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| Web URL(s): | http://www.jstor.org/stable/pdf/3072135.pdf?acceptTC=true
Last checked: 10/06/2015
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Access conditions: Item is within a limited-access website |
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| Publication Type:
| Refereed |
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| Author(s): | Rajaniemi, Tara K. |
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| Author Affiliation: | Department of Biology, University of Michigan, Ann Arbor, Michigan |
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| Title: | Why does fertilization reduce plant species diversity? Testing three competition-based hypotheses |
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| Source: | Journal of Ecology. Vol. 90, No. 2, April 2002, p. 316-324. |
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| Publishing Information: | Blackwell Scientific Publications |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Fertilization; Diversity; Competition; Light
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| Abstract/Contents: | "Plant species diversity drops when fertilizer is added or productivity increases. To explain this, the total competition hypothesis predicts that competition above ground and below ground both become more important, leading to more competitive exclusion, whereas the light competition hypothesis predicts that a shift from below-ground to above-ground competition has a similar effect. The density hypothesis predicts that more above-ground competition leads to mortality of small individuals of all species, and thus a random loss of species from plots. Fertilizer was added to old field plots to manipulate both below-ground and above-ground resources, while shadecloth was used to manipulate above-ground resources alone in tests of these hypotheses. Fertilizer decreased both ramet density and species diversity, and the effect remained significant when density was added as a covariate. Density effects explained only a small part of the drop in diversity with fertilizer. Shadecloth and fertilizer reduced light by the same amount, but only fertilizer reduced diversity. Light alone did not control diversity, as the light competition hypothesis would have predicted, but the combination of above-ground and below-ground competition caused competitive exclusion, consistent with the total competition hypothesis." |
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| Language: | English |
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| References: | 38 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Rajaniemi, T. K. 2002. Why does fertilization reduce plant species diversity? Testing three competition-based hypotheses. J. Ecol. 90(2):p. 316-324. |
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| Web URL(s):
http://www.jstor.org/stable/pdf/3072135.pdf?acceptTC=true
Last checked: 10/06/2015
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: QH 540 .J6 |
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