The effects of short‐term inundation on carbon dynamics, microbial community structure and microbial activity in floodplain soil

Wilson, Jessica S.; Baldwin, Darren S.; Rees, Gavin N.; Wilson, Benjamin

doi:10.1002/rra.1352

Cited by 72 publications

(67 citation statements)

References 59 publications

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“…In the soil, contrary to the studies of Wilson et al (2011) and others, we found only minor changes in the community structure caused by flooding. In Wilson et al (2011), the duration of the flood was considerably longer, so we suspect that short-term floods as in our study do not allow for successful establishment of taxa, whereas longer flooding periods may support the colonization and establishment of allochthonous taxa.…”

Section: Flooding As a Factor For Organism Exchange And Shifts In Comcontrasting

confidence: 99%

“…In Wilson et al (2011), the duration of the flood was considerably longer, so we suspect that short-term floods as in our study do not allow for successful establishment of taxa, whereas longer flooding periods may support the colonization and establishment of allochthonous taxa. Interestingly, the similarity between control and flooded treatment of soil even increased after the initial flooding.…”

Section: Flooding As a Factor For Organism Exchange And Shifts In Commentioning

confidence: 70%

“…The effect of short-term inundation is less well studied -particularly for streams but also for the interconnected soils (but see Mentzer et al 2006, Muylaert & Vyverman 2006, Antheunisse & Verhoeven 2008, Unger et al 2009a, Wilson et al 2011. Mentzer et al (2006), Unger et al (2009a) and Wilson et al (2011) studied the effects of short-term inundations on soil microbial communities with regard to the community composition, microbial biomass and activity by terminal restriction fragment length polymorphism analysis (T-RFLP), phospholipid fatty acid analysis (PLFA) and activity analysis of several enzymes. All studies identified a change in community structure in soil caused by flooding, e.g.…”

Section: Introductionmentioning

confidence: 99%

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Effects of short-term flooding on aquatic and terrestrial microeukaryotic communities: a mesocosm approach

Graupner¹,

Röhl²,

Jensen³

et al. 2017

Aquat. Microb. Ecol.

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Freshwater and soil are not strictly isolated habitats. In particular, floods may facilitate the exchange of organisms and nutrients. Flooding can have both a stimulating and a harmful effect on the organisms of the respective habitats. The effects of short-term flooding on microeukaryotic communities in the aquatic and terrestrial habitat have so far been scarcely studied. Here, we investigated the effect of a 24 h artificial inundation on the microeukaryotic community composition in AquaFlow mesocosm systems. We investigated the shift of community composition based on molecular amplicon diversity both on soil and water during flooding and for a period of 12 d after flooding. Community composition was, as expected, strongly different between soil and water. Flooding had a significant effect on the freshwater community, whereas the soil community was hardly affected. In particular, we observed a transfer of nutrients from the terrestrial habitat into the aquatic habitat and identified ~50 taxa that were transferred by the flooding event. This effect of flooding was, however, overlaid by shifts of the communities with time, presumably reflecting an acclimatization to the conditions in the AquaFlow systems.

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Section: Flooding As a Factor For Organism Exchange And Shifts In Comcontrasting

confidence: 99%

Section: Flooding As a Factor For Organism Exchange And Shifts In Commentioning

confidence: 70%

Section: Introductionmentioning

confidence: 99%

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Effects of short-term flooding on aquatic and terrestrial microeukaryotic communities: a mesocosm approach

Graupner¹,

Röhl²,

Jensen³

et al. 2017

Aquat. Microb. Ecol.

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“…This suggests that restoration has led to a significant increase in soil functional diversity. These results are in line with previous reports that short-term inundations are important drivers of microbial habitat structure and function in floodplains (Wilson et al, 2011). In a comprehensive study of nitrogen cycling in floodplain soils, we identified two FPZs in the restored section as hot zones of nitrogen turnover and removal : (i) the low-lying alluvial forest with a finetextured soil where anaerobic microsites facilitated coupled nitrification-denitrification; (ii) the gravel bars, characterized by frequent inundation and high sediment deposition rates.…”

Section: How Does Morphological Variability Affect Biogeochemical Trasupporting

confidence: 93%

Morphological, hydrological, biogeochemical and ecological changes and challenges in river restoration – the Thur River case study

Schirmer

Luster

Linde

et al. 2014

Hydrol. Earth Syst. Sci.

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Abstract. River restoration can enhance river dynamics, environmental heterogeneity and biodiversity, but the underlying processes governing the dynamic changes need to be understood to ensure that restoration projects meet their goals, and adverse effects are prevented. In particular, we need to comprehend how hydromorphological variability quantitatively relates to ecosystem functioning and services, biodiversity as well as ground-and surface water quality in restored river corridors. This involves (i) physical processes and structural properties, determining erosion and sedimentation, as well as solute and heat transport behavior in surface water and within the subsurface; (ii) biogeochemical processes and characteristics, including the turnover of nutrients and natural water constituents; and (iii) ecological processes and indicators related to biodiversity and ecological functioning. All these aspects are interlinked, requiring an interdisciplinary investigation approach. Here, we present an overview of the recently completed RECORD (REstored CORridor Dynamics) project in which we combined physical, chemical, and biological observations with modeling at a restored river corridor of the perialpine Thur River in Switzerland. Our results show that river restoration, beyond inducing morphologic changes that reshape the river bed and banks, triggered complex spatial patterns of bank infiltration, and affected habitat type, biotic communities and biogeochemical processes. We adopted an interdisciplinary approach of monitoring the continuing changes due to restoration measures to address the following questions: How stable is the morphological variability established by restoration? Does morphological variability guarantee an improvement in biodiversity? How does morphological variability affect biogeochemical transformations in the river corridor? What are some potential adverse effects of river restoration? How is river restoration influenced by catchment-scale hydraulics and which feedbacks exist on the large scale? Beyond summarizing the major results of individual studies within the project, we show that these overarching questions could only be addressed in an interdisciplinary framework.

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“…Ecosystem services such as provision of plant and animal resources, removal and/or degradation of pollutants, nutrient retention, and carbon (C) storage are tightly linked to organic C dynamics in riparian soils (Hill and Cardaci, 2004;Wilson et al, 2011). Although the need for a fundamental understanding of the factors that drive the processes involved in C cycling in heterogeneous and dynamic systems such as floodplains is recognized, knowledge is still fragmentary (Pacific et al, 2008;Zehetner et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Heterogeneity of soil carbon pools and fluxes in a channelized and a restored floodplain section (Thur River, Switzerland)

Samaritani

Shrestha

Fournier

et al. 2011

Hydrol. Earth Syst. Sci.

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Abstract. Due to their spatial complexity and dynamic nature, floodplains provide a wide range of ecosystem functions. However, because of flow regulation, many riverine floodplains have lost their characteristic heterogeneity. Restoration of floodplain habitats and the rehabilitation of key ecosystem functions, many of them linked to organic carbon (C) dynamics in riparian soils, has therefore become a major goal of environmental policy. The fundamental understanding of the factors that drive the processes involved in C cycling in heterogeneous and dynamic systems such as floodplains is however only fragmentary.We quantified soil organic C pools (microbial C and water extractable organic C) and fluxes (soil respiration and net methane production) in functional process zones of adjacent channelized and widened sections of the Thur River, NE Switzerland, on a seasonal basis. The objective was to assess how spatial heterogeneity and temporal variability of these pools and fluxes relate to physicochemical soil properties on one hand, and to soil environmental conditions and flood disturbance on the other hand.Correspondence to: J. Luster (joerg.luster@wsl.ch) Overall, factors related to seasonality and flooding (temperature, water content, organic matter input) affected soil C dynamics more than soil properties did. Coarse-textured soils on gravel bars in the restored section were characterized by low base-levels of organic C pools due to low TOC contents. However, frequent disturbance by flood pulses led to high heterogeneity with temporarily and locally increased C pools and soil respiration. By contrast, in stable riparian forests, the finer texture of the soils and corresponding higher TOC contents and water retention capacity led to high baselevels of C pools. Spatial heterogeneity was low, but major floods and seasonal differences in temperature had additional impacts on both pools and fluxes. Soil properties and base levels of C pools in the dam foreland of the channelized section were similar to the gravel bars of the restored section. By contrast, spatial heterogeneity, seasonal effects and flood disturbance were similar to the forests, except for indications of high CH 4 production that are explained by long travel times of infiltrating water favoring reducing conditions. Overall, the restored section exhibited both a larger range and a higher heterogeneity of organic C pools and fluxes as well as a higher plant biodiversity than the channelized section. This suggests that restoration has indeed led to an increase in functional diversity.

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The effects of short‐term inundation on carbon dynamics, microbial community structure and microbial activity in floodplain soil

Cited by 72 publications

References 59 publications

Effects of short-term flooding on aquatic and terrestrial microeukaryotic communities: a mesocosm approach

Effects of short-term flooding on aquatic and terrestrial microeukaryotic communities: a mesocosm approach

Morphological, hydrological, biogeochemical and ecological changes and challenges in river restoration – the Thur River case study

Heterogeneity of soil carbon pools and fluxes in a channelized and a restored floodplain section (Thur River, Switzerland)

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