Primary Productivity
Primary Productivity - Related Videos
01:06
Primary Production
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2025
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
09:12
Optimal Lentivirus Production and Cell Culture Conditions Necessary to Successfully Transduce Primary Human Bronchial Epithelial Cells
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Cited by 13 •
2016
Primary human bronchial epithelial cells are difficult to transduce. This protocol describes the production of lentiviruses and their concentration as well as the optimal culture conditions necessary to achieve highly efficient transductions in these cells throughout differentiation to a pseudostratified epithelium.
08:14
Using Primary Neurosphere Cultures to Study Primary Cilia
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Cited by 3 •
2017
The primary cilium is fundamentally important in neural progenitor cell proliferation, neuronal differentiation, and adult neuronal function. Here, we describe a method to study ciliogenesis and the trafficking of signaling proteins to cilia in neural stem/progenitor cells and differentiated neurons using primary neurosphere cultures.
06:02
A Low-Cost Method of Measuring the In Situ Primary Productivity of Periphyton Communities of Lentic Waters
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Cited by 1 •
2022
Presented here is a cost-effective and transportable method/facility for measuring the primary productivity of microbial mats under actual in situ environmental temperature and light conditions. The experimental setup is based on widely available materials and can be used under various conditions while offering the advantages of laboratory-based models.
10:00
Production and Use of Lentivirus to Selectively Transduce Primary Oligodendrocyte Precursor Cells for In Vitro Myelination Assays
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Cited by 2 •
2015
Here we present protocols that offer a flexible and strategic foundation for virally manipulating oligodendrocyte precursor cells to overexpress proteins of interest in order to specifically interrogate their role in oligodendrocytes via the in vitro model of central nervous system myelination.
FAQs
Gross primary productivity records all carbon fixed by autotrophs, while net primary productivity reflects the biomass left after autotrophic respiration. The distinction separates total carbon capture from the portion retained as new organic matter. Comparing both measures helps scientists interpret how much carbon an ecosystem processes and how much remains available for subsequent biological use.
Net primary productivity represents the organic matter remaining after autotrophic respiration, so it indicates the biomass that can support organisms at higher trophic levels. This makes it useful for tracing how energy enters and moves through food webs. Differences in net productivity also help compare the capacity of aquatic and terrestrial ecosystems to sustain biological communities.
Photosynthetic productivity depends on light-driven carbon fixation, whereas chemosynthetic microbes obtain energy by oxidizing inorganic compounds when light is unavailable. Both pathways support carbon fixation, but they rely on different energy sources. This distinction allows biological studies to recognize productivity in settings where photosynthesis cannot account for the formation of organic matter.
Primary productivity links inorganic carbon with organic matter by incorporating carbon dioxide into biomass or by using chemosynthetic pathways. The resulting organic material can move through food webs, while productivity measurements help trace carbon through ecosystems. Consequently, the concept connects biological activity at local sites with broader patterns of carbon movement across the global carbon cycle.
Scientists can compare gross and net productivity across aquatic and terrestrial environments to evaluate ecosystem function. Gross values describe total carbon fixation, whereas net values show the biomass remaining after autotrophic respiration. Using the same conceptual measures across habitats supports comparisons of how different ecosystems capture carbon and retain organic matter.
Productivity measurements provide evidence about how effectively an ecosystem converts inorganic carbon into organic matter and how much biomass remains after respiration. These results help scientists assess ecosystem function, compare habitats, and follow carbon as it enters food webs. They therefore connect organismal processes in plants, algae, and microbes with ecosystem-level biological patterns.