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Biodiversity
... species (pi) is calculated, and then multiplied by the natural logarithm of this proportion (lnpi). ...
... species (pi) is calculated, and then multiplied by the natural logarithm of this proportion (lnpi). ...
Biodiversity, Species Interactions and Population Control
... ◦ Age structure diagrams can also be used to describe organism populations ◦ -identify if population is growing, stable or declining ...
... ◦ Age structure diagrams can also be used to describe organism populations ◦ -identify if population is growing, stable or declining ...
Extinct
... low 'background rate', usually matched by the rate at which new species appear - resulting in an overall increase in biodiversity Imagine a world without extinction -it would be really crowded!! ...
... low 'background rate', usually matched by the rate at which new species appear - resulting in an overall increase in biodiversity Imagine a world without extinction -it would be really crowded!! ...
Human Impact on Resources and Ecosystems
... Introduction of exotic species that disrupt ecosystems and compete or prey on native organisms. Purposeful killing of pest organisms. organisms ...
... Introduction of exotic species that disrupt ecosystems and compete or prey on native organisms. Purposeful killing of pest organisms. organisms ...
i3157e02
... Habitat loss occurs when natural environments are transformed or modified to serve human needs. It is the most significant cause of biodiversity loss globally. Common types of habitat loss include cutting down forests for timber and opening up land for agriculture, draining wetlands to make way for ...
... Habitat loss occurs when natural environments are transformed or modified to serve human needs. It is the most significant cause of biodiversity loss globally. Common types of habitat loss include cutting down forests for timber and opening up land for agriculture, draining wetlands to make way for ...
areading 10
... whether one or more wolf populations will begin preying on livestock. (Note: Studies have shown that there is little evidence to support the claim that wolves are responsible for killing large numbers of livestock.) 17. No; we do not fully understand what effects we are having on the environment whe ...
... whether one or more wolf populations will begin preying on livestock. (Note: Studies have shown that there is little evidence to support the claim that wolves are responsible for killing large numbers of livestock.) 17. No; we do not fully understand what effects we are having on the environment whe ...
Biodiversity Under Threat
... • Due to several 100 years of intense human activity the global pattern of biodiversity is no longer ‘natural’. • Humans can have both positive and negative influences on biodiversity • Norman Myers coined the terms ‘biodiversity hotspot’ • Hotspots are areas with: High species richness High levels ...
... • Due to several 100 years of intense human activity the global pattern of biodiversity is no longer ‘natural’. • Humans can have both positive and negative influences on biodiversity • Norman Myers coined the terms ‘biodiversity hotspot’ • Hotspots are areas with: High species richness High levels ...
Topic 3: Biodiversity Under Threat - School
... • Due to several 100 years of intense human activity the global pattern of biodiversity is no longer ‘natural’. • Humans can have both positive and negative influences on biodiversity • Norman Myers coined the terms ‘biodiversity hotspot’ • Hotspots are areas with: High species richness High levels ...
... • Due to several 100 years of intense human activity the global pattern of biodiversity is no longer ‘natural’. • Humans can have both positive and negative influences on biodiversity • Norman Myers coined the terms ‘biodiversity hotspot’ • Hotspots are areas with: High species richness High levels ...
Support and guidance - Unit 3, topic 3: Biodiversity Under
... • Due to several 100 years of intense human activity the global pattern of biodiversity is no longer ‘natural’. • Humans can have both positive and negative influences on biodiversity • Norman Myers coined the terms ‘biodiversity hotspot’ • Hotspots are areas with: High species richness High levels ...
... • Due to several 100 years of intense human activity the global pattern of biodiversity is no longer ‘natural’. • Humans can have both positive and negative influences on biodiversity • Norman Myers coined the terms ‘biodiversity hotspot’ • Hotspots are areas with: High species richness High levels ...
ENVI 30 Environmental Issues
... Increase area 10X Increase species 2X Estimate rate at which ecosystem area is being reduced Calculate extinction rate based on predicted reduction in species richness from reduction in habitat area Current estimates ~ 17,500 species year-1 ...
... Increase area 10X Increase species 2X Estimate rate at which ecosystem area is being reduced Calculate extinction rate based on predicted reduction in species richness from reduction in habitat area Current estimates ~ 17,500 species year-1 ...
Fact Sheet - Biodiversity - Macedon Ranges Shire Council
... Authority, works to engage landowners and the broader community in restoring the streamside vegetation (or riparian zone) along the whole length of the Campaspe River. Activities include fencing, woody weed control, willow removal, revegetation and community engagement through programs such as Water ...
... Authority, works to engage landowners and the broader community in restoring the streamside vegetation (or riparian zone) along the whole length of the Campaspe River. Activities include fencing, woody weed control, willow removal, revegetation and community engagement through programs such as Water ...
Diversity1
... Extinction versus identification • If extinction rates are as high as 5% per decade, then regardless of how many species exist on Earth, more than half will be extinct within 150 years, 2164 • At the rates considered more realistic (i.e., <1% per decade) the rate of species description greatly outp ...
... Extinction versus identification • If extinction rates are as high as 5% per decade, then regardless of how many species exist on Earth, more than half will be extinct within 150 years, 2164 • At the rates considered more realistic (i.e., <1% per decade) the rate of species description greatly outp ...
ES Chapter 4 modified
... of a population over time. Theory of evolution: Life comes from life. All species descended from ancestral species. Microevolution: occurs on a genetic level. Mutations are either advantageous or deleterious. Macroevolution: Successive changes over generations of a population. ...
... of a population over time. Theory of evolution: Life comes from life. All species descended from ancestral species. Microevolution: occurs on a genetic level. Mutations are either advantageous or deleterious. Macroevolution: Successive changes over generations of a population. ...
Interactions between Individual Substrate Type and Macrofauna
... pore-water content, temperature, food availability, sedimentation rate, substrate consistency, turbidity, and predation found in a particular environment sediment characteristics define what organisms can survive in the environment Biodiversity: describes the sum total variation of life forms in ...
... pore-water content, temperature, food availability, sedimentation rate, substrate consistency, turbidity, and predation found in a particular environment sediment characteristics define what organisms can survive in the environment Biodiversity: describes the sum total variation of life forms in ...
Queensland`s Bioregions
... the natural variety of native wildlife, together with the environmental conditions necessary for their survival, and includes: •the diversity of landscape components in a region; •the diversity of different community types formed by living organisms, and the relationships between them; •the diversit ...
... the natural variety of native wildlife, together with the environmental conditions necessary for their survival, and includes: •the diversity of landscape components in a region; •the diversity of different community types formed by living organisms, and the relationships between them; •the diversit ...
Warren Austin and Cory Soltys Aquatic Biodiversity
... THE IMPORTANCE OF BIODIVERSITY • UTILITARIAN VALUES-MEDICINAL USE OF PLANTS, AGRICULTURAL GENE STOCKS, AND FISHING • INDIRECT UTILITARIAN VALUES-ECOSYSTEM SERVICES SUCH AS AIR QUALITY AND CLIMATE AMELIORATION • BIOGEOCHEMICAL CYCLES • PHOTOSYNTHESIS AND CELLULAR RESPIRATION (OXYGEN) • CLEANING WAT ...
... THE IMPORTANCE OF BIODIVERSITY • UTILITARIAN VALUES-MEDICINAL USE OF PLANTS, AGRICULTURAL GENE STOCKS, AND FISHING • INDIRECT UTILITARIAN VALUES-ECOSYSTEM SERVICES SUCH AS AIR QUALITY AND CLIMATE AMELIORATION • BIOGEOCHEMICAL CYCLES • PHOTOSYNTHESIS AND CELLULAR RESPIRATION (OXYGEN) • CLEANING WAT ...
chapter-7-powerpoint
... The Number of Species on Earth • No one knows the exact number • About 1.4 million – 1.8 million species have been identified and named • Insects and plants make up most of these species • Number will increase ...
... The Number of Species on Earth • No one knows the exact number • About 1.4 million – 1.8 million species have been identified and named • Insects and plants make up most of these species • Number will increase ...
Apr7a
... If keystone species reduce likelihood of competitive exclusion, their activities would increase the number of species that could coexist in communities. Food Web Structure, Species Diversity and Intertidal Organisms (Fig. 17.6) As species richness increases, proportion of the web represented by pred ...
... If keystone species reduce likelihood of competitive exclusion, their activities would increase the number of species that could coexist in communities. Food Web Structure, Species Diversity and Intertidal Organisms (Fig. 17.6) As species richness increases, proportion of the web represented by pred ...
Biodiversity in a Changing World
... Areas of endemism • A species is endemic to a certain region if its distribution is restricted to that region • Endemism contributes to the uniqueness and special importance of the biodiversity in particular areas. • Some areas of the world have particularly high levels of endemism ...
... Areas of endemism • A species is endemic to a certain region if its distribution is restricted to that region • Endemism contributes to the uniqueness and special importance of the biodiversity in particular areas. • Some areas of the world have particularly high levels of endemism ...
CH 4 Biodiversity
... marine species became extinct 374 MYA (Late Devonian) ~ 70-80% of marine species became extinct 251 MYA (end of the Permian) ~ 90% of all species became extinct, perhaps 99% of all animals Greatest mass extinction in history 200 MYA (end of the Triassic) most ammonites, half the genera of biva ...
... marine species became extinct 374 MYA (Late Devonian) ~ 70-80% of marine species became extinct 251 MYA (end of the Permian) ~ 90% of all species became extinct, perhaps 99% of all animals Greatest mass extinction in history 200 MYA (end of the Triassic) most ammonites, half the genera of biva ...
Africa Biodiversity PPT
... medium sized prey. The downward trend has been most pronounced since 1980, which covers the period when there was a substantial increase of young trees. Thus, plant structure indirectly affects predator functional responses and thereby herbivore numbers. ...
... medium sized prey. The downward trend has been most pronounced since 1980, which covers the period when there was a substantial increase of young trees. Thus, plant structure indirectly affects predator functional responses and thereby herbivore numbers. ...
Document
... 11-2 How Can We Protect and Sustain Marine Biodiversity? Concept 11-2 We can help to sustain marine biodiversity by using laws and economic incentives to protect species, setting aside marine reserves to protect ecosystems, and using community-based integrated coastal ...
... 11-2 How Can We Protect and Sustain Marine Biodiversity? Concept 11-2 We can help to sustain marine biodiversity by using laws and economic incentives to protect species, setting aside marine reserves to protect ecosystems, and using community-based integrated coastal ...
Biomes and Ecological Succession Test Review Ecological
... 5. What are some plant characteristics that are common to pioneer species? ...
... 5. What are some plant characteristics that are common to pioneer species? ...
Biodiversity
Global Biodiversity is the variety of different types of life found on Earth and the variations within species. It is a measure of the variety of organisms present in different ecosystems. This can refer to genetic variation, ecosystem variation, or species variation (number of species) within an area, biome, or planet. Terrestrial biodiversity tends to be highest near the equator, which seems to be the result of the warm climate and high primary productivity. Biodiversity is not distributed evenly on Earth. It is the richest in the tropics. Marine biodiversity tends to be highest along coasts in the Western Pacific, where sea surface temperature is highest and in the mid-latitudinal band in all oceans. There are latitudinal gradients in species diversity. Biodiversity generally tends to cluster in hotspots, and has been increasing through time but will be likely to slow in the future.The number and variety of plants, animals and other organisms that exist is known as biodiversity. It is an essential component of nature and it ensures the survival of human species by providing food, fuel, shelter, medicines and other resources to mankind. The richness of biodiversity depends on the climatic conditions and area of the region. All species of plants taken together are known as flora and about 70,000 species of plants are known till date. All species of animals taken together are known as fauna which includes birds, mammals, fish, reptiles, insects, crustaceans, molluscs, etc.Rapid environmental changes typically cause mass extinctions. 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. The total amount of related DNA base pairs on Earth is estimated at 5.0 x 1037, and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).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. Since life began on Earth, five major mass extinctions and several minor events have led to large and sudden drops in biodiversity. The Phanerozoic eon (the last 540 million years) marked a rapid growth in biodiversity via the Cambrian explosion—a period during which the majority of multicellular phyla first appeared. The next 400 million years included repeated, massive biodiversity losses classified as mass extinction events. In the Carboniferous, rainforest collapse led to a great loss of plant and animal life. The Permian–Triassic extinction event, 251 million years ago, was the worst; vertebrate recovery took 30 million years. The most recent, the Cretaceous–Paleogene extinction event, occurred 65 million years ago and has often attracted more attention than others because it resulted in the extinction of the dinosaurs.The period since the emergence of humans has displayed an ongoing biodiversity reduction and an accompanying loss of genetic diversity. Named the Holocene extinction, the reduction is caused primarily by human impacts, particularly habitat destruction. Conversely, biodiversity impacts human health in a number of ways, both positively and negatively.The United Nations designated 2011–2020 as the United Nations Decade on Biodiversity.