Tropical tree growth is correlated with soil phosphorus, potassium, and calcium, though not for legumes

Tropical forest productivity is widely assumed to be limited by soil phosphorus (P), but biogeochemical processes that deplete P also could deplete base cations, suggesting multiple resource limitation. Limitation by several resources could arise from species and functional diversity and from variat...

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Veröffentlicht in:Ecological monographs 2012-05, Vol.82 (2), p.189-203
Hauptverfasser: Baribault, Thomas W, Kobe, Richard K, Finley, Andrew O
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description Tropical forest productivity is widely assumed to be limited by soil phosphorus (P), but biogeochemical processes that deplete P also could deplete base cations, suggesting multiple resource limitation. Limitation by several resources could arise from species and functional diversity and from variation among groups in resource requirements, including ecophysiological strategies that minimize P limitation. We hypothesized that tree growth is positively related to soil base cation and P availability and negatively related to local competition; Fabaceae growth is weakly correlated with soil resources if fixed N is used indirectly to acquire other resources; growth of species with low wood density is more strongly related to soil resource availability than that of species with high wood density. Diameter growth and soil resource availability were measured in five mapped stands situated across natural soil resource gradients in lowland wet tropical forest (La Selva Biological Station, Costa Rica). Soil resource availability, and associated uncertainty, was estimated for each tree using a Bayesian multivariate spatial regression model, with individual tree growth being a function of diameter, local neighborhood, and soil resources. Separately, site-level mean tree growth and resource availability were modeled using linear regression. Individual diameter growth and site mean basal area increment correlated with soil base cations and P, but rarely with N; individual growth correlated negatively with neighborhood index for only three species. Growth of Fabaceae was unrelated to soil resources at both individual and site levels. When species were categorized by wood density, growth was related to soil P or base cation availability, with the strongest correlation between the lowest-density species and soil P. Several resources may limit tropical forest productivity, because tree growth was similarly correlated with soil P and base cations, but functional groups responded differently. Negligible growth relationships with soil resources in Fabaceae suggest that N fixation may alleviate mineral nutrient limitations. Correlations of soil P with growth of species of low wood density and base cations with species of higher density suggests variation in resource demands among functional groups. Thus, tropical tree growth may be limited by base cations and/or P, with degree and type of resource limitation dependent on functional or taxonomic group.
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Limitation by several resources could arise from species and functional diversity and from variation among groups in resource requirements, including ecophysiological strategies that minimize P limitation. We hypothesized that tree growth is positively related to soil base cation and P availability and negatively related to local competition; Fabaceae growth is weakly correlated with soil resources if fixed N is used indirectly to acquire other resources; growth of species with low wood density is more strongly related to soil resource availability than that of species with high wood density. Diameter growth and soil resource availability were measured in five mapped stands situated across natural soil resource gradients in lowland wet tropical forest (La Selva Biological Station, Costa Rica). Soil resource availability, and associated uncertainty, was estimated for each tree using a Bayesian multivariate spatial regression model, with individual tree growth being a function of diameter, local neighborhood, and soil resources. Separately, site-level mean tree growth and resource availability were modeled using linear regression. Individual diameter growth and site mean basal area increment correlated with soil base cations and P, but rarely with N; individual growth correlated negatively with neighborhood index for only three species. Growth of Fabaceae was unrelated to soil resources at both individual and site levels. When species were categorized by wood density, growth was related to soil P or base cation availability, with the strongest correlation between the lowest-density species and soil P. Several resources may limit tropical forest productivity, because tree growth was similarly correlated with soil P and base cations, but functional groups responded differently. Negligible growth relationships with soil resources in Fabaceae suggest that N fixation may alleviate mineral nutrient limitations. Correlations of soil P with growth of species of low wood density and base cations with species of higher density suggests variation in resource demands among functional groups. 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Soil resource availability, and associated uncertainty, was estimated for each tree using a Bayesian multivariate spatial regression model, with individual tree growth being a function of diameter, local neighborhood, and soil resources. Separately, site-level mean tree growth and resource availability were modeled using linear regression. Individual diameter growth and site mean basal area increment correlated with soil base cations and P, but rarely with N; individual growth correlated negatively with neighborhood index for only three species. Growth of Fabaceae was unrelated to soil resources at both individual and site levels. When species were categorized by wood density, growth was related to soil P or base cation availability, with the strongest correlation between the lowest-density species and soil P. Several resources may limit tropical forest productivity, because tree growth was similarly correlated with soil P and base cations, but functional groups responded differently. 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Psychology</subject><subject>General aspects</subject><subject>La Selva Biological Station, Costa Rica</subject><subject>legumes</subject><subject>neighborhood model</subject><subject>Phosphorus</subject><subject>phosphorus limitation</subject><subject>Physical growth</subject><subject>Plant ecology</subject><subject>plant-soil interactions</subject><subject>quantitative trait</subject><subject>resource limitation</subject><subject>Soil ecology</subject><subject>Soil fertility</subject><subject>Soil resources</subject><subject>Tree growth</subject><subject>Trees</subject><subject>Tropical forests</subject><subject>tropical trees</subject><subject>Wood density</subject><issn>0012-9615</issn><issn>1557-7015</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2012</creationdate><recordtype>article</recordtype><recordid>eNp1kd-L1DAQx4MouK4--AcIARE8uJ6Z_Giax2O5U-HEl_O55NrpbpduUzMp6_73Zt1jETkfwjCZz_c7kwljb0FcQeXEJ4ACBKgreMYWYIwtrADznC2EAFm4EsxL9opoK465cwu2vo9h6hs_8BQR-TqGfdrwnngTYsTBJ2z5vs9XFPqBT5tA-cSZLvkUkifq590l92PLs0XzJ0mbMK83fAyJdyHyAdfzDuk1e9H5gfDNY1yyH7c396svxd33z19X13eF11q5Qgst0DwID97a1hrnnLfOttWD8xLLTmuNZQtCqEo0KJWV0hrAqmwVKmytWrKPJ98php8zUqp3PTU4DH7EMFMNQkpTliJ3W7L3_6DbMMcxT5cpMK4qnTgaXpyoJgaiiF09xX7n4yFD9XHlNcCRVzVk9sOjo6e8jy76senpLJDGaW2MyZw-cft-wMP_Deub1TeZP6qSMhey7N1JtqUU4lmmwSqnyr8e5NNhCmON5J8c8gnq3HFquzr9Suo3jiOuNQ</recordid><startdate>201205</startdate><enddate>201205</enddate><creator>Baribault, Thomas W</creator><creator>Kobe, Richard K</creator><creator>Finley, Andrew O</creator><general>Ecological Society of America</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QG</scope><scope>7SN</scope><scope>7SS</scope><scope>C1K</scope><scope>M7N</scope><scope>7ST</scope><scope>7U6</scope></search><sort><creationdate>201205</creationdate><title>Tropical tree growth is correlated with soil phosphorus, potassium, and calcium, though not for legumes</title><author>Baribault, Thomas W ; Kobe, Richard K ; Finley, Andrew O</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4439-4040e5b0a1a77d75999a797d8b9a2e6f444e6d100380ce23722751e86d3e3ed73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2012</creationdate><topic>Animal and plant ecology</topic><topic>Animal, plant and microbial ecology</topic><topic>base cations</topic><topic>Bayesian analysis</topic><topic>Biological and medical sciences</topic><topic>Correlation analysis</topic><topic>Ecological modeling</topic><topic>Fabaceae</topic><topic>Forest ecology</topic><topic>Forest soils</topic><topic>functional groups</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>General aspects</topic><topic>La Selva Biological Station, Costa Rica</topic><topic>legumes</topic><topic>neighborhood model</topic><topic>Phosphorus</topic><topic>phosphorus limitation</topic><topic>Physical growth</topic><topic>Plant ecology</topic><topic>plant-soil interactions</topic><topic>quantitative trait</topic><topic>resource limitation</topic><topic>Soil ecology</topic><topic>Soil fertility</topic><topic>Soil resources</topic><topic>Tree growth</topic><topic>Trees</topic><topic>Tropical forests</topic><topic>tropical trees</topic><topic>Wood density</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Baribault, Thomas W</creatorcontrib><creatorcontrib>Kobe, Richard K</creatorcontrib><creatorcontrib>Finley, Andrew O</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Animal Behavior Abstracts</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Environment Abstracts</collection><collection>Sustainability Science Abstracts</collection><jtitle>Ecological monographs</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Baribault, Thomas W</au><au>Kobe, Richard K</au><au>Finley, Andrew O</au><au>Yavitt, JB</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Tropical tree growth is correlated with soil phosphorus, potassium, and calcium, though not for legumes</atitle><jtitle>Ecological monographs</jtitle><date>2012-05</date><risdate>2012</risdate><volume>82</volume><issue>2</issue><spage>189</spage><epage>203</epage><pages>189-203</pages><issn>0012-9615</issn><eissn>1557-7015</eissn><coden>ECMOAQ</coden><abstract>Tropical forest productivity is widely assumed to be limited by soil phosphorus (P), but biogeochemical processes that deplete P also could deplete base cations, suggesting multiple resource limitation. Limitation by several resources could arise from species and functional diversity and from variation among groups in resource requirements, including ecophysiological strategies that minimize P limitation. We hypothesized that tree growth is positively related to soil base cation and P availability and negatively related to local competition; Fabaceae growth is weakly correlated with soil resources if fixed N is used indirectly to acquire other resources; growth of species with low wood density is more strongly related to soil resource availability than that of species with high wood density. Diameter growth and soil resource availability were measured in five mapped stands situated across natural soil resource gradients in lowland wet tropical forest (La Selva Biological Station, Costa Rica). Soil resource availability, and associated uncertainty, was estimated for each tree using a Bayesian multivariate spatial regression model, with individual tree growth being a function of diameter, local neighborhood, and soil resources. Separately, site-level mean tree growth and resource availability were modeled using linear regression. Individual diameter growth and site mean basal area increment correlated with soil base cations and P, but rarely with N; individual growth correlated negatively with neighborhood index for only three species. Growth of Fabaceae was unrelated to soil resources at both individual and site levels. When species were categorized by wood density, growth was related to soil P or base cation availability, with the strongest correlation between the lowest-density species and soil P. Several resources may limit tropical forest productivity, because tree growth was similarly correlated with soil P and base cations, but functional groups responded differently. Negligible growth relationships with soil resources in Fabaceae suggest that N fixation may alleviate mineral nutrient limitations. Correlations of soil P with growth of species of low wood density and base cations with species of higher density suggests variation in resource demands among functional groups. Thus, tropical tree growth may be limited by base cations and/or P, with degree and type of resource limitation dependent on functional or taxonomic group.</abstract><cop>Washington, DC</cop><pub>Ecological Society of America</pub><doi>10.1890/11-1013.1</doi><tpages>15</tpages></addata></record>
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subjects Animal and plant ecology
Animal, plant and microbial ecology
base cations
Bayesian analysis
Biological and medical sciences
Correlation analysis
Ecological modeling
Fabaceae
Forest ecology
Forest soils
functional groups
Fundamental and applied biological sciences. Psychology
General aspects
La Selva Biological Station, Costa Rica
legumes
neighborhood model
Phosphorus
phosphorus limitation
Physical growth
Plant ecology
plant-soil interactions
quantitative trait
resource limitation
Soil ecology
Soil fertility
Soil resources
Tree growth
Trees
Tropical forests
tropical trees
Wood density
title Tropical tree growth is correlated with soil phosphorus, potassium, and calcium, though not for legumes
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