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Soil fauna and global change

responses to experimental drought, irrigation, fertilisation and soil warming

Lindberg, Niklas (2003). Soil fauna and global change. Diss. (sammanfattning/summary) Uppsala : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae. Silvestria, 1401-6230 ; 270
ISBN 91-576-6504-4
[Doctoral thesis]

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Abstract

To examine possible effects of global change on soil fauna abundance and diversity, two long-term field experiments in Norway spruce stands in Sweden were studied. Soil fauna (Oribatida, Mesostigmata, Collembola, predatory macroarthropods and Enchytraeidae) were sampled in plots experimentally simulating altered precipitation patterns and increased soil temperature. Six years of summer drought caused large decreases in abundance in all faunal groups and a reduction in species diversity of Oribatida and Collembola. Summer drought and irrigation caused shifts in the community composition of Oribatida and Collembola, but drought affected soil fauna more than irrigation. Increased soil temperature during 5 years resulted in positive responses in several Oribatida species and negative in some Collembola species. Three years after the summer drought treatment had ceased, the soil arthropod communities had still not returned to control conditions. Total abundances recovered quickly, but species richness, diversity indices and community composition recovered slower. Mobile arthropod groups seemed to recover faster than groups with more limited dispersal ability, and Oribatida had the slowest recovery rate. Microarthropod species with wide habitat niche width recovered faster than those with narrow niche width, and parthenogenetic Oribatida recovered faster than sexually reproducing ones. Overall, Collembola were less affected by drought, and recovered faster than Oribatida. Soil fauna decreased in plots receiving repeated additions of solid nitrogen fertiliser for 13 years, whereas slight increases were found in plots receiving liquid fertiliser. The fertilisation treatments caused shifts in the community composition of Oribatida and Collembola but did not cause changes in species richness. In conclusion, climate change resulting in frequent summer droughts will probably decrease abundance and diversity of forest soil fauna. Moister conditions may primarily result in shifts in community structure. Intensive forest fertilisation for biofuel production will probably affect the composition of soil fauna communities. Oribatida communities seem to be particularly vulnerable to disturbances. Post-disturbance recovery of soil fauna seems to be slow and disturbances on a large spatial scale may affect the resilience of soil ecosystems, as disturbances may cause permanent changes in community composition.

Authors/Creators:Lindberg, Niklas
Title:Soil fauna and global change
Subtitle:responses to experimental drought, irrigation, fertilisation and soil warming
Year of publishing :March 2003
Volume:270
Number of Pages:37
Papers/manuscripts:
NumberReferences
ALLI. Lindberg, N., Bengtsson, J. & Persson, T. 2002. Effects of experimental irrigation and drought on the composition and diversity of soil fauna in a coniferous stand. Journal of Applied Ecology 39, 924-936. II. Lindberg, N. & Persson, T. Effects of nutrient fertilisation, irrigation and soil warming on the microarthropod community in a boreal Norway spruce stand (Manuscript). III. Lindberg, N. & Bengtsson, J. Recovery of forest soil fauna diversity and composition after repeated summer droughts (Manuscript). IV. Lindberg, N. & Bengtsson, J. Population responses of oribatid mites and collembolans after a drought disturbance (Manuscript).
Place of Publication:Uppsala
ISBN for printed version:91-576-6504-4
ISSN:1401-6230
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agris subject categories.:P Natural resources > P01 Nature conservation and land resources
P Natural resources > P34 Soil biology
Subjects:Not in use, please see Agris categories
Agrovoc terms:collembola, drought, enchytraeidae, irrigation, mesostigmata, cryptostigmata, picea abies, soil fauna, biodiversity, forest soils
Keywords:Collembola, disturbance, drought, Enchytraeidae, global change, irrigation, Mesostigmata, nutrient fertilisation, Oribatida, Picea abies, resilience, soil fauna diversity
URN:NBN:urn:nbn:se:slu:epsilon-26
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-26
ID Code:201
Department:(NL, NJ) > Institutionen för ekologi och miljövård
Deposited By: Niklas Lindberg
Deposited On:24 Mar 2003 00:00
Metadata Last Modified:02 Dec 2014 10:02

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