Wood encodes environmental information that can be recovered through the study of tree-ring width and wood anatomical variables such as lumen area or cell-wall thickness. Anatomical often provide a stronger hydroclimate signal than width, but they show low tree-to-tree coherence. We investigate sources variation in area, thickness three pine species inhabiting sites with contrasting climate con...

We investigated the radial variation of sap flow within sapwood below the live crown in relation to tree size in 10-, 32-, 54- and 91-year-old maritime pine stands (Pinus pinaster Ait.). Radial variations were determined with two thermal dissipation sensors; one measured sap flux in the outer 20 mm of the xylem (Jref), whereas the other was moved radially across the sapwood in 20-mm increments ...

Ecologically extreme habitats at a species’ distribution edges bear significance for biota under adverse climatic conditions and climate change. Range-edge populations adjust their functional traits to the special local ecological conditions, leading increased intraspecific variability in morpho-anatomical structure and, consequently, favor population survival absence of competitors. On basis w...

------bitract: Minual and automated dendrometers, and thermal dissip and sap flow for loblolly pine (Pirzus taeda L.) trees attacked by southern pine beetle (Dendroctonus frorztalis Zirnm.) in east Tennessee, USA. Seasonal-long measurements with manual dendrometers indicated linear increases in stem circumference from April through June. Changes in stem circumference slowed after this time, and...

The bristlecone pine forests of western North America are notable for individual trees that attain great age and are used in the calibration of the radiocarbon timescale, and provide an element in millennial-scale reconstructions of temperature. But new research suggests that increasing temperature at high altitudes is fuelling a post-1950 growth spurt. Pines close to the treeline have wider an...

Manual and automated dendrometers, and thermal dissipation probes were used to measure stem increment and sap flow for loblolly pine (Pinus taeda L.) trees attacked by southern pine beetle (Dendroctonus frontalis Zimm.) in east Tennessee, USA. Seasonal-long measurements with manual dendrometers indicated linear increases in stem circumference from April through June. Changes in stem circumferen...

TreeWatch.net is an initiative that has been developed to watch trees grow and function in real-time. It is a water- and carbon-monitoring and modeling network, in which high-quality measurements of sap flow and stem diameter variation are collected on individual trees. Automated data processing using a cloud service enables instant visualization of water movement and radial stem growth. This c...

Studies on tree reaction after wounding were so far based on artificial wounding or chemical treatment. For the first time, type, spread and intensity of anatomical responses were analyzed and quantified in naturally disturbed Larix decidua Mill., Picea abies (L.) Karst. and Abies alba Mill. trees. The consequences of rockfall impacts on increment growth were assessed at the height of the wound...