Soil and litter organisms in Pacific northwest forests under different management practices

Donegan, Katherine; Watrud, Lidia S.; Seidler, Ramon J.; Maggard, Sharon; Shiroyama, Tamotsu; Porteous, Lorna; DiGiovanni, George

doi:10.1016/s0929-1393(01)00155-x

Cited by 36 publications

(15 citation statements)

References 44 publications

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“…Therefore, in our analyses, uncommon taxa, e.g., tomocerid collembolans and pseudoscorpions, were dropped from consideration and analysis because our goal was not to perform a complete census but to work within the limiting criteria established for large-scale monitoring programs. Many studies suggest that soil mites are useful ecological indicators of various kinds of disturbance in agroecosystems (Koehler 1999;Ruf 1998), forests (Donegan et al 2001;Vu and Nguyen 2000), and wetlands (Baur et al 1996). In our study, mites comprised the most abundant and frequently detected EC electrical conductivity, SOM soil organic matter, Temp cumulative temperature 7 days prior to sampling, moist cumulative rainfall 7 days prior to sampling.…”

Section: Abundancesupporting

confidence: 50%

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Response of soil invertebrates to disturbance across three resource regions in North Carolina

Barbercheck

Neher

Anas

et al. 2008

Environ Monit Assess

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We evaluated the potential of soil microarthropods and enchytraeid worms to be useful as bioindicators of soil condition in forest, wetland, and agricultural ecosystems over a range of ecoregions. Selected mesofauna and soil characteristics in soil and litter in relatively undisturbed and disturbed examples of each of three ecosystems within each of three land resource regions were monitored over two years. Optimal times of year to sample these organisms as indicators of disturbance were April, May, July and September. No single measure reflected disturbance across all three ecosystems. Among forest sites, Simpson's diversity index, evenness, abundance of ants, and proportion of enchytraeids in the mesofauna differed between soils of different disturbance levels. Among agricultural sites, richness, evenness, abundance of mites, and proportions of collembolans and of enchytraeids in the mesofauna differed between disturbance levels. Among wetland sites, Shannon's and Simpson's diversity indices, richness based on the total mesofauna, and abundances of mites, diplurans, ants, and isotomid and onychiurid collembolans differed between disturbance levels. Covariates most frequently associated with abundance and diversity of the measured mesofauna were soil electrical conductivity, available N, organic matter, and pH. Canonical correspondence analysis provided information somewhat different to bivariate analysis. Using both approaches to examine soil and litter taxa that have distinctive responses to disturbance may help to identify candidate groups applicable for use in large-scale environmental monitoring programs.

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Section: Abundancesupporting

confidence: 50%

“…In general, undisturbed soils harbor a greater species richness of mite fauna than agricultural soils (Lagerlöf and Andrén 1988). Numbers of mites in litter and soil in mature forests of Pacific Northwest were greater than in clearcut plots (Donegan et al 2001).…”

Section: Abundancementioning

confidence: 78%

Response of soil invertebrates to disturbance across three resource regions in North Carolina

Barbercheck

Neher

Anas

et al. 2008

Environ Monit Assess

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“…Changes in which land management and vegetation cover are related can be reflected by soil free-living nematode populations, which are known to be good environmental indicators, due to the fact that they possess attributes that can reflect below-ground modifications (Bernard 1992;Neher and Campbell 1994;Wasilewska 1997;Bongers and Ferris 1999;Yeates 1999;Donegan et al 2001;Neher et al 2005). In this study, the response of the soil free-living nematode community was used in order to reveal the differences between the common long-term forms of management, i.e., greenhouses, conventional farmlands, and fallows.…”

Section: Discussionmentioning

confidence: 99%

Effects of different soil management practices on soil free-living nematode community structure, Eastern China

Dong¹,

Chen²,

Steinberger³

et al. 2008

Can. J. Soil. Sci.

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. 2008. Effects of different soil management practices on soil free-living nematode community structure, Eastern China. Can. J. Soil Sci. 88: 115Á127. An investigation was conducted in a Shouguang agroecosystem, Shandong Province, Eastern China, in order to determine the long-term (10Á15 yr) disturbances of three different agricultural management practices. In this study, the main focus was on free-living soil nematodes, as a tool which will help differentiate between treatments according to their sensitivity to physical, chemical, and biota composition. In this study, three treatments were implemented in each of a total of four investigated sites: greenhouses, conventional farmlands, and fallows. Diversity, maturity (MI) and weight indices were used to assess the nematode community. The results indicated that greenhouses have a lower richness (SR), diversity, modified maturity index (SMI), modified maturity index for all nematodes with c-p 02Á5 [SMI (2Á5)], plant parasite index (PPI), PPI/MI values, and fungi-feeding/bacteria-feeding (F/B) ratio, as well as lower basal index (BI) and channel index (CI) and higher dominance. These results elucidated the difference between the three treatments, where the greenhouses were an enriched disturbed system compared with the other treatments and were dominated by bacterivorous nematodes, the fallows were a relatively infertile and stable system dominated by plant parasites, and the conventional farmlands can be positioned between the above two treatments.

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“…NaCl). Ten-fold dilutions were spreadplated in nutritive agar (potato-dextrose agar, with 50 lg ml -1 chlortetracycline and 200 lg ml -1 cycloheximide) for determination of fungal coloniziation (Donegan et al 2001). Plates were incubated at 25°C for 72 h and the colony-forming units (CFUs) were counted.…”

Section: Site and Litter Characterizationmentioning

confidence: 99%

Do soil organisms affect aboveground litter decomposition in the semiarid Patagonian steppe, Argentina?

2011

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Surface litter decomposition in arid and semiarid ecosystems is often faster than predicted by climatic parameters such as annual precipitation or evapotranspiration, or based on standard indices of litter quality such as lignin or nitrogen concentrations. Abiotic photodegradation has been demonstrated to be an important factor controlling aboveground litter decomposition in aridland ecosystems, but soil fauna, particularly macrofauna such as termites and ants, have also been identified as key players affecting litter mass loss in warm deserts. Our objective was to quantify the importance of soil organisms on surface litter decomposition in the Patagonian steppe in the absence of photodegradative effects, to establish the relative importance of soil organisms on rates of mass loss and nitrogen release. We estimated the relative contribution of soil fauna and microbes to litter decomposition of a dominant grass using litterboxes with variable mesh sizes that excluded groups of soil fauna based on size class (10, 2, and 0.01 mm), which were placed beneath shrub canopies. We also employed chemical repellents (naphthalene and fungicide). The exclusion of macro- and mesofauna had no effect on litter mass loss over 3 years (P = 0.36), as litter decomposition was similar in all soil fauna exclusions and naphthalene-treated litter. In contrast, reduction of fungal activity significantly inhibited litter decomposition (P < 0.001). Although soil fauna have been mentioned as a key control of litter decomposition in warm deserts, biogeographic legacies and temperature limitation may constrain the importance of these organisms in temperate aridlands, particularly in the southern hemisphere.

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Soil and litter organisms in Pacific northwest forests under different management practices

Cited by 36 publications

References 44 publications

Response of soil invertebrates to disturbance across three resource regions in North Carolina

Response of soil invertebrates to disturbance across three resource regions in North Carolina

Effects of different soil management practices on soil free-living nematode community structure, Eastern China

Do soil organisms affect aboveground litter decomposition in the semiarid Patagonian steppe, Argentina?

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