Assessing nematode communities in agroecosystems of varying human intervention

Freckman, Diana W.; Ettema, Christien H.

doi:10.1016/0167-8809(93)90074-y

Cited by 386 publications

(205 citation statements)

References 20 publications

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“…A higher Shannon index means greater diversity. In our study, the index was 1.63, which was lower than that in the agroecosystems reported by Freckman and Ettema (1993). The maturity index, based on the composition of the nematode community, can reflect the degree of disturbance of the soil ecosystem (Bongers 1990).…”

Section: Ecological Indices Of the Nematode Communitycontrasting

confidence: 74%

“…Shannon-Wiener index: (Pen-Mouratov and Steinberger 2005) Simpson diversity (S g ) (which gives more weight to common genera): (Freckman and Ettema 1993) where: p i is the proportion of the i th taxon individual in the total population and S is the number of total population in the i th sample Maturity index (MI) and plant parasite index (PPI):…”

Section: Ecological Indices and Statistical Analysismentioning

confidence: 99%

“…where: v(i) is the c-p (colonizer-persister) (MI for nonplant parasites and PPI for plant parasites) value of taxon i (Bongers 1990, Freckman andEttema 1993), and f(i) is the frequency of that taxon in a sample All data were subjected to the statistical analysis of variance using the SAS model (one-way ANOVA). Additionally, a correlation analysis was conducted using SPPS 12.0 to determine the relationships between soil salt content versus total nematodes and the trophic groups.…”

Section: Ecological Indices and Statistical Analysismentioning

confidence: 99%

“…They constitute one of the most numerically important components of the soil fauna (Warwick et al 2002) and thus significantly impact nutrient cycling and primary productivity in diverse ecosystems. Moreover, nematode populations can respond in predictable ways to ecosystem disturbance (Freckman and Ettema 1993). Therefore, nematode community composition can be used as sensitive indicators of ecosystem change (Bongers 1990).…”

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confidence: 99%

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Distribution of nematodes in wetland soils with difference distance from the Bohai sea 359-366

Wu¹,

Li²,

Shi³

et al. 2008

PLANT SOIL ENVIRON

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In order to elucidate the distribution of soil nematodes in coastal wetlands and the effect of different distance from the sea line on soil nematode communities, we investigated the community structure of soil nematodes in one wetland perpendicularly oriented from Bohai sea coastline. In June 2006, soil samples were collected from the Yellow River Delta wetlands, in Dongying city of Shandong Province, China. Soil nematode communities were analyzed at the depths of 0-10 and 10-20 cm. The results showed that plant parasite nematodes were the most abundant trophic groups in both depths and at four sites. The average relative abundance was 91.33% of the nematode community. Several ecological indices which reflected soil nematode community structure, diversity, maturity and plant parasitism were compared in these four sites. The results indicated that the maturity index (MI) and plant parasitism index (PPI) were more sensitive than the other indices for assessing the response of soil nematode communities to soil of coastal wetland.

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Section: Ecological Indices Of the Nematode Communitycontrasting

confidence: 74%

Section: Ecological Indices and Statistical Analysismentioning

confidence: 99%

Section: Ecological Indices and Statistical Analysismentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Distribution of nematodes in wetland soils with difference distance from the Bohai sea 359-366

Wu¹,

Li²,

Shi³

et al. 2008

PLANT SOIL ENVIRON

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“…Nematodes are abundant and ubiquitous soil fauna; they represent a heterogeneous group that effect crop growth directly or indirectly as consumers of bacteria, fungi and other organisms, regulating decomposition and release of nutrients to the plant (Freckman, and Ettema, 1993). Any change in the soil habitat of nematodes could influence their food source or environment, affecting biodiversity and structure of the community.…”

Section: Introductionmentioning

confidence: 99%

Soil Quality Indicators as Affected by a Long Term Barley-Maize and Maize Cropping Systems

Manachini¹,

Corsini²,

Bocchi³

2009

Ital J Agronomy

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Most soil studies aim a better characterization of the system through indicators. In the present study nematofauna and soil structure were chosen as indicators to be assess soil health as related to agricultural practices. The field research was carried out on the two fodder cropping systems continuous maize (CM, Zea mays L.) and a 3-year rotation of silage-maize -silage-barley (Hordeum vulgare L.) with Italian ryegrass (R3) and grain-maize maintained in these conditions for 18 years. Each crop system was submitted to two management options: 1) the high input level (H), done as a conventional tillage, 2) the low input level (L), where the tillage was replaced by harrowing and the manure was reduced by 30%. The effects of the two different cropping systems was assessed on soil nematofauna and soil physic parameters (structure or aggregate stability). Comparison was made of general composition, trophic structure and biodiversity of the nematofauna collected in both systems. Differences in nematode genera composition and distribution between the two systems were also recorded. The monoculture, compared to the three year rotation, had a negative influence on the nematofauna composition and its ecological succession. The Structural Stability Index (SSI) values indicate that both the cropping systems had a negative effect on the aggregate stability. The results indicate that nematofauna can be used to assess the effects of cropping systems on soil ecosystem, and therefore be considered a good indicator of soil health to integrate information from different chemical or physical indicators.

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Diversity and abundance of macro‐invertebrates on abandoned cattle kraals in a semi‐arid savanna

Muvengwi

Chikorowondo

Mbiba

et al. 2018

Ecology and Evolution

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Abandoned cattle (Bos taurus) kraals are sources of habitat heterogeneity in dystrophic semi‐arid African savannas with a strong positive effect on soil nutrients and plant productivity. However, little is known regarding how macro‐invertebrate assemblages vary between abandoned kraals and the surrounding savanna matrix. We tested whether herbaceous biomass and basal and aerial covers and soil nutrients have an effect on aboveground and belowground macro‐invertebrate assemblages. Twelve abandoned kraals were contrasted with their paired control plots for soil characteristics, herbaceous productivity, and macro‐invertebrate assemblages in Save Valley Conservancy, Zimbabwe. Abandoned kraals had significantly higher concentrations of soil nitrogen (N), phosphorus (P), potassium (K), and calcium (Ca) as well as herbaceous biomass and basal and aerial covers than control plots. Both aboveground and belowground macro‐invertebrate species richness were higher on abandoned kraals. However, only belowground macro‐invertebrate diversity (Shannon H′ and Hill number 1) was significantly higher on abandoned kraals. Soil nutrients and herbaceous productivity had positive and significant correlations with the dominant taxa (Coleoptera, Hymenoptera, Hemiptera, Isoptera, and Myriapoda) on abandoned kraals. These results add to the growing body of evidence that abandoned kraals exert significant effects on savanna spatial heterogeneity years later, with implications on ecosystem processes and functioning.

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Assessing nematode communities in agroecosystems of varying human intervention

Cited by 386 publications

References 20 publications

Distribution of nematodes in wetland soils with difference distance from the Bohai sea 359-366

Distribution of nematodes in wetland soils with difference distance from the Bohai sea 359-366

Soil Quality Indicators as Affected by a Long Term Barley-Maize and Maize Cropping Systems

Diversity and abundance of macro‐invertebrates on abandoned cattle kraals in a semi‐arid savanna

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