منابع مشابه
Hydraulic conductance, light interception and needle nutrient
determined in Scots pine (Pinus sylvestris L.) trees and stands from 7 to about 60 years of age. At the stand scale, leaf area index and net primary productivity (NPP, aboveplus belowground) increased and reached a plateau at about 25--30 and 15--20 years, respectively; both parameters declined in mature stands. Stand hydraulic conductance followed a similar trend to NPP, with a maximum at abou...
متن کاملA method for estimating light interception by a conifer shoot.
We present an operational method for estimating the amount of PAR intercepted by a coniferous shoot. Interception of PAR by a shoot is divided into three components: the amount of radiation coming from the sky, the transmission of radiation through the surrounding vegetation, and the shoot' s silhouette area facing the direction of the incoming radiation. All three components usually vary with ...
متن کاملShoot structure, light interception, and distribution of nitro
ture and needle morphology on the distributions of light and nitrogen within a Pacific silver fir (Abies amabilis (Dougl.) Forbes) canopy. Specifically, we investigated the role of morphological shade acclimation in the determination of resource use efficiency, which is claimed to be optimal when the distribution of nitrogen within the canopy is directly proportional to the distribution of inte...
متن کاملMultiscale Framework for Modeling and Analyzing Light Interception by Trees
This paper presents a new framework for modeling light interception by isolated trees which makes it possible to analyze the in uence of structural tree organization on light capture. The framework is based on a multiscale representation of the plant organization. Tree architecture is decomposed into a collection of components representing clusters of leaves at di erent scales in the tree crown...
متن کاملInterception Patterns
Developing applications that support evolution in a seamless way is not an easy task; in an early design stage, some concepts may be confused or some potential functionality not foreseen, resulting in bad separations of concerns. In this kind of designs, future changes may imply huge modifications if a highquality object-oriented model is the desired product. In theory, object oriented programm...
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ژورنال
عنوان ژورنال: Science
سال: 2011
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.333.6049.1551-a