3.2 Biodiversity/Succession Flashcards
Define
Ecological Succession
the process by which the mix of species and habitat in an area changes over time
Define
Primary Succession
when a new area of land is populated by a group of species for the first time
Define
Secondary Succession
happens when a climax community or intermediate community is impacted by a disturbance
Define
Pioneer Species
the species that first colonize new habitats created by disturbance
Define
Seral Stages
an intermediate stage found in ecological succession in an ecosystem advancing towards its climax community
Define
Climax Community
an ecological community in which populations of plants or animals remain stable and exist in balance with each other and their environment
Define
Species Richness (R)
the count, or total number, of unique species within a given biological community, ecosystem, biome, or other defined area
Define
Species Evenness (E)
a description of the distribution of abundance across the species in a community
Define
Genetic Diversity
the biological variation that occurs within species
Define
Ecological Diversity
the diverse array of ecosystems being seen in a huge geographical location
Define
Keystone Species
a species on which other species in an ecosystem largely depend, such that if it were removed the ecosystem would change drastically.
Define
Invasive Species
a non-native species that causes harm to the environment, economy, or human, animal, or plant health
What is the Shannon-Weiner Index of a community with 5 species, with respective population sizes of 84, 4, 91, 34, and 43?
H = 1.39
What is the species richness of a community with 5 species, with respective population sizes of 84, 4, 91, 34, and 43?
R = 5
What is the species evenness of a community with 5 species, with respective population sizes of 84, 4, 91, 34, and 43?
E = 0.86
