Biodiversity Flashcards

Flashcards about key concepts related to biodiversity.

What three elements does the term biodiversity refer to?

The variety of genes, species, and habitats.

Name 2 level of biodiversity.

Species and habitat

Species → richness and evenness of a species / the number of different species in an ecosystem

Habitat→ The number of different habitats / a range of different habitats in an area

What is species evenness?

The relative number of individuals of each species in an ecosystem.

What is species richness?

The number of species in an area.

What might happen to an ecosystem if black oak trees died out?

The ecosystem would likely be significantly affected, as black oak trees are a keystone species.

Reduction in diversity

How could the sampling method of animals in a river be improved to obtain more valid results?

Improve the sampling method by taking multiple samples at different locations and times to account for variations in species distribution.

Outline an unbiased sampling method to measure plant biodiversity in a grassland.

Use random quadrats: Divide the grassland into a grid,

use a random number generator to select coordinates, and place quadrats at these coordinates to sample plant species.

use measuring tape , right angle / use grid

Use identification key , repeat experiment at different seasons of time

, detailed method of experiment

Describe two improvements to a student's plan to sample plant species for assessing biodiversity.

Increase sample size: Collect data from more coordinates to obtain a more representative sample. Ensure random sampling: Verify that coordinates are truly random to avoid bias.

What type of sampling method is described by these students' actions: Moving North from a large solitary tree in the school field, some students studied changes in plant species. They laid a tape measure due North from the base of the tree trunk and dropped a quadrat at 1m intervals for 15m.

Systematic.

What is one economic benefit of high biodiversity in tropical rainforests?

High plant biodiversity supports drug discovery and development.