Theory of Stoichiometric Intraguild Predation: Algae, Ciliate, and Daphnia.
Bull Math Biol
; 86(7): 79, 2024 May 22.
Article
in En
| MEDLINE
| ID: mdl-38777905
ABSTRACT
Consumers respond differently to external nutrient changes than producers, resulting in a mismatch in elemental composition between them and potentially having a significant impact on their interactions. To explore the responses of herbivores and omnivores to changes in elemental composition in producers, we develop a novel stoichiometric model with an intraguild predation structure. The model is validated using experimental data, and the results show that our model can well capture the growth dynamics of these three species. Theoretical and numerical analyses reveal that the model exhibits complex dynamics, including chaotic-like oscillations and multiple types of bifurcations, and undergoes long transients and regime shifts. Under moderate light intensity and phosphate concentration, these three species can coexist. However, when the light intensity is high or the phosphate concentration is low, the energy enrichment paradox occurs, leading to the extinction of ciliate and Daphnia. Furthermore, if phosphate is sufficient, the competitive effect of ciliate and Daphnia on algae will be dominant, leading to competitive exclusion. Notably, when the phosphorus-to-carbon ratio of ciliate is in a suitable range, the energy enrichment paradox can be avoided, thus promoting the coexistence of species. These findings contribute to a deeper understanding of species coexistence and biodiversity.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Predatory Behavior
/
Ciliophora
/
Food Chain
/
Daphnia
/
Mathematical Concepts
/
Models, Biological
Limits:
Animals
Language:
En
Journal:
Bull Math Biol
Year:
2024
Document type:
Article
Affiliation country:
Country of publication: