Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species

The restoration of Nardus grasslands is often hampered by high bioavailability of soil phosphorus and disturbed soil communities. In order to better understand these bottlenecks, we studied Nardus grassland species grown together in communities with fast-growing species in 50-liter pots along a grad...

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Autores principales:	Stephanie Schelfhout, Safaa Wasof, Jan Mertens, Margot Vanhellemont, Andreas Demey, Annelies Haegeman, Eva DeCock, Iris Moeneclaey, Pieter Vangansbeke, Nicole Viaene, Steve Baeyen, Nancy De Sutter, Martine Maes, Wim H. van der Putten, Kris Verheyen, An De Schrijver
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Species-rich grassland Oligotrophic Abiotic threshold Ecological restoration TITAN Competition Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/87a10e41bc944b4cb50634aa90c5a7fc
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spelling	oai:doaj.org-article:87a10e41bc944b4cb50634aa90c5a7fc2021-12-01T04:28:16ZEffects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species1470-160X10.1016/j.ecolind.2020.106880https://doaj.org/article/87a10e41bc944b4cb50634aa90c5a7fc2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20308189https://doaj.org/toc/1470-160XThe restoration of Nardus grasslands is often hampered by high bioavailability of soil phosphorus and disturbed soil communities. In order to better understand these bottlenecks, we studied Nardus grassland species grown together in communities with fast-growing species in 50-liter pots along a gradient of bioavailable phosphorus with or without inoculated soil biota. These mesocosms allowed the plants to freely interact, including competition for light and nutrients.We investigated changes in the plant community composition along the phosphorus gradient using Threshold Indicator Taxa Analysis (TITAN). We found a negative threshold of 11.5 mg POlsen kg−1 with six significant indicator plant species. Above the threshold, a small increase in phosphorus resulted in a disproportionally large drop in biomass for the indicator species, including four typical Nardus grassland species. The decline in these ‘oligotrophic indicator species’ was also linked to increasing plant community biomass, so we suggest the oligotrophic indicator species to be outcompeted for light by fast-growing plant species. We did not find an effect of the soil biota treatment on the biomass of the oligotrophic indicator species, but did observe a positive effect of inoculation with soil biota on the total biomass of the plant community.Interestingly, the threshold for the plant communities in the mesocosm experiment was comparable to the upper bioavailable phosphorus concentrations in remnant Nardus grasslands in northern Belgium. For the restoration of Nardus grasslands, such phosphorus-poor soil conditions appear to be essential, because the plant species that typically occur in these grasslands are able to handle nutrient limitation, but not light limitation.Stephanie SchelfhoutSafaa WasofJan MertensMargot VanhellemontAndreas DemeyAnnelies HaegemanEva DeCockIris MoeneclaeyPieter VangansbekeNicole ViaeneSteve BaeyenNancy De SutterMartine MaesWim H. van der PuttenKris VerheyenAn De SchrijverElsevierarticleSpecies-rich grasslandOligotrophicAbiotic thresholdEcological restorationTITANCompetitionEcologyQH540-549.5ENEcological Indicators, Vol 120, Iss , Pp 106880- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Species-rich grassland Oligotrophic Abiotic threshold Ecological restoration TITAN Competition Ecology QH540-549.5
spellingShingle	Species-rich grassland Oligotrophic Abiotic threshold Ecological restoration TITAN Competition Ecology QH540-549.5 Stephanie Schelfhout Safaa Wasof Jan Mertens Margot Vanhellemont Andreas Demey Annelies Haegeman Eva DeCock Iris Moeneclaey Pieter Vangansbeke Nicole Viaene Steve Baeyen Nancy De Sutter Martine Maes Wim H. van der Putten Kris Verheyen An De Schrijver Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species
description	The restoration of Nardus grasslands is often hampered by high bioavailability of soil phosphorus and disturbed soil communities. In order to better understand these bottlenecks, we studied Nardus grassland species grown together in communities with fast-growing species in 50-liter pots along a gradient of bioavailable phosphorus with or without inoculated soil biota. These mesocosms allowed the plants to freely interact, including competition for light and nutrients.We investigated changes in the plant community composition along the phosphorus gradient using Threshold Indicator Taxa Analysis (TITAN). We found a negative threshold of 11.5 mg POlsen kg−1 with six significant indicator plant species. Above the threshold, a small increase in phosphorus resulted in a disproportionally large drop in biomass for the indicator species, including four typical Nardus grassland species. The decline in these ‘oligotrophic indicator species’ was also linked to increasing plant community biomass, so we suggest the oligotrophic indicator species to be outcompeted for light by fast-growing plant species. We did not find an effect of the soil biota treatment on the biomass of the oligotrophic indicator species, but did observe a positive effect of inoculation with soil biota on the total biomass of the plant community.Interestingly, the threshold for the plant communities in the mesocosm experiment was comparable to the upper bioavailable phosphorus concentrations in remnant Nardus grasslands in northern Belgium. For the restoration of Nardus grasslands, such phosphorus-poor soil conditions appear to be essential, because the plant species that typically occur in these grasslands are able to handle nutrient limitation, but not light limitation.
format	article
author	Stephanie Schelfhout Safaa Wasof Jan Mertens Margot Vanhellemont Andreas Demey Annelies Haegeman Eva DeCock Iris Moeneclaey Pieter Vangansbeke Nicole Viaene Steve Baeyen Nancy De Sutter Martine Maes Wim H. van der Putten Kris Verheyen An De Schrijver
author_facet	Stephanie Schelfhout Safaa Wasof Jan Mertens Margot Vanhellemont Andreas Demey Annelies Haegeman Eva DeCock Iris Moeneclaey Pieter Vangansbeke Nicole Viaene Steve Baeyen Nancy De Sutter Martine Maes Wim H. van der Putten Kris Verheyen An De Schrijver
author_sort	Stephanie Schelfhout
title	Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species
title_short	Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species
title_full	Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species
title_fullStr	Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species
title_full_unstemmed	Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species
title_sort	effects of bioavailable phosphorus and soil biota on typical nardus grassland species in competition with fast-growing plant species
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/87a10e41bc944b4cb50634aa90c5a7fc
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Effects of bioavailable phosphorus and soil biota on typical Nardus grassland species in competition with fast-growing plant species

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