Productivity refers to the rate of biomass generation in an ecosystem, expressed in units of mass per volume per unit of time. It can relate to dry matter or the mass of generated carbon. In ecology, productivity is influenced by factors such as net primary productivity (NPP), which is the total amount of energy converted from solar energy to chemical energy with the subtraction of energy used for respiration.
Tree and phylogenetic diversity typically increase with productivity in forests, while relationships shift from unimodal to declining in grasslands. Biomes usually cross national boundaries, such as the Sahara, tundra, and tropical rainforests. Wetlands are among the most productive ecosystems in the world, comparable to rain forests and coral reefs. A biome is an area classified according to the species that live in that location, and climate range, soil type, and light and water are unique to a particular place.
Relative productivity is extremely high due to year-round photosynthesis, stable temperature, and precipitation. Biomass is concentrated in woody areas. The Amazon rainforest of South America is the largest rainforest biome in the world, with low relative productivity due to no inputs that help the biome. The tricellular model explains the distribution of precipitation and temperature and how they influence structure and relative productivity of different biomes.
Net primary productivity ranges from 400–600 g m-2 yr-1, but varies depending on local conditions such as soil depth. Decomposition is rapid and year-round, and in early stages of succession, gross productivity is low due to unfavourable initial conditions and low density of producers. The proportion of energy lost in early stages of succession is also affected by the relative productivity of tropical rainforests, deserts, tundra, and other biomes.
📹 Topic 2.4 Biomes, Zonation, and Succession
Slides from https://mrkremerscience.com/ess/ecosystems/2-4-biomes-zonation-and-succession/
Which biome has the lowest productivity?
The tundra biome has the lowest primary productivity due to its extreme temperature conditions, limited plant life, and short growing seasons. Primary productivity is the rate at which plants and photosynthetic organisms produce organic compounds in an ecosystem, measured in grams of organic material per square meter per year. Areas with a greater abundance of photosynthetic organisms generally have higher primary productivity levels. The tundra biome is the most suitable for understanding primary productivity, as it provides a comprehensive understanding of the ecosystem’s productivity.
What is relative productivity?
Relative productivity is defined as the rate at which a company or country produces goods. This is typically determined by the number of people employed and the necessary materials required.
What is the relative productivity of the temperate forest?
The gross primary productivity of temperate forests is estimated to be between 16 and 50 metric tons per hectare per year, while the net primary productivity is approximately 10 metric tons per hectare per year. This represents the highest productivity among young forests, but it is lower than that observed in tropical rainforests and net primary productivity. This suggests that the temperate forest ecosystem exhibits a lower diversity of consumers.
What is productivity in relation to biomes?
Biome productivity can be defined as the quantity of living plant material produced through photosynthesis, which represents the primary source of biomass.
How do you calculate relative productivity?
The labor productivity equation can be used to measure employee productivity. For example, if a company generates $80, 000 worth of goods or services with 1, 500 labor hours, the labor productivity can be calculated as 53, or $53 per hour of work. Alternatively, if the number of employees is used instead of hours, the labor productivity can be calculated as 2, 666, meaning each employee contributes $2, 666 per week. This helps in understanding the overall productivity of the company.
What is relative efficiency?
Relative Efficiency is a measure used in DEA models to compare unit efficiency by calculating their efficiency scores relative to each other. Super-efficiency models enhance this measure for better discrimination between efficient units. This site uses cookies and is copyrighted by Elsevier B. V., its licensors, and contributors. All rights are reserved for text and data mining, AI training, and similar technologies, with Creative Commons licensing terms for open access content.
What is the primary productivity of a biome?
The high primary productivity observed in a biome is linked to the presence of abundant vegetation. This productivity is influenced by a number of factors, including the optimal temperature, the availability of nutrients, the amount of sunlight, and the quantity of water present. These factors distinguish this type of biome from those with lower or medium productivity.
What biome is high productivity?
Tropical forests have the highest biodiversity and primary productivity among terrestrial biomes, with net primary productivity ranging from 2-3 kg m-2 y-1 or higher. Terrestrial biomes are distinguished by their predominant vegetation, which is mainly determined by temperature and rainfall. Plant life forms are classified based on traits that vary with climate, such as the location of the perennating organ. These tissues give rise to new growth the following season and are sensitive to climatic conditions.
The relative proportions of different life forms vary with climate, and life form spectra are more alike in similar climates on different continents than they are in different climates on the same continent. Regions of similar climate and dominant plant types are called biomes. Major terrestrial biomes include tropical forests, savannas, deserts, temperate grasslands, temperate deciduous forests, Mediterranean scrub, coniferous forests, and tundra.
What is the relative productivity of the tundra?
The Arctic tundra has some of the lowest net primary productivity of any ecosystem due to its cold and short growing season, infertile soils, and the cold and short growing season. The mean productivity ranges from 10-400 g m-2 yr-1, with a mean of 140 g m-2 yr-1. Understanding the distribution of ecosystem types and factors determining plant and animal survival is crucial. The Arctic tundra is one of the newest communities or ecosystems in the world, having only been covered over by glaciers a few thousand years ago.
After the last glaciation (the Wisconsin) ended, stony, infertile soils were left behind, allowing the soils to undergo less weathering than temperate or tropical areas. Many of the soils lack a discernible profile and are often very acidic (pH around 3. 5). This course aims primarily at terrestrial systems, with some digressions into aquatic systems.
Which 3 biomes have the highest productivity?
Ecosystem productivity is defined as the rate at which primary producers, such as plants, utilize sunlight. Tropical rainforests, estuaries, swamps, and marshes are characterized by the highest productivity due to the favorable conditions for photosynthesis and biomass production.
What is relative productivity in biomes?
The area exhibits high relative productivity and high fauna diversity as a consequence of the large number of producers and extensive food webs, which include numerous grazing animals.
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