Community Ecology

Community ecology examines how species assemblages organise, interact and function within shared habitats. It addresses the processes that govern species richness and evenness, the structuring of trophic networks and the feedbacks between biotic interactions and abiotic conditions. Central themes include community assembly, where deterministic filters (environmental suitability, competition and mutualisms) and stochastic forces (dispersal limitation and random drift) together shape local diversity; trophic relations, ranging from simple food chains to complex webs featuring omnivory and keystone effects; and successional dynamics, by which disturbance and biotic feedback drive predictable shifts from pioneering colonisers to mature climax states. Recent advances deploy network theory and molecular tracers to reveal hidden interactions and quantify the relative importance of selection versus neutrality. This integrated perspective enables better forecasts of community resilience under land-use change, climate variation and biological invasions, guiding conservation and restoration of ecosystem integrity.

Research from Nature Portfolio

Global surveys of potential phytopathogenic fungi uncovered a mid-latitude diversity peak driven by temperature and moisture regimes, with models projecting substantial increases in pathogen richness and invasion risk in forests and croplands by 2100. A novel top-down framework for keystone-taxon identification bypasses the need for complete pairwise interaction maps, detecting taxa whose perturbation disproportionately alters network structure; applied to human gut data, it revealed keystone modules validated by longitudinal sampling. In an arid savannah, six years of fine-scale rainfall records demonstrated that seven-day precipitation pulses trigger immediate plant cover response followed by sequential peaks in herbivorous, predatory and omnivorous arthropods, highlighting the importance of short-term rain events in structuring multi-trophic communities.

Research from all publishers

In semiarid grasslands, labile soil organic carbon fractions were found to mediate bacterial community assembly during long-term vegetation succession: aggregate size and fertiliser regimes drove habitat specialist diversity and network complexity, while null-model analyses indicated a dominant role for stochastic processes. A global meta-analysis of soil bacteria demonstrated that soil pH is the principal filter determining the stochastic–deterministic balance: extreme acid or alkali conditions yield phylogenetically clustered communities under selection, whereas near-neutral pH fosters stochastic assembly and phylogenetic dispersion. Reviews of microbial co-occurrence networks underscore their power to reveal emergent community properties and stability patterns, providing best-practice guidance for data preparation, network construction and interpretation in microbiome studies.

Community Ecology publication trend

The graph below shows the total number of articles in community ecology across all publications each year (not limited to Nature Index journals).

Technical terms

Community assembly: The process by which species colonise and establish in a habitat under the combined influence of environmental filters and biotic interactions.

Deterministic processes: Predictable drivers of community composition such as niche requirements, competition and mutualistic interactions that favour certain taxa.

Stochastic processes: Random factors—ecological drift, chance dispersal events—that generate variation independent of fitness differences.

Keystone taxon: A species whose presence or absence has a disproportionate effect on community structure and ecosystem function relative to its abundance.

Trophic cascade: A series of indirect effects that predators exert on multiple lower trophic levels, altering prey populations and primary producer biomass.

Null-model framework: A statistical approach that tests whether observed community patterns differ from those expected under random assembly, to infer the roles of specific processes.

References

1. Global diversity and biogeography of potential phytopathogenic fungi in a changing world. Nature Communications (2023).
2. Top-down identification of keystone taxa in the microbiome. Nature Communications (2023).
3. Seasonal and temporal patterns of rainfall shape arthropod community composition and multi-trophic interactions in an arid environment. Scientific Reports (2022).
4. Soil labile organic carbon fractions mediate microbial community assembly processes during long‐term vegetation succession in a semiarid region. iMeta (2023).
5. Soil pH mediates the balance between stochastic and deterministic assembly of bacteria. The ISME Journal: Multidisciplinary Journal of Microbial Ecology (2018).
6. A guide for comparing microbial co‐occurrence networks. iMeta (2023).
7. Networks as tools for defining emergent properties of microbiomes and their stability. Microbiome (2024).