No evidence for consistent long-term growth stimulation of 13 tropical tree species: results from tree-ring analysis.
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| Title: | No evidence for consistent long-term growth stimulation of 13 tropical tree species: results from tree-ring analysis. |
|---|---|
| Authors: | Groenendijk, Peter1, Sleen, Peter1,2, Vlam, Mart1, Bunyavejchewin, Sarayudh3, Bongers, Frans1, Zuidema, Pieter A.1,4 |
| Source: | Global Change Biology. Oct2015, Vol. 21 Issue 10, p3762-3776. 15p. 3 Charts, 3 Graphs, 1 Map. |
| Subjects: | Forest monitoring, Tree-rings, Tree growth, Carbon cycle, Dendrochronology |
| Abstract: | The important role of tropical forests in the global carbon cycle makes it imperative to assess changes in their carbon dynamics for accurate projections of future climate-vegetation feedbacks. Forest monitoring studies conducted over the past decades have found evidence for both increasing and decreasing growth rates of tropical forest trees. The limited duration of these studies restrained analyses to decadal scales, and it is still unclear whether growth changes occurred over longer time scales, as would be expected if CO2-fertilization stimulated tree growth. Furthermore, studies have so far dealt with changes in biomass gain at forest-stand level, but insights into species-specific growth changes - that ultimately determine community-level responses - are lacking. Here, we analyse species-specific growth changes on a centennial scale, using growth data from tree-ring analysis for 13 tree species (~1300 trees), from three sites distributed across the tropics. We used an established (regional curve standardization) and a new (size-class isolation) growth-trend detection method and explicitly assessed the influence of biases on the trend detection. In addition, we assessed whether aggregated trends were present within and across study sites. We found evidence for decreasing growth rates over time for 8-10 species, whereas increases were noted for two species and one showed no trend. Additionally, we found evidence for weak aggregated growth decreases at the site in Thailand and when analysing all sites simultaneously. The observed growth reductions suggest deteriorating growth conditions, perhaps due to warming. However, other causes cannot be excluded, such as recovery from large-scale disturbances or changing forest dynamics. Our findings contrast growth patterns that would be expected if elevated CO2 would stimulate tree growth. These results suggest that commonly assumed growth increases of tropical forests may not occur, which could lead to erroneous predictions of carbon dynamics of tropical forest under climate change. [ABSTRACT FROM AUTHOR] |
| Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 109324083 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: No evidence for consistent long-term growth stimulation of 13 tropical tree species: results from tree-ring analysis. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Groenendijk%2C+Peter%22">Groenendijk, Peter</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Sleen%2C+Peter%22">Sleen, Peter</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Vlam%2C+Mart%22">Vlam, Mart</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Bunyavejchewin%2C+Sarayudh%22">Bunyavejchewin, Sarayudh</searchLink><relatesTo>3</relatesTo><br /><searchLink fieldCode="AR" term="%22Bongers%2C+Frans%22">Bongers, Frans</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Zuidema%2C+Pieter+A%2E%22">Zuidema, Pieter A.</searchLink><relatesTo>1,4</relatesTo> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Global+Change+Biology%22">Global Change Biology</searchLink>. Oct2015, Vol. 21 Issue 10, p3762-3776. 15p. 3 Charts, 3 Graphs, 1 Map. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Forest+monitoring%22">Forest monitoring</searchLink><br /><searchLink fieldCode="DE" term="%22Tree-rings%22">Tree-rings</searchLink><br /><searchLink fieldCode="DE" term="%22Tree+growth%22">Tree growth</searchLink><br /><searchLink fieldCode="DE" term="%22Carbon+cycle%22">Carbon cycle</searchLink><br /><searchLink fieldCode="DE" term="%22Dendrochronology%22">Dendrochronology</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The important role of tropical forests in the global carbon cycle makes it imperative to assess changes in their carbon dynamics for accurate projections of future climate-vegetation feedbacks. Forest monitoring studies conducted over the past decades have found evidence for both increasing and decreasing growth rates of tropical forest trees. The limited duration of these studies restrained analyses to decadal scales, and it is still unclear whether growth changes occurred over longer time scales, as would be expected if CO2-fertilization stimulated tree growth. Furthermore, studies have so far dealt with changes in biomass gain at forest-stand level, but insights into species-specific growth changes - that ultimately determine community-level responses - are lacking. Here, we analyse species-specific growth changes on a centennial scale, using growth data from tree-ring analysis for 13 tree species (~1300 trees), from three sites distributed across the tropics. We used an established (regional curve standardization) and a new (size-class isolation) growth-trend detection method and explicitly assessed the influence of biases on the trend detection. In addition, we assessed whether aggregated trends were present within and across study sites. We found evidence for decreasing growth rates over time for 8-10 species, whereas increases were noted for two species and one showed no trend. Additionally, we found evidence for weak aggregated growth decreases at the site in Thailand and when analysing all sites simultaneously. The observed growth reductions suggest deteriorating growth conditions, perhaps due to warming. However, other causes cannot be excluded, such as recovery from large-scale disturbances or changing forest dynamics. Our findings contrast growth patterns that would be expected if elevated CO2 would stimulate tree growth. These results suggest that commonly assumed growth increases of tropical forests may not occur, which could lead to erroneous predictions of carbon dynamics of tropical forest under climate change. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Global Change Biology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1111/gcb.12955 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 3762 Subjects: – SubjectFull: Forest monitoring Type: general – SubjectFull: Tree-rings Type: general – SubjectFull: Tree growth Type: general – SubjectFull: Carbon cycle Type: general – SubjectFull: Dendrochronology Type: general Titles: – TitleFull: No evidence for consistent long-term growth stimulation of 13 tropical tree species: results from tree-ring analysis. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Groenendijk, Peter – PersonEntity: Name: NameFull: Sleen, Peter – PersonEntity: Name: NameFull: Vlam, Mart – PersonEntity: Name: NameFull: Bunyavejchewin, Sarayudh – PersonEntity: Name: NameFull: Bongers, Frans – PersonEntity: Name: NameFull: Zuidema, Pieter A. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 10 Text: Oct2015 Type: published Y: 2015 Identifiers: – Type: issn-print Value: 13541013 Numbering: – Type: volume Value: 21 – Type: issue Value: 10 Titles: – TitleFull: Global Change Biology Type: main |
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