The rate at which organic matter is produced in an ecosystem is its
Productivity: Productivity is the amount of organic matter made by photosynthesizing (and/or sometimes chemosynthesizing) organisms in an ecosystem. In photosynthesizing organisms (e.g., plants, algae, and some bacteria) light energy from the Sun is converted into chemical energy and stored as organic matter, for example, in plants as wood, leaves, and roots. Chemosynthesizers use chemical reactions, often in the absence of light, to produce organic matter. Animals that eat photosynthesizing organisms (called herbivores), and animals that eat other animals (carnivores), get their energy for growth, reproduction, and other functions from their food through the process of cellular respiration, where the ingested food is converted to ATP. Show Terrestrial plant productivity in February (top) and July (bottom) 2015 as measured from space by a NASA satellite. Notice the shift in productivity with the change in seasons from the southern to the northern hemisphere. Source: NASA Biomass is the mass of all living organisms in an ecosystem, or the mass of one or more species in an ecosystem, at a particular time. Productivity and biomass in ecosystems are affected by many Earth system processes and phenomena, including:
Humans have altered productivity and biomass in ecosystems through a variety of activities, including:
Can you think of additional cause and effect relationships between biomass and productivity and other parts of the Earth system? Visit the evolution, species interactions, and species population pages to explore more connections between the biosphere and global changes. InvestigateLearn more in these real-world examples, and challenge yourself to construct a model that explains the Earth system relationships. What is the rate of production of organic matter?So, secondary productivity is the rate of production of organic matter by consumers.
What is the organic material in an ecosystem called?Biomass: The total amount of organic matter present in an ecosystem is called Biomass. The word organic matter refers to food that comes from living organisms such as plants and animals.
Which is the rate of production of organic matter by consumers?The rate at which food energy is assimilated at the trophic level of consumers is called secondary productivity. In other words, the rate of synthesis of organic matter by consumers is called as secondary productivity.
What is production of organic matter?First, organic matter has to be synthesized by living organisms and thereafter it must be deposited and preserved in sediments. Depending on further geological events, part of the sedimentary organic matter may be transformed into petroleum-like compounds.
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