Selection of micro-organisms in a spatially explicit environment and implications for plant access to nitrogen

Ann Kinzig, John Harte

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

1 Evolution of a microbial nitrogen-uptake strategy that removes nitrogen at less than the maximum potential rate creates soil environments favourable for increased plant access to nitrogen. Plant productivity is thus increased, and achievement of maximum microbial biomass is facilitated through increased microbial access to plant-derived carbon. 2 Simulations show that micro-organisms exhibiting such a 'strategic' nitrogen uptake will be competitively excluded by more voracious micro-organisms in a homogeneous system, but can persist in a spatially explicit system. This persistence of less voracious micro-organisms contrasts with the frequently held view that micro-organisms in soil systems take up nitrogen at the maximum possible rate. 3 The selection of strategic or voracious microbial types in a spatially explicit environment is sensitive to the frequency of plant and microbial disturbance, and to the rate of diffusion of inorganic nitrogen in the soil system. In particular, the strategic (less voracious) microbial types are favoured under conditions of low plant disturbance, low to moderate diffusion of inorganic nitrogen, and moderate microbial disturbance. 4 When selection favours strategic microbial types, plant access to nitrogen is increased. Plants may also evolve strategies in a spatially explicit environment that will increase population densities of favourable, strategic microbial types.

Original languageEnglish (US)
Pages (from-to)841-853
Number of pages13
JournalJournal of Ecology
Volume86
Issue number5
StatePublished - 1998

Fingerprint

microorganisms
nitrogen
inorganic nitrogen
disturbance
soil
micro-organism
edaphic factors
population density
microbial biomass
persistence
productivity
carbon
biomass
simulation
rate

Keywords

  • Microbial selection
  • Mutualism
  • Nitrogen allocation
  • Nitrogen cycle
  • Plant-microbial interactions
  • Spatially explicit

ASJC Scopus subject areas

  • Ecology

Cite this

Selection of micro-organisms in a spatially explicit environment and implications for plant access to nitrogen. / Kinzig, Ann; Harte, John.

In: Journal of Ecology, Vol. 86, No. 5, 1998, p. 841-853.

Research output: Contribution to journalArticle

@article{ba3587831022478ca5b885057552cf91,
title = "Selection of micro-organisms in a spatially explicit environment and implications for plant access to nitrogen",
abstract = "1 Evolution of a microbial nitrogen-uptake strategy that removes nitrogen at less than the maximum potential rate creates soil environments favourable for increased plant access to nitrogen. Plant productivity is thus increased, and achievement of maximum microbial biomass is facilitated through increased microbial access to plant-derived carbon. 2 Simulations show that micro-organisms exhibiting such a 'strategic' nitrogen uptake will be competitively excluded by more voracious micro-organisms in a homogeneous system, but can persist in a spatially explicit system. This persistence of less voracious micro-organisms contrasts with the frequently held view that micro-organisms in soil systems take up nitrogen at the maximum possible rate. 3 The selection of strategic or voracious microbial types in a spatially explicit environment is sensitive to the frequency of plant and microbial disturbance, and to the rate of diffusion of inorganic nitrogen in the soil system. In particular, the strategic (less voracious) microbial types are favoured under conditions of low plant disturbance, low to moderate diffusion of inorganic nitrogen, and moderate microbial disturbance. 4 When selection favours strategic microbial types, plant access to nitrogen is increased. Plants may also evolve strategies in a spatially explicit environment that will increase population densities of favourable, strategic microbial types.",
keywords = "Microbial selection, Mutualism, Nitrogen allocation, Nitrogen cycle, Plant-microbial interactions, Spatially explicit",
author = "Ann Kinzig and John Harte",
year = "1998",
language = "English (US)",
volume = "86",
pages = "841--853",
journal = "Journal of Ecology",
issn = "0022-0477",
publisher = "Wiley-Blackwell",
number = "5",

}

TY - JOUR

T1 - Selection of micro-organisms in a spatially explicit environment and implications for plant access to nitrogen

AU - Kinzig, Ann

AU - Harte, John

PY - 1998

Y1 - 1998

N2 - 1 Evolution of a microbial nitrogen-uptake strategy that removes nitrogen at less than the maximum potential rate creates soil environments favourable for increased plant access to nitrogen. Plant productivity is thus increased, and achievement of maximum microbial biomass is facilitated through increased microbial access to plant-derived carbon. 2 Simulations show that micro-organisms exhibiting such a 'strategic' nitrogen uptake will be competitively excluded by more voracious micro-organisms in a homogeneous system, but can persist in a spatially explicit system. This persistence of less voracious micro-organisms contrasts with the frequently held view that micro-organisms in soil systems take up nitrogen at the maximum possible rate. 3 The selection of strategic or voracious microbial types in a spatially explicit environment is sensitive to the frequency of plant and microbial disturbance, and to the rate of diffusion of inorganic nitrogen in the soil system. In particular, the strategic (less voracious) microbial types are favoured under conditions of low plant disturbance, low to moderate diffusion of inorganic nitrogen, and moderate microbial disturbance. 4 When selection favours strategic microbial types, plant access to nitrogen is increased. Plants may also evolve strategies in a spatially explicit environment that will increase population densities of favourable, strategic microbial types.

AB - 1 Evolution of a microbial nitrogen-uptake strategy that removes nitrogen at less than the maximum potential rate creates soil environments favourable for increased plant access to nitrogen. Plant productivity is thus increased, and achievement of maximum microbial biomass is facilitated through increased microbial access to plant-derived carbon. 2 Simulations show that micro-organisms exhibiting such a 'strategic' nitrogen uptake will be competitively excluded by more voracious micro-organisms in a homogeneous system, but can persist in a spatially explicit system. This persistence of less voracious micro-organisms contrasts with the frequently held view that micro-organisms in soil systems take up nitrogen at the maximum possible rate. 3 The selection of strategic or voracious microbial types in a spatially explicit environment is sensitive to the frequency of plant and microbial disturbance, and to the rate of diffusion of inorganic nitrogen in the soil system. In particular, the strategic (less voracious) microbial types are favoured under conditions of low plant disturbance, low to moderate diffusion of inorganic nitrogen, and moderate microbial disturbance. 4 When selection favours strategic microbial types, plant access to nitrogen is increased. Plants may also evolve strategies in a spatially explicit environment that will increase population densities of favourable, strategic microbial types.

KW - Microbial selection

KW - Mutualism

KW - Nitrogen allocation

KW - Nitrogen cycle

KW - Plant-microbial interactions

KW - Spatially explicit

UR - http://www.scopus.com/inward/record.url?scp=0031790511&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0031790511&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0031790511

VL - 86

SP - 841

EP - 853

JO - Journal of Ecology

JF - Journal of Ecology

SN - 0022-0477

IS - 5

ER -