Humans in the Biosphere (ch 6)
... monoculture (planting of same crop year after year) which led to green revolution & an increase in world food supply • Problems Pollution from pesticides ...
... monoculture (planting of same crop year after year) which led to green revolution & an increase in world food supply • Problems Pollution from pesticides ...
Part 7 slides
... Learning Targets 20. Explain how habitat destruction, invasive species, and overexploitation lead to a loss of species. ...
... Learning Targets 20. Explain how habitat destruction, invasive species, and overexploitation lead to a loss of species. ...
APES Focus/Ch - cynthiaahmed
... How many species have been named to date? What is the largest group contributing to this number? ...
... How many species have been named to date? What is the largest group contributing to this number? ...
APES Focus/Ch - cynthiaahmed
... How many species have been named to date? What is the largest group contributing to this number? ...
... How many species have been named to date? What is the largest group contributing to this number? ...
Impacts of Invasive Alien Plants
... Invasive Alien Species Programme Ezemvelo 23 July 2015 By: Z. Jele ...
... Invasive Alien Species Programme Ezemvelo 23 July 2015 By: Z. Jele ...
PPT
... • 800 spp. of snails have evolved in Hawaii islands. • Rosy Wolf-Snail introduced to control Giant African Snail. • 50-75% of native land snails extinct. Simberloff, D., and P. Stiling. 1996. How risky is biological control? Ecology 77:1965-1974. ...
... • 800 spp. of snails have evolved in Hawaii islands. • Rosy Wolf-Snail introduced to control Giant African Snail. • 50-75% of native land snails extinct. Simberloff, D., and P. Stiling. 1996. How risky is biological control? Ecology 77:1965-1974. ...
Chapter 56 Guided Notes Concept 56.1: Human activities threaten
... % of wetlands in the contiguous United States have been drained and converted to other ecosystems Benefits of Species and Genetic Diversity • In the United States, % of prescriptions contain substances originally derived from plants • For example, the rosy periwinkle contains alkaloids that inhibit ...
... % of wetlands in the contiguous United States have been drained and converted to other ecosystems Benefits of Species and Genetic Diversity • In the United States, % of prescriptions contain substances originally derived from plants • For example, the rosy periwinkle contains alkaloids that inhibit ...
Biodiversity Holds the Key to Sustainable Biofuel Production
... The authors found that the year-to-year stability of the ecosystem was significantly greater at higher plant diversity levels and tended to increase as systems matured. Ecosystem stability was also positively dependant on root mass. The time period of the study allowed researchers to evaluate the av ...
... The authors found that the year-to-year stability of the ecosystem was significantly greater at higher plant diversity levels and tended to increase as systems matured. Ecosystem stability was also positively dependant on root mass. The time period of the study allowed researchers to evaluate the av ...
Biodiversity - Alexander College
... • Biodiversity is the scientific term coined to describe the variety and diversity of organisms in a given ecosystem. • There are many different kinds of biological organisms in different ecosystems. • E.g., a tropical rainforest ecosystem may contain thousands of different species of animals, plan ...
... • Biodiversity is the scientific term coined to describe the variety and diversity of organisms in a given ecosystem. • There are many different kinds of biological organisms in different ecosystems. • E.g., a tropical rainforest ecosystem may contain thousands of different species of animals, plan ...
Biodiversity
... that interact in a specific area or ecosystem • Dominant Species: so abundant, biggest biomass of any community member – In terrestrial ecosystems dominant species are always primary producers – Removal of a dominant species can result in lower biodiversity ...
... that interact in a specific area or ecosystem • Dominant Species: so abundant, biggest biomass of any community member – In terrestrial ecosystems dominant species are always primary producers – Removal of a dominant species can result in lower biodiversity ...
Biodiversity
... harmful substance increase at higher trophic levels in a food chain or food web. ...
... harmful substance increase at higher trophic levels in a food chain or food web. ...
GO 1_1Examing Biological Diveristy
... have the same structure and can reproduce with each other. • Of the 30 - 100 million possible different species of living things, there are over 1.5 million species of animals and 350.000 species of plants that have been identified by biologists. • The most successful life form seems to be the insec ...
... have the same structure and can reproduce with each other. • Of the 30 - 100 million possible different species of living things, there are over 1.5 million species of animals and 350.000 species of plants that have been identified by biologists. • The most successful life form seems to be the insec ...
Unit 3: Evolution, Biodiversity, Climate, Weather, and Biomes
... Large adapted stomachs with unique microorganisms to help ...
... Large adapted stomachs with unique microorganisms to help ...
The Loss of Biodiversity
... threats to species • The largest threat is human development and habitat loss • The second largest threat to species diversity is invasive species • Overharvesting and bycatch is the third largest threat to species ...
... threats to species • The largest threat is human development and habitat loss • The second largest threat to species diversity is invasive species • Overharvesting and bycatch is the third largest threat to species ...
Further Reading
... species, populations to ecosystems. The earth sustains millions of different species, many of which have not yet been discovered. According to the United Nations Convention on Biodiversity, which was adopted at the 1992 Earth Summit in Rio de Janeiro as an important component of sustainable developm ...
... species, populations to ecosystems. The earth sustains millions of different species, many of which have not yet been discovered. According to the United Nations Convention on Biodiversity, which was adopted at the 1992 Earth Summit in Rio de Janeiro as an important component of sustainable developm ...
Biodiversity Loss
... • As population grows, landscape changes • Settlements are growing into megacities • Land uses are changed • Rivers are dammed or diverted • Modern agriculture & forestry techniques displace plants ...
... • As population grows, landscape changes • Settlements are growing into megacities • Land uses are changed • Rivers are dammed or diverted • Modern agriculture & forestry techniques displace plants ...
biodiversity
... _________________ diversity refers to the variety of species within a region. Such diversity can be measured in many ways, and scientists have not settled on a single best method. The number of species in a region -- its species "richness" -- is one often- used measure, but a more precise measuremen ...
... _________________ diversity refers to the variety of species within a region. Such diversity can be measured in many ways, and scientists have not settled on a single best method. The number of species in a region -- its species "richness" -- is one often- used measure, but a more precise measuremen ...
Alien species threaten Indian ecosystems
... NEW DELHI: Invasive alien species like Lantana and Cuscutta pose a threat to the ecosystems and lead to loss of biodiversity of the country, the government today said. Invasive alien species are plants, animals, pathogens and other organisms that are non-native to an ecosystem and which may cause ec ...
... NEW DELHI: Invasive alien species like Lantana and Cuscutta pose a threat to the ecosystems and lead to loss of biodiversity of the country, the government today said. Invasive alien species are plants, animals, pathogens and other organisms that are non-native to an ecosystem and which may cause ec ...
4.1.1 Biodiversity
... • How does diversity change during succession? • How does habitat diversity influence species diversity and genetic diversity? • How does ecosystem complexity, with its variety of nutrient and energy pathways, provide stability? • How do human activities (agriculture, mining, logging, etc.) modify ...
... • How does diversity change during succession? • How does habitat diversity influence species diversity and genetic diversity? • How does ecosystem complexity, with its variety of nutrient and energy pathways, provide stability? • How do human activities (agriculture, mining, logging, etc.) modify ...
Conservation and Restoration
... II. Human Activities Threatens Earth’s Biodiversity Rate of extinction underlies the biodiversity crisis A. The Three Levels of Biodiversity 1. Genetic Diversity a) genetic variation within and b/w populations b) if one population becomes extinct then a species may have lost some of the genetic di ...
... II. Human Activities Threatens Earth’s Biodiversity Rate of extinction underlies the biodiversity crisis A. The Three Levels of Biodiversity 1. Genetic Diversity a) genetic variation within and b/w populations b) if one population becomes extinct then a species may have lost some of the genetic di ...
Environmental Science Chapter 10 Study Guide Genetic Diversity
... 4. __Biodiversity___ is important to ecosystems because it helps populations adapt to ecological changes. (10.1) 5. _Species diversity_ is usually referred to as biodiversity. (10.1) 6. Benefits of biodiversity: a _variety__ of food sources, sources of new medicines__, and aesthetic or _personal enj ...
... 4. __Biodiversity___ is important to ecosystems because it helps populations adapt to ecological changes. (10.1) 5. _Species diversity_ is usually referred to as biodiversity. (10.1) 6. Benefits of biodiversity: a _variety__ of food sources, sources of new medicines__, and aesthetic or _personal enj ...
Importance of Biodiversity
... Biodiversity also has value in its own right, and is not something that should simply be viewed for its usefulness to humans. Human responsibility toward other living things, and obligations to future generations, provide strong reasons for conservation. ...
... Biodiversity also has value in its own right, and is not something that should simply be viewed for its usefulness to humans. Human responsibility toward other living things, and obligations to future generations, provide strong reasons for conservation. ...
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.