Population and Sustainability- MODULE 6 Flashcards

Question

how are the effects of human activities controlled in THe Galapagos islands

Answer 1

-Eradication programmes remove wild goats from smaller islands, wild dogs from larger islands -Quinine trees kept in check using chemical herbicides and uprooting young trees -Marine protected area around islands, sets limits and controls on fishing -When visiting, no bringing live plants or animals , no moving them between islands. only visit with licenced guide

Answer 2

-Internally protected by the Antartic Treaty + is treated as a native reserve -Commerical whaling banned completey in 1994 in surrounding oceans -Seal hunting banned -Fishing occours within limit set by scientists -All waste (food waste) + sewage must be taken away by a ship+ have to treat sewage before release -Tourist restrictions -ships banned from using thick oil

Answer 3

replanting native tree species

Answer 4

power station located inside mountain

Answer 5

period of slow growth -the small numbers of individuals that are initially present reproduce, increasing the total population. For population size to increase, the birth rate is higher than the death rate

Answer 6

period of rapid growth. number of breeding indivs increses, total population multiplies exponentially. no constraints act to limit population explosion

Answer 7

A stable state, Further population growth is prevented by external constraints. During this time, the population size fluctuates, but overall its size remains relatively stable -Birth rates and death rates are approximately equal slight fluctuations can by accounted for by fluctuations in limiting factors e.g presence of predators

Answer 8

factors that have an effect on the whole population regardless of its size. can dramatically change pop. size e.g: earthquakes, fires volcanic eruptions, storms

Answer 9

where two species are competed for limiting resources, the one that is better adapted to use their resources more effectively will ultimately eliminate the other

Answer 10

between red and grey squirrels for food and territory in Uk. Grey squirrel native to north America brought into UK (1870s). Population rapidly increased and resulted in native red squirrel disappearing from many areas. This is primarily because grey squirrels can eat a wider range of food and can store more fat as it is larger than red squirrel . This increases its chances of survival and therefore its ability to reproduce, thus increasing its population. increasing pop. of grey squirrels further reduces the food available to red squirrels, reducing their ability to reproduce and survive

Answer 11

1)when a resource is plentiful in a habitat (such as food or space), all organisms have enough of the resource to survive and reproduce. = increase in pop. size 2) because of increased population, many more indivs share the food or space available. Resources now limited: not enough for all organisms to survive. pop. will decrease in size 3) **Less competition** exists as the **smaller population** means less organisms are competing for the same resources. Enough resources for all organisms. Means more organisms survive and reproduce, resulting in pop. growth. cycle events repeat

Answer 12

1)Increase in prey pop. provide more food for predators. Allow more to survive and reproduce. increase predator pop. 2)Increased predator pop. eats more prey organisms , causing a decrease in prey pop. Death rate of prey pop. is higher than its birth rate 3)Reduced prey pop. can no longer support large predator pop. Intraspecific competition for food increases, resulting in a decrease of size predator pop. 4) reduced predator numbers results in less prey population being killed. More prey organisms survive and reproduce , increasing prey population. cycle begins again

Answer 13

-availability of food plants for prey -presence of other predators -seasonal changes causing change in abiotic factors

Answer 14

economic social ethical

Answer 15

-all organisms have right to exist -most play important role within ecosystem -we should not have right to decide which organisms survive and which to live without -moral responsibility for future generations to conserve wide variety of existing natural ecosystems

Answer 16

-provide resources humans need to survive -provide income -

Answer 17

-many people enjoy **natural beauty** of wild ecosystems as well as using them for **activities** which are beneficial to **health** = relaxation , exercise

Answer 18

Convention on International Trade in Endangered Species

Answer 19

Rio Convention on Biological Diversity

Answer 20

Countryside Stewardship scheme

Answer 21

-sustainable beauty of countryside - maintain footpaths and remove litter/provide bins - improve habitats for animals - Preserve archeological and historical sites

Answer 22

-sustainable use of organisms/habittats, ecosystems -share genetic resources -share scientific knowlege -promote ex situ conservation -Raise the profile ogf biodiversity with governments international cooporation on diversity issues

Answer 23

-Regulate and moniter trade in selected species -ensure trade in animals does not threaten wild populations -prohibit the commercial trade of wild plants -allow artificially propogated plants to be sold -less endangered plants can be traded