Regional chronologies of Cedrela fissilis and Cedrela angustifolia in three forest types and their relation to climate

Paredes-Villanueva, Kathelyn; López, Lidio; Cerrillo, Rafael María Navarro

doi:10.1007/s00468-016-1391-8

Cited by 32 publications

(17 citation statements)

References 51 publications

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“…In the Meliaceae family, Noldt et al (2001) found that some species were more sensitive to environmental conditions due to root systems in the upper soil layers. The Cedrela samples in our study also showed superficial tree roots and site-specific growth variation (Paredes-Villanueva et al, 2016) which indicates that these trees display site-specific characteristics that may have played an important role in wood formation. Such site characteristics vary from large scale, e.g.…”

Section: Discussionsupporting

confidence: 58%

Chemical differentiation of Bolivian Cedrela species as a tool to trace illegal timber trade

Paredes-Villanueva

Espinoza

Ottenburghs

et al. 2018

Forestry: An International Journal of Forest Research

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Combating illegal timber trade requires the ability to identify species and verify geographic origin of timber. Forensic techniques that independently verify the declared species and geographic origin are needed, as current legality procedures are based on certificates and documents that can be falsified. Timber from the genus Cedrela is among the most economically valued tropical timbers worldwide. Three Cedrela species are included in the Appendix III of CITES: C. fissilis, C. odorata, and C. angustifolia (listed as C. lilloi). Cedrela timber is currently traded with false origin declarations and under a different species name, but tools to verify this are lacking. We used Direct Analysis in Real Time Time-of-Flight Mass Spectrometry (DART-TOFMS) to chemically identify Cedrela species and sites of origin. Heartwood samples from six Cedrela species (the three CITES-listed species plus C. balansae, C. montana, and C. saltensis) were collected at 11 sites throughout Bolivia. Mass spectra detected by DART-TOFMS comprised 1062 compounds; their relative intensities were analysed using Principal Component Analyses (PCA), Kernel Discriminant Analysis (KDA), and Random Forest analyses to check discrimination potential among species and sites. Species were identified with a mean discrimination error of 15-19%, with substantial variation in discrimination accuracy among species. The lowest error was observed in C. fissilis (Mean=4.4%). Site discrimination error was considerably higher: 43-54% for C. fissilis and 42-48% for C. odorata. These results provide good prospects to differentiate C. fissilis from other species, but at present there is no scope to do so for other tested species. Thus, discrimination is highly species specific. Our findings for tests of geographic origin suggest no potential to discriminate at the studied scale and for the studied species. Cross-checking results from different methods (KDA and Random Forest) reduced discrimination errors. In all, the DART-TOFMS technique allows independent verification of claimed identity of certain Cedrela species in timber trade.

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Section: Discussionsupporting

confidence: 58%

Chemical differentiation of Bolivian Cedrela species as a tool to trace illegal timber trade

Paredes-Villanueva

Espinoza

Ottenburghs

et al. 2018

Forestry: An International Journal of Forest Research

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“…Overall, tree-ring chronologies of Cedrela from AFSM shows high inter-series correlations (r mean = 0.48), and mean expressed population signal >0.85, statistical elements that indicate a good performance of our tree ring chronologies for dendroclimatic studies . These correlation between trees were higher than any other attained in prior studies with Cedrela r<0.28 (Dunisch et al 2003;Paredes-Villanueva et al 2016), but lower than observed by with r = 0.57, so series intercorrelation in Cedrela chronologies has great variability and depends on the number of samples used for its building. CB population had the lowest intercorrelation series, a fact that be the reason of the weaker climatic (mainly precipitation) signal contained in this chronology (Table 2).…”

Section: Discussioncontrasting

confidence: 52%

Tree growth response to climate change in two threatened South American Biomes: Brazilian Atlantic Forest and Chilean Mediterranean Forest

Venegas‐González¹,

Danilo²

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Tree growth response to climate change in two threatened South American Biomes: Brazilian Atlantic Forest and Chilean Mediterranean Forest Biomes classified as Brazilian Atlantic Forest (BAF) and the Chilean Mediterranean forest (CMF) have been affected by anthropic pressure that has caused a considerable decrease of their forest surfasse. However, they are rich in biodiversity and they provide many ecosystem services and were, therefore, classified as "hotspots" (forests in risk). Therefore, is essential to study the natural dynamics and the climatic response of the trees of these forests to include conservation projects and strategic measures. To achieve these objectives, the scientific literature reports that tree growth rings are the only ecological indicators with annual resolution that can be efficient and highly accurate to obtain this information. In this context, the research project has as main objective the retrospective analysis of radial growth of forest species in different vegetation communities of BAF and CMF in response to climatic changes. To achieve this goal, four key questions were elaborated: 1) Which variable explains betterthe variability of radial growth at different spatial and temporal scales? 2) What is the growth resilience to recent climate changes? 3) Is there some more vulnerable population to expected climatic changes?. A total of five sites (seven populations) of Cedrela odorata and C. fissilis in BAF from the State of São Paulo in Brazil, and five sites (10 populations) of Nothofagus macrocarpa (FMC) from the central region of Chile were sampled, using a non-destructive method. Four chapters were developed to answer these questions. Chapter I seek to analyze the resilience in radial growth to changes in regional climate variability and droughts, in temporal and spatial scale, on Atlantic forest remnant forests of biogeographic region Serra do Mar. Results show that radial growth in wet sites (winter rains exceed 240 mm) depend on the moisture conditions in dry season, while the higher population is more sensitive to the favorable summer water condition, which would be explained because this population received a lower temperature than the other Cedrela spp. populations studied. Chapter II analyzed how recent climatic variability affected the radial growth in N. macrocarpa populations. It is observed that all the populations are closely linked to the precipitations of May-November (end of autumn/end of spring) and average temperature of October-December (mid-spring/early summer). In Chapter III, we continued exploring the growth responses to climate in the FMC populations in order to find biogeographic differences. In this sense, we evaluated if this significant decrease in tree growth is differentiated between populations and age classes, and determine if the positive effect of CO2 fertilization compensates the precipitation decrease and temperature increase in the last decades in the growth of older, maturer and younger trees. Results show a significant negative trend in all cl...

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“…Although it is suggested by Wigley et al (1984) that the EPS is adequate if higher than 0.85, this parameter can be adjusted depending on the ecological characteristics of the species analyzed (Piraino et al, 2015). Difficulties in crossdating process of C. fissilis, like wood anatomical anomalies, inconspicuous rings and false or local missing rings, were also found by other authors that studied this species (Andreacci et al, 2014;Paredes-Villanueva et al, 2016;López & Villalba 2016;Cusatis et al, 2013).…”

Section: Discussionmentioning

confidence: 88%

Climatic Response of Cedrela fissilis Radial Growth in the Ombrophilous Mixed Forest, Paraná, Brazil

et al. 2019

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We examined the climatic response of Cedrela fissilis radial growth based on precipitation, air relative humidity, temperature and monthly thermal amplitude. It was intended to assess how the secondary growth of C. fissilis is influenced by the climatic variables and which one are the best growth predictors in Ombrophilous Mixed Forest, southern Brazil. Wood cores were processed using classical dendrochronology methodology. Principal Components Analysis, Generalized Linear Models and correlation were used to explore the relationship between radial growth and climate. Our results indicated that the best radial growth predictor is the temperature: the seasonal behavior, under well-watered conditions, seems to have a dominant effect on growth responses. Changes in tree growth corresponding to an increase in temperatures suggest a sensitivity of the species to climate changes. These results are important to help understand how the global warming may influence long-lived pioneer tree growth.

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Regional chronologies of Cedrela fissilis and Cedrela angustifolia in three forest types and their relation to climate

Cited by 32 publications

References 51 publications

Chemical differentiation of Bolivian Cedrela species as a tool to trace illegal timber trade

Chemical differentiation of Bolivian Cedrela species as a tool to trace illegal timber trade

Tree growth response to climate change in two threatened South American Biomes: Brazilian Atlantic Forest and Chilean Mediterranean Forest

Climatic Response of Cedrela fissilis Radial Growth in the Ombrophilous Mixed Forest, Paraná, Brazil

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