![Section 2](http://s1.studyres.com/store/data/008135884_1-3052b18d1b0cef4dac6b287b07a89d1f-300x300.png)
Indirect commensalism promotes persistence of secondary consumer
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13 –16]. Competition between resource species can ...
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13 –16]. Competition between resource species can ...
Indirect commensalism promotes persistence of secondary
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13– 16]. Competition between resource species can ...
... Species at higher trophic levels (carnivores) are particularly vulnerable to extinction [1], and positive indirect interactions among these species have long been considered a potentially important mechanism for the maintenance of species diversity [13– 16]. Competition between resource species can ...
SAP4 - Barnsley Biodiversity Trust
... are opportunistic hunters that will take a wide range of prey, but mainly feed on fish. The Otter is a top predator in the river ecosystem and, as such, it occurs at a naturally low density. A male Otter may use up to 40km of watercourse. This would include main rivers as well as smaller tributaries ...
... are opportunistic hunters that will take a wide range of prey, but mainly feed on fish. The Otter is a top predator in the river ecosystem and, as such, it occurs at a naturally low density. A male Otter may use up to 40km of watercourse. This would include main rivers as well as smaller tributaries ...
Risks to biodiversity from hydraulic fracturing for natural gas in the
... Marcellus and Utica shales. These industrial installations and their edge effects alter as much as 80% of local landscapes.1 The predicted intensity, speed, and extent of industrialization of the landscape have engendered concern about human health but little discussion of the effects on biodiversit ...
... Marcellus and Utica shales. These industrial installations and their edge effects alter as much as 80% of local landscapes.1 The predicted intensity, speed, and extent of industrialization of the landscape have engendered concern about human health but little discussion of the effects on biodiversit ...
The Balance of Nature
... The Bubba Effect - when a road is put through a forest, an area on either side will rapidly degrade - the distance depends on how far Bubba is willing to walk with a 6 pack of beer under one arm, and a shotgun under the other… Density-dependent regulation can be subtle ...
... The Bubba Effect - when a road is put through a forest, an area on either side will rapidly degrade - the distance depends on how far Bubba is willing to walk with a 6 pack of beer under one arm, and a shotgun under the other… Density-dependent regulation can be subtle ...
Hypsiboas geographicus (Map Frog)
... season, the map frog can be both seen and heard more often than during the dry season (Bartlett and Bartlett, 2003). The map frog has been seen and heard between September and March in Ecuador, in the months of February, March, June and July in Brazil, January in Peru and February in Bolivia (Duellm ...
... season, the map frog can be both seen and heard more often than during the dry season (Bartlett and Bartlett, 2003). The map frog has been seen and heard between September and March in Ecuador, in the months of February, March, June and July in Brazil, January in Peru and February in Bolivia (Duellm ...
chapter 55 - Webbbiology
... o About 93% of the world’s coral reefs have been damaged by human activities. o At the present rate of destruction, 40–50% of the reefs, home to one-third of marine fish species, will be lost in the next 30–40 years. ...
... o About 93% of the world’s coral reefs have been damaged by human activities. o At the present rate of destruction, 40–50% of the reefs, home to one-third of marine fish species, will be lost in the next 30–40 years. ...
Class Notes
... o About 93% of the world’s coral reefs have been damaged by human activities. o At the present rate of destruction, 40–50% of the reefs, home to one-third of marine fish species, will be lost in the next 30–40 years. ...
... o About 93% of the world’s coral reefs have been damaged by human activities. o At the present rate of destruction, 40–50% of the reefs, home to one-third of marine fish species, will be lost in the next 30–40 years. ...
File
... o About 93% of the world’s coral reefs have been damaged by human activities. o At the present rate of destruction, 40–50% of the reefs, home to one-third of marine fish species, will be lost in the next 30–40 years. ...
... o About 93% of the world’s coral reefs have been damaged by human activities. o At the present rate of destruction, 40–50% of the reefs, home to one-third of marine fish species, will be lost in the next 30–40 years. ...
State of the World 1998: Chapter 1, The Future of Growth
... concentrated in just a handful of populations, if one such group is wiped out by a temporary catastrophe such as a drought, the birds often have few population sources from which they can recolonize the formerly occupied habitat. Equally important is that many island birds have evolved in isolation ...
... concentrated in just a handful of populations, if one such group is wiped out by a temporary catastrophe such as a drought, the birds often have few population sources from which they can recolonize the formerly occupied habitat. Equally important is that many island birds have evolved in isolation ...
Population Growth Finz 2012
... are examples of population increase of favored organisms. In England alone more than 300,000 cats are put to sleep per year, yet before their domestication, the wild cat ancestors were rare and probably occupied only a small area in the Middle East. ...
... are examples of population increase of favored organisms. In England alone more than 300,000 cats are put to sleep per year, yet before their domestication, the wild cat ancestors were rare and probably occupied only a small area in the Middle East. ...
Hybridization and Conservation
... The New Zealand black stilt - formerly bred throughout New Zealand - now occurs in only one river basin due to predation and loss of breeding habitat. The pied stilt - self-introduced from Australia to the South Island in the early 1800s - spread to the North Island in the 1900s Hybrids - were first ...
... The New Zealand black stilt - formerly bred throughout New Zealand - now occurs in only one river basin due to predation and loss of breeding habitat. The pied stilt - self-introduced from Australia to the South Island in the early 1800s - spread to the North Island in the 1900s Hybrids - were first ...
Distribution patterns - SOEST
... Deep Sea Gigantism Paradox Deep sea is dominated some very large organisms Why? ...
... Deep Sea Gigantism Paradox Deep sea is dominated some very large organisms Why? ...
Understanding Populations Section 1
... short generation times and can reproduce when they are only a few hours or a few days old. • As a result, their populations can grow quickly. • In contrast, large organisms, such as elephants and humans, become sexually mature after a number of years and therefore have a much lower reproductive pote ...
... short generation times and can reproduce when they are only a few hours or a few days old. • As a result, their populations can grow quickly. • In contrast, large organisms, such as elephants and humans, become sexually mature after a number of years and therefore have a much lower reproductive pote ...
Will Mexican Goodeids survive the 21st century? The alarming
... Ilyodon furcidens Has Re-Colonized River Below Mill ...
... Ilyodon furcidens Has Re-Colonized River Below Mill ...
Gillian Martin, Director of the CCI, made a 45
... Gillian Martin, Director of the CCI, made a 45-minute presentation on the existing and forecasted challenges impacting Western Bluebirds and their bird community. A copy of the power point will be made available on the SCBC website. Key points of the presentation include the following: Bluebirds hav ...
... Gillian Martin, Director of the CCI, made a 45-minute presentation on the existing and forecasted challenges impacting Western Bluebirds and their bird community. A copy of the power point will be made available on the SCBC website. Key points of the presentation include the following: Bluebirds hav ...
BC`s Coast Region
... mature forests that have little undergrowth. Hares require relatively undisturbed areas in which to raise their litters, often a shallow depression (called a “form”) lined with belly fur under downed wood or a brush pile. Disturbance, especially from domestic pets and humans can lead to litter aband ...
... mature forests that have little undergrowth. Hares require relatively undisturbed areas in which to raise their litters, often a shallow depression (called a “form”) lined with belly fur under downed wood or a brush pile. Disturbance, especially from domestic pets and humans can lead to litter aband ...
socomun xxv
... help alleviate the problem of the loss of biodiversity. However, the effectiveness of these resolutions has been limited. Through the establishment of local initiatives including the start-up of Certified Wildlife Habitats near homes, schools, and businesses, native plants can be provided with nutri ...
... help alleviate the problem of the loss of biodiversity. However, the effectiveness of these resolutions has been limited. Through the establishment of local initiatives including the start-up of Certified Wildlife Habitats near homes, schools, and businesses, native plants can be provided with nutri ...
limiting factor - cloudfront.net
... Density-dependent factors operate only when the population density reaches a certain level. These factors operate most strongly when a population is large and dense. small They do not affect______________, scattered populations as greatly. ...
... Density-dependent factors operate only when the population density reaches a certain level. These factors operate most strongly when a population is large and dense. small They do not affect______________, scattered populations as greatly. ...
19_Short-comm_ CM_at_al_p
... In ecology, judging of adaptability is based on the concept that presence of species (distributional patterns) depend – among other factors – on the physiological tolerance limits to climatic effects. This concept has to be extended, however, by the assertion that physiological tolerance is unquesti ...
... In ecology, judging of adaptability is based on the concept that presence of species (distributional patterns) depend – among other factors – on the physiological tolerance limits to climatic effects. This concept has to be extended, however, by the assertion that physiological tolerance is unquesti ...
Biodiversity Risks from Fossil Fuel Extraction
... coal) grew from 26,200 million barrels of oil equivalent (MBOE) in 1965 to 80,300 MBOE in 2012 (3). By 2035, oil demand is projected to increase by over 30%, natural gas by 53%, and coal by 50% (4). It is often assumed that legally mandated restoration after extraction (which includes drilling and a ...
... coal) grew from 26,200 million barrels of oil equivalent (MBOE) in 1965 to 80,300 MBOE in 2012 (3). By 2035, oil demand is projected to increase by over 30%, natural gas by 53%, and coal by 50% (4). It is often assumed that legally mandated restoration after extraction (which includes drilling and a ...
Probeseiten 1 PDF
... white rhino which concerns biologists: more alarming still, in their view, is the collapse in abundance of creatures and plants which only a few decades or even years ago, were plentiful. In the case of insects, for example, Dirzo’s team found two thirds of the species studies show an average declin ...
... white rhino which concerns biologists: more alarming still, in their view, is the collapse in abundance of creatures and plants which only a few decades or even years ago, were plentiful. In the case of insects, for example, Dirzo’s team found two thirds of the species studies show an average declin ...
INTRASPECIFIC VARIATION AND GEOGRAPHIC ISOLATION IN
... the criterion for bootstrap analysis (1,000 replicates) of this data set in the interest of saving computational time. Bootstrap support is very strong for several geographically distinct clades in this phylogeny (Fig. 1). For example, all individuals of I. balthica collected in Virginia form a dist ...
... the criterion for bootstrap analysis (1,000 replicates) of this data set in the interest of saving computational time. Bootstrap support is very strong for several geographically distinct clades in this phylogeny (Fig. 1). For example, all individuals of I. balthica collected in Virginia form a dist ...
Biodiversity has been affected by five mass extinction
... the Ordovician-Silurian extinction. The gamma-ray burst would have stripped away the earth's ozone layer, causing intense ultraviolet radiation from the sun. It may account for climate changes observed at the time. The late Devonian extinction may have occurred over a relatively long period of time. ...
... the Ordovician-Silurian extinction. The gamma-ray burst would have stripped away the earth's ozone layer, causing intense ultraviolet radiation from the sun. It may account for climate changes observed at the time. The late Devonian extinction may have occurred over a relatively long period of time. ...
Decline in amphibian populations
![](https://en.wikipedia.org/wiki/Special:FilePath/Bufo_periglenes2.jpg?width=300)
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.