News
Untreated sewage and fertilizer runoff threaten the Florida manatee’s main food source, contributing to malnutrition
Aarin-Conrad Allen, Florida International University
The gentle, slow-moving Florida manatee has no natural predators.
And yet, these charismatic mammals face numerous threats.
Manatees are struck by vessels in busy waterways across the state, and a majority bear scars from these collisions.
Harmful algal blooms – characterized by the rapid growth of algae that degrades water quality – can impair their nervous systems.
With less blubber, or fat, compared with other marine mammals like whales, dolphins, seals and sea lions, manatees are vulnerable to cold-stress syndrome during winter months.
And they can ingest or get entangled in marine debris like derelict fishing gear and drown or be crushed by floodgate and water control structures.
I am a doctoral candidate in marine biology at Florida International University’s Institute of Environment. Over the past 15 years, I have gained extensive experience working with marine mammals, particularly manatees.
Recently, my colleagues at the United States Geological Survey, Florida Department of Environmental Protection and I documented a change in the dietary pattern of manatees. We found that manatees are eating less seagrass – traditionally their primary food source – and more algae than in decades past. This change occurred along Florida’s Atlantic coast during a period of extensive seagrass decline.
We believe this represents an emerging threat to the species’ survival.
Protected species
Manatees were listed as an endangered species under the Endangered Species Act of 1973. By the early 1990s, the manatee population in Florida had dwindled to less than 1,300.
Researchers believe that federal protection, along with additional state measures such as slow-speed zones and no-entry refuges, has contributed to the growth of the manatee population in Florida.
In 2017, manatees were reclassified from endangered to threatened. Surveyors counted 5,733 individual manatees during a statewide aerial survey conducted in 2019.
Florida manatees average 9-12 feet (2.7-3.7 meters) in length and typically weigh about 1,000 pounds (450 kilograms), but they can grow as large as 3,500 pounds (1,600 kilograms). As the largest fully aquatic herbivore, they consume 5% to 10% of their body weight in vegetation each day.
While manatees eat a broad diet of over 60 different plants, they most commonly feed on species of seagrass. Seagrasses are marine plants that, like land plants, have leaves, flowers, roots and seeds, and make their food through photosynthesis.
So what happens when these seagrasses are no longer available?
A changing estuary
The Indian River Lagoon is an estuary along Florida’s east coast that covers roughly 350 square miles (560 square kilometers) between the mainland and barrier islands, from Ponce Inlet to Jupiter Inlet.
It is a critical habitat for manatees, which feed on native seagrass meadows in the lagoon during their seasonal migrations.
Seagrasses are vital to the health of marine ecosystems. They are a habitat for juvenile fish and other marine organisms, provide food for aquatic herbivores, reduce carbon in the atmosphere and improve water quality. They also protect coastal habitats by stabilizing sediments and reducing wave energy that can erode shorelines and damage coastal infrastructure, especially during hurricanes.
For more than a decade, the Indian River Lagoon has experienced extensive loss of seagrass meadows, due to a series of algae blooms associated with nutrient runoff and degraded water quality from septic overflow leaching into the environment.
When untreated sewage and fertilizers flow into the estuary, they add nitrogen, phosphorus and other nutrients that drive excessive algal growth. These harmful algal blooms deplete oxygen levels and block sunlight, which seagrass needs for photosynthesis.
Between 2011 and 2019, over 50% of all seagrass in the lagoon was lost. This led to an increase in macroalgae and even led to a change in the animal communities that live in the lagoon. For example, among finfish, sheepshead populations declined, while seabream numbers increased. Invertebrate communities were also affected, with bryozoans colonizing areas previously dominated by barnacles.
Manatees along the Atlantic coast have suffered two unusual mortality events since the seagrass decline, including one that is ongoing. Researchers attribute the increase in manatee deaths to malnutrition due to a shortage of seagrasses in the Indian River Lagoon.
A shift in manatees’ diet
In our study, we examined 193 manatee stomach samples collected from carcasses recovered from the Indian River Lagoon during two time periods – one before and one after the onset of the seagrass loss in 2011.
We compared stomach sample contents from carcasses collected between 1977 and 1989 with samples collected between 2013 and 2015.
Our findings indicate that manatees consumed 45% less seagrass and 74% more algae after the seagrass decline.
Recently, in a study supported by FIU’s Center for Aquatic Chemistry and Environment, I investigated differences in the nutritional composition – like protein, fat, carbohydrate and fiber – of items identified in manatee stomach samples. My preliminary results show notable differences in the nutritional composition of seagrass and algae.
Marine mammals are particularly vulnerable to dietary shifts due to their large size and high energy demands. Such changes can worsen their physical health and increase the likelihood of starvation.
Depleted oxygen levels are having a similar impact on aquatic vegetation and seagrass meadows in other regions of Florida, like Biscayne Bay and the Caloosahatchee River and Estuary. This suggests that the ecological challenges seen in the Indian River Lagoon could become more widespread.
What is the solution?
Remediation efforts within the lagoon have incorporated the restoration of seagrass through aquaculture and replanting strategies, similar to efforts to restore coral reefs.
While the lagoon’s seagrass has recently shown signs of regrowth, the rehabilitation of the ecosystem must begin with improving and maintaining water quality.
Counties along the lagoon have enacted fertilizer bans that aim to reduce the levels of nitrogen and phosphorus in the water that drive algal blooms.
New research, however, indicates that these restrictions alone will not fix the problem, as residential septic systems are the primary source of nutrient pollution in the lagoon.
Furthermore, many of the factors contributing to harmful algal blooms are intensified by global warming and changing climate, which could accelerate the decline of seagrass in Florida and elsewhere.
Given the multiple, synergistic threats facing manatees, I believe that improving water quality, protecting their food sources, and further research – coupled with community outreach and education – are critical to ensure the long-term survival of this iconic Florida species.
Aarin-Conrad Allen, Ph.D. Candidate in Marine Sciences, Florida International University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Automotive
Nissan’s New Strategy: Innovation Meets Consolidation in a Changing Auto Market
Nissan’s New Strategy: Nissan is reshaping its lineup with fewer models, more hybrid technology, and smarter vehicles. Here’s what’s staying, what’s changing, and what it means for drivers.
Nissan’s New Strategy
As the global auto industry pivots toward electrification and smarter technology, Nissan is taking a more measured approach—introducing new innovations while trimming its lineup to focus on core models that drive sales and long-term value.
🚗 A Leaner, More Focused Nissan
In recent years, Nissan has begun reshaping its global strategy, reducing the total number of models while strengthening key vehicles across major segments. The goal is clear: prioritize profitability, streamline production, and invest in technology where it matters most.
Rather than flooding the market with new nameplates, Nissan is concentrating on a smaller, more competitive lineup—particularly in high-demand categories like SUVs and crossovers.
🔋 Innovation Where It Counts
Hybrid Technology Takes Center Stage
One of Nissan’s most important developments is its e-POWER hybrid system, which is set to debut more broadly in the U.S., particularly in the next-generation Nissan Rogue.
Unlike traditional hybrids, e-POWER uses a gasoline engine solely to generate electricity, while the wheels are driven by an electric motor. The result is a driving experience that feels closer to an EV—without requiring a charging station.
This technology reflects a growing industry reality: while electric vehicles are expanding, hybrids are emerging as a practical bridge for many consumers.
EV Evolution, Not Explosion
Nissan isn’t abandoning electric vehicles—it’s refining its approach.
The iconic Nissan LEAF is expected to return in a redesigned, crossover-style format, aimed at improving range, comfort, and mainstream appeal. However, Nissan is avoiding an aggressive all-electric push in favor of a balanced portfolio that includes gas, hybrid, and EV options.
Smarter Vehicles Through AI
Another key pillar of Nissan’s future is AI-assisted driving technology. The company plans to integrate advanced driver assistance and semi-autonomous features into a majority of its vehicles over the next several years.
These systems are designed to enhance:
- Safety
- Driver awareness
- In-car connectivity
While less visible than a new engine or redesign, this shift could become one of Nissan’s most impactful long-term innovations.
🚙 The Core Lineup: What’s Staying
Nissan’s future lineup is built around a group of proven, high-demand models that continue to evolve with new technology and features.
SUVs and Crossovers (The Backbone)
- Nissan Kicks – Entry-level, affordable, and recently redesigned
- Nissan Rogue – The brand’s best-seller and innovation leader
- Nissan Pathfinder – Family-focused with growing tech upgrades
- Nissan Armada – Large SUV with premium and performance appeal
These vehicles form a complete SUV ladder, covering nearly every price point and lifestyle.
Sedans (Reduced but Relevant)
- Nissan Sentra – Recently updated and positioned as the primary sedan
- Nissan Altima – Still available, though its long-term future is less certain
As consumer demand shifts toward SUVs, Nissan is scaling back—but not eliminating—its sedan offerings.
Trucks and Performance Models
- Nissan Frontier – A key player in the midsize truck segment
- Nissan Titan – Still present, but facing stiff competition
- Nissan Z – A modern revival of Nissan’s performance heritage
- Nissan GT-R – Nearing the end of its lifecycle, with a successor anticipated
These models help maintain Nissan’s identity beyond everyday transportation.
⚠️ Models Being Phased Out or Reevaluated
Not every vehicle is making the cut.
- The Nissan Versa is being discontinued after 2025
- The Nissan Ariya is seeing strategy adjustments depending on market demand
- Some low-volume global models are being eliminated as part of a broader consolidation effort
This reflects a broader industry shift: automakers are prioritizing efficiency and profitability over sheer volume.
🔍 The Role of the Nissan Kicks
One standout in this transition is the Nissan Kicks, which represents Nissan’s practical, value-driven approach.
Recently redesigned, the Kicks offers:
- Modern infotainment and safety features
- Improved comfort and available all-wheel drive
- Strong fuel efficiency at an affordable price point
While it doesn’t showcase cutting-edge hybrid or EV technology, it plays a crucial role as an entry-level gateway into the Nissan brand.
🧭 Industry Context: Why This Shift Matters
Nissan’s strategy mirrors broader trends shaping the automotive industry:
- EV adoption is growing—but unevenly
- Hybrids are gaining traction as a transitional solution
- SUV demand continues to dominate global markets
- Cost control and profitability are now top priorities
By focusing on fewer, stronger models, Nissan aims to remain competitive in a rapidly evolving landscape.
🧾 Bottom Line
Nissan is not simply cutting models—it’s redefining its identity.
- ✔️ Investing in hybrid technology, AI, and core SUVs
- ✔️ Maintaining key sedans, trucks, and performance vehicles
- ❌ Eliminating underperforming and low-demand models
The result is a lineup that is leaner, more technologically advanced, and better aligned with today’s market demands.
Sources
- Nissan to trim global car lineup, boost use of AI driving tech – Reuters
- 2027 Nissan Rogue Revealed with New Design and e-POWER Hybrid – Car and Driver
- 2027 Nissan Rogue Hybrid Preview – Autoweek
- Nissan CEO Confirms Xterra Return – Road & Track
- Nissan Kicks Official Page – Nissan USA
Related External Links
- Explore the Nissan Rogue – Official Site
- Nissan LEAF Electric Vehicle Overview
- Latest Nissan News and Reviews – Car and Driver
- Nissan Vehicle Reviews and Comparisons – MotorTrend
- Nissan News Coverage – Autoweek
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The Knowledge
Metrolink Offers Fare-Free Rides for Earth Day 2026 Across Southern California
Metrolink offers fare-free rides for Earth Day 2026 across Southern California, encouraging sustainable travel and reduced emissions.
Last Updated on April 21, 2026 by Daily News Staff
Metrolink Offers Fare-Free Rides for Earth Day 2026
LOS ANGELES — April 22, 2026 — In a continued push toward sustainable transportation, Metrolink will once again offer systemwide free rides on Earth Day, inviting commuters and travelers to leave their cars behind and explore a cleaner way to move across the region.
A One-Day Opportunity to Ride Free
On Wednesday, April 22, passengers can board any Metrolink train — including the Arrow service — without purchasing a ticket. The initiative is part of the broader celebration of Earth Day, encouraging environmentally conscious travel choices.
The fare-free program is designed to appeal to both regular riders and first-time users, particularly those navigating Southern California’s persistent traffic congestion and rising fuel costs.
Encouraging Sustainable Travel Habits
“Earth Day is a reminder that small changes, like choosing public transit over driving one day a week, can have a meaningful impact on our environment,” said Doug Chaffee, chair of the Metrolink Board.
With gas prices continuing to strain household budgets, the agency hopes the initiative will inspire more residents to consider rail as part of their regular commute.
Regional Connections Expand Access
Metrolink’s Earth Day promotion aligns with similar efforts by other Southern California transit providers. Riders can seamlessly connect to services operated by: LA Metro and the Orange County Transportation Authority, Riverside County Transportation Commission, San Bernardino County Transportation Authority and Ventura County Transportation Commission.
These partnerships extend the reach of fare-free travel across a six-county region, making it easier for riders to explore destinations without relying on personal vehicles.
Service Adjustments and Rider Tips
Passengers should note that trains will operate on a reduced weekday schedule, implemented earlier this spring. Despite the adjustment, all Metrolink lines and station cities remain in service.
For those planning a trip:
- No ticket is required — simply board the train
- Bikes are welcome, with capacity ranging from three bikes per standard car to nine in designated bike cars
- A curated destination guide highlights attractions within walking or biking distance of stations
Environmental and Economic Impact
Metrolink is also promoting its Personal Impact Calculator, a digital tool that allows riders to estimate how switching from driving to rail can reduce greenhouse gas emissions and lower fuel expenses.
A Broader Trend in Public Transit
Fare-free transit days have gained traction nationwide as agencies look to boost ridership and promote sustainability. Southern California’s expansive commuter rail network makes it particularly well-suited for such initiatives, offering a viable alternative to one of the country’s most car-dependent regions.
Bottom Line
Metrolink’s Earth Day promotion is more than a one-day free ride — it’s a strategic effort to shift commuter behavior, reduce environmental impact, and showcase the convenience of regional rail. For Southern Californians, April 22 presents a low-risk opportunity to rethink how they travel.
Source: Metrolink
https://metrolinktrains.com/news/metrolink-goes-fare-free-for-earth-day-on-april-22
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News
Money Management: The Importance of Financial Literacy
You may have mastered the core subjects like math and grammar in school, but financial literacy – or understanding the basics of money management in order to help you make better financial decisions – often goes overlooked before adulthood. It’s not so much a course of study as it is a plan of action. When you understand how to earn, save, spend and invest wisely, you aren’t just building a stable future for yourself, but your family and community as well.
(Feature Impact) You may have mastered the core subjects like math and grammar in school, but financial literacy – or understanding the basics of money management in order to help you make better financial decisions – often goes overlooked before adulthood. It’s not so much a course of study as it is a plan of action.
Financial literacy in the United States has remained stagnant at generally low levels for several years, according to research from TIAA Institute and the Global Financial Literacy Excellence Center, with even lower levels among Gen Z. Yet greater financial literacy – including key aspects such as goal-setting, budgeting, saving, credit management and investing – is strongly linked to better financial outcomes, including lower rates of debt constraint and financial fragility.
While emboldening yourself to understand financial terms can be a little overwhelming at first, once you have a grasp of basic concepts you can begin to get a handle on your money and make better financial decisions. Simply put: When you understand how to earn, save, spend and invest wisely, you aren’t just building a stable future for yourself, but your family and community as well.
From nonprofit partnerships to volunteer-led programs and fee online resources, Schwab and its employees help millions of people every year build the knowledge and confidence to take charge of their financial futures by serving as board members, mentors, role models and educators.
Because financial health is a lifelong journey, the earlier people learn vital money skills, the better. That’s why the financial advisory services provider develops education programs geared toward kids that continue into adulthood, helping people no matter where they are on their journeys.
Talk Money
It’s never too early to start a conversation about financial literacy. Having teens identify goals that are important to them – such as concert tickets or a first car – can kickstart coversations about money. Working with your child (and a financial advisor, if necessary) on a plan for saving to realize those goals can serve as a jumping off point. After achieving some success, their enthusiasm may grow, which is a powerful motivator to keep saving.
Support School Initiatives and Programs
Outreach programs that empower young people to make smart financial decisions is key to a bright future. Programs like Money Matters – Schwab’s flagship financial education program utilized by the Boys & Girls Clubs of America – gives young people hands-on experience with all aspects of money and investing.
This example, and others, don’t just include program funding – they build partnerships that create impact and opportunity with national collaborations that reach more than 17 million youth annually, empowering young people with the tools and confidence to make smart financial decisions for life.
Spread the Financial Love
Championing financial literacy empowers everyone – individuals, families and communities. By serving as a board member, mentor, role model or educator to help bring financial literacy to others in your community, you can supply the tools and knowledge to lead programs that focus on giving back, empowering future generations in countless ways.
To learn more about financial literacy and find resources to empower your local community, visit SchwabMoneywise.com.
Photo courtesy of Shutterstock
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