Ecology Expert

---
name: ecology-expert
version: 1.0.0
description: Expert-level ecology covering population ecology, community ecology, ecosystem ecology, food webs, energy flow, nutrient cycling, biodiversity, and conservation biology.
author: luo-kai
tags: [ecology, ecosystems, populations, biodiversity, conservation, food webs]
---

# Ecology Expert

## Before Starting
1. Population, community, or ecosystem level?
2. Terrestrial, aquatic, or marine system?
3. Basic ecology or conservation/applied focus?

## Core Expertise Areas

### Population Ecology
Population growth: exponential (dN/dt = rN) and logistic (dN/dt = rN(K-N)/K).
Carrying capacity K: maximum population size environment can support.
Life tables: age-specific survival (lx) and fecundity (mx), net reproductive rate R0.
Population regulation: density-dependent (competition, predation) vs density-independent.
Metapopulation: network of subpopulations connected by dispersal, patch dynamics.

### Community Ecology
Species interactions: competition, predation, herbivory, mutualism, commensalism, parasitism.
Competitive exclusion: two species with identical niches cannot coexist indefinitely.
Niche theory: fundamental vs realized niche, niche partitioning enabling coexistence.
Keystone species: disproportionate effect on community structure relative to abundance.
Succession: primary and secondary, pioneer to climax communities.

### Ecosystem Ecology
Energy flow: trophic levels, 10% rule, primary productivity (GPP, NPP).
Nutrient cycling: carbon, nitrogen, phosphorus cycles — reservoirs and fluxes.
Trophic cascades: top-down effects of apex predators on lower trophic levels.
Decomposition: detritivores, decomposers, mineralization of organic matter.

### Biodiversity
Alpha diversity: species richness and evenness within a habitat (Shannon, Simpson).
Beta diversity: species turnover between habitats (Bray-Curtis, Jaccard).
Gamma diversity: total diversity across a region.
Species-area relationship: S = cA^z — islands and habitat fragments.

### Conservation Biology
Extinction risk: IUCN Red List criteria, minimum viable population.
Habitat fragmentation: edge effects, corridors, landscape connectivity.
Invasive species: competitive displacement, novel weapons hypothesis.
Climate change impacts: range shifts, phenological mismatches, coral bleaching.

## Key Patterns



## Best Practices
- Define spatial and temporal scale clearly in ecological studies
- Use multiple diversity indices — richness alone is insufficient
- Account for detection probability in species surveys
- Consider indirect effects and non-linearities in food web models
- Distinguish correlation from causation in observational ecology

## Common Pitfalls
| Pitfall | Fix |
|---|---|
| Ignoring scale dependence | Patterns differ at local vs regional vs global scales |
| Assuming equilibrium | Many ecological systems are non-equilibrium |
| Overlooking indirect interactions | Trait-mediated indirect effects can dominate |
| Confusing correlation with competition | Test with removal experiments |

## Related Skills
- evolutionary-biology-expert
- marine-biology-expert
- earth-sciences/climatology-expert
- physiology-expert