3: An entomologist studying bee pollination tracks 500 visits to flowers over a day. On average, each bee visits 25 flowers per hour, and the foraging activity lasts 6 hours. If the average pollen load transferred per flower visit is 0.04 mg, what is the total mass of pollen transferred by all bees during the day, in milligrams? - Parker Core Knowledge

Understanding the Context

The study focused on a highly active bee population whose foraging behavior was meticulously recorded. Over 24 hours, a single bee visits an average of 25 flowers per hour, with the entire foraging period lasting 6 hours per bee. Combined, this means each bee visits a total of:

25 flowers/hour × 6 hours = 150 flower visits per day

With 500 total flower visits logged that day across all bees, researchers determined there were:

500 flower visits ÷ 150 visits per bee = approximately 3.33 bees active during the observed period

Key Insights

However, more accurate tracking reveals the entire daily effort contributes significantly—even if some bees are active in shifts. For simplicity in modeling, assume the total observed pollination effort led to 500 verified flower visits, with each branch of analysis focusing on cumulative pollen transfer.

Calculating Total Pollen Transfer

Each flower visit transfers an average of 0.04 milligrams (mg) of pollen. Therefore, the total mass of pollen transported is calculated as:

500 flower visits × 0.04 mg of pollen per visit = 20 mg of pollen

This cumulative amount underscores the sheer impact of even small pollen loads per visit—multiply this daily transfer by the thousands of visits across multiple days, and the ecological significance becomes profound.

Final Thoughts

Why This Matters in Entomology

Tracking individual and collective pollination activity allows entomologists to:

• Quantify ecosystem services provided by bees
  
• Predict impacts of habitat loss or pesticide exposure on pollination networks
  
• Guide conservation efforts to protect vital pollination pathways

By connecting precise visit rates and pollen loads, researchers turn behavioral observations into actionable data, supporting sustainable agriculture and biodiversity preservation.

Conclusion

In this detailed study, the entomologist’s data—500 flower visits, 25 visits per bee per hour over 6 hours, and 0.04 mg pollen per visit—yielded a clear answer: 20 milligrams of pollen were transferred in one day. This measurement highlights the power of small-scale ecological interactions, proving how essential bees are to maintaining plant diversity and food security worldwide.