populations and sustainability Flashcards
whys it conservation and not preservation
as people are working there for sustainable production of
carrying out active measures to maintain bidoiversity
coppicing
where trunk is cut close to ground level
several new shoots grow out from cut surface
protect young shoots from grazers
process is repeated
rotational coppicing
beneficial as new stems grow more rapidly
the lifespan of the tree extended
provides variety of habitats
less soil erosion
maintains soil quality
more light for smaller plants
sustainable development
creating products that meet the needs of our current population whilsst ensuring to minimise negative impact for future populations so resources are conserved
ecosystem
living and nonliving components in habitat and their interactions
primary succesions
when a previously uncolonized area is colonised by a pioneer species and its population undergoes a series of stages.
deflected succesion
caused by grazing burning mowing and application of fertiliser
sustainable timber production
use wood sustainably from coppicing or pollarding(cutting higher up)if animals are present
dont use clear felling as it leads to soil erosion instead use selective felling where only diseased trees are removed. Good as it maintains biodiversity, reduce soil erosion,prevents disruption to ecosystems
why do plants need nitrates
need nitrates to make amino acids for proteins such as enzymes to make rna and dna need nitrates to make chlorophyll and cytoplasm
sustainable fishing
fishing quotas
mesh size
public education
penalties/sanction
producers
photosynthesise to make food
consumer
feeds on other organisms
trophic level
stage in food chain/web
role of decomposers
saprotrophic digestion occurs by enzymes. Breakdown products are absorbed releasing co2 and water. Protein breakdown makes ammonium.
Galapagos island
tortoise are hunted
lizards are predated by cats
