SORU: aşağıdaki parçaya göre cevaplayınız
It is stated in the passage that ----.
Species diversity provides the foundation for individual
ecosystems and thus is the prerequisite for the
functioning of the biosphere. It is an immeasurable
source of food and medicinal products, and an
irreplaceable resource as a gene pool. Due to the
increasing destruction and pollution of natural habitats,
over-fishing and hunting, humans are destroying the
biological multitude of life, and with that, the basis of
their own well-being. The public is concerned when a
well-known species like the tiger, whale, or mountain
gorilla becomes endangered; however, the majority of
other cases are hardly ever noticed by the public. Apart
from the decline of species diversity within habitats, loss
of genetic diversity within individual species has also
been observed. The destruction of individual
populations leads to a reduction in genetic regeneration
capacity within a species. For instance, selective
deforestation reduces the quality of the genetic material
of affected tree species, since only strong, healthy trees
are logged and the weaker ones are left behind.
Humankind’s intentional or unintentional introduction of
exotic animal and plant species to new habitats plays
an important role as well. These so-called “neozic
species” can become a threat to local species and lead
to their complete extinction. For instance, the flightless
Kiwi bird in New Zealand is threatened with extinction
by introduced rats and feral cats.