... overharvesting , pollution , destruction of habitat
, introduction of new predators , and other ...
2.1 Genetic and demographic causes
2.3 Predation, competition, and ... as when toxic pollution renders its entire habitat
unlivable; or may occur gradually over thousands ...
... The term habitat
has a number of unrelated meanings:
A concept in Ecology: see habitat
A space habitat
is a self-contained environment supporting some ...
... populations together with areas of suitable habitat
which are currently unoccupied. Each population ... a population boom) are likely to re-colonize habitat
which has been left open by the extinction of ... distributed over many patches of suitable habitat
with significantly less interaction between ...
3 Lifecycle and ecology
4 External links
5 ... which provides the organs with oxygen.
Lifecycle and ecology
Drosophila is found primarily in tropical regions. "The fruit fly, is ...
7.1 ... is the science that explores methods of preserving bodily health .
The conventional view of human evolution states that humans evolved in ...
... organic resources. While most of the species that are becoming extinct are not food species, their biomass is converted into human food when their habitat
is transformed into pasture , cropland and orchards . It is estimated that more than 40% of the Earth's biomass is tied up in only the few ...
Understand environmental changes
Plants can also help us understand changes in on our environment in many ways.
destruction and species extinction is dependent on an accurate and complete catalogue of plants provided systematics and taxonomy .
... by which this may take place. Allopatric speciation begins when subpopulations of a species become isolated geographically, for example by habitat
fragmentation or migration. Sympatric speciation occurs when new species emerge in the same geographic area. Ernst Mayr 's peripatric speciation ...
... parthenogenesis are also more able to settle isolated habitats like oceanic islands, as only a single (female) member of the species has to reach the habitat
to start the population. Another consequence of asexual reproduction, which may have both benefits and costs, is that offspring are typically ...
... a speciation mechanism called allopatry . Allopatry begins when subpopulations of a species become isolated geographically (for example, by habitat
fragmentation or migration). The isolated populations are then liable to diverge evolutionarily over many generations as a) they become subjected to ...
... breeding ranges that abut but do not overlap. This is fairly rare, particularly in temperate regions. The dividing line is often a sudden change in habitat
(an ecotone ) like the edge of a forest or the snow line on a mountain, but can sometimes be remarkably trivial. The parapatry itself indicates that ...