TLS Online TPP Program

#Question id: 11378


Which of the following set of conditions will qualify a species to be considered as critical endangered (EN) as per IUCN criteria?

#Unit 10. Ecological Principles
  1. >90% reduction in population size, <100 km2 area of occupancy, at least 50% estimated extinction risk in three generations.

  2. <2,50 individuals with declining population, <250 mature individuals, at least 20% estimated extinction risk in 20 years

  3. <250 individuals with declining population, <50 mature individuals, at least 50% estimated extinction risk in 10 years.
  4. >90% reduction in population size, <10 km² area of occupancy, at least 50% estimated extinction risk in five generations
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TLS Online TPP Program

#Question id: 11911

#Unit 10. Ecological Principles

Michael Moulton and Stuart Pimm (1986) showed how the success of birds introduced to Tahiti or the Hawaiian Islands was dependent on the morphology of the species already present , find out the correct graph represents, morphological differences and the probability of invasion success ;

TLS Online TPP Program

#Question id: 11912

#Unit 10. Ecological Principles

The success of birds introduced to Tahiti or the Hawaiian Islands was dependent on the morphology of the species already present. If there was a small morphological difference in bill length between the resident and introduced species, then

TLS Online TPP Program

#Question id: 11913

#Unit 10. Ecological Principles

During the rate of succession several factors would be observe at the pioneer as well as climax community;

STAGESCHARACTER
A) Pioneer communityi) Biotic Potential low
B) Climax communityii) Root to Shoot ratio is high
iii) Productivity per biomass is low
iv) Net primary productivity is high
v) P/R ratio is greater than 1
vi) Nutrient cycling is closed
vii) Regeneration ability is more
viii) Resistance ability is more

Match the community stages with its given characters;

TLS Online TPP Program

#Question id: 11914

#Unit 10. Ecological Principles

Alder trees, which harbour nitrogen-fixing bacteria in their roots, provide nitrogen to soils developing on sandbars rivers, this is an example of,

TLS Online TPP Program

#Question id: 11915

#Unit 10. Ecological Principles

Which of the following is the correct prediction about the three types of model such as; Facilitation, Inhibition, Tolerance model.

TLS Online TPP Program

#Question id: 11916

#Unit 10. Ecological Principles

Which one of the following  features of an later community?