geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Ecosystem response of pasture soil communities to fumigation-induced microbial diversity reductions: An examination of the biodiversity-ecosystem function relationship


, : Ecosystem response of pasture soil communities to fumigation-induced microbial diversity reductions: An examination of the biodiversity-ecosystem function relationship. Oikos 90(2): 279-294, August

A technique based on progressive fumigation was used to reduce soil microbial biodiversity, and the effects of such reductions upon the stability of key soil processes were measured. Mineral soil samples from a grassland were fumigated with chloro-form for up to 24 h and then incubated for 5 months to allow recolonisation by surviving organisms. The diversity of cultivable and non-cultivable bacteria, protozoa and nematodes was progressively reduced by increasing fumigation times, as was the number of trophic groups, phyla within trophic groups, and taxa within phyla. Total microbial biomass was similar within fumigated soils, but lower than for unfumigated soil. There was no direct relationship between biodiversity and function. Some broad-scale functional parameters increased as biodiversity decreased, e.g. thymidine incorporation, growth on added nutrients, and the decomposition rate of plant residues. Other more specific parameters decreased as biodiversity decreased, e.g. nitrification, denitrification and methane oxidation. Thus specific functional parameters may be a more sensitive indicator of environmental change than general parameters. Although fumigation reduced soil microbial biodiversity, there was evidence to suggest that it selected for organisms with particular physiological characteristics. The consequences of this for interpreting biodiversity - function relationships are discussed. The stability of the resulting communities to perturbation was further examined by imposing a transient (brief heating to 40degreeC) or a persistent (addition of CuSO4) stress. Decomposition of grass residues was determined on three occasions after such perturbations. The soils clearly demonstrated resilience to the transient stress; decomposition rates were initially depressed by the stress and recovered over time. Resilience was reduced in the soils with decreasing biodiversity. Soils were not resilient to the persistent stress, there was no recovery in decomposition rate over time, but the soils with the highest biodiversity were more resistant to the stress than soils with impaired biodiversity. The study of functional stability under applied perturbation is a powerful means of examining the effects of biodiversity.

US$19.90

DOI: 10.1034/j.1600-0706.2000.900208.x


Other references

Steijling-Llndeboom, G.J.; Steijling, W.J.; In't Zandt, P.H.A., 1948: The condition of teeth during and after the war. During and since the war an intensive study was made, under the control of a Committee of the National Nutrition Council, of the teeth of about 1800 schoolchildren and 4400 institution children. Data were collected at the same time on diet, illnes...

Palmer, R., H.; Schonwasser, D., C.; Rahman, D.; Pappin, D., J.C.; Herget, T.; Parker, P., J., 1996: PRK1 phosphorylates MARCKS at the PKC sites: Serine 152, serine 156 and serine 163. The 80kDa Myristolated Alanine-Rich C-Kinase Substrate (MARCKS) is a major in vivo substrate of protein kinase C (PKC). Here we report that MARCKS is a major substrate for the lipid-activated PKC-related kinase (PRK1) in cell extracts. Furthermore...

Shrayer, D.P.; Bogaars, H.; Cole, B.; Wolf, S.F.; Wanebo, H.J., 1998: Capacity of murine Il-12 to inhibit the development of implanted primary melanoma tumors and to prevent lung metastases in melanoma challenged mice. Proceedings of the American Association for Cancer Research Annual Meeting 39: 533, March

Wu, L-Ao.; Bharioke, A.; Brumer, P., 2008: Quantum conditions on dynamics and control in open systems. Quantum conditions on the control of dynamics of a system coupled to an environment are obtained. Specifically, consider a system initially in a system subspace H(0) of dimensionality M(0), which evolves to populate system subspaces H(1), H(2) of...

Niu, L.; Jin, X.; Jin, L.; Zhang, Y.; Liu, B.; Li, C., 2016: Feasibility of focal cerebral ischemia and reperfusion surgery combined with chronic unpredictable mild stress to simulate the post-stroke depressive state in rats. To evaluate the feasibility of focal cerebral ischemia and reperfusion (FCIR) surgery combined chronic unpredictable mild stress (CUMS) to simulate the post-stroke depression (PSD) state in rats. Sprague-Dawley male rats were divided randomly into...

Franzen, O.; Hraska, V.; Begemann, P.; Geffert, G.; Baldus, S., 2005: Congenitally corrected transposition of the great arteries. Zeitschrift für Kardiologie 94(8): 486-487

Lowman, W.; Venter, L.; Scribante, J., 2013: Bacterial contamination of re-usable laryngoscope blades during the course of daily anaesthetic practice. Hospital-acquired infections (HAIs) are largely preventable through risk analysis and modification of practice. Anaesthetic practice plays a limited role in the prevention of HAIs, although laryngoscope use and decontamination is an area of concer...

Lee, K.Y.ol; Chang, S.W.on; Shin, C.S.k; Chang, H.B.ng; Min, K.B.m; Jeong, I.M.eong, 1995: Effect of pH and temperature on mycelial growth, sclerotial formation and conidial germination of Botrytis squamosa from Chinese chive. Botrytis squamosa was isolated from a leaf blight of the Chinese chive (Allium tuberosum). The optimum temperature for mycelial growth, Conidial production and sclerotial formation of the pathogen on PDA media was 20 degree C. The temperature rang...

Aida, H.; Yamaguchi, S.; Iwanami, H.; Nakajima, M.; Sakamoto, S.; Yoshimatsu, M.; Anzai, Y.; Watanabe, K.; Ohya, N., 1981: A case of unilateral hyperlucent lung associated with aortic valve disease. A 31-yr-old female with a previous history of several respiratory infections during infancy was studied. Over the left lung area, respiratory sound was inaudible. Only moist rales were heard. Heart murmurs were typical of aortic valve stenosis and...

Zarudsky, JD.; Miller, R., 1983: Nesting boat-tailed grackles on Pearsall's Hassock. Kingbird, 331: 2-4