Reproductive Allocation in Artemisia tridentata ssp. vaseyana: Effects of Dispersion Pattern, Nitrogen and Water

Carpenter, Alan T.; West, Neil E.

doi:10.2307/2995953

Cited by 5 publications

(6 citation statements)

References 19 publications

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“…These results suggest that fertilization would enhance vegetative growth to the detriment of floral bud induction when there is competition. A similar result was obtained by Carpenter & West (1988), who found a greater biomass allocation to vegetative structures than to reproductive ones after irrigation and N-fertilization in Artemisia tridentata ssp. vaseyana.…”

Section: Discussionsupporting

confidence: 86%

Effects of nutrient availability and neighbours on shoot growth, resprouting and flowering of Erica multiflora

Vila

Terradas

1995

J Vegetation Science

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Abstract. To test if low soil fertility and competition limit the performance of Mediterranean shrubs, and if the effects of competition on plant performance were modified by soil fertility, we subjected shrubs of Erica multiflora to a factorial field experiment of fertilization and removal of neighbours around target plants. After 18 months of treatment, fertilization had stimulated the growth of pre‐existent sprouts and biomass allocation to stems into new sprouts, but decreased the frequency of sprout flowering. Removal of neighbours increased the number and biomass of new sprouts, the probability of sprout flowering and the biomass of flowers. Fertilization slightly enhanced sprout recruitment and the probability of sprout flowering when neighbours were removed, but did not modify the other parameters of plant performance. According to our results, both low soil fertility and competition limited plant performance. Competition was slightly more intense in fertilized plants, but only in determining sprout and flowering bud stimulation.

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Section: Discussionsupporting

confidence: 86%

Effects of nutrient availability and neighbours on shoot growth, resprouting and flowering of Erica multiflora

Vila

Terradas

1995

J Vegetation Science

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“…1979;Inouye etal. 1980;Carpenter & West 1988;Fisher et al 1988;Gutierrez & Whitford 1988;Manning & Barbour 1988;Sharifi et al 1988), anddune-grasslands (van der Maarel 1981;de Jong & Klinkhamer 1988). There is an even greater lack of data on the effects of manipulating light (Caldwell etal.…”

Section: Types Of Resource Manipulationsmentioning

confidence: 99%

“…rainfall) are great (e.g. Carpenter & West 1988). Moreover, a particular resource may be manipulated in such a manner that it indirectly affects another resource.…”

Section: Limitations Of Designmentioning

confidence: 99%

Resource manipulations in natural vegetation: a review

1989

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This paper reviews the effects that resource manipulations, especially nutrient additions, have on productivity, diversity, species interactions and succession in natural and semi-natural low-growth-form terrestrial vegetation. In most studies, fertilization has resulted in an increase in productivity with a concomitant decrease in species diversity. Plant community productivity in nutrient-poor habitats (e.g. arctic tundra) however, has been relatively little affected by nutrient additions. Results from several fertilization experiments in nutrient-poor habitats indicate that competition may be an important component of community dynamics. Resource additions generally do not affect co-occurring species equally. In many cases, this results from an alteration of the relative competitive abilities of species. Several short-term fertilization studies have suggested that the rate of succession is increased by the addition of nutrients. Opposite trends however, have been reported in long-term studies. Contradictory results among some resource manipulation studies appear to stem largely from design limitations (e.g. only one resource was manipulated). Variability in habitat fertility, the type of resource added and the duration of enrichment also contribute to the difficulties involved in interpreting and comparing field experiments. A pluralistic approach combining glasshouse studies with both neighbour and resource manipulations in the field can be expected to lead to a greater depth of understanding of current controversies over the effects of habitat fertility on the intensity of competition and the relationship between competitive ability and tolerance of resource impoverishment.

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“…Reproductive modules, however, consistently had higher transpiration rates." They reported that supplemental watering stimulated inflorescence, but not vegetative growth (also see Carpenter and West 1988;Evans and others 1991). Evans and others (1991, p. 676) …”

Section: Seed Production ________________ Reproductive Growthmentioning

confidence: 99%

“…Production from native stands of big sagebrush can range from 0 achenes or seeds per acre to about 20 million seeds per acre (Young and others 1989). Achene or seed production, however, can be influenced by a number of factors: genetic potential expressed at the subspecies and populations level, site differences, years (wet versus dry), intra-and interspecific competition, diseases, insects, excessive browsing, and plant age (Booth and others 2004;Carpenter and West 1988;Welch and Nelson 1995;Young and others 1989).…”

Section: Seed Increase Gardensmentioning

confidence: 99%

Big sagebrush: A sea fragmented into lakes, ponds, and puddles

Welch¹

2005

107

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Pioneers traveling along the Oregon Trail from western Nebraska, through Wyoming and southern Idaho and into eastern Oregon, referred to their travel as an 800 mile journey through a sea of sagebrush, mainly big sagebrush (Artemisia tridentata). Today approximately 50 percent of the sagebrush sea has given way to agriculture, cities and towns, and other human developments. What remains is further fragmented by range management practices, creeping expansion of woodlands, alien weed species, and the historic view that big sagebrush is a worthless plant. Two ideas are promoted in this report: (1) big sagebrush is a nursing mother to a host of organisms that range from microscopic fungi to large mammals, and (2) many range management practices applied to big sagebrush ecosystems are not science based.

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Reproductive Allocation in Artemisia tridentata ssp. vaseyana: Effects of Dispersion Pattern, Nitrogen and Water

Cited by 5 publications

References 19 publications

Effects of nutrient availability and neighbours on shoot growth, resprouting and flowering of Erica multiflora

Effects of nutrient availability and neighbours on shoot growth, resprouting and flowering of Erica multiflora

Resource manipulations in natural vegetation: a review

Big sagebrush: A sea fragmented into lakes, ponds, and puddles

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