Communities of more than three species

Index

1. Types of complex communities

   1. Competitive communities

   2. Food web

2. May's paradigm

3. Are Specis-rich communities robust to abrupt enviromental changes?: "Catastrophic shifts"

4. Hubbel's unified neutral theory

5. Metacommunity theory

Key questions

• Why, and how, multiple stable states can emerge in species-rich ecosystems remain?

R. May's paradigm

He proposed taht a complex communiny is unstable.

Are Specis-rich communities robust to abrupt enviromental changes?: "Catastrophic shifts"

• Aguadé-Gorgorió et al. (2024) Ecol. Lett. shows that Three factors (1. the fraction of initial conditions that reach a stable state without fluctuations (S ) (Beninca et al., 2008; Hu et al., 2022); 2. the number of observed stable states (Ω), and 3. for each of the states in the list, its diversity of surviving species (D) ) are cues to categorize four types of ecological outcomes (1. Local multistability / 2. Mutual exclusion / 3. Global bistability / 4. Clique).

• Keywords

  • Clique: Small subsets of multiple coexisting species in a species-rich community

<Reference>

• Aguadé-Gorgorió, G., & Kefi, S. (2024). Alternative cliques of coexisting species in complex ecosystems. Journal of Physics: Complexity.

• Aguadé‐Gorgorió, G., Arnoldi, J. F., Barbier, M., & Kéfi, S. (2024). A taxonomy of multiple stable states in complex ecological communities. Ecology Letters, 27(4), e14413.

• Hu, J., Amor, D.R., Barbier, M., Bunin, G. & Gore, J. (2022) Emergent phases of ecological diversity and dynamics mapped in microcosms. Science, 378(6615), 85–89.

• Beninca, E., Huisman, J., Heerkloss, R., Jöhnk, K.D., Branco, P., Van Nes, E.H. et al. (2008) Chaos in a long-term experiment with a plankton community. Nature, 451(7180), 822–825.

A chain length in food web

• Why do chain lengths tend to be short such as two or three chains?

Metacommunity ecology

• Present findings

1. Fragmentation

2. Migration rate

3. Network topology