TY  - JOUR
A1  - Reverey, Florian
A1  - Großart, Hans-Peter
A1  - Premke, Katrin
A1  - Lischeid, Gunnar
T1  - Carbon and nutrient cycling in kettle hole sediments depending on hydrological dynamics: a review
JF  - Hydrobiologia : acta hydrobiologica, hydrographica, limnologica et protistologica
N2  - Kettle holes as a specific group of isolated, small lentic freshwater systems (LFS) often are (i) hot spots of biogeochemical cycling and (ii) exposed to frequent sediment desiccation and rewetting. Their ecological functioning is greatly determined by immanent carbon and nutrient transformations. The objective of this review is to elucidate effects of a changing hydrological regime (i.e., dry-wet cycles) on carbon and nutrient cycling in kettle hole sediments. Generally, dry-wet cycles have the potential to increase C and N losses as well as P availability. However, their duration and frequency are important controlling factors regarding direction and intensity of biogeochemical and microbiological responses. To evaluate drought impacts on sediment carbon and nutrient cycling in detail requires the context of the LFS hydrological history. For example, frequent drought events induce physiological adaptation of exposed microbial communities and thus flatten metabolic responses, whereas rare events provoke unbalanced, strong microbial responses. Different potential of microbial resilience to drought stress can irretrievably change microbial communities and functional guilds, gearing cascades of functional responses. Hence, dry-wet events can shift the biogeochemical cycling of organic matter and nutrients to a new equilibrium, thus affecting the dynamic balance between carbon burial and mineralization in kettle holes.
KW  - Drought
KW  - Rewetting
KW  - Temporary pond
KW  - Kettle hole
KW  - Organic matter
KW  - Nitrogen
KW  - Phosphorus
Y1  - 2016
U6  - https://doi.org/10.1007/s10750-016-2715-9
SN  - 0018-8158
SN  - 1573-5117
VL  - 775
SP  - 1
EP  - 20
PB  - Springer
CY  - Dordrecht
ER  -