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@Article{VinyaMaBrFiBrAr:2018:EvWaCo,
               author = "Vinya, Royd and Malhi, Yadvinder and Brown, Nick D. and Fisher, 
                         Joshua B. and Brodribb, Timothy and Arag{\~a}o, Luiz Eduardo 
                         Oliveira e Cruz de",
          affiliation = "{Oxford University Centre for the Environment} and {Oxford 
                         University Centre for the Environment} and {University of Oxford} 
                         and {University of Tasmania} and {Jet Propulsion Laboratory} and 
                         {Instituto Nacional de Pesquisas Espaciais (INPE)}",
                title = "Seasonal changes in plant–water relations influence patterns of 
                         leaf display in Miombo woodlands: evidence of water conservative 
                         strategies",
              journal = "Tree-Physiology",
                 year = "2018",
               volume = "0",
                pages = "1--9",
             keywords = "hydraulic conductivity, leaf phenology, Miombo woodlands, 
                         plant–water relations, xylem safety margin.",
             abstract = "Water availability has frequently been linked to seasonal leaf 
                         display in seasonally dry ecosystems, but there have been few 
                         ecohydrological investigations of this link. Miombo woodland is a 
                         dominant seasonally dry tropical forest ecosystem type in southern 
                         Africa; however, there are few data on the relationship between 
                         seasonal dynamics in plantwater relations and patterns of leaf 
                         display for Miombo woodland. Here we investigate this relationship 
                         among nine key Miombo woodland tree species differing in drought 
                         tolerance ability and leaf phenology. Results of this study showed 
                         that seasonal patterns of leaf phenology varied significantly with 
                         seasonal changes in stem water relations among the nine species. 
                         Leaf shedding coincided with the attainment of seasonal minimum 
                         stem water potential. Leaf flush occurred following xylem 
                         rehydration at the peak of the dry season suggesting that 
                         endogenous plant factors play a pivotal role in seasonal leaf 
                         display in this forest type. Drought-tolerant deciduous species 
                         suffered significantly higher seasonal losses in xylem hydraulic 
                         conductivity than the drought-intolerant semi-evergreen tree 
                         species (P < 0.05). There was a significant and positive 
                         correlation between species drought tolerance index and species 
                         seasonal loss in hydraulic conductivity (P < 0.05), confirming the 
                         ecological role of long-distance xylem transport in this 
                         seasonally dry tropical forest. Our results reveal that water 
                         stress in seasonally dry tropical forests selects for water 
                         conservative traits that protect the vulnerable xylem transport 
                         system. Therefore, seasonal rhythms in xylem transport dictate 
                         patterns of leaf display in seasonally dry tropical forests.",
                  doi = "10.1093/treephys/tpy062",
                  url = "http://dx.doi.org/10.1093/treephys/tpy062",
                 issn = "0829-318X",
             language = "en",
           targetfile = "vinya_seasnal.pdf",
        urlaccessdate = "04 dez. 2020"
}


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