Related Experiment Video
Updated: May 27, 2026
09:31
Preparation of Authigenic Pyrite from Methane-bearing Sediments for In Situ Sulfur Isotope Analysis Using SIMS
Published on: August 31, 2017
Sulfur isotopic composition of mangroves
1a Forestry and Forest Products Research Institute, Tsukuba Norin Kenkyu Danchi-nai , Ibaraki , Japan.
Isotopes in Environmental and Health Studies
|November 18, 2011
Summary
Mangrove species show unique sulfur isotope ratios, with Rhizophora and Bruguiera exhibiting significant light isotope enrichment. This suggests specialized sulfur uptake adaptations in their complex root systems for anaerobic environments.
Area of Science:
- Environmental Science
- Isotope Geochemistry
- Plant Biology
Background:
- Mangrove ecosystems are vital coastal habitats.
- Sulfur cycling plays a crucial role in plant physiology and soil biogeochemistry.
- Understanding species-specific nutrient uptake is key to mangrove ecology.
Purpose of the Study:
- To investigate species-specific sulfur (S) isotope fractionation in mangrove leaves.
- To explore the relationship between sulfur assimilation and mangrove root system morphology.
- To identify adaptations in sulfur uptake related to anaerobic soil conditions.
Main Methods:
- Analysis of sulfur isotope ratios (δ(34)S) in leaves of 19 mangrove species.
- Comparison of isotopic signatures across different genera, focusing on Rhizophora and Bruguiera.
- Correlation of isotopic data with known root system characteristics.
Main Results:
- Significant variation in sulfur isotope ratios (δ(34)S) was observed among mangrove species.
- Rhizophora and Bruguiera consistently displayed negative δ(34)S values, indicating light isotope enrichment.
- These species possess complex root systems potentially linked to enhanced sulfur absorption.
Conclusions:
- Mangrove species exhibit distinct sulfur assimilation pathways.
- The observed light isotope enrichment in Rhizophora and Bruguiera suggests specialized adaptations for sulfur uptake in anaerobic soils.
- Elaborated root systems may facilitate efficient sulfur acquisition under challenging environmental conditions.
More Related Videos
Related Concept Videos
01:29Microbes and the Sulfur Cycle
Sulfur is a vital element in Earth's biogeochemical systems. It transitions through various inorganic states, including sulfate (SO₄²⁻), elemental sulfur (S⁰), and sulfide (S²⁻). Abiotic and biological mechanisms across oxic and anoxic environments intricately mediate these transformations. Sulfate, the most oxidized form of sulfur, is predominantly stored in rocks, marine sediments, and oceanic waters, acting as a long-term reservoir in the global sulfur cycle.In oxic environments,...
01:20Sulfur Assimilation
Sulfur is an essential element in biological systems, contributing to synthesizing key biomolecules, including amino acids such as cysteine and methionine, and cofactors such as coenzyme A and biotin. Microorganisms primarily assimilate sulfur as sulfate (SO₄²⁻) from the environment, which must undergo a series of biochemical transformations before it can be incorporated into cellular components. As sulfate is highly oxidized, it must undergo assimilatory sulfate reduction to become...
01:22The Sulfur Cycle
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
01:13Mass Spectrometry: Isotope Effect
Most elements exist in nature as a mixture of isotopes. The isotopes differ in weight due to their respective number of neutrons. The molecular weight of a molecule is different depending on the specific isotope of its elements involved. As a result, the mass spectrum of the molecule exhibits peaks from the same fragment at multiple positions. The positions of these mass signals depend on the mass differences between isotopes. Furthermore, the intensity of these signals is dependent on the...
02:17Structure and Nomenclature of Thiols and Sulfides
Thiols and sulfides are sulfur analogs of alcohols and ethers, respectively, where the sulfur atom takes the place of the oxygen atom. Thus, thiols are generally represented as RSH, where R is an alkyl substituent and —SH is the functional group. On the other hand, in sulfides, the central sulfur atom is bonded to two hydrocarbon groups on either side. Depending upon the type of group, sulfides can be either symmetrical or asymmetrical. Both thiols and sulfides display a bent geometry, similar...
01:25Microbial Mats
Microbial communities forming biofilms and mats represent complex, spatially structured ecosystems where metabolic processes are stratified according to light, oxygen, and nutrient gradients. Biofilms are initial colonization stages, only a few millimeters thick, while mature microbial mats can reach centimeter-scale thickness and display intricate vertical organization. Their structural and functional heterogeneity allows microorganisms to occupy distinct ecological niches within a few...