Suppression of soil decomposers and promotion of long-lived, root herbivorous nematodes by climate change

Stevnbak, Karen; Maraldo, Kristine; Georgieva, Slavka; Bjørnlund, Lisa; Beier, Claus; Schmidt, Inger Kappel; Christensen, Søren

doi:10.1016/j.ejsobi.2012.04.001

Cited by 43 publications

(18 citation statements)

References 52 publications

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“…Soils are diverse systems consist of highly diverse microhabitats which form complex arrangement of plant in soil microbial communities [54][55][56][57][58][59][60][61][62][63][64]. Soil contains a complex community of microorganisms include numerous groups of bacteria, fungi, viruses, and nematodes with a range of abiotic constituents.…”

Section: Biological Propertiesmentioning

confidence: 99%

The role of soil properties and it’s interaction towards quality plant fiber: A review

Khalil

Hossain

Rosamah

et al. 2015

Renewable and Sustainable Energy Reviews

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Section: Biological Propertiesmentioning

confidence: 99%

The role of soil properties and it’s interaction towards quality plant fiber: A review

Khalil

Hossain

Rosamah

et al. 2015

Renewable and Sustainable Energy Reviews

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“…The chance of observing effects of altered water availability on nematodes does not seem to increase strongly with time as a lack of responses as well as significant changes in nematode abundance have been found both in studies of a month or less (Whitford et al 1981, Steinberger et al 1984, Schnü rer et al 1986, Bouwman and Zwart 1994 and of at least two years (Darby et al 2011, Stevnbak et al 2012. Again, none of the ecosystems in which consistent responses were found were deserts, while all studies that found no response in any of the trophic groups were conducted in deserts.…”

Section: Evolution Of Nematode Responses To Water Availability Througmentioning

confidence: 99%

“…In other ecosystems nematode densities decreased with drought (Landesman et al 2011, Stevnbak et al 2012 or increased with water addition (Smolik andDodd 1983, Landesman et al 2011). Two earlier studies in deserts, however, found that water additions affected the abundance of none of the nematode trophic groups (Darby et al 2011) or only that of plant parasites .…”

Section: Nematode Responses To Long-term Alterations In Water Availabmentioning

confidence: 99%

“…Furthermore, they only need to leave roots and move within water films around soil particles to disperse. They are therefore expected to be least sensitive to short-term changes in water availability (Stevnbak et al 2012). Plants in a desert ecosystem quickly extract any moisture that enters the soil, creating a moisture gradient in the root zone.…”

Section: Introductionmentioning

confidence: 99%

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Responses of a desert nematode community to changes in water availability

et al. 2015

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Abstract. The most recent climate models unequivocally predict a strong drying trend for the southwestern USA within the next century. Soil nematodes are a highly important component of desert ecosystem functioning, but rely on water films for movement. However, it is currently poorly understood how different trophic groups of nematodes respond to chronic presses as well as short-lived pulses of altered water availability, especially in arid systems where such changes are expected to have the greatest impact. The aim of this study was to assess the effects of both instantaneous and long-term variation in water availability on desert soil nematode trophic groups. We hypothesized that nematode abundance would respond positively to both short-and long-term increases in moisture. Based on the ecology of the different trophic groups we further made predictions about their relative rates of response. We increased or decreased precipitation from ambient levels in the Chihuahuan Desert for four consecutive years and sampled soil nematodes after two, three and four years. We tested the effects of altered precipitation treatments through time as well as gravimetric soil moisture at the time of sampling on the abundance of the different nematode trophic groups. In contrast to our hypotheses, the abundances of most nematode trophic groups were unaffected by the amount of precipitation, even after four years of altered precipitation. Plant-parasitic nematodes from low moisture soils were the only group that reacted positively to increased precipitation from the third year onwards. Trophic groups responded differently to soil moisture, with bacterivores decreasing with increasing moisture and omnivores showing a positive relationship that diminished over time. We show that in general, these desert nematodes were not limited by precipitation, and were highly resilient to decreases therein. However, when also considering the effects of soil moisture, some more complex patterns and differences among trophic groups emerged. We discuss potential mechanisms explaining these observations and contrast our findings with those from other ecosystems around the world. We conclude that deserts harbor nematode communities that seem more resilient to altered water availability than other ecosystems.

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“…There is a large body of the literature on a soil fauna community (Milcu et al 2013;Liiri et al 2012;Zhu et al 2012;Liu et al 2007;Sørensen et al 2006;Xu et al 2006); these reports have been widely observed that increased microarthropod abundance will lead to rapid decomposition at tropical and temperate sites (Stevnbak et al 2012;Yin et al 2010;Ruan et al 2005;González et al 2001;Reddy 1995). However, the importance of soil fauna communities as driving soil respiration has always been ignored.…”

Section: Introductionmentioning

confidence: 95%

Contribution of soil fauna respiration to CO2 flux in subtropical Moso bamboo (Phyllostachys pubescens) forests: a comparison of different soil treatment methods

et al. 2016

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Soil fauna is an essential community in forest ecosystems; yet, the role of these organisms in soil total CO 2 emission is still unclear, partly because of the lack of effective measurement methods, especially in field situ conditions. This study investigated the soil fauna community in Moso bamboo (Phyllostachys pubescens) stands in subtropical China, the faunal contribution to soil total respiration, and the effects of different methods for repelling soil fauna. Three methods to repel soil fauna were tested, including naphthalene application (NT sites), electric steel bars (SET sites), and the combination of naphthalene and electric steel bars (NET sites). Control sites (NTC sites) had no treatment. The results showed that naphthalene, electric steel bars, and a combination of naphthalene and electric steel bars all are powerful in excluding soil fauna individual numbers (INs) (F = 48.65, P \ 0.05), but none of them could change the numbers and the composition of soil fauna groups significantly (S = 0.889-1.00 and W = 0.833-0.960). The mean soil fauna respiration was measured at approximately 0.178 lmol m 2 s -1 ; the mean faunal contribution to soil total respiration was 4.02 % at SET sites, 4.11 % at NT sites, and 5.51 % at NET sites; and the mean-reduced fauna numbers were 71.46, 79.13 and 84.84 %, with the mean soil CO 2 flux losses (MRL) increased. Mean soil respiration losses (MRLs) were significantly related to H 0 (R 2 = 0.838, P \ 0.004) and IN (R 2 = 0.810, P \ 0.004) in SET, NT, and NET. The results suggested that the method of the combined naphthalene and the electric steel bars were shown to be reliable for the exclusion of soil fauna and the estimation of soil fauna respiration in field measurement.

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Suppression of soil decomposers and promotion of long-lived, root herbivorous nematodes by climate change

Cited by 43 publications

References 52 publications

The role of soil properties and it’s interaction towards quality plant fiber: A review

The role of soil properties and it’s interaction towards quality plant fiber: A review

Responses of a desert nematode community to changes in water availability

Contribution of soil fauna respiration to CO2 flux in subtropical Moso bamboo (Phyllostachys pubescens) forests: a comparison of different soil treatment methods

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