crinoids
... Crinoids can be divided into four subclasses, the Inadunata, Flexibilia, Camerata and Articulata. Of these, the first three are confined to the Palaeozoic era and the last to post-Triassic communities. The precise origins of the class are lost in the Precambrian, although both cystoids and eocrinoid ...
... Crinoids can be divided into four subclasses, the Inadunata, Flexibilia, Camerata and Articulata. Of these, the first three are confined to the Palaeozoic era and the last to post-Triassic communities. The precise origins of the class are lost in the Precambrian, although both cystoids and eocrinoid ...
ecology - Moeller
... when energy is transformed from one form to another, there is always some loss of energy from the system. ...
... when energy is transformed from one form to another, there is always some loss of energy from the system. ...
Chapter 1 Environmental Problems, Their Causes, and Sustainability
... Science Focus: Threats to Kelp Forests Kelp forests: biologically diverse marine habitat Major threats to kelp forests • Sea urchins • Pollution from water run-off • Global warming Purple Sea Urchin Predator and Prey Interactions Can Drive Each Other’s Evolution Intense natural selection pressures b ...
... Science Focus: Threats to Kelp Forests Kelp forests: biologically diverse marine habitat Major threats to kelp forests • Sea urchins • Pollution from water run-off • Global warming Purple Sea Urchin Predator and Prey Interactions Can Drive Each Other’s Evolution Intense natural selection pressures b ...
WEB OF LIFE - KidsPlanet.org
... that the health of our oceans is at risk. In addition, if sea otters are declining due to disease and effects from environmental contaminants, then it is likely that the prey they are consuming is suffering as well. Since humans consume a variety of seafood, the health of our oceans is a major facto ...
... that the health of our oceans is at risk. In addition, if sea otters are declining due to disease and effects from environmental contaminants, then it is likely that the prey they are consuming is suffering as well. Since humans consume a variety of seafood, the health of our oceans is a major facto ...
2 Environmental Solutions
... species. This means that scientists work both to protect existing individuals of an endangered species, and to increase the population. To help some species recover, scientists remove individuals from the wild to breed them. This is known as captive breeding. It can help some species produce more of ...
... species. This means that scientists work both to protect existing individuals of an endangered species, and to increase the population. To help some species recover, scientists remove individuals from the wild to breed them. This is known as captive breeding. It can help some species produce more of ...
Chapter 22-Sustaining Wild Species
... Species is no longer found in an area it once was, but it is found in other areas. Ex. White tail deer was near a local extinction but has recovered to a large population size. ...
... Species is no longer found in an area it once was, but it is found in other areas. Ex. White tail deer was near a local extinction but has recovered to a large population size. ...
Link Here
... Nitrogen Cycle: The main reserve of nitrogen is in the atmosphere. Since the nitrogen gas cannot be used by organisms as it is, the nitrogen in the air have to be fixated. The nitrogen-fixing plants such as legumes that have rhizobium produce usable sources of nitrogen such as ammonium ions or nit ...
... Nitrogen Cycle: The main reserve of nitrogen is in the atmosphere. Since the nitrogen gas cannot be used by organisms as it is, the nitrogen in the air have to be fixated. The nitrogen-fixing plants such as legumes that have rhizobium produce usable sources of nitrogen such as ammonium ions or nit ...
Biodiversity week 5
... stable or sustainable to stand with environmental disturbances such as drought and insect infestations. David Tilman hypothesize: Communities with higher plant species richness produce a certain amount of biomass more consistently than communities with fewer species. Higher level of biomass less a ...
... stable or sustainable to stand with environmental disturbances such as drought and insect infestations. David Tilman hypothesize: Communities with higher plant species richness produce a certain amount of biomass more consistently than communities with fewer species. Higher level of biomass less a ...
File
... Ecological systems can be small or large • Population—all the organisms within an area that belong to the same species. • Community—all the various populations that interact in a particular locale, e.g. a coral reef, a forest, a pond, or even ...
... Ecological systems can be small or large • Population—all the organisms within an area that belong to the same species. • Community—all the various populations that interact in a particular locale, e.g. a coral reef, a forest, a pond, or even ...
14.1 Habitat And Niche
... A habitat differs from a niche. • A habitat is all aspects of the area in which an organism lives. – biotic factors – abiotic factors • An ecological niche includes all of the factors that a species needs to survive, stay healthy, and reproduce. – food – abiotic conditions – behavior Fig. A lion mus ...
... A habitat differs from a niche. • A habitat is all aspects of the area in which an organism lives. – biotic factors – abiotic factors • An ecological niche includes all of the factors that a species needs to survive, stay healthy, and reproduce. – food – abiotic conditions – behavior Fig. A lion mus ...
Adriatic - Fondazione Cetacea
... great white shark, can reach huge size. Together with sharks, other members of the Elasmobranch group are here present: for instance, several rays among which the bigger is the Mobula mobular, called the devil ray. Millions of specimens are killed every year around the world, intentionally or accide ...
... great white shark, can reach huge size. Together with sharks, other members of the Elasmobranch group are here present: for instance, several rays among which the bigger is the Mobula mobular, called the devil ray. Millions of specimens are killed every year around the world, intentionally or accide ...
Competition I
... will be able to continue to increase even after the other has reached its isoclines an equilibrated. Hmmm… but if this species continues to increase, it will impose a progressively greater competitive effect on the equilibrated species. Yes…meaning that the equilibrated species will decline, and equ ...
... will be able to continue to increase even after the other has reached its isoclines an equilibrated. Hmmm… but if this species continues to increase, it will impose a progressively greater competitive effect on the equilibrated species. Yes…meaning that the equilibrated species will decline, and equ ...
One of the most striking community-wide effects of top predators is
... went the “pre-fab” route, making our own substrate with hardware embedded in it to attach cages. They look like concrete pizza’s (photo) and are more easily measurable and manipulable. We left them underwater for a year so that they could be colonized by algae to create a “consumable substrate” for ...
... went the “pre-fab” route, making our own substrate with hardware embedded in it to attach cages. They look like concrete pizza’s (photo) and are more easily measurable and manipulable. We left them underwater for a year so that they could be colonized by algae to create a “consumable substrate” for ...
Designing a Simple Biological Community
... decomposer/detritivore can be supported. These are subsisting off of consumer excrement. This relationship with consumer biomass should NOT be treated as consumption from that species’ trophic level! Assume biomass production is on an annual basis and that during this time there is a stable and cons ...
... decomposer/detritivore can be supported. These are subsisting off of consumer excrement. This relationship with consumer biomass should NOT be treated as consumption from that species’ trophic level! Assume biomass production is on an annual basis and that during this time there is a stable and cons ...
Notes compiled - Raleigh Charter High School
... Predator-prey relationships: predator and prey population sizes tend to be cyclic and predator cycles follow prey cycles. One can consider herbivore to be predator of grasses and one can see a similar relationship. Human population explosion: There are almost 6 billion people in the world right now. ...
... Predator-prey relationships: predator and prey population sizes tend to be cyclic and predator cycles follow prey cycles. One can consider herbivore to be predator of grasses and one can see a similar relationship. Human population explosion: There are almost 6 billion people in the world right now. ...
IOSR Journal of Environmental Science, Toxicology and Food Technology (IOSR-JESTFT)
... the importation from any foreign country any animal-whole or in part, any product, or any egg belonging to a species on that list. Limited exceptions for scientific, educational, zoological, or propagational purposes and for certain cases of commercial "economic hardship" were allowed under strict p ...
... the importation from any foreign country any animal-whole or in part, any product, or any egg belonging to a species on that list. Limited exceptions for scientific, educational, zoological, or propagational purposes and for certain cases of commercial "economic hardship" were allowed under strict p ...
Notes on Living Things and Their Environment
... (ex: giant sea bass catching & eating a smaller fish; smaller fish hunting down and eating a sea urchin) – herbivores can’t be predators 25. Prey – animal that is hunted down and eaten by another animal. (ex: the smaller fish that is eaten by the giant sea bass; the sea urchin that is eaten by the s ...
... (ex: giant sea bass catching & eating a smaller fish; smaller fish hunting down and eating a sea urchin) – herbivores can’t be predators 25. Prey – animal that is hunted down and eaten by another animal. (ex: the smaller fish that is eaten by the giant sea bass; the sea urchin that is eaten by the s ...
population ecology
... may have to restrict its activity to avoid predators, or competition with other species may prevent it from using a resource. ...
... may have to restrict its activity to avoid predators, or competition with other species may prevent it from using a resource. ...
Biology Pre-Learning Check
... Water pollution increase decomposition Rising water temps mean less O2 & CO2 ...
... Water pollution increase decomposition Rising water temps mean less O2 & CO2 ...
3 River Wildlife
... can take root and huge numbers of borrowing animals such as snails can thrive. Wading birds of all kinds are adapted to find food buried in the sand and mud. Birds include curlew, redshank, oystercatcher and ducks. Riverbanks are important in many ways. They provide food, space and shelter for plant ...
... can take root and huge numbers of borrowing animals such as snails can thrive. Wading birds of all kinds are adapted to find food buried in the sand and mud. Birds include curlew, redshank, oystercatcher and ducks. Riverbanks are important in many ways. They provide food, space and shelter for plant ...
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.