Reintroduction: challenges and lessons for basic ecology
... density of conspecifics. These negative effects may vanish in the first wild-born generation, at least for species in which social learning and cultural transmission are low. However, demographic and even behavioural studies require long-term effort, to achieve sufficient sample sizes and relevant o ...
... density of conspecifics. These negative effects may vanish in the first wild-born generation, at least for species in which social learning and cultural transmission are low. However, demographic and even behavioural studies require long-term effort, to achieve sufficient sample sizes and relevant o ...
cockpit country biodiversity manual
... amphibians and 22 known reptiles occur in the Cockpit Country, including four species that are endemic to the Cockpit Country and nine with over 50% of their populations found in the area. All of these animals are endemic to the island, and many are threatened. The area represents the last refuge fo ...
... amphibians and 22 known reptiles occur in the Cockpit Country, including four species that are endemic to the Cockpit Country and nine with over 50% of their populations found in the area. All of these animals are endemic to the island, and many are threatened. The area represents the last refuge fo ...
Word - Learnz
... Plankton form the basis for the Antarctic food web. These are marine and freshwater organisms that, because they are non-motile or too small or weak to swim against the current, exist in a drifting state in the water they live in. The term plankton is a collective name for all such organisms—includi ...
... Plankton form the basis for the Antarctic food web. These are marine and freshwater organisms that, because they are non-motile or too small or weak to swim against the current, exist in a drifting state in the water they live in. The term plankton is a collective name for all such organisms—includi ...
Tropical Lakes Biodiversity Crisis
... Tropical lakes are all facing anthropogenic changes. Species distinction plays an important role in identifying biodiversity loss Historically not properly studied and understood Must know more for correct management ...
... Tropical lakes are all facing anthropogenic changes. Species distinction plays an important role in identifying biodiversity loss Historically not properly studied and understood Must know more for correct management ...
Edible insects as a natural resource
... adverse effects on populations of other insect species and affect ecosystem functions. Overexploitation is another serious challenge to both the current and future practice of entomophagy (Morris, 2004; Schabel, 2006), particularly if the number of collected individuals (mature and immature) exceeds ...
... adverse effects on populations of other insect species and affect ecosystem functions. Overexploitation is another serious challenge to both the current and future practice of entomophagy (Morris, 2004; Schabel, 2006), particularly if the number of collected individuals (mature and immature) exceeds ...
RCD_letter - Yolo County Resource Conservation District
... According to C.E. Bell et al. (UC-DANR Publ. 74139), invasive plants can cause significant economic and ecological damage in natural and agricultural areas. From an economic standpoint, invasive species can reduce livestock forage quality and quantity, jeopardize animal and human health, increase th ...
... According to C.E. Bell et al. (UC-DANR Publ. 74139), invasive plants can cause significant economic and ecological damage in natural and agricultural areas. From an economic standpoint, invasive species can reduce livestock forage quality and quantity, jeopardize animal and human health, increase th ...
15 Competition 2008
... 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific compet ...
... 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific compet ...
15 Competition 2008
... 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific compet ...
... 1) Facilitation is the alternative to competition; it is understudied. 2) Consumers compete by using a resource that reduces availability to others. 3) Competition occurs through exploitation of shared resources or direct interference. 4) Responses of plant and animal species to intraspecific compet ...
General Equilibrium of an Ecosystem
... organism’s demands for biomass from other organisms, and the demands are aggregated over all organisms within each species to build the biomass market demands and market supplies. An equilibrium occurs when market demands for each species’ biomass are equated to the supply of that species biomass a ...
... organism’s demands for biomass from other organisms, and the demands are aggregated over all organisms within each species to build the biomass market demands and market supplies. An equilibrium occurs when market demands for each species’ biomass are equated to the supply of that species biomass a ...
Thermal sensitivity of the freshwater crayfish, Euastacus spinifer
... Locusts are distinguished from other acridid species, such as grasshoppers, by their ability to change their morphological and behavioural characteristics in response to population density. During periods of increased population growth, contact between shy solitary locusts becomes unavoidable, leadi ...
... Locusts are distinguished from other acridid species, such as grasshoppers, by their ability to change their morphological and behavioural characteristics in response to population density. During periods of increased population growth, contact between shy solitary locusts becomes unavoidable, leadi ...
Existence and construction of large stable food webs
... of species, symbol (T) marks top species, i.e. species without consumers. Side branches are marked by the symbol “SB”. A branching species (or branching point) is marked by “B”. Qc = α00 /β b, An example of a pairing, consisting of a “free” consumer and a “controlled” resource species. c, Definition ...
... of species, symbol (T) marks top species, i.e. species without consumers. Side branches are marked by the symbol “SB”. A branching species (or branching point) is marked by “B”. Qc = α00 /β b, An example of a pairing, consisting of a “free” consumer and a “controlled” resource species. c, Definition ...
Body size in ecological networks
... smallest phytoplankton at the base of the web and the largest predatory fish at the top ([2,3]; Figure 1b). Because many life-history traits are correlated with body size, this variation can have potentially profound effects across multiple scales of biological organization, from the individual to t ...
... smallest phytoplankton at the base of the web and the largest predatory fish at the top ([2,3]; Figure 1b). Because many life-history traits are correlated with body size, this variation can have potentially profound effects across multiple scales of biological organization, from the individual to t ...
What Limits Your Species
... environment is exceeded, organisms die and the environment may be permanently destroyed. Carrying capacity usually refers to a single species and its habitat. Provide each student with a copy of the carrying capacity box and explain that the box is an example of an environment that an animal would ...
... environment is exceeded, organisms die and the environment may be permanently destroyed. Carrying capacity usually refers to a single species and its habitat. Provide each student with a copy of the carrying capacity box and explain that the box is an example of an environment that an animal would ...
Response of California Red-legged Frogs to Removal of Non
... fish removal. This may ultimately translate into an increase in breeding adults at each treated pond. Further monitoring of these ponds will include efforts to determine trends in adult population fluctuations. Gill-nets have been used successfully to remove salmonid fishes from high elevation lakes ...
... fish removal. This may ultimately translate into an increase in breeding adults at each treated pond. Further monitoring of these ponds will include efforts to determine trends in adult population fluctuations. Gill-nets have been used successfully to remove salmonid fishes from high elevation lakes ...
Teacher Resource Guide
... extinction. Both plants and animals can be endangered. There are many factors that can lead to an animal becoming endangered, including both natural and human impacts. For example, loss of habitat is a major threat that can quickly decimate the population of a species. This affects most plant and an ...
... extinction. Both plants and animals can be endangered. There are many factors that can lead to an animal becoming endangered, including both natural and human impacts. For example, loss of habitat is a major threat that can quickly decimate the population of a species. This affects most plant and an ...
Forestry and Agricultural Management Can Enhance Biodiversity
... recovery could have occurred. Saying that fire suppression is good is not to say that all fire is badConly uncontrolled wildfires. Fire is a recognized landmanagement tool that can have a positive effect on biodiversity when used appropriately with proper safeguards and precautions. In fact, it is o ...
... recovery could have occurred. Saying that fire suppression is good is not to say that all fire is badConly uncontrolled wildfires. Fire is a recognized landmanagement tool that can have a positive effect on biodiversity when used appropriately with proper safeguards and precautions. In fact, it is o ...
Predicting ecosystem stability from community
... are normal variables with zero mean and unit variance that are independent through time (white noise) but may be correlated between species (e.g. a good year for one species may be good for another species as well). Demographic stochasticity is the last term in Equation (1). It is due to variation i ...
... are normal variables with zero mean and unit variance that are independent through time (white noise) but may be correlated between species (e.g. a good year for one species may be good for another species as well). Demographic stochasticity is the last term in Equation (1). It is due to variation i ...
Ode to a Codfish Feature
... changes over the past 200 to 500 years, providing us with a baseline that extends long before the advent of modern technology,” says Leavenworth, “and before significant impacts on the ecosystem.” Three COML HMAP centers for the study of environmental history have been established: at the University ...
... changes over the past 200 to 500 years, providing us with a baseline that extends long before the advent of modern technology,” says Leavenworth, “and before significant impacts on the ecosystem.” Three COML HMAP centers for the study of environmental history have been established: at the University ...
Scaling up keystone effects from simple to complex
... (1) strong suppression of the competitive dominant by the keystone may only weakly affect subordinate competitors; (2) the community context of the target species determines whether strong keystone effects are realized; (3) simple, measurable, and local attributes of complex communities may explain ...
... (1) strong suppression of the competitive dominant by the keystone may only weakly affect subordinate competitors; (2) the community context of the target species determines whether strong keystone effects are realized; (3) simple, measurable, and local attributes of complex communities may explain ...
Final report Fishing Impact on Benthic Communities
... wayline had significantly higher stomach content weights per unit body mass than those from the control area. No such difference occurred for P. prideaux. The diets of the two species were similar, including crustaceans, polychaetes and molluscs, although the ranked importance of each type of prey d ...
... wayline had significantly higher stomach content weights per unit body mass than those from the control area. No such difference occurred for P. prideaux. The diets of the two species were similar, including crustaceans, polychaetes and molluscs, although the ranked importance of each type of prey d ...
Ecological Applications at the Level of Organisms and Single
... represent decadal population increments. (After United Nations, ...
... represent decadal population increments. (After United Nations, ...
Mesoamerican Reef
... The ramifications of dying coral are extremely appalling within the Mesoamerican reef. Coral, in terms of the eco system, provides a habitat and safe sanctuary to over 500 different species of fish, along with the mammoth whale shark, and the endangered salt water crocodile (WWF, 2010). The numerous ...
... The ramifications of dying coral are extremely appalling within the Mesoamerican reef. Coral, in terms of the eco system, provides a habitat and safe sanctuary to over 500 different species of fish, along with the mammoth whale shark, and the endangered salt water crocodile (WWF, 2010). The numerous ...
LAPB 2009 Program wi.. - Louisiana Association of Professional
... the southern portion of the state. Coastal prairie once comprised between two and three million acres. However, prairies could also once be found throughout scattered localities in north Louisiana. These prairies were known as “pocket prairies” due to their small size and general isolation from simi ...
... the southern portion of the state. Coastal prairie once comprised between two and three million acres. However, prairies could also once be found throughout scattered localities in north Louisiana. These prairies were known as “pocket prairies” due to their small size and general isolation from simi ...
SCIENCE FOCUS 9 UNIT 1
... 8. Why were cowbirds and coyotes able to survive in the new habitats while songbirds and wolves couldn’t? _______________________________________________________________ __________________________________________________________________________(60) 9. What is a problem associated with using pesticid ...
... 8. Why were cowbirds and coyotes able to survive in the new habitats while songbirds and wolves couldn’t? _______________________________________________________________ __________________________________________________________________________(60) 9. What is a problem associated with using pesticid ...
Overexploitation
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing returns. Sustained overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers.In ecology, overexploitation describes one of the five main activities threatening global biodiversity. Ecologists use the term to describe populations that are harvested at a rate that is unsustainable, given their natural rates of mortality and capacities for reproduction. This can result in extinction at the population level and even extinction of whole species. In conservation biology the term is usually used in the context of human economic activity that involves the taking of biological resources, or organisms, in larger numbers than their populations can withstand. The term is also used and defined somewhat differently in fisheries, hydrology and natural resource management.Overexploitation can lead to resource destruction, including extinctions. However it is also possible for overexploitation to be sustainable, as discussed below in the section on fisheries. In the context of fishing, the term overfishing can be used instead of overexploitation, as can overgrazing in stock management, overlogging in forest management, overdrafting in aquifer management, and endangered species in species monitoring. Overexploitation is not an activity limited to humans. Introduced predators and herbivores, for example, can overexploit native flora and fauna.