Determining Temperature-Normalized Decomposition Rates

Gessner, Mark O.; Peeters, Frank

Determining Temperature-Normalized Decomposition Rates

Dateien

Gessner_2-267x04pr4ukx2.pdfGröße: 1.27 MBDownloads: 48

Datum

2020

Autor:innen

Gessner, Mark O.

Peeters, Frank

Publikationstyp

Beitrag zu einem Sammelband

Publikationsstatus

Published

Erschienen in

BÄRLOCHER, Felix, ed., Mark O. GESSNER, ed., Manuel A.S. GRAÇA, ed.. Methods to Study Litter Decomposition : A Practical Guide. Cham: Springer International Publishing, 2020, pp. 553-560. ISBN 978-3-030-30514-7. Available under: doi: 10.1007/978-3-030-30515-4_60

Zusammenfassung

Temperature is a key environmental factor controlling rates of litter decomposition in streams and other ecosystems. Normalizing decomposition rates for temperature not only enables assessments of the importance of temperature effects but also facilitates comparisons of potential other controlling factors. This chapter describes procedures to achieve such normalization. In streams, temperature normalization of decomposition rates has almost invariably assumed a linear relationship. Accordingly, litter mass remaining at various time points after deployment of litter in the field is regressed against thermal sums (degree days) obtained from continuous temperature records. The same approach is taken when an exponential temperature dependency is assumed, commonly by using a Q10 model, with Q10 being assumed to take a given value, such as 2, or being fitted along with the decomposition rate coefficient. Here the thermal sums of the degree-day model are replaced by an integral that captures the exponential relationship. Worked examples of the calculations are provided in a supplementary spreadsheet and as computer code. Similar approaches to temperature normalization can be adopted based on dependencies encapsulated in the Arrhenius law used in the metabolic theory of ecology.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

Litter mass loss, Decay rate, Temperature correction, Temperature sensitivity, Degree-day model, Q10, Arrhenius model, Metabolic theory of ecology, Negative exponential decay model, Regression analysis

Zitieren

ISO 690

GESSNER, Mark O., Frank PEETERS, 2020. Determining Temperature-Normalized Decomposition Rates. In: BÄRLOCHER, Felix, ed., Mark O. GESSNER, ed., Manuel A.S. GRAÇA, ed.. Methods to Study Litter Decomposition : A Practical Guide. Cham: Springer International Publishing, 2020, pp. 553-560. ISBN 978-3-030-30514-7. Available under: doi: 10.1007/978-3-030-30515-4_60

BibTex

@incollection{Gessner2020-07-31Deter-50472,
  year={2020},
  doi={10.1007/978-3-030-30515-4_60},
  title={Determining Temperature-Normalized Decomposition Rates},
  isbn={978-3-030-30514-7},
  publisher={Springer International Publishing},
  address={Cham},
  booktitle={Methods to Study Litter Decomposition : A Practical Guide},
  pages={553--560},
  editor={Bärlocher, Felix and Gessner, Mark O. and Graça, Manuel A.S.},
  author={Gessner, Mark O. and Peeters, Frank}
}

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