Related Experiment Video
Updated: Jun 4, 2026
08:08
Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance
Published on: August 18, 2023
Intraspecific traits change biodiversity effects on ecosystem functioning under metal stress
Isabel Fernandes1, Cláudia Pascoal, Fernanda Cássio
1Centre of Molecular and Environmental Biology (CBMA), Department of Biology, University of Minho, Braga, Portugal.
Oecologia
|February 23, 2011
Summary
Biodiversity loss impacts ecosystem functioning. This study shows trait diversity, not just species number, is key for fungal decomposers, especially under metal stress, highlighting intraspecific diversity importance.
Area of Science:
- Ecology
- Environmental Science
- Microbiology
Background:
- Biodiversity loss impacts ecosystem functioning, but consensus is lacking on which biodiversity measure is most explanatory.
- Key aspects like mechanisms and environmental context modulation of biodiversity effects require further investigation.
- Aquatic fungal decomposers play a crucial role in nutrient cycling and decomposition processes.
Purpose of the Study:
- To investigate how species number and traits of aquatic fungal decomposers influence fungal production and plant litter decomposition.
- To examine the mechanisms behind biodiversity effects, including species complementarity and dominance.
- To assess how environmental context, specifically metal stress, modulates these biodiversity effects.
Main Methods:
- Manipulated species number (1-3) and traits of aquatic fungal decomposers.
- Assessed fungal production (biomass accumulation) and plant litter decomposition.
- Used real-time PCR to quantify the contribution of individual species in multispecies assemblages.
- Exposed fungal assemblages to both metal-stressed and unpolluted conditions.
Main Results:
- In the absence of metal stress, increased species number led to positive diversity effects on fungal production and decomposition due to species complementarity.
- Metal stress reduced diversity effects on decomposition in assemblages with fungi from unpolluted sites, likely due to competition.
- Dominance effects preserved positive diversity effects under metal stress in assemblages with fungi from metal-polluted sites.
- Intraspecific diversity modulated biodiversity effects under metal stress.
Conclusions:
- Species traits and intraspecific diversity are critical for understanding biodiversity effects on ecosystem functioning, particularly under environmental stress.
- Trait-based diversity measures are essential for accurate assessment of biodiversity impacts.
- Fungal communities from polluted environments may exhibit enhanced resilience and maintain ecosystem functions under stress.
Related Concept Videos
01:24Microbes and Other Elemental Cycles
Microbial activity plays a pivotal role in the biogeochemical cycling of iron and manganese, especially at the redox gradients characteristic of stratified aquatic environments. These cycles are driven by microbial transformations between oxidized and reduced forms of the metals, allowing organisms to exploit them for metabolic energy and structural purposes.Iron Cycling Across Redox GradientsIn neutral, oxygen-rich surface waters, iron is predominantly found in its oxidized, insoluble ferric...
01:28Introduction to Microbial Ecology
Microbial ecology examines the complex web of interactions and diversity among microorganisms within various ecosystems. This field seeks to understand how microbial populations adapt to and influence their environments and how these interactions shape broader ecological processes. Microbes are integral to ecosystem function, participating in nutrient cycling, energy flow, and the maintenance of environmental homeostasis.An ecosystem represents a dynamic interaction between living organisms...
01:24Evolution of New Traits in Microbes
Microorganisms evolve rapidly due to their large population sizes and short generation times, often exhibiting measurable changes within days under laboratory conditions. Natural selection acts on standing genetic variation, enabling the retention and amplification of beneficial traits that confer fitness advantages in changing environments.Adaptive Pigment Regulation in RhodobacterIn Rhodobacter, a genus of purple non-sulfur bacteria, light-harvesting pigments such as bacteriochlorophyll and...
01:24Microbial Corrosion
Microbiologically Influenced Corrosion (MIC) is a significant form of material degradation caused by the metabolic activities of microorganisms. This phenomenon poses substantial challenges across various industries, including oil and gas, maritime, and water treatment sectors.MIC occurs when microorganisms, such as bacteria, archaea, and fungi, colonize metal surfaces, forming biofilms that alter the local electrochemical environment. These biofilms can lead to the production of corrosive...
02:26Ecological Disturbance
An ecological disturbance is a temporary disruption in the environment resulting from abiotic, biotic, or anthropogenic factors, causing a pronounced change in an ecosystem. The impact of an ecological disturbance, which can depend on its intensity, frequency, and spatial distribution, plays a significant role in shaping the species diversity within the ecosystem.Ecological disturbances can be caused by an event as small as the trampling of underbrush to an incident as wide-ranging as a forest...
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...