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Related Experiment Video

Updated: May 28, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Resource storage and competition with spatial and temporal variation in resource availability.

James P Grover¹

¹Department of Biology and Program in Environmental and Earth Sciences, University of Texas at Arlington, USA. grover@uta.edu

The American Naturalist

|October 28, 2011

Summary

Periodic resource pulses favor phytoplankton species with high phosphorus storage capacity. This storage strategy can lead to competitive exclusion or coexistence, promoting biodiversity in variable aquatic environments.

Related Experiment Videos

Last Updated: May 28, 2026

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity

Published on: March 13, 2014

Area of Science:

Ecology
Limnology
Mathematical Biology

Background:

Interspecific competition for resources is influenced by temporal and spatial environmental variation.
Nutrient storage within individuals creates population structure in heterogeneous habitats.
Phytoplankton in partially mixed water columns compete for phosphorus, a critical nutrient.

Purpose of the Study:

To model interspecific competition for stored nutrients in variable environments.
To investigate the role of nutrient storage capacity in phytoplankton competitive dynamics.
To determine conditions favoring species coexistence and biodiversity.

Main Methods:

Utilized an individual-based Lagrangian model to represent population structure.
Developed partial differential equations approximating competitive dynamics through averaging.
Analyzed the impact of resource pulse magnitude, duration, and frequency on competition.

Main Results:

Species with high phosphorus storage capacity are favored by large, short-lived resource pulses.
Storage specialists can competitively exclude or coexist with species optimized for nutrient uptake and growth.
Competitive dynamics approach neutrality under very infrequent resource pulses.

Conclusions:

Periodic, large-magnitude resource pulses promote the persistence of species with high nutrient storage capacity.
Biodiversity is favored when resource pulses occur at frequencies significantly longer than the average generation time.
Nutrient storage and uptake capabilities are key traits for species success in fluctuating environments.