Grazing Impacts on Wetland Plant Communities
Summary
Grazing by domestic and wild herbivores is a pervasive driver of vegetation dynamics in wetlands worldwide. The removal of above-ground biomass by cattle, sheep, geese or other grazers can suppress dominant species, reduce litter accumulation and create microsites for seedling establishment, thereby influencing both species richness and community composition. Conversely, intensive or poorly timed grazing may lead to soil compaction, altered nutrient cycling and loss of sensitive obligate wetland taxa. In many temperate fens and floodplain meadows, moderate grazing maintains open-canopy conditions and high forb diversity, whereas long-term exclusion often results in tall-sedge thickets or woody encroachment. In tropical and subtropical marshes, seasonal grazing interacts with hydroperiod to determine recruitment windows for annuals and perennials. Understanding these interactions is central to reconciling agricultural use with conservation goals. Adaptive management of grazing regimes—adjusting stocking density, timing and grazer assemblage—offers practical pathways to sustain both productive use and the ecological integrity of wetland plant communities.
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Grazing Impacts on Wetland Plant Communities publication trend
The graph below shows the total number of articles in grazing impacts on wetland plant communities across all publications each year (not limited to Nature Index journals).
Technical terms
Grazing intensity: measure of herbivore pressure on vegetation, often expressed as the number of animals per unit area over time.
Hydroperiod: duration and timing of water coverage in wetlands, crucial for determining plant life cycles and species distribution.
Obligate wetland species: plants that require saturated soil conditions for establishment and reproduction.
Exclosure: fenced area designed to prevent entry of grazing animals, used to assess grazing effects.
Woody encroachment: colonisation of grass- or forb-dominated wetlands by shrubs and trees, often following grazing exclusion.
References
- Assessing the success of hydrological restoration in two conservation easements within Central Florida ranchland. PLOS ONE (2018).
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