On Choosing an Appropriate ANOVA for Ecological Experiments

Jianming, Shen

doi:10.2307/3545965

Cited by 6 publications

(4 citation statements)

References 2 publications

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“…When a significant effect was observed, we performed Oneway ANOVA for each site and corrected the F-ratio for this mixed ANOVA model ͑McKone and Lively 1993; Lively and Mckone 1994;Shen 1995͒. The unburned site was used only for qualitative comparisons as no replicates could be found in the studied sites.…”

Section: Discussionmentioning

confidence: 99%

Effects of fire recurrence in Quercus coccifera L. shrublands of the Valencia Region (Spain): II. plant and soil nutrients

2005

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The consequences of fire recurrence ͑1, 2 and 3 fires in 16 years͒ on plant and soil C, N, P and K from Quercus coccifera garrigues were analysed in the Valencia Region ͑E Spain͒. Plant and forest floor ͑L horizon͒ nutrient concentrations either changed weakly or showed no change with fire recurrence. At the soil surface ͑0-2.5 cm͒, soil potential mineralisable nitrogen increased and available P decreased after an initial increase, whereas exchangeable K was not affected by successive fires. However, the significance of those observed trends for N and P was site-dependent. Despite the rapid formation of the L soil horizon, fire recurrence did not permit the development of the whole forest floor profile observed in the unburned garrigues. These organic layers contained a great proportion of the total nutrient pool, especially for N. Forest-floor and aboveground plant combustion by fire may produce significant losses of N and P compared with those available in mineral soil, whereas soil exchangeable K is large enough to replace these losses. Belowground nutrient reserves may account for the quick recovery of the Quercus coccifera aboveground biomass although successive fires could deplete these reserves and produce a loss of biomass and productivity in this species.

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Section: Discussionmentioning

confidence: 99%

Effects of fire recurrence in Quercus coccifera L. shrublands of the Valencia Region (Spain): II. plant and soil nutrients

2005

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“…The data were first analyzed as a nested design using PROC MIXED in SAS, 6 with blocks nested within sites. A nested design was used because treatments were randomized within blocks but not across sites and because sites differed in field age, management history, sheep sorrel susceptibility to hexazinone, and organic matter content (Shen 1995). Sites were then analyzed separately because of the known differences between sites that were of interest and because blocks nested within sites was significant (P , 0.0001).…”

Section: Methodsmentioning

confidence: 99%

The Impacts of Fertilizer and Hexazinone on Sheep Sorrel (Rumex acetosella) Growth Patterns in Lowbush Blueberry Fields

et al. 2011

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Sheep sorrel is an invasive, creeping perennial weed of lowbush blueberry fields that decreases yields and hinders harvest. Much of the basic phenology of sheep sorrel in blueberry fields is unknown and not documented in peer-reviewed journals. Three levels of fertilizer (0, 20, and 40 kg N ha−1) and two levels of hexazinone (0 and 1.92 kg ai ha−1) were applied to three vegetative-year blueberry fields to determine their effects on root and shoot growth, biomass allocation, and seed production of sheep sorrel plants. Hexazinone efficacy varied widely between sites, but suppressed shoot biomass, achene number and weight, and reproductive biomass, as well as the reproductive : shoot biomass ratio. Fertilizer tended to increase achene number and increased sheep sorrel shoot biomass in the absence of hexazinone, but had no effect on achene weight, root biomass, or reproductive biomass. When fertilizer was applied, sheep sorrel allocated resources to sexual reproduction at the expense of vegetative growth.

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Section: Methodsmentioning

confidence: 99%

Hexazinone and Fertilizer Impacts on Sheep Sorrel (Rumex acetosella) in Wild Blueberry

2010

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Sheep sorrel is an invasive, creeping perennial weed of lowbush blueberry fields. It is one of the most prominent weeds in blueberry fields in Nova Scotia and is responsible for decreasing yields. Three levels of fertilizer (0, 20, 40 kg N ha−1) and two levels of hexazinone (0 or 1.92 kg ai ha−1) were applied to experimental plots to determine their effects on sheep sorrel density. Sprout-year hexazinone reduced sheep sorrel densities, which led to increased yields. Fertilizer increased weed density in the absence of herbicides, had no effect on density in the presence of herbicides, tended to have no impact on floral buds, and did not increase yields. Fruiting-year hexazinone decreased sheep sorrel densities in some situations, but did not result in yield increases.

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On Choosing an Appropriate ANOVA for Ecological Experiments

Cited by 6 publications

References 2 publications

Effects of fire recurrence in Quercus coccifera L. shrublands of the Valencia Region (Spain): II. plant and soil nutrients

Effects of fire recurrence in Quercus coccifera L. shrublands of the Valencia Region (Spain): II. plant and soil nutrients

The Impacts of Fertilizer and Hexazinone on Sheep Sorrel (Rumex acetosella) Growth Patterns in Lowbush Blueberry Fields

Hexazinone and Fertilizer Impacts on Sheep Sorrel (Rumex acetosella) in Wild Blueberry

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