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Last Ark Outreach/Encounter
Last Ark Outreach/Encounter

... Do not just talk about causes for the reduction of animal populations but also talk about positive actions that are being taken by zoos and others to help the situation. It is important that children not be overwhelmed with the weight of this topic and that they understand that adults are working to ...
Forest Fragmentation
Forest Fragmentation

... species wander too close to the edge of protective habitat, predators can take them. Some species may be excellent competitors deep within their own specialized habitat, but less successful against those species found at the edge of their habitat. Flow of genetic material throughout landscape. Wildl ...
Population Ecology
Population Ecology

... Density-independent factor Density-dependent factor ...
The Nature of Scientific Knowledge
The Nature of Scientific Knowledge

... randomly and organisms do not move from one quadrant to another. Number of individuals counted in each of the chosen quadrants. Yields # of organisms per unit area. ...
Population Biology - Blue Valley Schools
Population Biology - Blue Valley Schools

... randomly and organisms do not move from one quadrant to another. Number of individuals counted in each of the chosen quadrants. Yields # of organisms per unit area. ...
Biotic Interaction
Biotic Interaction

... interaction with other organisms including feeding relationships, competition, and symbiosis ...
Habitat and Niche
Habitat and Niche

... niches, which can overlap, but there must be distinct differences between any two niches. When plants and animals are introduced, either intentionally or by accident, into a new environment, they can occupy the existing niches of native organisms. Sometimes new species out-compete native species, an ...
Living things and the environment
Living things and the environment

... to survive and produce more offspring. • Offspring inherit these characteristics also live to reproduce. • Poorly suited characteristics may disappear from a species. ...
POPULATION BIOTIC POTENTIAL: REPRODUCTIVE RATE
POPULATION BIOTIC POTENTIAL: REPRODUCTIVE RATE

... HISTORY OF POPULATION: A) HOMINID SPECIES: MAN-LIKE APE, 3-4 MILLION YEARS AGO. B) HOMOSAPIENS: 100,000 YEARS AGO. SMALL FAMILIES AND TRIBES, SURVIVED BY HUNTING AND GATHERING, NOMADIC, MIGRATING. SINCE IT WAS DIFFICULT TO MIGRATE WITH CHILDREN, THEY HAD LOW BIRTH RATES. C) 10-12000 YEARS AGO, MAN L ...
Standard 6 - Bulldogbiology.com
Standard 6 - Bulldogbiology.com

...  Marshlands and swamps are often protected to ensure that an organism’s habitat is not destroyed.  Human effects on the environment are also long term. Global warming and global climate change can both affect ecosystems and biodiversity. o Introduction of invasive, non-native species - By introduc ...
Carrying Capacity PPT
Carrying Capacity PPT

... enough water, cover and space to support twenty rabbits, but if there is only enough food for ten rabbits, the population will not grow any larger. What is the limiting factor? ...
Population Dynamics
Population Dynamics

... Populations go through three stages. • Population dynamics - study of why populations change and what causes them to change. • Populations go through stages of growth, stability, and decline and follow two patterns of growth: rapid growth and gradual growth. The maximum number of individuals an area ...
Ecology Practice Questions
Ecology Practice Questions

... Collectively, physical factors such as light, temperature, and moisture that affect an organism's life and survival are called the a. biotic environment b. ecosystem c. abiotic environment d. niche The rate of photosynthesis carried on by plants living in a body of water depends upon the a. oxygen c ...
Platform Meeting
Platform Meeting

... Annex II, shall enable the natural habitat types and the species' habitats concerned to be maintained or, where appropriate, restored at a favourable conservation status in their natural range. ...
hssv0401t_powerpres
hssv0401t_powerpres

... • Every population is part of a community. • The most obvious difference between communities is the types of species they have. ...
Human Impact
Human Impact

... alleles within populations. • Using algebra and a simple application of probability, they showed that the frequency of alleles in a population and the ratio of heterozygous to homozygous individuals do not change unless the pop is acted on by things that favor the allele. • Ex. If a dominant allele ...
Save the Costal Habitat of the Endangered Little Devil Why is Little
Save the Costal Habitat of the Endangered Little Devil Why is Little

... tissues that were 7 to 9 times higher than most of the 27 species examined. The implications of these levels to the health of the Black-capped Petrel are unknown, but it raises concerns about increased exposure to mercury in the environment. Oil drilling and other activities in the Black-capped Petr ...
EK 4.A.5 Communities are composed of populations of organisms
EK 4.A.5 Communities are composed of populations of organisms

... death is the same at any age – constant death rate  Examples: Rodents and invertebrates ...
Theory of Habitat Selection
Theory of Habitat Selection

... • Habitat type: good, intermediate and poor • When sp. density is high - good, intermediate and poor habitats would have almost equal suitability (but different densities of sp.) • Individuals would be crowded in the good habitats and at low density in the poor habitat ...
Practice Qs for Ecology answers
Practice Qs for Ecology answers

... 3. Clearing a forest would reduce the amount of energy available to the consumers. True 4. While an understanding of the interactions between organisms and their environment was very important to early hunter and gatherer humans, it is even more important today because humans are having significant ...
Focus 3: Habitat Modeling
Focus 3: Habitat Modeling

... ◦ remoteness from the source of dreissenid veligers ◦ In addition, there may be other, yet unidentified, mechanisms that promote the long-term coexistence of dreissenids and native mussels. ...
Carrying capacity
Carrying capacity

... Sunlight, water, carbon, etc. ...
Ecology- background
Ecology- background

... Based on i. ...
chapter 4
chapter 4

... commensalism — affect the resource use and population sizes of the species in an ecosystem. Over a long time scale, populations of some species develop adaptations to help them use shared resources at different times, in different ways, or in different places – a process called resource partitioning ...
Biodiversity, Species Interactions, and Population Control
Biodiversity, Species Interactions, and Population Control

... Deaths(go out) Immigration(move in) Emigration(move out) (Age structure is important in determining if a population is likely to grow or decrease. ) ...
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Source–sink dynamics

Source–sink dynamics is a theoretical model used by ecologists to describe how variation in habitat quality may affect the population growth or decline of organisms.Since quality is likely to vary among patches of habitat, it is important to consider how a low quality patch might affect a population. In this model, organisms occupy two patches of habitat. One patch, the source, is a high quality habitat that on average allows the population to increase. The second patch, the sink, is very low quality habitat that, on its own, would not be able to support a population. However, if the excess of individuals produced in the source frequently moves to the sink, the sink population can persist indefinitely. Organisms are generally assumed to be able to distinguish between high and low quality habitat, and to prefer high quality habitat. However, ecological trap theory describes the reasons why organisms may actually prefer sink patches over source patches. Finally, the source-sink model implies that some habitat patches may be more important to the long-term survival of the population, and considering the presence of source-sink dynamics will help inform conservation decisions.
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