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Towards understanding tree root profiles: simulating hydrologically optimal strategies for root distribution
forest hydrology optimisation roots
2009/3/24
In this modelling study differences in vertical root distributions measured in four contrasting forest locations in the Netherlands were investigated. Root distributions are seen as a reflection of th...
Use of the event tree to assess the risk reduction obtained from rockfall protection devices
event tree risk reduction rockfall protection devices
2010/1/4
The paper presents and discusses a procedure for the evaluation of the collective risk that can affect a road subjected to rockfalls, with and without protection measures, by means of the event tree a...
ESTIMATING CANOPY COVER FROM EUCALYPT DOMINANT TROPICAL SAVANNA USING THE EXTRACTION OF TREE CROWNS FROM VERY HIGH RESOLUTION IMAGERY.
canopy cover object-based image segmentation tree crowns northern Australia tropical savanna
2015/11/16
Very high spatial resolution satellite imagery provides data that enables spatially detailed analysis of landscapes. The identification
and extraction of information about tree crowns is one such us...
The effect of flooding on the exchange of the volatile C2-compounds ethanol,acetaldehyde and acetic acid between leaves of Amazonian floodplain tree species and the atmosphere
flooding exchange volatile C2-compounds ethanol acetaldehyde acetic acid Amazonian
2010/1/18
The effect of root inundation on the leaf emissions of ethanol, acetaldehyde and acetic acid in relation to assimilation and transpiration was investigated with 2–3 years old tree seedlings of four Am...
A bush, not a tree: The extraordinary diversity of cold-water basal foraminiferans extends to warm-water environments
A bush not a tree extraordinary diversity cold-water basal foraminiferans extends warm-water environments
2014/4/18
Foraminiferal species distribution and richness have traditionally been assessed through examination of the shells (tests) built by most of the described species, but molecular surveys indicate that t...
Tree-ring based reconstruction of the seasonal timing, major events and origin of rockfall on a case-study slope in the Swiss Alps
the seasonal timing major events origin of rockfall the Swiss Alps
2009/12/30
The intra-annual position of callus tissue and of tangential rows of traumatic resin ducts was determined in order to reconstruct the seasonality of past rockfall events. Results indicate strong intra...
Tree-ring analysis in natural hazards research – an overview
Tree-ring analysis natural hazards research
2009/12/30
The understanding of geomorphic processes and knowledge of past events are important tasks for the assessment of natural hazards. Tree rings have on varied occasions proved to be a reliable tool for t...
鸡解偶联蛋白(UCP)基因内含子的克隆与系统发生树的构建Cloning and Sequencing of the Introns of UCP Gene and Construction of Molecular Phylogenetic Tree in Chicken
鸡 解偶联蛋白基因 分子系统发生树
2008/1/10
摘要 解偶联蛋白基因是新近发现的能够增加能量的消耗，与脂肪代谢和能量调控密切相关的一组基因。本研究根据小鼠UCP2基因的剪切方式，设计4对引物成功克隆测序了鸡UCP基因的全部5个内含子，发现都是GT-AG类型的内含子，鸡UCP基因的结构和小鼠的UCP2基因结构一致。以不同物种UCP基因的cds 区域序列和内含子2、内含子3序列进行系统发生树的构建，结果表明：以UCP基因cds区域序列构建的系统发生...
On the Eigenvalue Two and Matching Number of a Tree
Tree Laplacian eigenvalues matching number
2007/12/11
In [6], Guo and Tan have shown that $2$ is a Laplacianeigenvalue of any tree with perfect matchings. For trees withoutperfect matchings, we study whether $2$ is one of its Laplacianeigenvalues. If th...
Allowed Parameter Regions for a Tree-Level Inflation Model
inflation
parameter region large-scale structure COBE power normalization
spectral index tree-level model
2007/8/15
2001Vol.35No.1pp.125-128DOI:
Allowed Parameter Regions for a Tree-Level Inflation Model
MENG Xin-He
National Astronomical Observatory, The Chinese Academy of Sciences, B...
A RELATION BETWEEN THE MATCHING NUMBER AND LAPLACIAN SPECTRUM OF A TREE
Tree Laplacian spectrum matching numbe
2007/8/7
Let $T$ be a tree with matching number $\mu(T)$. In this paper we obtain thefollowing result: If $T$ has no perfect matchings, then $\mu(T)$ is a lower bound forthe number of nonzero Laplacian eigenva...
In this paper, we use the virtual system method to estimate the parametersin a system tree and obtain a series of asymptotically efficient estimates of the interesting parameters. Section 1 is an intr...
Let T(G) be the tree graph of a simple graph G. It is proved that if T and T′are two vertices of T(G) such that d_T(G)(T)\le d_T(G}(T′), then there ared_T(G)(T) internally disjoint paths in T(G) joini...
Effects of Dimethoate on Tree Frog (Hyla arborea) Larvae
Acute toxicity organophosphorus pesticides dimethoate Amphibia Hyla arborea anuran larvae
2010/3/26
Considering the global decline of amphibian populations, the present study aimed to investigate the sensitivity of tree frogs to a common pesticide, dimethoate. Our study reports the effects of dimeth...
Seasonal Variations in Tannin Profile of Tree Leaves
Tannin Profile Tree Leaves Seasonal Variation Semi-hilly Arid Region
2016/4/21
Forest tree leaves (12 different species) of semi hilly arid region of Punjab State were collected at 30-day interval throughout the year to assess the seasonal variations in tannin profile. Tannins w...