Examples of net primary productivity in the following topics:
-
- Productivity, measured by gross and net primary productivity, is defined as the amount of energy that is incorporated into a biomass.
- Because all organisms need to use some of this energy for their own functions (such as respiration and resulting metabolic heat loss), scientists often refer to the net primary productivity of an ecosystem.
- Net primary productivity is the energy that remains in the primary producers after accounting for the organisms' respiration and heat loss.
- The net productivity is then available to the primary consumers at the next trophic level.
- Explain the concept of primary production and distinguish between gross primary production and net primary production
-
- Temperature and moisture are important influences on plant production (primary productivity) and the amount of organic matter available as food (net primary productivity).
- Net primary productivity is an estimation of all of the organic matter available as food.
- In terrestrial environments, net primary productivity is estimated by measuring the aboveground biomass per unit area, which is the total mass of living plants, excluding roots.
- Net primary productivity is an important variable when considering differences in biomes.
- Environments with the greatest amount of biomass have conditions in which photosynthesis, plant growth, and the resulting net primary productivity are optimized.
-
- The net primary productivity of boreal forests is lower than that of temperate forests and tropical wet forests.
- There is little species diversity, low net primary productivity, and low aboveground biomass.
-
- Because of the dormant period, the net primary productivity of temperate forests is less than that of tropical wet forests.
-
- Natural habitats are often destroyed through human activity for the purpose of harvesting natural resources for industry production and urbanization.
- Habitat destruction is currently ranked as the primary cause of species extinction worldwide.
- The forests are being removed for their timber, and to clear space for plantations of palm oil, an oil used in Europe for many items including food products, cosmetics, and biodiesel.
- This begins with the appropriation of about 38 percent of the earth's land surface and about 20 percent of its net primary productivity.
- Sustainability is a concept that describes how biological systems remain diverse and productive over time.
-
- Tropical wet forests have high net primary productivity because the annual temperatures and precipitation values in these areas are ideal for plant growth.
-
- $TLTE=\frac { production\quad at\quad present\quad trophic\quad level }{ production\quad at\quad previous\quad trophic\quad level } x100$
- Another main parameter that is important in characterizing energy flow within an ecosystem is the net production efficiency.
- Net production efficiency (NPE) allows ecologists to quantify how efficiently organisms of a particular trophic level incorporate the energy they receive into biomass.
- Net consumer productivity is the energy content available to the organisms of the next trophic level.
- For example, the opossum shrimp eats both primary producers and primary consumers.
-
- This process illustrates oxygenic photosynthesis, wherein the first electron donor is water and oxygen is created as a waste product.
- The net-reaction of all light-dependent reactions in oxygenic photosynthesis is: 2H2O + 2NADP+ + 3ADP + 3Pi → O2 + 2NADPH + 3ATP
- The net result is a low pH in the thylakoid lumen and a high pH in the stroma.
- The light excites an electron from the chlorophyll a pair, which passes to the primary electron acceptor.
- In (a) photosystem II, the electron comes from the splitting of water, which releases oxygen as a waste product.
-
- As mentioned above, sustained overharvesting is one of the primary threats to biodiversity.
- A significant proportion of drugs and medicines are natural products which are derived, directly or indirectly, from biological sources.
-
- The protists themselves and their products of photosynthesis are essential, directly or indirectly, to the survival of organisms ranging from bacteria to mammals .
- As primary producers, protists feed a large proportion of the world's aquatic species.
- (On land, terrestrial plants serve as primary producers. ) In fact, approximately one-quarter of the world's photosynthesis is conducted by protists, particularly dinoflagellates, diatoms, and multicellular algae.