Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

Inorganic Nitrogen Assimilation01:22

Inorganic Nitrogen Assimilation

894
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
894
The Nitrogen Cycle01:49

The Nitrogen Cycle

61.7K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
61.7K
Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

12.7K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
12.7K
Key Elements for Plant Nutrition02:35

Key Elements for Plant Nutrition

25.1K
Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...
25.1K
Responses to Drought and Flooding02:41

Responses to Drought and Flooding

12.5K
Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.
12.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Monitoring polycyclic aromatic hydrocarbons deposition in eastern Canada using moss biomonitoring: A large-scale study of spatial patterns and environmental influences.

The Science of the total environment·2026
Same author

Key factors influencing Hg levels and trends in unperturbed oligotrophic temperate and boreal lakes.

Environmental pollution (Barking, Essex : 1987)·2024
Same author

Non-use of combination HIV prevention tools and its determinants among men who have sex with men living in France.

Infectious diseases now·2022
Same author

Forest carbon sink neutralized by pervasive growth-lifespan trade-offs.

Nature communications·2020
Same author

Super-resolution radar imaging for breast cancer detection with microwaves: the integrated information selection criteria.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference·2020
Same author

Pseudoaneurysm following a freshwater stingray injury.

Journal of the European Academy of Dermatology and Venereology : JEADV·2019
Same journal

Unveiling the microhabitat puzzle: how spatial heterogeneity shapes cave invertebrate biodiversity across scales.

Oecologia·2026
Same journal

Soil microbial drought history affects physiological response of select tree species to drought stress.

Oecologia·2026
Same journal

Unveiling the effects of interspecific competition: ecological consequences of competitive release after damming on Salvelinus curilus populations in a three-salmonid species coexistence system.

Oecologia·2026
Same journal

Orchid bee diversity responds positively to forest cover and landscape heterogeneity in the Brazilian Savanna.

Oecologia·2026
Same journal

The impact of native vertebrates on enemy release and plant functional traits during community assembly.

Oecologia·2026
Same journal

Nutrient fluctuations alter effects of litter diversity of invasive species on native communities.

Oecologia·2026
See all related articles

Related Experiment Video

Updated: Apr 20, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

7.5K

Response of canopy nitrogen uptake to a rapid decrease in bulk nitrate deposition in two eastern Canadian boreal

D Houle1, C Marty, L Duchesne

  • 1Direction de la Recherche Forestière, Ministère des Ressources Naturelles, 2700 rue Einstein, Sainte-Foy, QC, G1P 3W8, Canada.

Oecologia
|November 20, 2014
PubMed
Summary
This summary is machine-generated.

Nitrate deposition has decreased significantly in eastern North America, impacting nitrogen canopy uptake (CU) in boreal forests. Ammonium is now a larger part of nitrogen deposition, altering forest canopy interactions.

More Related Videos

Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
10:29

Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers

Published on: March 21, 2016

13.0K
Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
08:44

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Published on: May 10, 2020

7.4K

Related Experiment Videos

Last Updated: Apr 20, 2026

Simulating Impacts of Ice Storms on Forest Ecosystems
06:27

Simulating Impacts of Ice Storms on Forest Ecosystems

Published on: June 30, 2020

7.5K
Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers
10:29

Calibrated Passive Sampling - Multi-plot Field Measurements of NH3 Emissions with a Combination of Dynamic Tube Method and Passive Samplers

Published on: March 21, 2016

13.0K
Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis
08:44

Microplot Design and Plant and Soil Sample Preparation for 15Nitrogen Analysis

Published on: May 10, 2020

7.4K

Area of Science:

  • Ecology
  • Environmental Science
  • Forestry

Background:

  • Recent studies indicate a rapid decline in nitrate (NO3-) deposition in eastern North America.
  • The impact of this trend on remote boreal forests with low nitrogen (N) deposition rates and their canopy uptake (CU) remains unclear.

Purpose of the Study:

  • To investigate trends in N deposition and inorganic N CU at two Quebec boreal forest sites between 1997/1999 and 2012.
  • To assess how changes in N deposition affect canopy interactions in different boreal forest types.

Main Methods:

  • Monitoring precipitation, throughfall N deposition, and inorganic N CU at two boreal sites.
  • Analyzing trends over a 13-15 year period, comparing sites with varied N deposition and tree species.

Main Results:

  • Nitrate (NO3-) bulk deposition decreased by approximately 50% at both sites.
  • Ammonium (NH4+) deposition showed no change, increasing its contribution to total inorganic N deposition to over 50%.
  • Canopy interception of N deposition ranged from 52-59%, with higher retention for NH4+ than NO3-.

Conclusions:

  • Decreasing NO3- deposition and a rising NH4+:NO3- ratio significantly impact N-canopy interactions.
  • Canopy uptake of NH4+ increased relative to total inorganic N CU, particularly at the site with lower N deposition.
  • Forest canopy N interactions are sensitive to changes in N deposition and forest composition.