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<export-example>
  <doc>
    <id>28144</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1873</pageFirst>
    <pageLast>1885</pageLast>
    <pageNumber/>
    <edition/>
    <issue>4</issue>
    <volume>109</volume>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-12-14</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Root economics spectrum and construction costs in Mediterranean woody plants: the role of symbiotic associations and the environment</title>
    <abstract language="eng">1.  Many studies have quantified the functional variation of fine root traits to un-derstand the overarching trade-off between maximizing resource acquisition or conservation (root economics spectrum [RES]). However, we know remarkably less on how plant strategies along the RES are actually constrained by the amount of photosynthates required to construct roots (i.e. construction costs, CC) or how below-     ground interactions with symbiotic organisms modify root trait patterns and their relationships with CC.2.  Our main aim was to quantify CC of fine roots (&lt;2  mm) and their underlying compo-nents (carbon, minerals and organic nitrogen concentrations) in 60 Mediterranean woody species with contrasting symbiotic association types (ectomycorrhizas, ar-buscular and ericoid mycorrhizas and N-fixing bacteria). We examined (a) whether the covariation among fine root traits along the RES was related to the intrinsic cost of producing roots and whether this relationship was dependent on the type of root symbiosis; (b) whether the relationship of each CC component with the RES was dependent on the type of root symbiosis and (c) whether soil water and nutrient availability determined differences in CC across sites.3.  According to the RES hypothesis, fine root traits showed a main covariation trend (acquisition vs. conservation), defined by the first PCA axis, which also segregated species by their two main contrasting symbiotic types (arbuscular and ectomycor-rhizal). We found a positive relationship between root CC and the RES (i.e. PCA axis 1) and, interestingly, slopes differed among symbiotic types, in response to the different role of each specific CC component. In addition, independently of symbiotic type, root CC decreased linearly with soil nutrient availability and quad-ratically with plant water availability.4. Synthesis. Our study demonstrates that woody plants display different functional strategies in their root CC, related with their position on the RES, and that CC differ among symbiotic groups. The influence of the root CC components across species varied among symbiotic associations, pointing to a trade-off between structural and metabolic compounds. Root CC were also strongly modulated by soil resource availability (nutrients and water). This study highlights that root CC are fundamental to better understand below- ground resource-use strategies.</abstract>
    <parentTitle language="eng">Journal of Ecology</parentTitle>
    <identifier type="doi">10.1111/1365-2745.13612</identifier>
    <identifier type="issn">1365-2745</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="Fprofil">3 Globaler Wandel und Transformationsprozesse / Global Change and Transformation Processes</enrichment>
    <author>
      <firstName>Enrique</firstName>
      <lastName>Garcia de la Riva</lastName>
    </author>
    <submitter>
      <firstName>Linda</firstName>
      <lastName>Wende</lastName>
    </submitter>
    <author>
      <firstName>Iván</firstName>
      <lastName>Prieto</lastName>
    </author>
    <author>
      <firstName>Teodoro</firstName>
      <lastName>Marañón</lastName>
    </author>
    <author>
      <firstName>Ignacio Manuel</firstName>
      <lastName>Pérez-Ramos</lastName>
    </author>
    <author>
      <firstName>Manuel</firstName>
      <lastName>Olmo</lastName>
    </author>
    <author>
      <firstName>Rafael</firstName>
      <lastName>Villar</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>below-ground strategies</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>functional traits</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>mycorrhiza</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>resource gradient</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>rhizobium</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>root carbon</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>soil nutrient</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>specific root length</value>
    </subject>
    <collection role="institutes" number="2407">FG Ökologie</collection>
  </doc>
  <doc>
    <id>28207</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>10</pageNumber>
    <edition/>
    <issue>12</issue>
    <volume/>
    <type>articler</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-12-20</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">The Economics Spectrum Drives Root Trait Strategies in Mediterranean Vegetation</title>
    <abstract language="eng">Extensive research efforts are devoted to understand fine root trait variation and to confirm the existence of a belowground root economics spectrum (RES) from acquisitive to conservative root strategies that is analogous to the leaf economics spectrum (LES). The economics spectrum implies a trade-off between maximizing resource acquisition and productivity or maximizing resource conservation and longevity; however, this theoretical framework still remains controversial for roots. We compiled a database of 320 Mediterranean woody and herbaceous species to critically assess if the classic economics spectrum theory can be broadly extended to roots. Fine roots displayed a wide diversity of forms and properties in Mediterranean vegetation, resulting in a multidimensional trait space. The main trend of variation in this multidimensional root space is analogous to the main axis of LES, while the second trend of variation is partially determined by an anatomical trade-off between tissue density and diameter. Specific root area (SRA) is the main trait explaining species distribution along the RES, regardless of the selected traits. We advocate for the need to unify and standardize the criteria and approaches used within the economics framework between leaves and roots, for the sake of theoretical consistency.</abstract>
    <parentTitle language="eng">Frontiers in Plant Science</parentTitle>
    <identifier type="doi">10.3389/fpls.2021.773118</identifier>
    <enrichment key="BTU">an der BTU erstellt / created at BTU</enrichment>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="opus.doi.autoCreate">false</enrichment>
    <enrichment key="opus.urn.autoCreate">false</enrichment>
    <enrichment key="Fprofil">3 Globaler Wandel und Transformationsprozesse / Global Change and Transformation Processes</enrichment>
    <author>
      <firstName>Enrique</firstName>
      <lastName>Garcia de la Riva</lastName>
    </author>
    <submitter>
      <firstName>Linda</firstName>
      <lastName>Wende</lastName>
    </submitter>
    <author>
      <firstName>José</firstName>
      <lastName>Ignacio Querejeta</lastName>
    </author>
    <author>
      <firstName>Rafael</firstName>
      <lastName>Villar</lastName>
    </author>
    <author>
      <firstName>Ignacio Manuel</firstName>
      <lastName>Pérez-Ramos</lastName>
    </author>
    <author>
      <firstName>Teodoro</firstName>
      <lastName>Marañón</lastName>
    </author>
    <author>
      <firstName>Javier</firstName>
      <lastName>Galán Díaz</lastName>
    </author>
    <author>
      <firstName>Sergio de</firstName>
      <lastName>Tomás Marín</lastName>
    </author>
    <author>
      <firstName>Iván</firstName>
      <lastName>Prieto</lastName>
    </author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ecophysiology</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>ine root strategies</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>non-mass normalized traits</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>root anatomy</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>root economic  spectrum</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>specific root area</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>specific root length</value>
    </subject>
    <collection role="institutes" number="2407">FG Ökologie</collection>
  </doc>
</export-example>
