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Ecological Components of Biodiversity & Global Biodiversity

Lecture on ecology of biodiversity
by

Jennifer Dever

on 5 September 2017

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Transcript of Ecological Components of Biodiversity & Global Biodiversity

Ecological Components of Biodiversity & Global Biodiversity Patterns
Ecosystems & Communities
"Civilization is a state of mutual interdependent cooperation between human animals, other animals, plants, and soils, which may be disrupted at any moment by the failure of any of them" - Leopold
Global patterns of biodiversity
Latitude
Elevation
Precipitation
Habitat Heterogeneity
Area
Biomes
major types of ecosystems that occupy broad geographic regions, impacted by climate, geology & geography
Future of Biodiversity Studies
cataloging the millions of species left undescribed
zero in on areas with high richness & endemism (RAP) rapid assessment program
establish research stations in hotspots
Ecology Review
Ecosystems
Population
Community
Trophic structure
Food Web
Niche
Ecologically functional species / group

Productivity
Gross productivity = amt of energy trapped in organic matter during a specified interval at a given trophic level
Productivity is higher in more diverse natural communities - because differences among species in resource capture allows more diverse communities to more fully utilize their limiting resources
Functionality - Ecosystem processes, e.g. soil development, nutrient cycling, water filtration and storage
Healthy Ecosystem
Stable Ecosystem
Resistance
Resilience
Ecosystem Dynamics
Measuring Biodiversity
S = Species Richness
E = Evenness
Diversity Index
alpha diversity = local species richness
beta diversity = measure of variation among sites within a region
gamma diversity = regional richness
Biodiversity Hotspots
Full transcript