22 papers · ranked by Valyu relevance
Franco Biondi, David Meko, Gianluca Piovesan
The public-domain International Tree-Ring Data Bank (ITRDB) is an under-utilized dataset to improve existing estimates of global tree longevity. Since dendrochronologists have usually targeted the oldest trees in a stand, this public-domain resource is bound to offer better estimates of maximum tree age than those…
Tommaso Jucker, Fabian Jörg Fischer, Jérôme Chave, David A. Coomes + 116 more
'John Caspersen' 'Arshad Ali' 'Grace Jopaul Loubota Panzou' 'Ted R. Feldpausch' 'Daniel Falster' 'Vladimir A. Usoltsev' 'Toby D. Jackson' 'Stephen Adu-Bredu' 'Luciana F. Alves' 'Mohammad Aminpour' 'Bhely Angoboy Ilondea' 'Niels P. R. Anten' 'Cécile Antin' 'Yousef Askari' 'Narayanan Ayyappan' 'Lindsay F. Banin' 'Nicolas…
T. Jackson, A. Shenkin, N. Majalap, J. bin Jami + 9 more
The factors that limit the maximum height of trees, whether ecophysiological or mechanical, are the subject of longstanding debate. Here we examine the role of mechanical stability in limiting tree height and focus on trees from the tallest tropical forests on Earth, in Sabah, Malaysian Borneo, including the recently…
Tommaso Jucker, Fabian Jörg Fischer, Jérôme Chave, David A. Coomes + 115 more
'John Caspersen' 'Arshad Ali' 'Grace Jopaul Loubota Panzou' 'Ted R. Feldpausch' 'Daniel Falster' 'Vladimir A. Usoltsev' 'Stephen Adu‐Bredu' 'Luciana F. Alves' 'Mohammad Aminpour' 'Ilondea B. Angoboy' 'Niels P. R. Anten' 'Cécile Antin' 'Yousef Askari' 'Rodrigo Muñoz' 'Narayanan Ayyappan' 'Patricia Balvanera' 'Lindsay…
Robert T. Leverett, David N. Ruskin, Susan A. Masino
Accurate measurement of tree volume and associated carbon storage are necessary to determine ongoing sequestration as well as site productivity and changes in growth of individual tree species. Standard statistical methods vary their estimations of tree volume, and thus carbon storage and sequestration, particularly in…
Matthew R Evans, Aristides Moustakas, Gregory Carey, Yadvinder Malhi + 4 more
'Nathalie Butt' 'Sue Benham' 'Denise Pallett' 'Stefanie Schäfer'] As part of a project to develop predictive ecosystem models of United Kingdom woodlands we have collated data from two United Kingdom woodlands - Wytham Woods and Alice Holt. Here we present data from 582 individual trees of eight taxa in the form of…
G. Alemán-Sancheschúlz, M. E. Olson, J. A. Rosell, I. H. Salgado-Ugarte + 1 more
Leaf cell size distributions failed to show key signatures of the turgor limitation of tree height; instead, it is more likely that natural selection favors the cell sizes plants display. The turgor limitation hypothesis (TLH) predicts that reduced turgor caused by gravity and hydraulic resistance at the treetop makes…
Natacha Savine, Thomas Cordonnier, Gauthier Ligot, Patrick Vallet
Tree height is a key variable for assessing forest functioning and resources (e.g volume, carbon stocks) at both tree and stand levels. However, direct field measurements are costly and time-consuming. Developing accurate and unbiased height-diameter allometries applicable over large spatial scales is therefore crucial…
Natacha Savine, Thomas Cordonnier, Gauthier Ligot, Patrick Vallet
Tree height is a key variable for assessing forest functioning and resources (e.g volume, carbon stocks) at both tree and stand levels. However, direct field measurements are costly and time-consuming. Developing accurate and unbiased height-diameter allometries applicable over large spatial scales is therefore crucial…
Dipanjan Majumdar, Giulio Vita, Rubina Ramponi, Nina Glover + 1 more
'Maarten van Reeuwijk'] - The drag properties of trees are determined by a single drag length ℓd = (aCV d ) −1 where a is the leaf-area density and C V d is the volumetric drag coefficient. - Field and wind-tunnel measurements with real vegetation find the median drag length to be 21 m for trees and 0.7 m for low…
Iain Martyn, Mike Steel
In molecular systematics, evolutionary trees are reconstructed from sequences at the tips under simple models of site substitution. A central question is how much sequence data is required to reconstruct a tree accurately? The answer depends on the lengths of the branches (edges) of the tree, with very short and very…
Roel J. W. Brienen, Giuliano Maselli Locosselli, Stefan Krottenthaler, Emanuel Gloor + 41 more
Tree longevity is thought to increase in growth-limiting, adverse environments, but a quantitative assessment of drivers of global variation in tree longevity is lacking. We assemble a global database of maximum longevity for 739 tree species and analyse associations between longevity and climate, soil, and species’…
Chih-Hsin Cheng, Pei-Chen Lee, Hong-Rue Lee, Chiou-Pin Chen + 1 more
'Oleg V. Menyailo'] Dendrometer bands have been proposed as an accurate method for measuring tree growth. However, the constrained observation window and the material used in them hamper long-term tree growth monitoring. This study devised a dendrometer band made from stainless steel and primarily extended the…
Andrew M. Goldsborough, J. M. Fellows, Matthew Bates, S. Alex Rautu + 2 more
'George Rowlands' 'Rudolf A. Römer'] Abstract. We study the average leaf-to-leaf path lengths on ordered Catalan tree graphs with n nodes and show that these are equivalent to the average length of paths starting from the root node. We give an explicit analytic formula for the average leafto-leaf path length as a…
Giovanni Bicego, Mark E Olson, David S Gernandt, Tommaso Anfodillo
To analyse the broadest possible range of needle lengths in conifers, we chose the genus Pinus, one of the most species-rich conifer genera and the one exhibiting the widest variation in leaf length, from less than 1 cm to nearly 50 cm (; ). We sampled Pinus species in Mexico, which is the richest centre of…
Tuija Aronen
The shortening of telomeres, the specific structures of repeated DNA sequence at the end of the eukaryotic chromosomes, has been connected with ageing and loss of cell replication or regeneration capacity. There is, however, only limited information available on telomeres of long-living trees. Physiological ageing, on…
Authors not listed
We present a simple yet efficient random (brute-force) algorithm for constructing solvated molecular systems. By placing solvent molecules at random positions and orientations within a simulation box, we circumvent the complexities typically associated with more sophisticated packing algorithms. The main computational…
Amirmohammad Farzaneh, Mihai-Alin Badiu, Justin P. Coon
—Measuring the complexity of tree structures can be beneficial in areas that use tree data structures for storage, communication, and processing purposes. This complexity can then be used to compress tree data structures to their informationtheoretic limit. Additionally, the lack of models for random generation of…
Manojlović, Veselin, Ahmed, Armaan + 4 more
Although the analysis of rooted tree shape has wide-ranging applications, notions of tree balance have developed independently in different domains. In computer science, a balanced tree is one that enables efficient updating and retrieval of data, whereas in biology tree balance quantifies bias in evolutionary…
Yanfang Wang, Wei Liang, Liheng Zhong, Xizi Yu + 2 more
- 1. MOE Key Laboratory of Western China's Environmental System, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou, Gansu 730000, China - 2. Ant Group, World Financial Center, Beijing 100020, China - 3. School of Geographical Sciences, Hebei Normal University, Shijiazhuang 050024, China - 4.…
Authors not listed
RNA molecules fold into complex three-dimensional structures that determine their function. A wide range of mathematical frameworks, such as chord diagrams, fatgraphs, and context-free grammars, have been used to represent these structures; however, these models have largely been developed from mathematical motivations…
Bohdan Konôpka, Jozef Pajtík, Vladimír Šebeň, Katarína Merganičová + 1 more
'Frank M. Thomas'] Considering the surface of individual tree compartments, it is obvious that the main portion of bark, i.e., the largest area and the greatest bulk mass, is located on the stem. We focused on basic bark properties, specifically thickness, surface area, biomass, and specific surface mass (expressed as…