An experimental evaluation of diversity indices as environmental discriminators

Robinson, James V.; Sandgren, Craig D.

doi:10.1007/bf00014879

Cited by 19 publications

(8 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The results of the present study also agree with the findings of Robinson & Sandgren (1984) who identified H' and J' as efficient discriminators between different experimental environmental regimes, and with Read et al (1977) who found that chlorophyll-a and Faecal coliforms were the significant variables discriminating stations in the Firth of Forth estuary, UK.…”

Section: Resultssupporting

confidence: 82%

“…Biological communities can be best studied by multivariate analyses (Green & Vascotto, 1978). A good example has been provided by Ross & Wallace (1983) in the case of Hydropsychid larvae in a Texas stream, while Robinson & Sandgren (1984) recently demonstrated the use of multiple discriminant analysis in a study of diversity indices as environmental discriminators.…”

Section: Introduction Materials and Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Water quality studies on Buckingham Canal (Madras, India) ? A discriminant analysis

Ravichandran

1987

Hydrobiologia

View full text Add to dashboard Cite

Stepwise multiple discriminant analysis was applied to a two year water quality monitoring study of the Buckingham Canal at Madras, India. The variables were divided into 1. physical and chemical 2. pollutants; and 3. biological, to test which group is efficient in discriminating stations which differ in water quality. Biological variables obtained higher loadings on the discriminant functions than the other two groups. The derived discriminant functions were tested for their discriminating power through the classification phase with the same raw data. The 'Hit and Misses' tables of classification indicate that 81.66% of the samples were correctly classified by the biological variables, against only 46.66% of the samples in the case of physical and chemical variables and 48.33% in the case of pollutants.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Introduction Materials and Methodsmentioning

confidence: 99%

Water quality studies on Buckingham Canal (Madras, India) ? A discriminant analysis

Ravichandran

1987

Hydrobiologia

View full text Add to dashboard Cite

show abstract

“…Such indices have also been used in microbial ecology [10,20,21]. Furthermore, it has already been pointed out that an individual human can be considered as an isolated biotope for his own microorganisms [22].…”

Section: Discussionmentioning

confidence: 99%

Diversity studies of salmonella incidents in some domestic livestock and their potential relevance as indicators of niche width

Hunter¹,

Izsák²

1990

Epidemiol. Infect.

View full text Add to dashboard Cite

SUMMARYThis study attempts to determine whether or not livestock are becoming more susceptible to epidemics of salmonella infections by the analysis of published data on the annual number of reported infections in various animals. The number of incidents reported each year may be subject to a variety of biases due to temporal and geographical differences in reporting practices. This study analysed these reports by the calculation of diversity indices which are not subject to some of these potential biases. The relationship between the ecological concept of niche width and the diversity of species or types occupying that niche is discussed. The diversity of salmonella types reported in fowl has shown a highly significant decline over the 13-year period 1976–88. It is suggested that this declining diversity may be related to the declining niche width of the biotope available to this pathogen. Although speculative, this reduction in niche width could be related to a declining genetic diversity in the host animals or to an increasing intensification of animal husbandry.

show abstract

“…The Shannon-Weiner Index (H) and the Simpson's Reciprocal Index (D) of the soil microbial community were determined for each treatment because they differ in sensitivity to changes in rare or abundant species in a sample. The Simpson's Reciprocal Index is more sensitive to changes in the most abundant species, whereas the Shannon-Weiner Index is more sensitive changes in rare species in a community (Davis and Smith 2001;Robinson and Sandgren 1984).…”

Section: Microbial Community Analysismentioning

confidence: 99%

Short-term plant species impact on microbial community structure in soils with long-term agricultural history

Maul

Drinkwater

2009

Plant Soil

View full text Add to dashboard Cite

The goal of our study was to capture the short-term effects of individual plant species on an established microbial community in a soil with a welldefined agricultural history. Using biochemical and molecular techniques we quantified the effects of plant species on changes in the soil microbial community over an 8-week time-course. We conducted a greenhouse experiment using field soil from a site that was managed as a Zea mays monoculture for over 50 years. The conditioned soil provided a baseline from which changes in microbial community composition through the effects of newly introduced plants could be determined. Within a short time frame (8 weeks), introduced plants influenced the soil microbial community in ways unique to each plant. Some species (Fagopyrm esculentum and xTriticosecale spp.) resulted in an increase of total microbial community richness, diversity and the stimulation of new microbial species not associated with the legacy vegetation. Other plants (Vicia villosa and Lolium multiflorum) tended to reduce community diversity. We suggest root surface area is good general predictor of rhizosphere microbial community diversity, but in some cases other plant traits may have dominant influence on plant-induced changes in microbial community composition.

show abstract

An experimental evaluation of diversity indices as environmental discriminators

Cited by 19 publications

References 52 publications

Water quality studies on Buckingham Canal (Madras, India) ? A discriminant analysis

Water quality studies on Buckingham Canal (Madras, India) ? A discriminant analysis

Diversity studies of salmonella incidents in some domestic livestock and their potential relevance as indicators of niche width

Short-term plant species impact on microbial community structure in soils with long-term agricultural history

Contact Info

Product

Resources

About