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  A quantitative index of land-use intensity in grasslands: Integrating mowing, grazing and fertilization

Blüthgen, N., Dormann, C. F., Prati, D., Klaus, V. H., Kleinebecker, T., Hölzel, N., et al. (2012). A quantitative index of land-use intensity in grasslands: Integrating mowing, grazing and fertilization. Basic and Applied Ecology, 13(3), 207-220. doi:10.1016/j.baae.2012.04.001.

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Blüthgen, N., Autor
Dormann, C. F., Autor
Prati, D., Autor
Klaus, V. H., Autor
Kleinebecker, T., Autor
Hölzel, N., Autor
Alt, F., Autor
Boch, S., Autor
Gockel, S., Autor
Hemp, A., Autor
Müller, J., Autor
Nieschulze, J.1, Autor           
Renner, S. C., Autor
Schöning, I.2, Autor           
Schumacher, U., Autor
Socher, S. A., Autor
Wells, K., Autor
Birkhofer, K., Autor
Buscot, F., Autor
Oelmann, Y., Autor
Rothenwöhrer, C., AutorScherber, C., AutorTscharntke, T., AutorWeiner, C. N., AutorFischer, M., AutorKalko, E. V., AutorLinsenmair, K. E., AutorSchulze, E. D.1, Autor           Weisser, W. W., Autor mehr..
Affiliations:
1Emeritus Group, Prof. E.-D. Schulze, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497756              
2Soil and Ecosystem Processes, Dr. M. Schrumpf, Department Biogeochemical Processes, Prof. S. E. Trumbore, Max Planck Institute for Biogeochemistry, Max Planck Society, ou_1497776              

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Schlagwörter: Agro-ecosystems Biodiversity exploratories Grassland management Land-use impacts Livestock density Meadows Nitrogen Pastures
 Zusammenfassung: Land use is increasingly recognized as a major driver of biodiversity and ecosystem functioning in many current research projects. In grasslands, land use is often classified by categorical descriptors such as pastures versus meadows or fertilized versus unfertilized sites. However, to account for the quantitative variation of multiple land-use types in heterogeneous landscapes, a quantitative, continuous index of land-use intensity (LUI) is desirable. Here we define such a compound, additive LUI index for managed grasslands including meadows and pastures. The LUI index summarizes the standardized intensity of three components of land use, namely fertilization, mowing, and livestock grazing at each site. We examined the performance of the LUI index to predict selected response variables on up to 150 grassland sites in the Biodiversity Exploratories in three regions in Germany (Alb, Hainich, Schorfheide). We tested the average Ellenberg nitrogen indicator values of the plant community, nitrogen and phosphorus concentration in the aboveground plant biomass, plant-available phosphorus concentration in the top soil, and soil C/N ratio, and the first principle component of these five response variables. The LUI index significantly predicted the principal component of all five response variables, as well as some of the individual responses. Moreover, vascular plant diversity decreased significantly with LUI in two regions (Alb and Hainich). Inter-annual changes in management practice were pronounced from 2006 to 2008, particularly due to variation in grazing intensity. This rendered the selection of the appropriate reference year(s) an important decision for analyses of land-use effects, whereas details in the standardization of the index were of minor importance. We also tested several alternative calculations of a LUI index, but all are strongly linearly correlated to the proposed index. The proposed LUI index reduces the complexity of agricultural practices to a single dimension and may serve as a baseline to test how different groups of organisms and processes respond to land use. In combination with more detailed analyses, this index may help to unravel whether and how land-use intensities, associated disturbance levels or other local or regional influences drive ecological processes.

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 Datum: 2012-04-122012
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1016/j.baae.2012.04.001
Anderer: BGC1662
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Titel: Basic and Applied Ecology
Genre der Quelle: Zeitschrift
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Jena, Germany : Urban & Fischer
Seiten: - Band / Heft: 13 (3) Artikelnummer: - Start- / Endseite: 207 - 220 Identifikator: CoNE: https://pure.mpg.de/cone/journals/resource/110975506072219
ISSN: 1439-1791