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Genetic diversity
... per unit area. Includes both the number of species present and their abundance. 4. Habitat diversity = The range of different habitats or number of ecological niches per unit area in an ecosystem, community or biome. Conservation of habitat diversity usually leads to conservation of species and gene ...
... per unit area. Includes both the number of species present and their abundance. 4. Habitat diversity = The range of different habitats or number of ecological niches per unit area in an ecosystem, community or biome. Conservation of habitat diversity usually leads to conservation of species and gene ...
plant breeding and genetics
... principal factors in these evolutions: taking the geographical structuring into account, identifying bottlenecks, measuring imbalances in liaison, exploring the processes of domestication and precision on the phylogenetic organisation of complexes of species (coffee trees, palm trees). The informati ...
... principal factors in these evolutions: taking the geographical structuring into account, identifying bottlenecks, measuring imbalances in liaison, exploring the processes of domestication and precision on the phylogenetic organisation of complexes of species (coffee trees, palm trees). The informati ...
8.1.1 Competing For Resources
... adapt by occupying a different niche, or other environmental factors (i.e. temperature), this trend may change. ...
... adapt by occupying a different niche, or other environmental factors (i.e. temperature), this trend may change. ...
population ecology
... In Chapter 2, you learned that organisms depend on one another for survival. You also learned about abiotic factors and that abiotic factors affect individual organisms. How, then, might these factors affect communities and populations? ...
... In Chapter 2, you learned that organisms depend on one another for survival. You also learned about abiotic factors and that abiotic factors affect individual organisms. How, then, might these factors affect communities and populations? ...
Ch15 Student Presentation
... 6) Managed-resource protected areas -allows for sustained production of natural resources in a manner that ensures the preservation of some aspects of biodiversity -most of the national forests located in Texas ...
... 6) Managed-resource protected areas -allows for sustained production of natural resources in a manner that ensures the preservation of some aspects of biodiversity -most of the national forests located in Texas ...
Objective 4. Conservation of Biological Diversity including Forests
... Manomet and CFRU studies on late successional forests. “Biodiversity in the Working Forest” publication, “Threatened and Endangered Species In Forests of Maine” publication. Quidlines for managing vernal pools (DIF&W document) Documented training for Participant’s staff on identification, location a ...
... Manomet and CFRU studies on late successional forests. “Biodiversity in the Working Forest” publication, “Threatened and Endangered Species In Forests of Maine” publication. Quidlines for managing vernal pools (DIF&W document) Documented training for Participant’s staff on identification, location a ...
Power Point - Science Olympiad
... crucial importance • Biological diversity acts to stabilize ecosystem functioning in the face of environmental fluctuation. • Variation among species in their response to such fluctuation is an essential requirement for ecosystem stability • Climate change and other humandriven (anthropogenic) envir ...
... crucial importance • Biological diversity acts to stabilize ecosystem functioning in the face of environmental fluctuation. • Variation among species in their response to such fluctuation is an essential requirement for ecosystem stability • Climate change and other humandriven (anthropogenic) envir ...
5.1 Habitats and Niches
... Determined by abiotic factors which could make more niches. Predators (organisms that actively hunt other organisms known as prey) increase niche diversity by decreasing the population size of their prey species which allows more resources for other species in that niche. *Keystone predator is a ...
... Determined by abiotic factors which could make more niches. Predators (organisms that actively hunt other organisms known as prey) increase niche diversity by decreasing the population size of their prey species which allows more resources for other species in that niche. *Keystone predator is a ...
Levels of Biodiversity
... vertically into altitudinal belts, such as montane, alpine and nival, that have quite different ecosystems. Climatic conditions at higher elevations (e.g., low temperatures, high aridity) can create environments where relatively few species can survive. Similarly, in oceans and freshwaters there are ...
... vertically into altitudinal belts, such as montane, alpine and nival, that have quite different ecosystems. Climatic conditions at higher elevations (e.g., low temperatures, high aridity) can create environments where relatively few species can survive. Similarly, in oceans and freshwaters there are ...
No Slide Title
... homogeneous habitat with few resources or microhabitats will support fewer species than one with more • A comparison of diversities between 2 habitats of different structural complexity would be a betweenhabitat comparison • A within-habitat approach is preferable in comparing diversity between diff ...
... homogeneous habitat with few resources or microhabitats will support fewer species than one with more • A comparison of diversities between 2 habitats of different structural complexity would be a betweenhabitat comparison • A within-habitat approach is preferable in comparing diversity between diff ...
Population Dynamics
... Using evidence from the graph, explain how genetic variation contributed to a variety of phenotypic responses to the disease outbreak. (LO 4.25) ...
... Using evidence from the graph, explain how genetic variation contributed to a variety of phenotypic responses to the disease outbreak. (LO 4.25) ...
The Future of the Fossil Record
... opportunities for other groups. Although such transitions are usually ascribed to global events, as in the evolutionary exploits of the mammals after the dinosaurs’ demise, some evidence suggests that local or regional perturbations may facilitate major biotic changes as manifest at a given locale ( ...
... opportunities for other groups. Although such transitions are usually ascribed to global events, as in the evolutionary exploits of the mammals after the dinosaurs’ demise, some evidence suggests that local or regional perturbations may facilitate major biotic changes as manifest at a given locale ( ...
New England Forest Ecology
... Look for evidence in human refuse left, stone walls, indicators on trees, and in the ground. Try to look at the woods with a critical eye and say “why did things get to be that way?” Try to figure out the use of stonewalls and what the land use was on either side of them. Go to multiple site ...
... Look for evidence in human refuse left, stone walls, indicators on trees, and in the ground. Try to look at the woods with a critical eye and say “why did things get to be that way?” Try to figure out the use of stonewalls and what the land use was on either side of them. Go to multiple site ...
The postCambrian era was characterized by animal
... existence in animals, such as limbs in amphibians and epidermal scales in reptiles. Changes in the environment often create new niches (living spaces) that contribute to rapid speciation and increased diversity. On the other hand, cataclysmic events, such as volcanic eruptions and meteor strikes tha ...
... existence in animals, such as limbs in amphibians and epidermal scales in reptiles. Changes in the environment often create new niches (living spaces) that contribute to rapid speciation and increased diversity. On the other hand, cataclysmic events, such as volcanic eruptions and meteor strikes tha ...
Biodiversity - University of Windsor
... episodes of mass extinction in which a significant fraction of living taxa have disappeared over fairly short times. The rate of diversification following each mass extinction was much higher than at other times, in each case due to the availability of resources and niche space. ...
... episodes of mass extinction in which a significant fraction of living taxa have disappeared over fairly short times. The rate of diversification following each mass extinction was much higher than at other times, in each case due to the availability of resources and niche space. ...
Coastal Ecosystems Presentation
... • community - A community consists of all the populations of various species that live and interact in an area. • habitat - An organism’s habitat is the place where it lives within an ecosystem. Several populations share the same habitat. Habitats provide food, water, shelter and space. • limiting f ...
... • community - A community consists of all the populations of various species that live and interact in an area. • habitat - An organism’s habitat is the place where it lives within an ecosystem. Several populations share the same habitat. Habitats provide food, water, shelter and space. • limiting f ...
Biodiversity, ecosystem services and adaptation - BASIC
... Many of the costs of changes in biodiversity have historically not been factored into decision-making. Many costs associated with changes in biodiversity may be slow to become apparent, may be apparent only at some distance from where biodiversity was changed, or may involve thresholds or changes in ...
... Many of the costs of changes in biodiversity have historically not been factored into decision-making. Many costs associated with changes in biodiversity may be slow to become apparent, may be apparent only at some distance from where biodiversity was changed, or may involve thresholds or changes in ...
areading 10
... Active Reading Section: Biodiversity at Risk Read the passage below and answer the questions that follow. ...
... Active Reading Section: Biodiversity at Risk Read the passage below and answer the questions that follow. ...
hau_vivian_tbio_brief1
... Biodiversity can be measured by the Biodiversity Intactness Index (Newbold et al.). The Biodiversity Intactness Index looks at the average abundance of the original species in the area of interest, relative to the original average abundance without anthropogenic changes (Newbold 11). The main proble ...
... Biodiversity can be measured by the Biodiversity Intactness Index (Newbold et al.). The Biodiversity Intactness Index looks at the average abundance of the original species in the area of interest, relative to the original average abundance without anthropogenic changes (Newbold 11). The main proble ...
Chapter 12
... have been destroyed. During the past 100 years, sea levels have risen 10-25 centimeters. We have destroyed more than 1/3 of the world’s mangrove forests for shipping lanes. ...
... have been destroyed. During the past 100 years, sea levels have risen 10-25 centimeters. We have destroyed more than 1/3 of the world’s mangrove forests for shipping lanes. ...
Biodiversity and ecosystem functioning: reconciling the
... would expect surveys to show that plots with many species also have high biomass. At the largest scales plant diversity and productivity are often positively associated but the fact that regional surveys sometimes show negative or unimodal relationships suggests that interactions between environment ...
... would expect surveys to show that plots with many species also have high biomass. At the largest scales plant diversity and productivity are often positively associated but the fact that regional surveys sometimes show negative or unimodal relationships suggests that interactions between environment ...
ecosystem effects
... species losses on ecosystems and should help to provide policy-makers with a firmer basis for decision-making. The two studies examine very different habitats (marine versus terrestrial), each with different kinds of organisms (sea-bed invertebrates versus grassland plants), different ecosystem proc ...
... species losses on ecosystems and should help to provide policy-makers with a firmer basis for decision-making. The two studies examine very different habitats (marine versus terrestrial), each with different kinds of organisms (sea-bed invertebrates versus grassland plants), different ecosystem proc ...
2010 - The Global Biodiversity Challenge
... waste treatment , tourism Biodiversity is also at the heart of many cultural values. ...
... waste treatment , tourism Biodiversity is also at the heart of many cultural values. ...
Community Properties
... • Intervening communities found in succession after pioneer and before climax community are known as “seres”. • Types of communities that area grows through during succession are important, will work on during group exercise • Succession is driven by competition between organisms in each sere. ...
... • Intervening communities found in succession after pioneer and before climax community are known as “seres”. • Types of communities that area grows through during succession are important, will work on during group exercise • Succession is driven by competition between organisms in each sere. ...
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.