Advanced Biogeography Course

Lesson 1 • History of Biogeographic Thought

Traces ideas from early naturalists through modern synthesis. Understanding this history reveals why current methods and debates exist.

Lesson 2 • Defining Biogeography and Its Scope

Biogeography is defined as the study of species distributions across space and time. This anchors all subsequent topics by clarifying disciplinary boundaries.

Lesson 3 • Units of Biogeographic Analysis

Covers species, populations, lineages, and biotic regions as analytical units. Choosing the right unit determines which methods are appropriate.

Lesson 1 • Vicariance and Continental Drift

Explains how landmass separation isolates populations and drives divergence. Vicariance is contrasted with dispersal as an explanatory mechanism.

Lesson 2 • Sea-Level Change and Land Bridges

Examines glacial cycles, eustatic sea-level shifts, and ephemeral land bridges. These events explain disjunct distributions across currently separated landmasses.

Lesson 3 • Geological Time and Fossil Evidence

Introduces the geological timescale and fossil record as biogeographic data sources. Fossils calibrate divergence times and document past range occupancy.

Lesson 4 • Paleoclimate and Habitat Shifts

Covers how past climates altered biome boundaries and refugia locations. Paleoclimate data are essential for interpreting fossil and molecular biogeographic evidence.

Lesson 1 • Dispersal Ability and Range Limits

Quantifies how dispersal capacity interacts with barriers to set range boundaries. Poor dispersers show sharper range limits than strong dispersers.

Lesson 2 • Soil, Substrate, and Edaphic Factors

Examines how soil chemistry, texture, and geology restrict plant and animal ranges. Edaphic specialization creates sharp distribution boundaries independent of climate.

Lesson 3 • Biotic Interactions and Realized Niche

Covers competition, predation, mutualism, and parasitism as range-limiting forces. The realized niche is smaller than the fundamental niche due to these interactions.

Lesson 4 • Disturbance Regimes and Range Dynamics

Analyzes fire, flooding, and other disturbances as drivers of range expansion and contraction. Disturbance history explains many patchy distribution patterns.

Lesson 1 • Oceanic Islands as Evolutionary Laboratories

Examines adaptive radiation, founder effects, and rapid speciation on oceanic islands. Islands amplify evolutionary processes visible over short timescales.

Lesson 2 • Habitat Islands and Conservation Applications

Extends island theory to forest fragments, mountaintops, and urban patches. These applications link theory directly to reserve design principles.

Lesson 3 • Species-Area Relationships

Derives the power-law species-area curve and its parameters. This relationship is the quantitative backbone of island biogeography and conservation planning.

Lesson 4 • Island Size, Isolation, and Diversity

Tests model predictions using area and distance as independent variables. Empirical patterns confirm and refine the equilibrium model.

Lesson 1 • Comparative Phylogeography

Compares phylogeographic patterns across multiple co-distributed species simultaneously. Shared vs. idiosyncratic patterns reveal community-level vs. species-specific history.

Lesson 2 • Molecular Markers in Biogeography

Surveys mitochondrial DNA, microsatellites, and SNPs as phylogeographic tools. Marker choice affects resolution of population-level vs. species-level patterns.

Lesson 3 • Phylogeographic Breaks and Barriers

Identifies concordant genetic breaks across co-distributed species as evidence of shared barriers. Concordance strengthens vicariance interpretations over dispersal.

Lesson 4 • Haplotype Networks and Gene Trees

Constructs and interprets haplotype networks to infer population history. Gene trees are distinguished from species trees to avoid analytical errors.

Lesson 1 • Interpreting SDM Outputs Biogeographically

Translates model outputs into hypotheses about range shifts, refugia, and invasion risk. SDM results are integrated with phylogeographic and fossil evidence.

Lesson 2 • Projecting Models in Space and Time

Projects calibrated models onto past climates and future scenarios. Extrapolation risk is quantified using multivariate environmental similarity surfaces.

Lesson 3 • Modeling Algorithms and Assumptions

Compares MaxEnt, GLM, BRT, and ensemble approaches for niche estimation. Each algorithm carries assumptions about presence-only vs. presence-absence data.

Lesson 4 • Occurrence Data and Environmental Layers

Covers data sources, georeferencing, and spatial thinning of occurrence records. Environmental layers must match the spatial and temporal scale of occurrence data.

Lesson 1 • Integrating Historical and Ecological Methods

Combines SDM projections, phylogeographic breaks, and historical biogeography into unified narratives. Integration resolves conflicts between ecological and historical signals.

Lesson 2 • Area Cladograms and Taxon-Area Relationships

Converts species phylogenies into area cladograms by replacing taxa with their distributions. Congruence among area cladograms signals shared biogeographic history.

Lesson 3 • Ancestral Area Reconstruction

Estimates the geographic origin of lineages on time-calibrated phylogenies. Results are interpreted alongside geological and paleoclimate evidence.

Lesson 4 • Event-Based Methods: DIVA and BioGeoBEARS

Uses dispersal-vicariance analysis and likelihood-based models to assign costs to biogeographic events. Model comparison selects the best-fit biogeographic process.

Lesson 1 • Climate Change and Range Shifts

Quantifies observed and projected range shifts, phenological mismatches, and local extinctions. SDM projections from Chapter 6 are applied to forecast future distributions.

Lesson 2 • Reserve Design Using Biogeographic Principles

Applies island biogeography, species-area relationships, and connectivity theory to reserve design. Design decisions directly affect long-term species persistence.

Lesson 3 • Biodiversity Hotspots and Priority Setting

Evaluates hotspot criteria including endemism, threat, and irreplaceability for conservation prioritization. Hotspot designation guides resource allocation under limited budgets.

Lesson 4 • Invasive Species and Biogeographic Barriers

Analyzes how invasive species breach natural barriers and alter native community structure. Biogeographic tools predict invasion risk and identify vulnerable regions.

Lesson 5 • Monitoring and Adaptive Management

Designs biogeography-informed monitoring programs to detect range changes and conservation outcomes. Adaptive management loops integrate new data into revised strategies.