ecological pyramid

(noun)

diagram that shows the relative amounts of energy or matter or numbers of organisms within each trophic level in a food chain or food web

Examples of ecological pyramid in the following topics:

  • Ecological Pyramids

    • Ecological pyramids, which can be inverted or upright, depict biomass, energy, and the number of organisms in each trophic level.
    • Ecological pyramids show the relative amounts of various parameters (such as number of organisms, energy, and biomass) across trophic levels.
    • Ecological pyramids can also be called trophic pyramids or energy pyramids.
    • All types of ecological pyramids are useful for characterizing ecosystem structure.
    • Ecological pyramids depict the (a) biomass, (b) number of organisms, and (c) energy in each trophic level.

  • Basic Types of Organizations

    • Most organizations fall into one of four types: pyramids/hierarchies, committees/juries, matrix organizations, and ecologies.
    • Most organizational structures fall into one of four types: pyramids/hierarchies, committees/juries, matrix organizations, and ecologies.
    • An organization using a pyramid or hierarchy structure has a leader who is responsible for and makes all the decisions affecting the organization.
    • In ecologies, each business unit represents an individual profit center that holds employees accountable for the unit's profitability.
    • In an ecology organization, clearly defined, measurable objectives that reflect the business's goals are critical.

  • The Pyramids of the Old Kingdom

    • These tombs were built in the form of great pyramids, and for this reason, the Old Kingdom is frequently referred to as "the Age of the Pyramids. "
    • In the following dynasties, the pyramid design changed from the "step" pyramid to a true pyramid shape as kings continued to build tombs for their kings.
    • The Necropolis includes three pyramid complexes: the Great Pyramid (built by King Khufu of the 4th Dynasty); the somewhat smaller Pyramid of Khafre (Khufu's son); and the relatively modest-sized Pyramid of Menkaure .
    • Djoser´s step pyramid was the first of the great pyramids built during the Old Kingdom in Eqypt.
    • This view shows all three pyramid structures: the Great Pyramid, the Pyramid of Khafre, and the Pyramid of Menkaure.

  • Introduction to Ecology

    • Within the discipline of ecology, researchers work at four specific levels, sometimes discretely and sometimes with overlap.
    • There are many practical applications of ecology in conservation biology, wetland management, natural resource management (agroecology, agriculture, forestry, agroforestry, fisheries), city planning (urban ecology), community health, economics, basic and applied science, and human social interaction (human ecology).
    • There are also many subcategories of ecology, such as ecosystem ecology, animal ecology, and plant ecology, which look at the differences and similarities of various plants in various climates and habitats.
    • In addition, physiological ecology, or ecophysiology, studies the responses of the individual organism to the environment, while population ecology looks at the similarities and dissimilarities of populations and how they replace each other over time.
    • Finally, it is important to note that ecology is not synonymous with environment, environmentalism, natural history, or environmental science.

  • The Old Kingdom

    • The Old Kingdom is perhaps best known for a large number of pyramids, which were constructed as royal burial places, and is often called "The Age of the Pyramids."
    • Using a greater mass of stones than any other king, he built three pyramids: Meidum, the Bent Pyramid and the Red Pyramid.
    • Sneferu was succeeded by his (in)famous son, Khufu (2589-2566 BCE), who built the Great Pyramid of Giza.
    • After Khufu's death one of his sons built the second pyramid and the Sphinx in Giza.
    • The Great Pyramid of Giza was built c. 2560 BCE by Khufu during the Fourth Dynasty.

  • Egyptian Monuments

    • Ancient Egyptian monuments included pyramids, sphinxes and temples.
    • About 135 pyramids have been discovered in Egypt, with the largest (in Egypt and the world) being the Great Pyramid of Giza.
    • The Giza Necropolis, built in the Fourth Dynasty, includes the Pyramid of Khufu (also known as the Great Pyramid or the Pyramid of Cheops), the Pyramid of Khafre and the Pyramid of Menkaure, along with smaller "queens" pyramids and the Great Sphinx.
    • Here the Great Sphinx is shown against the Pyramid of Kahfre.
    • A map showing the layout of the Giza Pyramid area, including the Pyramids of Khufu, Khafre, Menkaure and the Great Sphinx.

  • The Nazca

    • These pyramid-like structures and plazas, situated in the  lower part of the Nazca Valley, served as important spaces for fertility and agricultural rituals.
    • These trees play an extremely important role as an ecological keystone of this landscape, in particular, preventing river and wind erosion.

  • Negative and positive effects of globalization for developing country business

    • With regard to the environment, international trade and foreign direct investment can provide less industrialized countries with the incentive to adopt, and the access to, new technologies that may be more ecologically sound (World Bank Briefing Paper, 2001).
    • The fortune at the bottom of the pyramid (Prahalad and Stuart)

  • Tombs

    • During the Old Kingdom, mastabas and pyramids were built as tombs for the deceased in order to preserve their soul in the afterlife.
    • During the Old Kingdom, these royal mastabas eventually developed into rock-cut "step pyramids" and then "true pyramids," although non-royal use of mastabas continued to be used for more than a thousand years.
    • The Pyramids of Giza, massive stone-cut structures built from limestone quarried from the Nile River,are the most well-known example of pyramid tombs built during the Old Kingdom .
    • As the pyramids were constructed for the kings, mastabas for lesser royals were constructed around them.
    • The Pyramids of Giza served as tombs to the Kings.

  • Organization of Motor Neuron Pathways

    • It consists of the pyramidal and extrapyramidal system.
    • The motor impulses originate in the giant pyramidal cells (Betz cells) of the motor area, i.e., precentral gyrus of the cerebral cortex.
    • Cortical upper motor neurons originate from Brodmann areas 1, 2, 3, 4, and 6, then descend into the posterior limb of the internal capsule, through the crus cerebri, down through the pons, and to the medullary pyramids, where about 90% of the axons cross to the contralateral side at the decussation of the pyramids.
    • Included in the diagram are the following motor pathways: corticospinal tracts (pyramidal tract), and extrapyramidal tracts (tectospinal tract not delineated).
    • Lateral view; "pyramidal tract" visible in red, and "pyramidal decussation" labeled at lower right.