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ESS Topic 3.7 - Limits to Growth
ESS Topic 3.7 - Limits to Growth

... reproduction - water, food, air, space to grow, shelter, etc. Some species have fairly basic needs (some plants only need a little water, sunlight, simple soils, and enough space to spread their leaves), while other species have more complex requirements (think of the food, water, and shelter requir ...
Bell Work: What is the difference between habitat and niche
Bell Work: What is the difference between habitat and niche

... squirrel eats nuts from the top of the tree and the other from  the bottom of the tree. 3. Divergent evolution could allow one species to eat larger  nuts (larger teeth) and one to eat the smaller nuts (smaller  ...
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... consequences for the species diversity of animals. • Species diversity also impacts pathogens. • Diverse communities will be less impacted by hostspecific pathogens. • Low species diversity is characteristic of most modern agricultural ecosystems. ...
File - Down the Rabbit Hole
File - Down the Rabbit Hole

... Mullerian~ 2 or more unpalatable, aposematically colored species resemble each other ...
Populations and Communities Notes
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... population of the United States, however, is projected to grow significantly during this same period. The primary factors bringing the U.S. increase about are immigration and relatively high female fertility. Some scientists believe that there is no greater single threat to the environment than the ...
BIO 112-STUDY GUIDE
BIO 112-STUDY GUIDE

... 2. Define two main types of disturbance and parameters used to characterize disturbance regimes. 3. Define two main types of succession and discuss different mechanisms of succession. Sample Test Questions: 1. Which of the following best illustrates ecological succession? a). A mouse eats seeds, and ...
27-Population-Community
27-Population-Community

... general more stable than simple ones  Species richness refers to the number of species in an ecosystem  It is the quantity usually measured by biologists to characterize an ecosystem’s ...
Ecosystems Overview - earth science and environmental
Ecosystems Overview - earth science and environmental

... Conceptualization of the relationship between landscape water content and the bulk surface resistance to land-atmosphere latent energy and water exchange, vegetation productivity and sequestration of atmospheric CO2. Decreasing water content imposes increasing constraints to CO2 exchange, as do seas ...
Communities, Populations, Conservation Biology
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... average interaction – all tend to decrease the tendency of individual populations within the community to return to their former state following a disturbance (resilience) Thus – community complexity leads to population instability ...
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Ch 4, 5, 6, Notes

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Ecology and Control of Introduced Plants
Ecology and Control of Introduced Plants

... plants are ornamentals and valuable to gardeners and horticulturalists. The horticultural industry in the United States of America is worth billions of dollars – in 1998 US consumers spent $8.5 billion on lawn and garden supplies (McCartney 1999). A Gallup poll conducted in February 1999 revealed th ...
Distribution of Species
Distribution of Species

... Some specialized organisms can be found in places that are not habitable for most animals. Great Salt Lake of Utah supports only two macroscopic inverts, the brine “shrimp” (Artemia salina) and the larvae of the brine fly (Ephydra cinerea). Many other inverts are found in the freshwater streams tha ...
Chapter 8 Understanding Populations
Chapter 8 Understanding Populations

...  Abitoc factors include weather, soil, water, and other nonliving things. Ex: Most amphibians lose and absorb water through their skin, so they must live in moist places. If an area is too hot and dry, or too cold for too long, most amphibians cannot survive.  Biotic factors include factors an org ...
Evolution of Australian Biota Study Day
Evolution of Australian Biota Study Day

... Australia’s most amazing animals. We will cover lots of the Australian Biota syllabus points plus lots of other information you will need to have a good understanding of biology. Some of the main points to have in mind are: A) Humans only live a short amount of time ‐ lots of the processes we are st ...
Community Ecology
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... • Although experimental studies can reveal the existence of interspecific competition, and field experiments can often overcome some of the limitations inherent in laboratory conditions, both methods have their limitations that must be overcome. (p. 1167) 54.3 Predation has ecological and evolutiona ...
Species Diversity in Pasture Systems
Species Diversity in Pasture Systems

... Ecologists, by training, have an interest in the role of species diversity in the productivity of pastures. All agricultural systems function within parameters defined by ecological principles. It seems logical that the more closely agricultural systems simulate natural ecosystems, the more likely i ...
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Chapter 7 Reading Questions:

... 33. Why does pioneering succession take so long? ...
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Chapter_5_Community Reading_Questions

... 33. Why does pioneering succession take so long? ...
Chapter 3 - State of New Jersey
Chapter 3 - State of New Jersey

... them begin or continue to deteriorate. The wood turtle and the red headed woodpeckers are both New Jersey state threatened species. New Jersey is home to more then 500 species of vertebrates. Many of these species benefit from the work hunters do. Numerous woodland songbird populations suffer when d ...
Limiting Factors, Competitive Exclusion, and a
Limiting Factors, Competitive Exclusion, and a

... article by Simon A. Levin in The American Naturalist (Levin 1970) that was a revelation to me. In it, Levin articulated many of my own misgivings about having resource competition as the sole basis for understanding species coexistence, and he offered a new vantage from which community organization ...
F2009L02526 F2009L02526
F2009L02526 F2009L02526

... It is typically found in valley bottoms and gentle slopes below 600 m above seal level (asl) (but can occur up to 700 m asl); It is typically treeless with, at most, a sparse tree cover; The vegetation is predominantly native; Dominant1 grasses often form a dense sward; The ecological community occu ...
European Biodiversity, The Private Sector Offer (NXPowerLite
European Biodiversity, The Private Sector Offer (NXPowerLite

... – Atlantic – Continental – Mediterranean – Boreal • Work still to be done on Alpine & Pannonic regions ...
Examples of ecological succession so far concern how communities
Examples of ecological succession so far concern how communities

... Frederic (no ‘k’; the photo caption is wrong) Clements was particularly impressed by what seemed to be the orderliness and predictability of successional sequences like those described by Cowles. The notion of facilitation (he called it ‘reaction of organisms on the environment) struck him as partic ...
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Introduced species



An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.
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