Red Wolf Reintroduction Debate
... proven to be a great success, and there are many other examples like this. ...
... proven to be a great success, and there are many other examples like this. ...
“Evolution and Biodiversity: The evolutionary basis of biodiversity
... adaptive capacities of organisms to changing environments. The mechanisms to understand how fast and effective organisms could deal with it by adaptation and selection is still poorly understood. Especially epigenetic changes in natural (!) populations that result in different evolutionary potential ...
... adaptive capacities of organisms to changing environments. The mechanisms to understand how fast and effective organisms could deal with it by adaptation and selection is still poorly understood. Especially epigenetic changes in natural (!) populations that result in different evolutionary potential ...
Forms of biological diversity - Chris Elphick
... intricate ecosystems they help build into the living environment”. Does this definition miss anything important? ii) According to the UN (1992, in the Convention on Biological Diversity), biodiversity is: “the variability among living organisms from all sources including … terrestrial, marine, and o ...
... intricate ecosystems they help build into the living environment”. Does this definition miss anything important? ii) According to the UN (1992, in the Convention on Biological Diversity), biodiversity is: “the variability among living organisms from all sources including … terrestrial, marine, and o ...
Chapter 6 Humans in the Biosphere
... Genetic diversity – sum total of all the different forms of genetic information carried by all organisms on Earth today One of earth’s greatest natural resources is biodiversity Provide us with food , industrial products & medicines ...
... Genetic diversity – sum total of all the different forms of genetic information carried by all organisms on Earth today One of earth’s greatest natural resources is biodiversity Provide us with food , industrial products & medicines ...
Extinctions
... Extinctions have been occurring constantly at a low 'background rate', usually matched by the rate at which new species appear resulting in an overall increase in biodiversity A world without extinction would be really crowded!! ...
... Extinctions have been occurring constantly at a low 'background rate', usually matched by the rate at which new species appear resulting in an overall increase in biodiversity A world without extinction would be really crowded!! ...
Extinction & the Biodiversity Crisis
... in past 50 yrs than at any time in human history • Over last 100 yrs, human-caused species extinctions have ...
... in past 50 yrs than at any time in human history • Over last 100 yrs, human-caused species extinctions have ...
3 - School-Portal.co.uk
... (a)The species have been carried by marine trade on the hulls of ships and in bilge and ballast water and the movements tend to be between developed areas, reflecting trade patterns. Some areas are not involved; these tend to have less trade. There may be some specific knowledge of individual specie ...
... (a)The species have been carried by marine trade on the hulls of ships and in bilge and ballast water and the movements tend to be between developed areas, reflecting trade patterns. Some areas are not involved; these tend to have less trade. There may be some specific knowledge of individual specie ...
Poster - Environmental Literacy
... •Hierarchy of systems at different scales: Biodiversity exists in 3 levels: genetic diversity at the individual and population level, species diversity at the community level, ecosystem diversity. •Structure and Function: Genetic characteristics: individual genotypes, population genetic variability, ...
... •Hierarchy of systems at different scales: Biodiversity exists in 3 levels: genetic diversity at the individual and population level, species diversity at the community level, ecosystem diversity. •Structure and Function: Genetic characteristics: individual genotypes, population genetic variability, ...
Biodiversity - Center for Sustainable Systems
... Biodiversity, or biological diversity, is the variability among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems, and the ecological complexes of which they are part.1 Biodiversity shapes the ecosystem services that contribute to human wellbeing—material ...
... Biodiversity, or biological diversity, is the variability among living organisms from all sources, including terrestrial, marine, and other aquatic ecosystems, and the ecological complexes of which they are part.1 Biodiversity shapes the ecosystem services that contribute to human wellbeing—material ...
Impacts of Climate Change on Mediterranean Biodiversity and
... On the basis of the available literature – a total of 37 eradication programmes have been recorded. Thirtythree eradications were carried out on islands and four on the mainland. The rat (Rattus spp.) has been the most common target (67%), followed by the rabbit. In many cases, these eradications de ...
... On the basis of the available literature – a total of 37 eradication programmes have been recorded. Thirtythree eradications were carried out on islands and four on the mainland. The rat (Rattus spp.) has been the most common target (67%), followed by the rabbit. In many cases, these eradications de ...
Threat to biodiversity stems mainly from: habitat fragmentation
... In modern times, the human population has increased from about 1 billion in 1900 to almost 6 billion today. Like other living beings, we use natural resources to survive, but we are far more resourceful and destructive to other life-forms than any species previously known. As the world's human popul ...
... In modern times, the human population has increased from about 1 billion in 1900 to almost 6 billion today. Like other living beings, we use natural resources to survive, but we are far more resourceful and destructive to other life-forms than any species previously known. As the world's human popul ...
Eight key directions for science in CI
... targets at species, site, and ‘scape’ levels) Direction: outcomes supply + benefits demand (climate change, ecosystem services, human wellbeing; science of changing human behavior) ...
... targets at species, site, and ‘scape’ levels) Direction: outcomes supply + benefits demand (climate change, ecosystem services, human wellbeing; science of changing human behavior) ...
ch10_lecture_PC
... • Convention on biological diversity – Focuses on conserving biological diversity worldwide – Does not yet have the support of the United States ...
... • Convention on biological diversity – Focuses on conserving biological diversity worldwide – Does not yet have the support of the United States ...
conservation
... genetic diversity within species) and of a variety of habitats and ecosystems. It carries a social and economic cost for the local community. • Preservation is the protection of areas that as yet are unused/untouched by humans ...
... genetic diversity within species) and of a variety of habitats and ecosystems. It carries a social and economic cost for the local community. • Preservation is the protection of areas that as yet are unused/untouched by humans ...
Biodiversity and Biogeography
... Where is biodiversity the highest? • Mammal Diversity – highest in the tropics • Bat diversity accounts for a large proportion of this! • Latitudinal gradients in species richness is a general trend for most terrestrial plants and animals Buckley et al 2010 ...
... Where is biodiversity the highest? • Mammal Diversity – highest in the tropics • Bat diversity accounts for a large proportion of this! • Latitudinal gradients in species richness is a general trend for most terrestrial plants and animals Buckley et al 2010 ...
Towards the Sustainable Production and Consumption of
... Elevated rates of extinction are being driven by human consumption of organic resources, especially related to tropical forest destruction[7]. While most of the species that are becoming extinct are not food species, their biomass is converted into human food when their habitat is transformed into p ...
... Elevated rates of extinction are being driven by human consumption of organic resources, especially related to tropical forest destruction[7]. While most of the species that are becoming extinct are not food species, their biomass is converted into human food when their habitat is transformed into p ...
Environmental Webquest - Bremen High School District 228
... 3. Draw and label the greenhouse effect. ...
... 3. Draw and label the greenhouse effect. ...
Presentation
... Extinction due to human activity: • Exploit minerals and resources (ex. Space) • Damage the environment (ex. As humans used fire, they burned many ecosystems) (ex. cutting down of timber damaged habitats) (ex. Farming, eat many animals and plants) ...
... Extinction due to human activity: • Exploit minerals and resources (ex. Space) • Damage the environment (ex. As humans used fire, they burned many ecosystems) (ex. cutting down of timber damaged habitats) (ex. Farming, eat many animals and plants) ...
STAR 58-61 More Evolution
... 58 A single species of squirrel evolved over time into two species, each on opposite sides of the Grand Canyon. This change was most likely due to A higher mutation rates on one side. B low genetic diversity in the initial population. C the isolation of the two groups. D differences in reproductive ...
... 58 A single species of squirrel evolved over time into two species, each on opposite sides of the Grand Canyon. This change was most likely due to A higher mutation rates on one side. B low genetic diversity in the initial population. C the isolation of the two groups. D differences in reproductive ...
Chapter 7 Powerpoint
... The Number of Species of Life on Earth • No one knows the exact number • About 1.4 million species have been identified and named • Insects and plants make up moth of these species • Number will increase ...
... The Number of Species of Life on Earth • No one knows the exact number • About 1.4 million species have been identified and named • Insects and plants make up moth of these species • Number will increase ...
lec_ppt_ch07_Biological Diversity
... The Number of Species of Life on Earth • No one knows the exact number • About 1.4 million species have been identified and named • Insects and plants make up most of these species • Number will increase ...
... The Number of Species of Life on Earth • No one knows the exact number • About 1.4 million species have been identified and named • Insects and plants make up most of these species • Number will increase ...
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.