A marine biologist studying dolphin populations recorded 120 dolphins in a coastal region during her first year of research. In her second year, she observed a 25% increase in the population, and in the third year, the population increased by an additional 15%. How many dolphins did she record in total over the three years?

Wed, 06 May 2026 16:42:08 +0000

**A Marine Biologist’s Dolphin Count: A Growing Story Off the US Coast** Every year, marine ecologists turn their lenses to coastal waters to track populations of one of the ocean’s most fascinating species—dolphins. Recent research by a dedicated marine biologist reveals a compelling trend: a shift in dolphin numbers over a three-year period in a key U.S. coastal region. This story taps into growing public interest in wildlife conservation, climate impacts on marine life, and community engagement in science—trends underscored by rising concerns about ecosystem health and biodiversity monitoring. In her first year of fieldwork, the biologist documented a population of 120 dolphins, offering a baseline for what scientists later tracked through seasonal growth. By the second year, a 25% increase signaled positive momentum—perhaps due to improved habitat conditions, conservation efforts, or reduced local threats. In the third year, the population rose another 15%, bringing the cumulative growth to a notable 31.25% total. While raw numbers vary in fluctuating ecosystems, this pattern reflects resilience and natural expansion worthy of attention. **Why This Data Matters in the US Coastal Scene**
Dolphin population trends have become markers for broader environmental health. In coastal communities across the United States, marine biologists observe these shifts closely. They reflect not only species well-being but also inform policy, tourism, and educational initiatives. Increased dolphin numbers can spark local pride and interest in marine conservation, drawing public engagement through citizen science projects, school programs, and eco-tourism opportunities.