Zoning

(noun)

Land use planning utilized by local governments, derived from the practice of designating permitted uses of land based on mapped zones which separate one set of land uses from another. Zoning may be use-based (regulating the uses to which land may be put), or it may regulate building height, lot coverage, and similar characteristics, or some combination of these.

Related Terms

Examples of Zoning in the following topics:

  • Types of Root Systems and Zones of Growth

    • The root tip has three main zones: a zone of cell division, a zone of elongation, and a zone of maturation.
    • The root tip can be divided into three zones: a zone of cell division, a zone of elongation, and a zone of maturation .
    • All three zones are in approximately the first centimeter of the root tip.
    • A longitudinal view of the root reveals the zones of cell division, elongation, and maturation.
    • Describe the three zones of the root tip and summarize the role of each zone in root growth

  • Growth of Bone

    • The zone of maturation and hypertrophy contains chondrocytes that are older and larger than those in the proliferative zone .
    • The zone of calcified matrix, the zone closest to the diaphysis, contains chondrocytes that are dead because the matrix around them has calcified .
    • After the zone of calcified matrix, there is the zone of ossification, which is actually part of the metaphysis .
    • The topmost layer of the epiphysis is the reserve zone.
    • The second zone, the proliferative zone, is where chondrocytes are continually undergoing mitosis.

  • Meristems

    • Apical meristems are organized into four zones: (1) the central zone, (2) the peripheral zone, (3) the medullary meristem and (3) the medullary tissue .
    • Surrounding the central zone is the peripheral zone.
    • The rate of cell division in the peripheral zone is higher than that of the central zone.
    • Each zone of the apical meristem has a particular function.
    • Pictured here are the (1) central zone, (2) peripheral zone, (3) medullary meristem and (3) medullary tissue.

  • Marine Biomes

    • Each zone has a distinct group of species adapted to the biotic and abiotic conditions particular to that zone.
    • This zone is an extremely variable environment because of tides.
    • The neritic zone extends from the intertidal zone to depths of about 200 m (or 650 ft) at the edge of the continental shelf.
    • Beyond the neritic zone is the open ocean area known as the oceanic zone.
    • There are a variety of invertebrates and fishes found in this zone, but the abyssal zone does not have plants due to the lack of light.

  • The Phosphorus Cycle

    • This process is responsible for dead zones in lakes and at the mouths of many major rivers .
    • These zones can be caused by eutrophication, oil spills, dumping of toxic chemicals, and other human activities.
    • The number of dead zones has been increasing for several years; more than 400 of these zones were present as of 2008.
    • One of the worst dead zones is off the coast of the United States in the Gulf of Mexico, where fertilizer runoff from the Mississippi River basin has created a dead zone of over 8,463 square miles.
    • Worldwide, large dead zones are found in coastal areas of high population density.

  • The Deep Sea and Barophilism

    • Zones of the deep sea include the mesopelagic zone, the bathyal zone, the abyssal zone, and the hadal zone.

  • Kirby-Bauer Disk Susceptibility Test

    • A larger zone of inhibition around an antibiotic-containing disk indicates that the bacteria are more sensitive to the antibiotic in the disk.
    • KB tests are performed under standardized conditions and standard-sized zones of inhibition have been established for each antibiotic.
    • KB test results are usually reported as sensitive, intermediate, or resistant, based on the size of the zone of inhibition.
    • If the observed zone of inhibition is greater than or equal to the size of the standard zone, the microorganism is considered to be sensitive to the antibiotic.
    • Conversely, if the observed zone of inhibition is smaller than the standard size, the microorganism is considered to be resistant.

  • Abiotic Factors Influencing Aquatic Biomes

    • The ocean is categorized by several areas or zones .
    • All of the ocean's open water is referred to as the pelagic realm (or zone).
    • The benthic realm (or zone) extends along the ocean bottom from the shoreline to the deepest parts of the ocean floor.
    • At depths greater than 200 m, light cannot penetrate; thus, this is referred to as the aphotic zone.
    • The ocean is divided into different zones based on water depth, light availability, and distance from the shoreline.

  • Hybrid Zones

    • An area where two closely-related species continue to interact and reproduce, forming hybrids, is called a hybrid zone.
    • Over time, the hybrid zone may change depending on the fitness strength and the reproductive barriers of the hybrids .
    • For a hybrid zone to be stable, the offspring produced by the hybrids have to be less fit than members of the parent species.
    • After speciation has occurred, the two separate-but-closely-related species may continue to produce offspring in an area called the hybrid zone.
    • Discuss how the fitness of a hybrid will lead to changes in the hybrid zone over time

  • Geographic Pricing

    • Zone pricing: Prices increase as shipping distances increase.
    • This is sometimes done by drawing concentric circles on a map with the plant or warehouse at the center and each circle defining the boundary of a price zone.
    • (The term "zone pricing" can also refer to the practice of setting prices that reflect local competitive conditions (i.e., the market forces of supply and demand, rather than actual cost of transportation).
    • Many business people and economists state that gasoline zone pricing merely reflects the costs of doing business in a complex and volatile marketplace.
    • Zone pricing is also used to price fares in certain metro stations.