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Predicting Herbivore Survival Based on Water and Nutrient Availability

This study explores how large herbivores survive based on water and nutrient availability, impacting plant abundance and quality. It discusses assumptions and thresholds for herbivore persistence in different environments. Can herbivore diversity be highest at intermediate moisture and high nutrients? Learn about biodiversity hotspots for conservation priorities.

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Predicting Herbivore Survival Based on Water and Nutrient Availability

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  1. Global environmental controls of diversity in large herbivores Han Olff, Mark E. Ritchie & Herbert H.T. Prins

  2. Where a herbivore can survive is controlled by available resources: particularly plant abundance and quality. 2) Plant abundance and quality is controlled by available water and soil nutrients. So, is it possible to predict where a herbivore can survive based only on available water and nutrients?

  3. Assumption 1 • Plant abundance increases with increased moisture and nutrients.

  4. Assumption2 2) Plant quality decreases with increased moisture but increases with increased nutrients.

  5. Assumption 3 3) Large herbivores can persist in areas where plant quality is low if plant abundance is high.

  6. Assumption 4 4) Small herbivores can survive in areas where plant abundance is low if plant quality is high.

  7. Plant abundance (high) herbivore persists Abundance threshold (low)

  8. Plant quality quality threshold (low) (high) herbivore persists

  9. Together… Herbivorepersists

  10. Intermediate moisture High nutrients

  11. Is diversity highest at intermediate plant available moisture?

  12. Is herbivore diversity highest at high nutrients?

  13. Biodiversity hotspots for conservation priorities… (Myers et al. 2000 (Nature))

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