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PDF - Statistics Canada
PDF - Statistics Canada

... orbiculatus) ...
chapter 5 - Avon Community School Corporation
chapter 5 - Avon Community School Corporation

... • BIODIVERSITY • MAIN IDEA: Biodiversity maintains a healthy biosphere and provides direct and indirect value to humans. • WHAT IS BIODIVERSITY? • Biodiversity is the variety of life in an area that is determined by the number of different species in that area. – Biodiversity increases the stabilit ...
Keystone Species Concept
Keystone Species Concept

... Other Indirect Species Interactions • Removal of one species causes other species to be lost from the system •Aka “ripple effect” • When the dodo (a 25 kg pigeon) was exterminated on Mauritius, the tree Calvaria major ceased to recruit. Its seeds needed to be abraded in the dodo’s gizzard to germin ...
General Review for the Quiz
General Review for the Quiz

... _____________________________ Match the interactions with the examples below. a. Anacondas eat gazelles for breakfast. b. Mychorrizae on plants increase surface area of roots while getting some food from the plants. c. Monkeys and gorillas eat the same limited amount of bananas. d. Egrets rest on wa ...
invasives management
invasives management

... INVASIVES MANAGEMENT The article below was included in the April e-News from 2009. We include it again here with some updates. Remember, the most important step in managing invasives is to prevent seeds from setting for next year. A variety of non-native species (aquatic and terrestrial plants, anim ...
Niche
Niche

... Its tolerance limits (e.g. soil pH, humidity) Its requirements for shelter, nesting sites etc etc, all varying through time ...
Ch 56 Notes
Ch 56 Notes

... a. The science of biology is known to create new terms for every new concept, more so than any of the other sciences. Most of the terms come from the Greek language. Knowing some of the key prefixes and suffixes from the Greek you should help to determine and remember the definition of new terms. Us ...
Abiotic=non-living things. Eg: Sunlight, minerals, air, soil, water, etc.
Abiotic=non-living things. Eg: Sunlight, minerals, air, soil, water, etc.

... • After a fire in forest, open area is created – First organisms to establish themselves are members of species that do well in disturbed habitats ...
Species and Populations
Species and Populations

... in parental care. ...
File
File

... ● Today, we know that variation happens as a ...
File
File

... Grey squirrels are better at obtaining food sources AND eat a wider variety of foods ...
HAVE YOU SEEN THIS CRAYFISH?
HAVE YOU SEEN THIS CRAYFISH?

... The Spinycheek crayfish, a non-native species, has recently been found in Freshwater Lake within Cape Breton Highlands National Park. Native to some northeastern States, this is the first time it has been seen in Nova Scotia. ...
The nature of the plant community: a reductionist view
The nature of the plant community: a reductionist view

... Barro Colorado Island: An 1,500 ha island formed when a valley in Panama was dammed to form part of the Panama Canal. It has been used as an example of an area of mainland converted into island status. Numerous ecological studies have been conducted there. The establishment of permanent plots for tr ...
Sampling Techniques
Sampling Techniques

... • Works well for common species • Rare species are usually underestimated or occasionally grossly overestimated • Suggest why? (Imagine using quadrats to count trees on the grass outside business and no, it’s not because they wouldn’t fit over the top.) ...
Chapter 19 Introduction to Ecology
Chapter 19 Introduction to Ecology

... - The study of ecological information has been around for a very long time. - Over the past few decades, humans have changed the environment on a greater scale than ever before in history. 1. The Exploding Human Population - The current world population is: 6,592,491,071 - The increasing population ...
Chapter 48 - Community Ecology
Chapter 48 - Community Ecology

... 6. According to the principle of competitive exclusion, what outcome is expected when two species (or businesses) with identical niches compete for a resource? Why? 7. Describe what is meant by a “foundation” species and identify one example. 8. Describe what can happen when a keystone species is re ...
biological diversity and its loss
biological diversity and its loss

... widely separated sites, and led the Alvarezes and their cof(eagues to postulate an extraterrestrial source for this iridium--specifically,meteorites that stmck the earth in a cataclysm that produced mass extinctions. Others have postulated a 26-million-year periodicity of extinctions, based on the r ...
Chap 13 - CRCBiologyY11
Chap 13 - CRCBiologyY11

... organic matter that contains chemical energy. Detritivores are animals that eat detritus. They differ from decomposers as they release enzymes onto the detritus, partially breaking it down, and then they absorb some of the products. ...
Species Richness: The number of species present in a community
Species Richness: The number of species present in a community

... eventually becomes extinct. Factors of background extinction include gradual changes in temperature, humidity, predator-prey relationships, and tectonic plate movements. It is estimated that the average species stays around for 4 -22million years before it becomes extinct and that 99.9 of all the sp ...
1 - cloudfront.net
1 - cloudfront.net

... Directions: Complete the following as you watch the Ecological Succession PowerPoint. 1. What is succession? 2. Give examples of abiotic factors that can cause change in a community. 3. Give examples of biotic factors that can cause change in a community. 4. The first organisms to arrive during prim ...
What Traits Distinguish Invasive Plants from Non-invasive - Cal-IPC
What Traits Distinguish Invasive Plants from Non-invasive - Cal-IPC

... pest species) have invaded after being introduced on other continents or islands while only 15% of the species that do not invade in the U.S. have invaded elsewhere. In Region 14, 78% of the invaders and only 7% of the non-invaders are established elsewhere. Prior history of invasions is one of thre ...
Document
Document

... reintroducing the species without human interference. We can explore other variables that may cause their extirpation. We need this knowledge in order to preserve other species, including ourselves > Preservation of species diversity > Enhancement of an existing population to maintain the ecosystem’ ...
Pocket Field Guide to Kentucky`s Common Weeds and Other
Pocket Field Guide to Kentucky`s Common Weeds and Other

... careful that the plant does not spread and compete with native plants that are more nutritious and less invasive. Some of the plants listed here may require professional identification prior to treatment for control, in order to protect closely related native species. Contact your County Cooperative ...
chapter 54 reading guide
chapter 54 reading guide

... Which category above includes the other three? Note that other texts may define this term more narrowly. ...
Practice Exam IV
Practice Exam IV

... a. is equal to the standing crop of an ecosystem b. is limited by light, nutrients, and moisture in all ecosystems c. is the amount of light energy converted to chemical energy per unit time in an ecosystem d. is inverted in some aquatic ecosystems e. is all of the above 36. Which of the following i ...
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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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