The rate of diffusion of water vapor through the stomatal pores are not proportional to the area, with the holes (or area) of the edge length (total circumference) is proportional to a phenomenon known as the edge effect.
Translated by Google
Ecology
1, the concept of edge effects, features and mechanism 1.1 The concept of edge effect In two or ecosystem (or other systems) the nature of the interaction between two different place, due to some ecological factors (which may be material, energy, information, timing or geographical) differences or system attributes and synergies and reference in Some components of the system and cause behavior (such as population density, productivity and diversity) significant changes, called edge effect. Also known as peripheral effects. When the test field, even soil conditions are the same, but because of the space occupied in each different individual plants and test area and connected to the small differences in climate, and part of the central portion in the periphery of the crop plant height, grain number and aspects of pests or diseases, also will appear different, a phenomenon known as the edge effect. To remove this peripheral effect, may number as part of the outer edge of the field, in the handling of the test results will not be counted. 1.2 Characteristics of the edge effect: Edge effects with complex community structure, some species are particularly active, its productivity is relatively high; edge effects to strong competition began to end in harmony, so that the development of a variety of organisms from the fierce competition for the company as it could be, what they want from each other role in the formation of a multi-level, high-efficiency materials, energy symbiosis network. Edge effect has its stability, according to the nature of the edge effect can be divided into static and dynamic edge edge two kinds. Dynamic edge effect is mobile ecosystems edge, outside lasting material, energy inputs, such edge effects is relatively stable, long-term to maintain its high productivity; static edge is relatively static eco-edge, outside without stable substance, energy input Such edge effect is temporary, unstable. 1.3 Mechanism edge effects: Caused by edge effects strongly that additive effect, synergistic effect and skin effect edge effect. Bonus effect: any biological occupy a certain niche in the multi-dimensional ecological space. Synergistic effect: in the margins of various ecological factors and not just a simple additive effect, there is a non-additive relationships. Any species on the current level of use of the same kind of intensity and ecological factors related to other ecological factors. For a particular species, once they are in a heterogeneous environment with appropriate boundary ecological phase "resonance", you will have a strong synergistic effect between the various factors. Skin effect: fringe is more "stress" interaction zone, generally more each subsystem is more complex, heterogeneous and varied amount of information than the rich, and thus stimulate the information requirements for each subsystem and even high populations population to the edge of the area outside the system assembly, this is the skin effect. 2, edge effects and biodiversity The concept of plant-based edge effect is to increase the density of the biological variability between different plant communities and put forward, that is a different plant communities edge biological variation and density tends to increase. Edge effects for research and conservation of biological diversity has a specific value, in this particular habitats expect high biodiversity. The reason: In the back edge of new micro-environment, resulting in a high biodiversity; edge and biological sites offer more flavor and food sources, allowing the special needs of species dispersal and _set_tlement, thus contributing to different survival of the population quality, and enhance individual foraging populations and avoid natural disasters, allowing a higher biodiversity. 3, the use of edge effects, management and biodiversity conservation Intense human activity changed the natural landscape pattern, causing habitat fragmentation, loss and increase the number of edge habitat, biodiversity had a major impact. Enhance the use and management of the edge effect on the conservation of biological diversity has important significance. 4 Conclusion Edge effects and objective existence as a universal phenomenon, despite a lot of biologists concern in the past few decades, but compared with the research community more fully the internal biological diversity, about the edge effect on biodiversity research on the impact somewhat insignificant. Needs further exploration technology workers.
Translated by Google
Electrical aspects
Ideal plate capacitor electric field lines are straight, but in reality, in the bend near the edge of the place becomes, the more the more badly sidelined. To the edge of the most powerful, this bending phenomenon called edge effect. . .
Translated by Google
Geography edge effects
Because of regional distribution, composition of matter or energy flow structure uneven geographical variation caused by disturbance, enhancement, weakening a series of changes. It has a different scale and size, such as land and sea at the junction of the horizontal direction, desert and oasis at the junction; perpendicular direction - gas junction, the junction of the stratosphere and the turbulent layer; junction developed regional economic structure and underdeveloped areas, urban and rural junction ...... can reflect the different geographic edge effect intensity, size, and type of way. Study geography edge effect is to recognize geographic systems interact, mutual penetration of a window. From a macro sense entire geographical investigation, as long as there is a non-equilibrium, it will inevitably produce geographic gradients, gradient occurs most significant geographical space, the edge effect is geographically the most outstanding place. Clearly distinguish various types of energy flow and material flow through geographic boundaries, and with the energy flow and material flow within a relatively homogeneous within the boundaries of the space to compare the basic content is a measure of the geographical edge effects.
Translated by Google
Photography edge effects
Some distortion of the image density, its causes is the result of a partial flushing process, drug interactions, a phenomenon called edge effect. It is also called the neighborhood boundary effects (adjacency), or thick side effects (border). This effect is generated at the boundary of the two regions, the two regions received varying degrees of exposure, so when washing produce different levels of chemical activity. Typically, the edge effect is due to the burnout of the developer or inhibitory byproducts into an area to reduce the chemical activity generated. These two regions is more exposed an area within the edge of the developer increases, the density of the solid produced, which is called "McKee line." When McKee at a very narrow line in the common areas of the two edges of - or when this line around the inside edge of a small point - McKee combined to produce a line on the integrated density of this phenomenon called "Eberhard effect" (eberhard effect). Essentially the same between the two edges of the exposure of the developing regions to reduce this phenomenon is called "Kostin base effect." This phenomenon is manifested as a significant displacement between two images, or images of objects closely spaced position (e.g., parallel lines) becomes narrow.
Translated by Google
Planar chromatography
Planar chromatography, the chromatographic plate with a different location points on the baseline of the same material, and generating an edge shift value greater than the value of the intermediate ratio shift phenomenon because he edge of the solvent was evaporated faster than the middle, thereby accelerating the edge solvent migration, so that the edge shift value larger than he can come and ideas to reduce the sentence by chromatographic plate 1cm before the commencement of saturation.
Translated by Google
Botany
Hole diffusion efficiency is higher and edge effects related to the presence of holes. Diffusion rate of water vapor through the stomatal pores are not proportional to the area, with the holes (or area) of the edge length (total circumference) is proportional to this phenomenon called edge effect. In either evaporation surface, the evaporation surface in the center of the gas molecules, the molecules collide with each other and the interference between the slow diffusion of the atmosphere; evaporation surface at the edge of the gas molecules due to mutual interference and therefore less rapid diffusion. periphery of the water through the hole diffusion length is proportional to the amount and holes, and the holes in the area and disproportionate. hole smaller, the greater the ratio of perimeter and area, edge effect more remarkable, this is a small area of pores lost a lot of water can be an important reason.
Translated by Google
Wikipedia Encyclopedia
Edge Effects Radiation academic language. The density difference between the simulated images on photographs static structure to increase the edge boundaries distinct profile prominent phenomenon is one of the characteristics of the electrophotographic image. The ability to distinguish the effect that an edge of the image is improved. Formation mechanism of edge effects are: the electrostatic latent image, due to the potential difference, neighborhood community denser parts of the power line, so where the electric field enhancement. Since the developing soot adsorbed by the electric field intensity is based up the electrostatic attraction, and therefore, the latent image is developed neighboring contour portion appears sharp distinct boundary. general comparison of X-ray photography, due to the edge effect, electrostatic photography can enhance certain density similar lesions, such as minor fractures, non-metallic foreign bodies, such as the detection rate of breast lumps.
