Related Experiment Video
Updated: Jul 17, 2026
09:23
JenaTron - An Experimental Approach to Study the Effects of Plant History and Soil History on Grassland Ecosystem Functioning
Published on: March 21, 2025
Species interactions reverse grassland responses to changing climate.
K B Suttle1, Meredith A Thomsen, Mary E Power
1Department of Integrative Biology, University of California, Berkeley, CA 94720, USA. kbsuttle@socrates.berkeley.edu
Science (New York, N.Y.)
|February 3, 2007
Summary
Climate change impacts on ecosystems are complex. Species interactions, not just direct climate effects, significantly alter ecological responses and food web dynamics over time.
Area of Science:
- Ecology
- Climate Change Biology
- Ecosystem Dynamics
Background:
- Ecological predictions often focus on direct climatic impacts on species.
- The role of species interactions in mediating climate change effects is understudied.
Purpose of the Study:
- To investigate how species interactions influence grassland community responses to altered rainfall patterns.
- To assess the interplay between direct climatic effects and biotic interactions under simulated climate change.
Main Methods:
- Experimental manipulation of rainfall seasonality and intensity in California grasslands.
- Monitoring of responses across multiple trophic levels over five years.
- Utilizing large, replicated plots aligned with climate model projections.
Main Results:
- Initial increases in production and diversity were observed under altered rainfall.
- Sustained changes led to species interactions overriding direct water effects.
- Food web simplification and reduced consumer abundance occurred after five years.
Conclusions:
- Species interactions are critical drivers of ecosystem response to climate change.
- Biotic feedbacks can reverse initial community trajectories predicted by direct climatic effects.
- Understanding species interactions is essential for accurate ecological forecasting.
Related Concept Videos
02:39Predator-Prey Interactions
Predators consume prey for energy. Predators that acquire prey and prey that avoid predation both increase their chances of survival and reproduction (i.e., fitness). Routine predator-prey interactions elicit mutual adaptations that improve predator offenses, such as claws, teeth, and speed, as well as prey defenses, including crypsis, aposematism, and mimicry. Thus, predator-prey interactions resemble an evolutionary arms race.Although predation is commonly associated with carnivory, for...
02:17Ecological Succession
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...
02:45Responses to Heat and Cold Stress
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
01:57Adaptations that Reduce Water Loss
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
01:32What is Natural Selection?
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.The Theory of Natural...
01:50Threats to Biodiversity
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...