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s.91 Threatened Species Application
s.91 Threatened Species Application

... ecological community such that its local occurrence is likely to be placed at risk of extinction. If plants need to be removed as part of this project, the loss will be limited to a few individuals out of a total area of 7.8ha. This is not likely to have either of the above impacts. Additionally, bu ...
Possums reclassified as “endangered”. Western Ringtail Possum
Possums reclassified as “endangered”. Western Ringtail Possum

... status should change to critically endangered, a status which would have more accurately reflected the dire circumstances that this species finds itself in due to anthropogenic changes to its environment: clearing for development, feral and domestic animal predation, logging, and large scale inappro ...
The Sixth Mass Extinction
The Sixth Mass Extinction

... sixth mass extinction. The loss of species is about losing the very web of life on Earth. People trying to save critical habitat have been dismissed or ridiculed as sentimental “tree-huggers” who want to save the “spotted owls,” even if it costs jobs. Most Americans have little idea of the magnitude ...
122 [Study Guide] 25-2 The History of Life
122 [Study Guide] 25-2 The History of Life

... Tropical rain forests harbor many undiscovered species. Clear-cutting such an area may drive a species to extinction before we know of its existence. ...
Island Biogeography - University of Windsor
Island Biogeography - University of Windsor

... The island of Singapore • On the island of Singapore, habitat loss over the past 183 years exceeded 95%! Corresponding with this decline was a massive documented or inferred loss of biodiversity. • Losses were highest for forest specialists (34-87% of taxa extinct) in taxa like butterflies, birds, ...
Ecosystems - physicslocker.com
Ecosystems - physicslocker.com

... Extinction can cause a decrease in biodiversity. Biodiversity is the number and variety of organisms found in an area. Conserving biodiversity is important as every living thing plays a vital role in an ecosystem. If one species becomes extinct this can have a huge impact on the rest of the communit ...
full text pdf
full text pdf

... global biocapacity by 50% and now lives unsustainabily by depleting stocks of natural capital. Actually, global growth is using about 1.5 Earths (MCLELLAN, 2014). Because we have only one planet it makes a rather significant problem. It is worth mentioning that if you cut down more trees than you gr ...
Threatened Species Art Competition Teacher
Threatened Species Art Competition Teacher

... species are at risk from a range of threatening processes such as habitat loss and fragmentation, competition with and predation by introduced species and disease. The populations of some of these species have significantly declined to the point that they are at risk of extinction in the immediate t ...
Chapter5- Evolution, Biodiversity, and Population
Chapter5- Evolution, Biodiversity, and Population

... nutrient flow - Interactions with other individuals ...
Species Coextinctions and the Biodiversity Crisis
Species Coextinctions and the Biodiversity Crisis

... Rapid population declines and extinctions of species following the widespread destruction of natural habitats have been reported across the natural world (1). Up to 50% of species are predicted to be lost in the next 50 years (2, 3). This seemingly inevitable biodiversity crisis has galvanized the s ...
Species Coextinctions and the Biodiversity Crisis
Species Coextinctions and the Biodiversity Crisis

... Rapid population declines and extinctions of species following the widespread destruction of natural habitats have been reported across the natural world (1). Up to 50% of species are predicted to be lost in the next 50 years (2, 3). This seemingly inevitable biodiversity crisis has galvanized the s ...
Modelling the extinction of Steller`s sea cow
Modelling the extinction of Steller`s sea cow

... visited Bering Island and collected records of all Russian hunting and trading expeditions known to have overwintered there, including crew numbers and duration of stay (table 1; figure 1). One report, reproduced by Domning (1978), states that one sea cow could feed 33 men for a month, and it was cu ...
Synergies among extinction drivers under global change
Synergies among extinction drivers under global change

... the coup de grâce because stochastic processes can then take over (the small population paradigm) [4,6]. Even though strong correlates of threat risk as indicated, for instance, by International Union for Conservation of Nature and Natural Resources (IUCN) status (http:// www.iucnredlist.org), have ...
Human Impact on Resources and Ecosystems
Human Impact on Resources and Ecosystems

... About 80% to 90% of threatened species are under threat because of habitat loss or fragmentation. The primary activities that result in habitat loss are: Farming ™ Forestry ™ Grazing by livestock ™ Modification of aquatic habitats ™ Conversion to urban and industrial landscapes ...
Artificial Habitats
Artificial Habitats

... autoecological; may only marginally dealt with them sinecological studies approaches. From the perspective of conservation are especially practical, applied, for example, specific problems of threatened or endangered. However, in more general studies, holistic or ecological scaling the two previous ...
A PENGUIN SPECIES EXTINCT 500 YEARS AGO
A PENGUIN SPECIES EXTINCT 500 YEARS AGO

... - how long ago is this extinction thought to have occurred? - how did the Otago University research team unintentionally find out about this extinction? - what did the DNA evidence tell them about this new species? - what was the probable cause of the extinction and when did it bec ...
Drivers of Species diversity
Drivers of Species diversity

... m2]quadrats used implies both appearance and disappearance [of species] from these quadrats.” "We postulate that in homogeneous, grazed, nutrient- and water-deficient environments many species can reach virtually all microsites within the plot, which we express through the idea of the ‘carousel mode ...
1 Biology 413 (Zoogeography) Final Exam Winter Term 2
1 Biology 413 (Zoogeography) Final Exam Winter Term 2

... of intraspecific diversity, and thus evolutionary potential for adaptation. EDGE species are recognized for the amount of unique evolutionary history that they represent, as well as their level of endangerment (e.g., based on the IUCN). For EDGE species, we ask how much evolutionary history would be ...
Change over Time
Change over Time

... certain point, it may not be able to recover One way that this can happen is if a species becomes isolated, cut off geographically from others of its species Another way is habitat loss, when land area available for a species to live decreases due to human activity ...
Chapter 5: Biodiversity and Conservation
Chapter 5: Biodiversity and Conservation

... Habitat Loss If a habitat is destroyed or disrupted, the native species might have to relocate or they will die. Destruction of habitat - such as the clearing of tropical rainforests, has a direct impact on global biodiversity. Disruption of habitat - the declining population of one species can aff ...
Habitat fragmentation and biodiversity collapse in neutral communities
Habitat fragmentation and biodiversity collapse in neutral communities

... sites. Better colonizers have greater extinction rates and tend to persist less on a site. There is a fair amount of evidence from many plant communities for a trade-off between competitive strength, i.e, the ability to persist, and dispersal, i.e, colonization ability (Lehman and Tilman, 1997). In ...
Applying Reconciliation Ecology Concepts To Salmonid Habitat
Applying Reconciliation Ecology Concepts To Salmonid Habitat

... Applying Reconciliation Ecology Concepts To Salmonid Habitat Restoration And Enhancement ...
Lecture 16: Imperiled and extinct fishes
Lecture 16: Imperiled and extinct fishes

... -142 extinctions (2%) which is pretty low - but why? - habitat degradation, primarily through loss of connectivity (urbanization, hydropower ...
Habitat Fragmentation
Habitat Fragmentation

... • Fragmentation eliminates habitat for those species requiring large unbroken blocks of habitat (e.g., bobcats and grizzly bears, deer). • Additionally, the small habitat patches resulting from fragmentation often do not provide the food and cover resources for many species that do attempt to use th ...
Habitats and Niches
Habitats and Niches

... avoids competition; Realized niches divide resources (insects) among several species  woodpeckers, nuthatches, & creepers. Each species evolved & adapted to specialized diet. ...
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Extinction debt

In ecology, extinction debt is the future extinction of species due to events in the past. Extinction debt occurs because of time delays between impacts on a species, such as destruction of habitat, and the species' ultimate disappearance. For instance, long-lived trees may survive for many years even after reproduction of new trees has become impossible, and thus they may be committed to extinction. Technically, extinction debt generally refers to the number of species in an area likely to go extinct, rather than the prospects of any one species, but colloquially it refers to any occurrence of delayed extinction.In discussions of threats to biodiversity, extinction debt is analogous to the ""climate commitment"" in climate change, which states that inertia will cause the earth to continue to warm for centuries even if no more greenhouse gasses are emitted. Similarly, the current extinction may continue long after human impacts on species halt.Extinction debt may be local or global, but most examples are local as these are easier to observe and model. It is most likely to be found in long-lived species and species with very specific habitat requirements (specialists). Extinction debt has important implications for conservation, as it implies that species may go extinct due to past habitat destruction, even if continued impacts cease, and that current reserves may not be sufficient to maintain the species that occupy them. Interventions such as habitat restoration may reverse extinction debt.Immigration credit is the corollary to extinction debt. It refers to the number of species likely to immigrate to an area after an event such as the restoration of an ecosystem.
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