16, Biological Resources
... Arctic Snow Geese - increase in population has damaged much of Arctic fragile coastal ecosystem (below) ...
... Arctic Snow Geese - increase in population has damaged much of Arctic fragile coastal ecosystem (below) ...
Invasive species: a global concern bubbling to the
... termite from spreading more widely. And a visiting marine ecologist happened to find what was apparently the first European green crab in Washington State, while doing research one exotic species of cord grass along the coast (Townsend, 2000). Mobilizing information quickly is essential to a quick r ...
... termite from spreading more widely. And a visiting marine ecologist happened to find what was apparently the first European green crab in Washington State, while doing research one exotic species of cord grass along the coast (Townsend, 2000). Mobilizing information quickly is essential to a quick r ...
2014 apes review
... c. For organisms to further deplete resources, become weaker, and for some, to perish d. For the intrinsic rate of increase to reach equilibrium with gross primary productivity e. For the birth rate to equal the total solar output per unit rate ...
... c. For organisms to further deplete resources, become weaker, and for some, to perish d. For the intrinsic rate of increase to reach equilibrium with gross primary productivity e. For the birth rate to equal the total solar output per unit rate ...
Science and Economics in the Management of an Invasive Species
... The management measures applied in the California Dungeness crab fishery (limited access, closed season, gear restrictions, and size and sex restrictions) suggest that fishing costs cut substantially into resource rents. Dewees and colleagues (2004) explain that the fishery has been “fully and inten ...
... The management measures applied in the California Dungeness crab fishery (limited access, closed season, gear restrictions, and size and sex restrictions) suggest that fishing costs cut substantially into resource rents. Dewees and colleagues (2004) explain that the fishery has been “fully and inten ...
When an `invasive` fish species fails to invade! Example of the
... to eradicate a relatively low number of topmouth gudgeon may not be required in some water bodies, such as Goldings Hill Pond, where the founder population is very small and/or local factors such as poor habitat suitability (spawning substratum, food resources) and elevated avian predation (Copp et ...
... to eradicate a relatively low number of topmouth gudgeon may not be required in some water bodies, such as Goldings Hill Pond, where the founder population is very small and/or local factors such as poor habitat suitability (spawning substratum, food resources) and elevated avian predation (Copp et ...
The interaction between predation and competition
... and empirical work1. Better targeted empirical investigations should be possible with the new understanding from this and related, although more complex, work for non-Lotka–Volterra systems1,15,17. Maintaining predators is of increasing concern in conservation and management strategies18–21. Humans ...
... and empirical work1. Better targeted empirical investigations should be possible with the new understanding from this and related, although more complex, work for non-Lotka–Volterra systems1,15,17. Maintaining predators is of increasing concern in conservation and management strategies18–21. Humans ...
otters - the facts
... with captive-bred otters. The intention was to try and ensure some continuation of occupancy and allow any surviving otters to interbreed with released ones and perhaps keep any locally adapted genes in the population. At that time there was no evidence of a natural recovery, but as this situation c ...
... with captive-bred otters. The intention was to try and ensure some continuation of occupancy and allow any surviving otters to interbreed with released ones and perhaps keep any locally adapted genes in the population. At that time there was no evidence of a natural recovery, but as this situation c ...
Design an Ecosystem Project (100 points)
... • What it eats (if it’s an animal) or soil & water requirements (if it’s a plant) • What eats it • Reproductive behavior (how many offspring, time of year they reproduce) • Any known usefulness or attractiveness to humans 3. Physical Components including climate (soil type, temperature, amount of pr ...
... • What it eats (if it’s an animal) or soil & water requirements (if it’s a plant) • What eats it • Reproductive behavior (how many offspring, time of year they reproduce) • Any known usefulness or attractiveness to humans 3. Physical Components including climate (soil type, temperature, amount of pr ...
Trophic level
... Trophic position – trophic height of species. Considers diet and energy flow pathways. Species can fall between trophic levels. Omnivory – feeding on more than one trophic level ...
... Trophic position – trophic height of species. Considers diet and energy flow pathways. Species can fall between trophic levels. Omnivory – feeding on more than one trophic level ...
Production, Predation and Food Niche Segregation in a Marine
... in Kvarnbukten Bay in order to assess the abundance, biomass and production of the benthic infauna constituting the main food resource for the predaceous epifauna. The bay was stratified according to depth and substrate composition (Evans and Tallmark, 1976, 1977). Random sampling was carried out in ...
... in Kvarnbukten Bay in order to assess the abundance, biomass and production of the benthic infauna constituting the main food resource for the predaceous epifauna. The bay was stratified according to depth and substrate composition (Evans and Tallmark, 1976, 1977). Random sampling was carried out in ...
Lake Huron Food Web
... growth and survival. A food web illustrates feeding relationships (who eats whom) and energy flow among organisms in an ecosystem (Figure 1). A food web groups organisms into levels based on their feeding position in the food web, known as “trophic levels.” Within a food web, energy moves from lower ...
... growth and survival. A food web illustrates feeding relationships (who eats whom) and energy flow among organisms in an ecosystem (Figure 1). A food web groups organisms into levels based on their feeding position in the food web, known as “trophic levels.” Within a food web, energy moves from lower ...
Slide 1
... are often clumped (around parent or in a gap), but randomness develops as correlations among resources decline. regular can develop if competition becomes limiting. - can change with population, depending on resource distribution. - varies with scale. As scale increases, the environment will appear ...
... are often clumped (around parent or in a gap), but randomness develops as correlations among resources decline. regular can develop if competition becomes limiting. - can change with population, depending on resource distribution. - varies with scale. As scale increases, the environment will appear ...
ecosystem status and trends 2010
... thriving estuaries, particularly in sparsely populated or less accessible areas. Forest area is fairly stable. Over half of Canada’s landscape remains intact and relatively free from human infrastructure. Although much is in the more remote North, this also includes large tracts of boreal forest and ...
... thriving estuaries, particularly in sparsely populated or less accessible areas. Forest area is fairly stable. Over half of Canada’s landscape remains intact and relatively free from human infrastructure. Although much is in the more remote North, this also includes large tracts of boreal forest and ...
Habitat Fragmentation
... for many species that do attempt to use them • This can result in an increased risk of death by predation, if the animal has to venture beyond the cover of the patch to find new food resources, or starvation. • Leaving the safely on interior spaces forces many sepcies into open spaces where the are ...
... for many species that do attempt to use them • This can result in an increased risk of death by predation, if the animal has to venture beyond the cover of the patch to find new food resources, or starvation. • Leaving the safely on interior spaces forces many sepcies into open spaces where the are ...
curriculum map
... Explain how land changes through the process of succession. (Natural) Describe how human activities and natural events alter the process of succession. Identify how human actions change environmental conditions and lead to sources of pollution. Describe how matter recycles through an ecosystem (wate ...
... Explain how land changes through the process of succession. (Natural) Describe how human activities and natural events alter the process of succession. Identify how human actions change environmental conditions and lead to sources of pollution. Describe how matter recycles through an ecosystem (wate ...
Shifts of the feeding niche along the size dimension of three
... on diet or habitat use (Muñoz and Ojeda 1998; Osenberg et al. 1992). Although the consequences of ontogenetic niche shifts for intra- and interspecific interactions in sizestructured populations of fishes have been investigated experimentally (e.g., Olson et al. 1995; Olson 1996), these studies have ...
... on diet or habitat use (Muñoz and Ojeda 1998; Osenberg et al. 1992). Although the consequences of ontogenetic niche shifts for intra- and interspecific interactions in sizestructured populations of fishes have been investigated experimentally (e.g., Olson et al. 1995; Olson 1996), these studies have ...
EDWG Grouse Presentation_10.9.15
... put in place a disturbance cap in priority habitat that limits how much fragmentation of habitat can occur. The caps take into account both existing disturbance and new authorized disturbance. General habitat: Areas that require some special management to protect and sustain greater sage-grouse popu ...
... put in place a disturbance cap in priority habitat that limits how much fragmentation of habitat can occur. The caps take into account both existing disturbance and new authorized disturbance. General habitat: Areas that require some special management to protect and sustain greater sage-grouse popu ...
Trophic interactions - Faculty Reporting System
... • Predators can cause changes to their prey populations – BUT predators can cause changes to populations in trophic levels beyond those they feed on ...
... • Predators can cause changes to their prey populations – BUT predators can cause changes to populations in trophic levels beyond those they feed on ...
Changing Communities of Baltic Coastal Fish
... Cod is a widespread species in the Baltic Sea. It is a marine species, and therefore the amount of cod in the northern parts of the Baltic Sea depends on the success of spawning in southern areas of the Baltic. Cod live in deep cold waters close to the sea floor, though when it is dark they may also ...
... Cod is a widespread species in the Baltic Sea. It is a marine species, and therefore the amount of cod in the northern parts of the Baltic Sea depends on the success of spawning in southern areas of the Baltic. Cod live in deep cold waters close to the sea floor, though when it is dark they may also ...
Climate change direct effects on Antarctic fish and indirect effects on
... factor in the survival of these Antarctic species is recruitment, these early developmental stages are highly sensitive to the effects of climate change. Consistent water temperature of the Southern Ocean supported evolution of stenothermal animal life (Somero et al., 1986). Making these species mo ...
... factor in the survival of these Antarctic species is recruitment, these early developmental stages are highly sensitive to the effects of climate change. Consistent water temperature of the Southern Ocean supported evolution of stenothermal animal life (Somero et al., 1986). Making these species mo ...
River Conservation Challenges and Opportunities
... Biodiversity is a contraction of the wording “biological diversity”, and thus, refers to the variability among living organisms, including all levels from genes to species and ecosystems. Biodiversity is the result of over 3 billion years of evolution, and ultimately is responsible for many of the c ...
... Biodiversity is a contraction of the wording “biological diversity”, and thus, refers to the variability among living organisms, including all levels from genes to species and ecosystems. Biodiversity is the result of over 3 billion years of evolution, and ultimately is responsible for many of the c ...
Australian seabirds
... During the past, seabirds have been killed for their meat, eggs and feathers. Today, changes to breeding habitats, coastal development, oil spills, introduced feral animals and bycatch in fisheries are among the threats that impact on seabird populations. In Australia, more than 30 seabird species a ...
... During the past, seabirds have been killed for their meat, eggs and feathers. Today, changes to breeding habitats, coastal development, oil spills, introduced feral animals and bycatch in fisheries are among the threats that impact on seabird populations. In Australia, more than 30 seabird species a ...
Caribbean and Pacific Coastal marine system
... Oceanographic Institute calculated that over half the world fishery catch comes from upwelling regions, although the regions of upwelling occupy only about one-tenth of 1% of the ocean surface. Coral-reef ecosystems are even more productive than are regions of upwelling in terms of rates of gross pr ...
... Oceanographic Institute calculated that over half the world fishery catch comes from upwelling regions, although the regions of upwelling occupy only about one-tenth of 1% of the ocean surface. Coral-reef ecosystems are even more productive than are regions of upwelling in terms of rates of gross pr ...
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.