Biodiversity - Tri 1 Lect 1
- Created by: Loz1669
- Created on: 30-12-19 17:01
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- Biodiversity
- Biodiversity can either refer to genetic diversity or taxonomic diversity
- A species consists of populations of organisms that can reproduce with one another and that are reproductively isolated from other such populations.
- Phylogenetics is the study of of evolutionary relationships between organisms
- Outcomes of evolutionary process:
- Adaptation.
- Speciation
- Extinction
- Outcomes of evolutionary process:
- Binomial nomenclature: Genus and Species.
- Hierarchy: Domain Kingdom, Phylum, Class, Order, Family, Genus and Species (dumb king phillip cried out for goodness sake)
- Additional ranks can be added such as sub-genus and super family
- Hierarchy: Domain Kingdom, Phylum, Class, Order, Family, Genus and Species (dumb king phillip cried out for goodness sake)
- Phylogenetics is the study of of evolutionary relationships between organisms
- A species consists of populations of organisms that can reproduce with one another and that are reproductively isolated from other such populations.
- Why do we measure biodiversity?
- To identify hotspots and health of ecosystems
- An obvious measurement is species diversity of a particular area
- Species Diveristy
- Species richness
- How many species are present
- Species evenness
- Relative abundance of species present
- Species richness
- An issue with study: time period used for the study. Samples must be standardised so we must make sure there are no differences in sampling effort.
- Quadrats and Transects
- Species might not be sampled due to: elusive, present in low numbers or areas weren't sampled, only present at certain times of the year, cryptic (hard to distinguish between species.), Problems with sampling technique e.g wrong bait in traps, luck or randomness, species accumulation curve (curve that counts number of species we find as sampling effort increases.)
- Species accumulation/discovery curve
- Species Diveristy
- Biodiversity can either refer to genetic diversity or taxonomic diversity
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