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Related Concept Videos

Production Efficiency01:01

Production Efficiency

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Net production efficiency (NPE) is the efficiency at which organisms assimilate energy into biomass for the next trophic level. Due to low metabolic rates and less energy spent on thermoregulatory processes, the NPE of ectotherms (cold-blooded animals) is 10 times higher than endotherms (warm-blooded animals).
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Primary Production01:06

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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.
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Trophic Efficiency00:46

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Trophic level transfer efficiency (TLTE) is a measure of the total energy transfer from one trophic level to the next. Due to extensive energy loss as metabolic heat, an average of only 10% of the original energy obtained is passed on to the next level. This pattern of energy loss severely limits the possible number of trophic levels in a food chain.
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Overview
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Ecological Succession02:17

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Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
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Ecological Niches02:02

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All organisms have a position within an ecosystem. The complete set of living and nonliving factors—including food resources, climate, and terrain—that define the position of a given organism are collectively referred to as the organism’s ecological niche.
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JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
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Using ecological production functions to link ecological processes to ecosystem services.

Randall Jf Bruins1, Timothy J Canfield2, Clifford Duke3

  • 1US Environmental Protection Agency, National Exposure Research Laboratory, Ecological Exposure Research Division, Cincinnati, Ohio.

Integrated Environmental Assessment and Management
|August 20, 2016
PubMed
Summary

Ecological production functions (EPFs) can improve environmental management by modeling ecosystem services (ES). Enhancing EPFs with key attributes and data is crucial for ecological risk assessment and decision-making.

Keywords:
Decision makingEcological modelFinal ecosystem servicesPesticidesStressors

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Area of Science:

  • Environmental science
  • Ecosystem modeling
  • Risk assessment

Background:

  • Ecological production functions (EPFs) are crucial for linking ecosystems, stressors, and management to ecosystem services (ES) production.
  • Despite their importance in environmental management, EPFs have been underutilized in ecological risk assessment.
  • EPFs are defined as models representing ecosystem processes that produce ES, often influenced by external factors.

Purpose of the Study:

  • To identify key attributes of effective EPFs for decision-making.
  • To explore the application of EPFs in ecological risk assessment, particularly for services like pesticide regulation.
  • To highlight challenges and advocate for improvements in EPF development and application.

Main Methods:

  • Identification of essential EPF attributes for decision-making, focusing on quantifying final ES outcomes.
  • Discussion of actual and idealized EPF examples to inform environmental management.
  • Illustrative example of pesticide risk assessment using EPFs to incorporate ES.

Main Results:

  • EPFs are most useful when they quantify ES outcomes, respond to ecosystem conditions and stressors, and reflect ecological complexity.
  • Ideal EPFs should be practical, transparent, data-rich, and have a proven track record.
  • Challenges include limited adaptable datasets and poor understanding of ecological process linkages.

Conclusions:

  • EPFs with specific attributes can integrate ES into ecological risk assessment.
  • Advocacy for increased ecological complexity and trade-off representation within EPFs.
  • Further research and data are needed to overcome limitations in EPF development and application.