MODULE 8 Flashcards
(22 cards)
Transfer of pollen from the ______ of a flower to a _______.
pollination
- anther to stigma
type of ecosystem service
REGULATING SERVICES
- regulation of climate, water, and some human diseases
- Inherent right of species to exist
- Moral duty to pass on our biological resources in good form to our future children
- Life forms should be conserved simply because they exist
intrinsic value
threats to biodiversity
- habitat loss and fragmentation
- overexploitation
- pollution
- invasive species
- climate change
- species extinction
Building of different structures may threaten biodiversity
habitat loss and fragmentation
Overharvesting of natural resources and plant and animal species at a rate faster than they can reproduce.
overexploitation
- Toxic synthetic chemicals and products enter ecosystems
- Nutrient loading
pollution
Non-native species that are accidentally or intentionally introduced threatening local biodiversity.
invasive species
Increase in greenhouse gas emission causes world temperature to rise.
climate change
Failure of the species to adapt with the changing environment brought by different environmental factors.
species extinction
SPECIES EXTINCTION IN THE PHILIPPINES
In 2004, the Philippines listed:
- ___ land mammal species
- ___ avian species
- ___ reptile species
- ___ amphibian species as endangered species.
- 42 land mammal species
- 127 avian species
- 24 reptile species
- 14 amphibian species as endangered species.
An administrative order was issued on 2007 by the DENR creating a list of threatened plant species in the nation. This states that:
- ___ species are critically endangered
- ___ endangered
- ___ vulnerable
- ___ threatened
- 99 species are critically endangered
- 187 endangered
- 176 vulnerable
- 64 threatened
IUCN’S Red List
- extinct (ex)
- extinct in the wild (ew)
- critically endangered (cr)
- endangered (en)
- vulnerable (vu)
- near threatened (nt)
- least concern (lc)
- data deficient (dd)
- not evaluated (ne)
species in which the last individual has died or where systematic and time-appropriate surveys have been unable to log even a single individual
extinct (ex)
species whose members survive only in captivity or as artificially supported populations far outside their historical geographic range
extinct in the wild (ew)
critically endangered (cr)
species that possess an extremely high risk of extinction as a result of rapid population declines of ___ to more than ___ percent over the previous ___ years (or three generations), a current population size of fewer than ___ individuals, or other factors
critically endangered (cr)
- 80 to more than 90 percent
- 10 years or three generations
- fewer then 50 indivs
endangered (en)
species that possess a very high risk of extinction as a result of rapid population declines of ___ to more than ___ percent over the previous ___ years (or three generations), a current population size of fewer than ___ individuals, or other factors
endangered (en)
- 50 to more than 70 percent
- 10 years or three generations
- fewer than 250 individuals
vulnerable (vu)
species that possess a very high risk of extinction as a result of rapid population declines of ___ to more than ___ percent over the previous ___ years (or three generations), a current population size of fewer than ___ individuals, or other factors
vulnerable (vu)
- 30 to more than 50 percent
- 10 years (or three generations)
- fewer than 1,000 individuals
species that are close to becoming threatened or may meet the criteria for threatened status in the near future by the IUCN.
near threatened (nt)
a category containing species that are pervasive and abundant after careful assessment
least concern (LC)
a condition applied to species in which the amount of available data related to its risk of extinction is lacking in some way.
Consequently, a complete assessment cannot be performed. Thus, unlike the other categories in this list, this category does not describe the conservation status of a species.
data deficient (dd)
a category used to include any of the nearly 1.9 million species described by science but not yet assessed by the IUCN.
not evaluated (ne)
