A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.

Although rarely acknowledged, our understanding of how competition is modulated by environmental drivers is severely hampered by our dependence on indirect measurements of outcomes, rather than the process of competition. To overcome this, we made direct measurements of plant competition for soil ni...

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Autores principales:	Clare J Trinder, Rob W Brooker, Hazel Davidson, David Robinson
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/4dcf26f12e114e129e6aa9156f6961c0
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spelling	oai:doaj.org-article:4dcf26f12e114e129e6aa9156f6961c02021-11-18T07:30:32ZA new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.1932-620310.1371/journal.pone.0029413https://doaj.org/article/4dcf26f12e114e129e6aa9156f6961c02012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22247775/?tool=EBIhttps://doaj.org/toc/1932-6203Although rarely acknowledged, our understanding of how competition is modulated by environmental drivers is severely hampered by our dependence on indirect measurements of outcomes, rather than the process of competition. To overcome this, we made direct measurements of plant competition for soil nitrogen (N). Using isotope pool-dilution, we examined the interactive effects of soil resource limitation and climatic severity between two common grassland species. Pool-dilution estimates the uptake of total N over a defined time period, rather than simply the uptake of ¹⁵N label, as used in most other tracer experiments. Competitive uptake of N was determined by its available form (NO₃⁻ or NH₄⁺). Soil N availability had a greater effect than the climatic conditions (location) under which plants grew. The results did not entirely support either of the main current theories relating the role of competition to environmental conditions. We found no evidence for Tilman's theory that competition for soil nutrients is stronger at low, compared with high nutrient levels and partial support for Grime's theory that competition for soil nutrients is greater under potentially more productive conditions. These results provide novel insights by demonstrating the dynamic nature of plant resource competition.Clare J TrinderRob W BrookerHazel DavidsonDavid RobinsonPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 1, p e29413 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Clare J Trinder Rob W Brooker Hazel Davidson David Robinson A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
description	Although rarely acknowledged, our understanding of how competition is modulated by environmental drivers is severely hampered by our dependence on indirect measurements of outcomes, rather than the process of competition. To overcome this, we made direct measurements of plant competition for soil nitrogen (N). Using isotope pool-dilution, we examined the interactive effects of soil resource limitation and climatic severity between two common grassland species. Pool-dilution estimates the uptake of total N over a defined time period, rather than simply the uptake of ¹⁵N label, as used in most other tracer experiments. Competitive uptake of N was determined by its available form (NO₃⁻ or NH₄⁺). Soil N availability had a greater effect than the climatic conditions (location) under which plants grew. The results did not entirely support either of the main current theories relating the role of competition to environmental conditions. We found no evidence for Tilman's theory that competition for soil nutrients is stronger at low, compared with high nutrient levels and partial support for Grime's theory that competition for soil nutrients is greater under potentially more productive conditions. These results provide novel insights by demonstrating the dynamic nature of plant resource competition.
format	article
author	Clare J Trinder Rob W Brooker Hazel Davidson David Robinson
author_facet	Clare J Trinder Rob W Brooker Hazel Davidson David Robinson
author_sort	Clare J Trinder
title	A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
title_short	A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
title_full	A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
title_fullStr	A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
title_full_unstemmed	A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
title_sort	new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/4dcf26f12e114e129e6aa9156f6961c0
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A new hammer to crack an old nut: interspecific competitive resource capture by plants is regulated by nutrient supply, not climate.

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