Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile

Few studies have investigated the long-term evolution of nutrient limitation in ecosystems developed on volcanic soils. To approach the problem, we used "space for time substitution" to compare sites with the same state factors, except for the time elapsed since disturbance. Forests of Con...

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Autores principales:	GALLARDO,MARÍA-BELÉN, PÉREZ,CECILIA, NÚÑEZ-ÁVILA,MARIELA, ARMESTO,JUAN J.
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2012
Materias:	N/P ratio phosphorus primary succession retrogression volcanic soils
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000300004
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spelling	oai:scielo:S0716-078X20120003000042013-11-04Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, ChileGALLARDO,MARÍA-BELÉNPÉREZ,CECILIANÚÑEZ-ÁVILA,MARIELAARMESTO,JUAN J. N/P ratio phosphorus primary succession retrogression volcanic soils Few studies have investigated the long-term evolution of nutrient limitation in ecosystems developed on volcanic soils. To approach the problem, we used "space for time substitution" to compare sites with the same state factors, except for the time elapsed since disturbance. Forests of Conguillio National Park in southern of Chile occur on volcanic soils that developed from lava flows and ash deposits of different ages originated from the activity of Llaima volcano. In this study we evaluate the patterns of change in carbon, nitrogen and phosphorus in soils and leaves, as well as changes in tree diversity and basal area along a chronosequence of volcanic substrates from 50 to 60,000 years AP (eight sites). We assessed the evolution of N and P limitation in plants by comparing foliar N/P ratios and the efficiency in the use of nutrients through foliar C/P and C/N ratios. Values of total C, N and P in surface soils were low in the first 250 years of succession, increasing up to a maximum concentration at intermediate stages of succession (300-700 yr), to decline in later successional stages, a pattern also observed in a volcanic chronosequence from Hawaii. We found a decrease in basal area and an increase in diversity of woody species in advanced stages of the chronosequence. Foliar N and P concentrations slightly increased through the chronosequence in both evergreen and deciduous tree species. The foliar N/P ratio did not change along the chronosequence in both deciduous and evergreen species, but differed between evergreen and deciduous trees. The successional increase in tree diversity is explicated by a greater proportion of evergreen angiosperms with efficient P use. Despite the retrogression phase documented by more the decrease in the total contents of N and P in soils, we did not detect a similar decline in the foliar contents of N and P, which suggests that plant and soil nutrient contents are decoupled.info:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.85 n.3 20122012-09-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000300004en10.4067/S0716-078X2012000300004
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	N/P ratio phosphorus primary succession retrogression volcanic soils
spellingShingle	N/P ratio phosphorus primary succession retrogression volcanic soils GALLARDO,MARÍA-BELÉN PÉREZ,CECILIA NÚÑEZ-ÁVILA,MARIELA ARMESTO,JUAN J. Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
description	Few studies have investigated the long-term evolution of nutrient limitation in ecosystems developed on volcanic soils. To approach the problem, we used "space for time substitution" to compare sites with the same state factors, except for the time elapsed since disturbance. Forests of Conguillio National Park in southern of Chile occur on volcanic soils that developed from lava flows and ash deposits of different ages originated from the activity of Llaima volcano. In this study we evaluate the patterns of change in carbon, nitrogen and phosphorus in soils and leaves, as well as changes in tree diversity and basal area along a chronosequence of volcanic substrates from 50 to 60,000 years AP (eight sites). We assessed the evolution of N and P limitation in plants by comparing foliar N/P ratios and the efficiency in the use of nutrients through foliar C/P and C/N ratios. Values of total C, N and P in surface soils were low in the first 250 years of succession, increasing up to a maximum concentration at intermediate stages of succession (300-700 yr), to decline in later successional stages, a pattern also observed in a volcanic chronosequence from Hawaii. We found a decrease in basal area and an increase in diversity of woody species in advanced stages of the chronosequence. Foliar N and P concentrations slightly increased through the chronosequence in both evergreen and deciduous tree species. The foliar N/P ratio did not change along the chronosequence in both deciduous and evergreen species, but differed between evergreen and deciduous trees. The successional increase in tree diversity is explicated by a greater proportion of evergreen angiosperms with efficient P use. Despite the retrogression phase documented by more the decrease in the total contents of N and P in soils, we did not detect a similar decline in the foliar contents of N and P, which suggests that plant and soil nutrient contents are decoupled.
author	GALLARDO,MARÍA-BELÉN PÉREZ,CECILIA NÚÑEZ-ÁVILA,MARIELA ARMESTO,JUAN J.
author_facet	GALLARDO,MARÍA-BELÉN PÉREZ,CECILIA NÚÑEZ-ÁVILA,MARIELA ARMESTO,JUAN J.
author_sort	GALLARDO,MARÍA-BELÉN
title	Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
title_short	Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
title_full	Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
title_fullStr	Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
title_full_unstemmed	Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile
title_sort	decoupling of soil development and plant succession along a 60000 years chronosequence in llaima volcano, chile
publisher	Sociedad de Biología de Chile
publishDate	2012
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2012000300004
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Decoupling of soil development and plant succession along a 60000 years chronosequence in Llaima Volcano, Chile

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