complementary: Difference among species in their requirements for different resources will cause complementary interaction so that a spec ...
Alien species - Glossary of key terms
... sustainable usage of biological resources, and the fair and equitable sharing of benefits arising from the use of genetic resources. Article 8h of the CBD requires all Contracting Parties “as far as possible and as appropriate, to prevent the introduction of, control or eradicate those alien species ...
... sustainable usage of biological resources, and the fair and equitable sharing of benefits arising from the use of genetic resources. Article 8h of the CBD requires all Contracting Parties “as far as possible and as appropriate, to prevent the introduction of, control or eradicate those alien species ...
Photosynthesis
... The importance of social insects as a keystone species Social insects live in colonies. There is a division of labour, where some can carryout reproduction whilst others are collecting food. The feeding of an individual involved in reproduction by those collecting the food would be an example of ki ...
... The importance of social insects as a keystone species Social insects live in colonies. There is a division of labour, where some can carryout reproduction whilst others are collecting food. The feeding of an individual involved in reproduction by those collecting the food would be an example of ki ...
6. Community Ecology new
... • A habitat is the environment in which a species normally lives. • A niche describes the particular set of abiotic and biotic conditions and resources to which an organism or population responds. • The fundamental niche describes the full range of conditions and resources in which a species could s ...
... • A habitat is the environment in which a species normally lives. • A niche describes the particular set of abiotic and biotic conditions and resources to which an organism or population responds. • The fundamental niche describes the full range of conditions and resources in which a species could s ...
the biosphere - OpenStax CNX
... and may be stocked with ready seeds of future plants. Secondary succession is also a new beginning, but one with a much quicker regrowth of organisms. ...
... and may be stocked with ready seeds of future plants. Secondary succession is also a new beginning, but one with a much quicker regrowth of organisms. ...
Life! Brought to you by biodiversity
... Why is biodiversity important? Every species, including humans, are connected and rely on each other to survive. If one piece of biodiversity disappears, other species can be harmed. It’s important to protect biodiversity so that we don’t lose any of these important pieces. • We’re all connected. Im ...
... Why is biodiversity important? Every species, including humans, are connected and rely on each other to survive. If one piece of biodiversity disappears, other species can be harmed. It’s important to protect biodiversity so that we don’t lose any of these important pieces. • We’re all connected. Im ...
Interspecies competition, habitat, and ecosystem services
... changes in availability of animals’ habitat, their food and water, leads indirectly to extinction after a more prolonged decline.(294) The combination of climate change and humans’ indirect effects can be just as deadly as straightforward extinction. For one example, nitrogen fertilizer runoff from ...
... changes in availability of animals’ habitat, their food and water, leads indirectly to extinction after a more prolonged decline.(294) The combination of climate change and humans’ indirect effects can be just as deadly as straightforward extinction. For one example, nitrogen fertilizer runoff from ...
Numerical Abundance as the Criterion for Successful Species
... perhaps a universal, phenomenon (McAtee 1936). That would not be the case if numbers alone were necessary for "success." Again, whether as a function of natural control, or not, the carrying capacity of the environment for any organism has an upper limit that apparently cannot be transgressed more t ...
... perhaps a universal, phenomenon (McAtee 1936). That would not be the case if numbers alone were necessary for "success." Again, whether as a function of natural control, or not, the carrying capacity of the environment for any organism has an upper limit that apparently cannot be transgressed more t ...
В 2. Community Processes: Species Interactions and Succession в
... energy used by, another organism (the host), usually by living on or in the host. • The parasite benefits and the host is harmed but not immediately killed ...
... energy used by, another organism (the host), usually by living on or in the host. • The parasite benefits and the host is harmed but not immediately killed ...
Chapter 41 Reading Guide: Species Interactions
... directly living in intimate contact of a symbiosis. Competition predation herbivory, symbiosis, and facilitation Describe how the symbols + and – are used to indicate interactions It describes the survival of each species, for example predation is a +/- interaction, with a positive effect for those ...
... directly living in intimate contact of a symbiosis. Competition predation herbivory, symbiosis, and facilitation Describe how the symbols + and – are used to indicate interactions It describes the survival of each species, for example predation is a +/- interaction, with a positive effect for those ...
Chapter 11
... Extinct in the Wild (EW): captive individuals survive, and/or the species has been reintroduced outside its former natural range, but the species otherwise matches the criteria for "Extinct", such that no free-living, natural population is believed to exist. "Extirpated" is a term used for localized ...
... Extinct in the Wild (EW): captive individuals survive, and/or the species has been reintroduced outside its former natural range, but the species otherwise matches the criteria for "Extinct", such that no free-living, natural population is believed to exist. "Extirpated" is a term used for localized ...
Lagomorphs
... for domestic livestock and that they may be responsible for habitat degradation. In fact, overstocking and overabundance of the selfsame domestic livestock, increasingly ...
... for domestic livestock and that they may be responsible for habitat degradation. In fact, overstocking and overabundance of the selfsame domestic livestock, increasingly ...
Biodiversity (biological diversity) is the rich variety of life on Earth
... The rapid expansion of human populations and consumption in recent decades has placed enormous stresses on natural ecosystems and species within them. Loss of and damage to habitats, over-harvesting, and introduction of non-native species to new areas are major causes of species extinction and enda ...
... The rapid expansion of human populations and consumption in recent decades has placed enormous stresses on natural ecosystems and species within them. Loss of and damage to habitats, over-harvesting, and introduction of non-native species to new areas are major causes of species extinction and enda ...
Biodiversity - University of Windsor
... year to year. A species living in a stable climate can evolve specialized adaptations to the specific climate. One which lives in an unstable or unpredictable climate must have broad tolerance limits, and, logically, broad niches. That leaves niche space for fewer species. ...
... year to year. A species living in a stable climate can evolve specialized adaptations to the specific climate. One which lives in an unstable or unpredictable climate must have broad tolerance limits, and, logically, broad niches. That leaves niche space for fewer species. ...
Ecology Packet.
... (from fertilizers, pesticides, and trash) and global climate change threaten ecosystems and life on Earth. Most often, we reduce the number of species in the area, thus decreasing biodiversity. An introduced species/exotic/non-native can exploit a new niche free of predators or competitors, thus exp ...
... (from fertilizers, pesticides, and trash) and global climate change threaten ecosystems and life on Earth. Most often, we reduce the number of species in the area, thus decreasing biodiversity. An introduced species/exotic/non-native can exploit a new niche free of predators or competitors, thus exp ...
Community interactionsGrade10
... or different species attempt to use an ecological resource in the same place at the same time. A resource is any necessity of life, such as water, nutrients, light, food, or space. Direct competition in nature often results in a winner and a loser—with the losing organism failing to survive. ...
... or different species attempt to use an ecological resource in the same place at the same time. A resource is any necessity of life, such as water, nutrients, light, food, or space. Direct competition in nature often results in a winner and a loser—with the losing organism failing to survive. ...
Drivers of Species diversity
... • As the area of habitat become smaller and fragments of habitat become more and isolated • Edge effects may reduce the suitability of the habitat • Species will be lost (increasingly randomly) from small habitat patches ...
... • As the area of habitat become smaller and fragments of habitat become more and isolated • Edge effects may reduce the suitability of the habitat • Species will be lost (increasingly randomly) from small habitat patches ...
Word
... electricity from the dams on this river? How much of the planet’s water supply is available for us to use? Where is this located? What are the have’s and have nots? How much of the reliable surface runoff are we currently using? What is the estimate of use for 2025? How much of this water world-wide ...
... electricity from the dams on this river? How much of the planet’s water supply is available for us to use? Where is this located? What are the have’s and have nots? How much of the reliable surface runoff are we currently using? What is the estimate of use for 2025? How much of this water world-wide ...
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.