Antoinette M. Portelli, Saras M. Windecker, Laura J. Pollock, Will C. Neal, William K. Morris, Rohan Khot, Peter A. Vesk
{"title":"从马尾松到山白蜡,特定的叶面积与桉树的身材、重新萌发、茎干结构和果实大小相协调","authors":"Antoinette M. Portelli, Saras M. Windecker, Laura J. Pollock, Will C. Neal, William K. Morris, Rohan Khot, Peter A. Vesk","doi":"10.1071/bt23028","DOIUrl":null,"url":null,"abstract":"<strong> Context</strong><p>The radiation of eucalypts into almost every Australian environment offers valuable insights to plant ecological strategies.</p><strong> Aims</strong><p>We aimed to assess the degree to which functional traits across different organs are independent or reflect coordinated strategies in southern eucalypts.</p><strong> Methods</strong><p>We applied ordinary and phylogenetic generalised least squares regressions to 164 southern Australian taxa, examining the network of pairwise relationships between 10 functional traits representing aspects of stature, leaf economics, reproduction and post-fire regeneration. We examined coordination and modularity in this network and estimated how phylogeny affects observed trait correlations.</p><strong> Results</strong><p>Stem and stature traits were generally independent of reproductive traits, with Specific Leaf Area the most connected trait, being correlated with traits from all organs. Resprouting ability was also connected to several traits. Species able to resprout basally, but not epicormically, were on average shorter, stouter, with higher stem sapwood density, thinner bark, smaller leaves and lower Specific Leaf Area than those able to resprout using both methods. Taxa resembled their relatives; phylogenetic signal was significant for all continuous traits except Relative Height, ranging from Pagel’s Lambda <i>λ</i> = 0.37 (Relative Bark Thickness) to <i>λ</i> = 0.82 (Specific Leaf Area). Phylogenetic analyses showed weakened correlations for most (but not all) trait pairs. However, most moderate relationships on the trait correlation network also displayed correlated evolution.</p><strong> Conclusions</strong><p>Stature, stem, leaf and reproductive traits and fire response of eucalypts are somewhat coordinated, principally through leaf economics. Trait combinations that confer ecological competence on eucalypt taxa in present-day conditions are likely to have been similarly favoured throughout their evolutionary history.</p><strong> Implications</strong><p>This supports theory of coordinated plant strategies.</p>","PeriodicalId":8607,"journal":{"name":"Australian Journal of Botany","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"From mallees to mountain ash, specific leaf area is coordinated with eucalypt tree stature, resprouting, stem construction, and fruit size\",\"authors\":\"Antoinette M. Portelli, Saras M. Windecker, Laura J. Pollock, Will C. Neal, William K. Morris, Rohan Khot, Peter A. Vesk\",\"doi\":\"10.1071/bt23028\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<strong> Context</strong><p>The radiation of eucalypts into almost every Australian environment offers valuable insights to plant ecological strategies.</p><strong> Aims</strong><p>We aimed to assess the degree to which functional traits across different organs are independent or reflect coordinated strategies in southern eucalypts.</p><strong> Methods</strong><p>We applied ordinary and phylogenetic generalised least squares regressions to 164 southern Australian taxa, examining the network of pairwise relationships between 10 functional traits representing aspects of stature, leaf economics, reproduction and post-fire regeneration. We examined coordination and modularity in this network and estimated how phylogeny affects observed trait correlations.</p><strong> Results</strong><p>Stem and stature traits were generally independent of reproductive traits, with Specific Leaf Area the most connected trait, being correlated with traits from all organs. Resprouting ability was also connected to several traits. Species able to resprout basally, but not epicormically, were on average shorter, stouter, with higher stem sapwood density, thinner bark, smaller leaves and lower Specific Leaf Area than those able to resprout using both methods. Taxa resembled their relatives; phylogenetic signal was significant for all continuous traits except Relative Height, ranging from Pagel’s Lambda <i>λ</i> = 0.37 (Relative Bark Thickness) to <i>λ</i> = 0.82 (Specific Leaf Area). Phylogenetic analyses showed weakened correlations for most (but not all) trait pairs. However, most moderate relationships on the trait correlation network also displayed correlated evolution.</p><strong> Conclusions</strong><p>Stature, stem, leaf and reproductive traits and fire response of eucalypts are somewhat coordinated, principally through leaf economics. Trait combinations that confer ecological competence on eucalypt taxa in present-day conditions are likely to have been similarly favoured throughout their evolutionary history.</p><strong> Implications</strong><p>This supports theory of coordinated plant strategies.</p>\",\"PeriodicalId\":8607,\"journal\":{\"name\":\"Australian Journal of Botany\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2023-12-14\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Australian Journal of Botany\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1071/bt23028\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PLANT SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Australian Journal of Botany","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1071/bt23028","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PLANT SCIENCES","Score":null,"Total":0}
From mallees to mountain ash, specific leaf area is coordinated with eucalypt tree stature, resprouting, stem construction, and fruit size
Context
The radiation of eucalypts into almost every Australian environment offers valuable insights to plant ecological strategies.
Aims
We aimed to assess the degree to which functional traits across different organs are independent or reflect coordinated strategies in southern eucalypts.
Methods
We applied ordinary and phylogenetic generalised least squares regressions to 164 southern Australian taxa, examining the network of pairwise relationships between 10 functional traits representing aspects of stature, leaf economics, reproduction and post-fire regeneration. We examined coordination and modularity in this network and estimated how phylogeny affects observed trait correlations.
Results
Stem and stature traits were generally independent of reproductive traits, with Specific Leaf Area the most connected trait, being correlated with traits from all organs. Resprouting ability was also connected to several traits. Species able to resprout basally, but not epicormically, were on average shorter, stouter, with higher stem sapwood density, thinner bark, smaller leaves and lower Specific Leaf Area than those able to resprout using both methods. Taxa resembled their relatives; phylogenetic signal was significant for all continuous traits except Relative Height, ranging from Pagel’s Lambda λ = 0.37 (Relative Bark Thickness) to λ = 0.82 (Specific Leaf Area). Phylogenetic analyses showed weakened correlations for most (but not all) trait pairs. However, most moderate relationships on the trait correlation network also displayed correlated evolution.
Conclusions
Stature, stem, leaf and reproductive traits and fire response of eucalypts are somewhat coordinated, principally through leaf economics. Trait combinations that confer ecological competence on eucalypt taxa in present-day conditions are likely to have been similarly favoured throughout their evolutionary history.
Implications
This supports theory of coordinated plant strategies.
期刊介绍:
Australian Journal of Botany is an international journal for publication of original research in plant science. We seek papers of broad interest with relevance to Southern Hemisphere ecosystems. Our scope encompasses all approaches to understanding plant biology.
Australian Journal of Botany is published with the endorsement of the Commonwealth Scientific and Industrial Research Organisation (CSIRO) and the Australian Academy of Science.