Abstract The term biodiversity means biological diversity at different
... species diversity to ecosystem diversity. The distribution of plant diversity on Earth is not uniform and it is influenced by various factors. In my thesis I emphasize physical-geographic factors, which include climate, soil and topography. Next I assess the influence of environmental heterogeneity, ...
... species diversity to ecosystem diversity. The distribution of plant diversity on Earth is not uniform and it is influenced by various factors. In my thesis I emphasize physical-geographic factors, which include climate, soil and topography. Next I assess the influence of environmental heterogeneity, ...
Conservation Strategies, Species Action Plans, and
... Endangered: This important category is defined as including taxa in danger of extinction whose survival is unlikely if current causal factors continue operating. It includes taxa whose numbers have been reduced to a critical level or whose habitats have been so drastically reduced that they are deem ...
... Endangered: This important category is defined as including taxa in danger of extinction whose survival is unlikely if current causal factors continue operating. It includes taxa whose numbers have been reduced to a critical level or whose habitats have been so drastically reduced that they are deem ...
AZAExSitu - Amphibian Ark
... August - WAZA/CBSG annual meetings September – AZA, EAZA September – Madagascar October – Costa Rica Colombia, Tanzania, … ...
... August - WAZA/CBSG annual meetings September – AZA, EAZA September – Madagascar October – Costa Rica Colombia, Tanzania, … ...
File
... contain and the relative abundances of those species. A species can occur in a location only if it is able to colonize and persist there. A community contains those species that have colonized minus those that have gone extinct locally. ...
... contain and the relative abundances of those species. A species can occur in a location only if it is able to colonize and persist there. A community contains those species that have colonized minus those that have gone extinct locally. ...
TT ECOL
... dependent and independent juveniles, and observation of nesting activity. The few nests that were seen were 15-20 meters high and in dense cover. One of the nests was in an excavated tree hole, which is not typical with thrush species. Breeding occurred all year round, with notable increase in . In ...
... dependent and independent juveniles, and observation of nesting activity. The few nests that were seen were 15-20 meters high and in dense cover. One of the nests was in an excavated tree hole, which is not typical with thrush species. Breeding occurred all year round, with notable increase in . In ...
Ch45 Lecture-Ecological Communities
... contain and the relative abundances of those species. A species can occur in a location only if it is able to colonize and persist there. A community contains those species that have colonized minus those that have gone extinct locally. ...
... contain and the relative abundances of those species. A species can occur in a location only if it is able to colonize and persist there. A community contains those species that have colonized minus those that have gone extinct locally. ...
Saturation of biological diversity and human activity
... unintentional way. As history shows, humans have introduced known and domesticated animals, as well as useful plants to new places. At the same time, humans would take with themselves the specimen of animals and plants purely for esthetic and personal reasons (as souvenirs). Thus, alien species are ...
... unintentional way. As history shows, humans have introduced known and domesticated animals, as well as useful plants to new places. At the same time, humans would take with themselves the specimen of animals and plants purely for esthetic and personal reasons (as souvenirs). Thus, alien species are ...
Biodiversity and Habitat
... strongly fragmented by dams and reservoirs (20).” (Butchart, et al., 2010) In many fragmented habitats, threatened or endangered populations can be considered the “living dead”. “Extinction processes often occur with a time delay and populations living close to their extinction threshold might survi ...
... strongly fragmented by dams and reservoirs (20).” (Butchart, et al., 2010) In many fragmented habitats, threatened or endangered populations can be considered the “living dead”. “Extinction processes often occur with a time delay and populations living close to their extinction threshold might survi ...
CH 17: Populations
... A typical two-week course of antibiotics can exert selection pressure on over a thousand generations of bacteria. If ANY remain, they do so because they may have a mutated gene that causes a resistance to these antibiotics. Antibiotic resistant strains are now found everywhere, in hospitals and s ...
... A typical two-week course of antibiotics can exert selection pressure on over a thousand generations of bacteria. If ANY remain, they do so because they may have a mutated gene that causes a resistance to these antibiotics. Antibiotic resistant strains are now found everywhere, in hospitals and s ...
chapter 6 section 3 notes
... DDT, for example, prevents birds from laying healthy eggs. Acid rain places stress on land and water organisms. ...
... DDT, for example, prevents birds from laying healthy eggs. Acid rain places stress on land and water organisms. ...
Ecological Communities
... • Climatic conditions in the tropics have been stable over long time periods and were not affected by the glacial cycles that caused massive shifts in geographic ranges of temperate species. • Absence of disturbance at large spatial scales may have allowed these communities to retain more of their s ...
... • Climatic conditions in the tropics have been stable over long time periods and were not affected by the glacial cycles that caused massive shifts in geographic ranges of temperate species. • Absence of disturbance at large spatial scales may have allowed these communities to retain more of their s ...
Ecological Communities
... • Climatic conditions in the tropics have been stable over long time periods and were not affected by the glacial cycles that caused massive shifts in geographic ranges of temperate species. – Absence of disturbance at large spatial scales may have allowed these communities to retain more of their s ...
... • Climatic conditions in the tropics have been stable over long time periods and were not affected by the glacial cycles that caused massive shifts in geographic ranges of temperate species. – Absence of disturbance at large spatial scales may have allowed these communities to retain more of their s ...
UNIT 1: PRINCIPLES OF BIOLOGY AND ECOLOGY
... A. Environmental factors that affect an organism’s ability to survive in its environment, such as food availability, predators, and temperature are limiting factors. B. Limiting factors may be biotic or abiotic but regardless they will restrict the existence, numbers, reproduction or distribution of ...
... A. Environmental factors that affect an organism’s ability to survive in its environment, such as food availability, predators, and temperature are limiting factors. B. Limiting factors may be biotic or abiotic but regardless they will restrict the existence, numbers, reproduction or distribution of ...
Preview Sample 2
... 23. Which of these is NOT a focus of habitat conservation? A. identifying representative habitats B. identifying countries rich in species C. identifying areas rich in endemics D. identifying areas of rich farm land E. identifying areas rich in endemics and identifying representative habitats ...
... 23. Which of these is NOT a focus of habitat conservation? A. identifying representative habitats B. identifying countries rich in species C. identifying areas rich in endemics D. identifying areas of rich farm land E. identifying areas rich in endemics and identifying representative habitats ...
biodiversity
... species, there are no timelines prescribed by SARA for the identification of critical habitat, and recovery strategies and action plans are only required to identify critical habitat “if possible”[1] The passing of the law Bill C-29 Species at Risk Act (SARA) was criticized by many including scienti ...
... species, there are no timelines prescribed by SARA for the identification of critical habitat, and recovery strategies and action plans are only required to identify critical habitat “if possible”[1] The passing of the law Bill C-29 Species at Risk Act (SARA) was criticized by many including scienti ...
Now you see them, now you don`t! – population crashes of
... Substantial populations of invasive non-indigenous species occasionally collapse dramatically. Although disease is often invoked, the causes are rarely studied experimentally and/or quantitatively, and some collapses remain quite mysterious. The widespread invasive snail Achatina fulica and pondweed ...
... Substantial populations of invasive non-indigenous species occasionally collapse dramatically. Although disease is often invoked, the causes are rarely studied experimentally and/or quantitatively, and some collapses remain quite mysterious. The widespread invasive snail Achatina fulica and pondweed ...
Log-normal distribution
... data set is best fit by one of the theoretical distributions broken-stick ...
... data set is best fit by one of the theoretical distributions broken-stick ...
UDC 574:502 Biological diversity: a modern state close and distant
... group has its own individual and unique features. This was pointed out by V.I. Vernadsky in his conceptual positions on living matter of the biosphere. Although the concept and the term "biodiversity" is enshrined in international instruments (Convention on Biological Diversity, 1992) - "Biological ...
... group has its own individual and unique features. This was pointed out by V.I. Vernadsky in his conceptual positions on living matter of the biosphere. Although the concept and the term "biodiversity" is enshrined in international instruments (Convention on Biological Diversity, 1992) - "Biological ...
Branchinecta of North America
... Branchinecta species in California as threatened or endangered (U.S. Fish and Wildlife, 1992), biologists need to study the genetics, demography, and ecology of these species to develop management strategies. The single-locus genetic data inform us that the majority of individual populations are unl ...
... Branchinecta species in California as threatened or endangered (U.S. Fish and Wildlife, 1992), biologists need to study the genetics, demography, and ecology of these species to develop management strategies. The single-locus genetic data inform us that the majority of individual populations are unl ...
Chapter 11 power point
... As population is reduced in size, some of the genetic diversity is likely to be lost. Certain kinds of species are more likely to go extinct than others: • Species with small, dispersed populations – Successful breeding is difficult. ...
... As population is reduced in size, some of the genetic diversity is likely to be lost. Certain kinds of species are more likely to go extinct than others: • Species with small, dispersed populations – Successful breeding is difficult. ...
Supersized MPAs and the marginalization of species conservation
... conserve species effectively then the downstream benefits of ecosystem structure, function, and services will also be secured and resilient. I am not arguing against MPAs or any other form of conservation for higher-level attributes or values, but I raise the question as to whether in doing so we may ...
... conserve species effectively then the downstream benefits of ecosystem structure, function, and services will also be secured and resilient. I am not arguing against MPAs or any other form of conservation for higher-level attributes or values, but I raise the question as to whether in doing so we may ...
Acceptance speech
... recognizing the achievements in a research area that does not result in readily “identified” short term benefits. “Population genetics and evolution” has long term interests and looks at changes within species that accumulate over evolutionary times. However, time has all of a sudden accelerated. We ...
... recognizing the achievements in a research area that does not result in readily “identified” short term benefits. “Population genetics and evolution” has long term interests and looks at changes within species that accumulate over evolutionary times. However, time has all of a sudden accelerated. We ...
Losing history: how extinctions prune features from the tree of life
... the link between phylogenetic branch lengths and character change has sometimes become less obvious. As described above, most large-scale analyses of PD employ time-calibrated phylogenetic trees with an, often implicit, assumption that time represents evolutionary opportunity for character change. W ...
... the link between phylogenetic branch lengths and character change has sometimes become less obvious. As described above, most large-scale analyses of PD employ time-calibrated phylogenetic trees with an, often implicit, assumption that time represents evolutionary opportunity for character change. W ...
Biodiversity is the variety of life. It can be studied on different scopes
... Genetic diversity allows species to better adjusts to adversities such as change in environment and diseases. Not only does genetic diversity benefit the species, it also helps the ecosystem. For example, after a fire or flood, a forest with 20 reptiles is more likely to adapt than another forest wi ...
... Genetic diversity allows species to better adjusts to adversities such as change in environment and diseases. Not only does genetic diversity benefit the species, it also helps the ecosystem. For example, after a fire or flood, a forest with 20 reptiles is more likely to adapt than another forest wi ...
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.