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Black hammock farm'S

Katahdin Sheep Wetlands Management Study

Why This Study Matters

Florida faces a critical challenge in wetland management as invasive species threaten ecosystem integrity across the state. The South Florida Water Management District identifies approximately 200 introduced plant and animal species established in the region, with 66 non-native plant species designated as priorities for control. Current management strategies rely heavily on mechanical removal, prescribed burns, and herbicide applications—methods that are expensive, labor-intensive, and may have unintended ecological consequences.

Simultaneously, livestock grazing in wetland environments remains controversial and understudied, particularly in subtropical climates. While extensive research documents livestock impacts on wetlands, the vast majority focuses on cattle in temperate regions. Research on sheep grazing in subtropical wetlands, specifically using parasite-resistant hair sheep breeds, remains critically limited.

1579 Walsh Street Oviedo,

Florida 32765

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The Participants: The Innovation of Using Katahdin Sheep In WetLAND MANAGEMENT

Katahdin sheep represent a unique opportunity for Florida wetland management due to their specific biological adaptations:

Parasite Resistance: Research demonstrates that Katahdin sheep possess significantly higher parasite resistance than conventional wool breeds. Studies conducted at Virginia Tech and Arkansas showed Katahdin sheep had fecal egg counts 45% lower than Dorper crosses and required substantially less anthelmintic treatment than wool breeds. Their Caribbean hair sheep ancestry provides genetic resistance evolved in hot, humid, high-parasite environments—precisely the conditions present in Florida wetlands.

Climate Adaptation: Katahdin sheep demonstrate well-developed heat tolerance in tropical and subtropical regions. Their hair coat (rather than wool) allows superior thermoregulation in humid conditions where wool breeds experience heat stress. University of Florida research identifies Katahdin as one of six meat breeds demonstrating ability to naturally minimize parasite burdens in Florida conditions.

Selective Grazing Behavior: Sheep exhibit different grazing patterns than cattle. Research indicates sheep nibble grass close to the ground and selectively consume flowers and certain vegetation types. This selective grazing could target specific invasive plant species while minimizing impact on desired native vegetation.

Reduced Wetland Impact: Sheep are lighter and more agile than cattle, causing less soil compaction and trampling damage. Studies in New Zealand and British Columbia specifically noted that sheep grazing can be preferable to cattle in fragile wetland environments vulnerable to poaching (soil damage from hoofprints in wet conditions).

Conservation and Economic Benefits

Vegetation Management Without Chemicals: Multiple studies demonstrate that moderate grazing intensity can increase plant species diversity and control dominant invasive species that exclude less competitive native plants. Research in California vernal pools showed that reintroduced grazing at moderate stocking rates significantly increased both diversity and native cover after just two years. European wetland studies found that patchy, occasionally intense grazing increased protected plant species and habitat heterogeneity while benefiting both conservation and agricultural goals.

Cost-Effective Management: The solar grazing industry demonstrates that sheep can provide effective, economical vegetation management. While mechanical mowing requires expensive equipment, fuel, and risks panel/infrastructure damage, sheep provide continuous low-cost maintenance while generating potential revenue through meat production.

Ecosystem Services: Properly managed grazing can create habitat heterogeneity that benefits wildlife. Research in Hungarian marshes showed increases in wetland bird populations, protected plant species, and patches of open vegetation with grazing intensity gradients. The key is avoiding continuous heavy grazing while allowing patchy, varied grazing pressure.

Carbon Footprint Reduction: Replacing mechanical vegetation management eliminates fossil fuel consumption for mowers while integrating livestock production into ecosystem restoration.

PRELIMINARY HYPOTHESES .

Vegetation Control

Hypothesis: Katahdin sheep grazing at moderate stocking densities (2-4 sheep/acre for 2-4 week periods) will significantly reduce biomass of target invasive species compared to ungrazed control areas, while maintaining or increasing native plant species diversity.

Water Quality

Hypothesis: Moderate-intensity sheep grazing will maintain water quality parameters (turbidity, nitrogen, phosphorus, fecal coliform bacteria) within acceptable ranges for wetland ecosystem health, with impacts significantly lower than documented cattle grazing effects.

SHEEP HEALTH

Hypothesis: Katahdin sheep grazing on Florida wetland vegetation will maintain adequate body condition scores and parasite resistance within acceptable management thresholds, requiring no more than 15% of animals to need anthelmintic treatment during the grazing period.

ECoNOMICAL VIABILITY

Hypothesis: Sheep grazing vegetation management costs will be ≤50% of equivalent mechanical mowing and herbicide application costs over a 12-month period, while producing marketable lamb weight gain.

Biodiversity Impact

Hypothesis: Sheep grazing vegetation management costs will be ≤50% of equivalent mechanical mowing and herbicide application costs over a 12-month period, while producing marketable lamb weight gain.

ETHICAL CONSIDERATIONS & LIMITATIONS .

ANIMAL WELFARE

  • All sheep management will follow American Veterinary Medical Association guidelines

  • Monitoring protocols ensure early detection of heat stress or health issues

  • Access to shade, clean water, and supplemental minerals as needed

  • Immediate veterinary intervention protocols established

Environmental Protections

  • Grazing exclusion during critical wildlife breeding/nesting periods

  • Monitoring for any decline in threatened or endangered species

  • Adaptive management to respond to unintended impacts

  • Coordination with Florida Fish and Wildlife Conservation Commission

Study Limitations

  • Results may be specific to Black Hammock Farm's wetland types and may not generalize to all Florida wetlands

  • Seasonal variation requires multi-year data collection for robust conclusions

  • Initial infrastructure investment may limit adoption by other landowners

  • Weather variability in Florida may affect consistency of grazing schedules

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1579 Walsh Street Oviedo,

Florida 32765

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© 2025 Black Hammock Family Farm. All rights reserved.