New indices for quantifying the resistance and resilience of soil biota to exogenous disturbances

The stability (resistance and resilience to disturbance) of a soil system is a key factor influencing ecosystem properties and processes. To compare the stability of different systems, it is necessary to have indices that provide a relative quantitative measure of both the resistance and resilience of a response variable in all possible scenarios. However, the indices currently in use are frequently unable to do this, or are difficult to interpret. Here, we present new indices that avoid these problems. We compare our indices with previously published indices of stability, and also test their performance by using a real data set. We show that our indices accurately represent the response of soil properties (e.g. soil microbial biomass) to a disturbance, and that they are capable of determining differences in stability between contrasting soils.

[1]  David A. Wardle,et al.  Stability of ecosystem properties in response to above‐ground functional group richness and composition , 2000 .

[2]  M. Firestone,et al.  Microbial biomass response to a rapid increase in water potential when dry soil is wetted , 1987 .

[3]  R. O'Neill.  Ecosystem Persistence and Heterotrophic Regulation , 1976 .

[4]  Lawrence H Kaufman,et al.  Stream aufwuchs accumulation: Disturbance frequency and stress resistance and resilience , 2004, Oecologia.

[5]  T. Speir,et al.  Comparison of microbial C, N-flush and ATP, and certain enzyme activities of different textured soils subject to gradual drying , 1988 .

[6]  W. Sousa.  The responses of a community to disturbance: The importance of successional age and species' life histories , 1980, Oecologia.

[7]  B. Griffiths,et al.  Functional stability, substrate utilisation and biological indicators of soils following environmental impacts , 2001 .

[8]  J. P. Grime,et al.  Testing predictions of the resistance and resilience of vegetation subjected to extreme events , 1995 .

[9]  P. Vitousek,et al.  HURRICANE DAMAGE TO A HAWAIIAN FOREST: NUTRIENT SUPPLY RATE AFFECTS RESISTANCE AND RESILIENCE , 1999 .

[10]  S. Sørensen,et al.  Ecosystem response of pasture soil communities to fumigation-induced microbial diversity reductions: an examination of the biodiversity-ecosystem function relationship , 2000 .

[11]  P. Bottner.  Response of microbial biomass to alternate moist and dry conditions in a soil incubated with 14C- and 15N-labelled plant material , 1985 .

[12]  N. Fierer,et al.  Effects of drying–rewetting frequency on soil carbon and nitrogen transformations , 2002 .

[13]  B. Biggs,et al.  Resource stress alters hydrological disturbance effects in a stream periphyton community , 1999 .

[14]  K. Domsch,et al.  A physiological method for the quantitative measurement of microbial biomass in soils , 1978 .

[15]  D. Wardle,et al.  Interactions between microclimatic variables and the soil microbial biomass , 1990, Biology and Fertility of Soils.

[16]  H. Birch.  Further observations on humus decomposition and nitrification , 1959, Plant and Soil.

[17]  D. Tilman.  Biodiversity: Population Versus Ecosystem Stability , 1995 .

[18]  S. Pimm.  The complexity and stability of ecosystems , 1984, Nature.