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Marine Science Tier 1 Courses

Tier 1 courses provide students with a foundational understanding of ocean sciences, with a focus on marine biology and its related subdisciplines. These courses introduce the diversity of marine life and examine the biological, chemical, and physical processes that shape ecosystem dynamics within marine environments. Each course is designed to address current and relevant environmental challenges while preparing students for progression into Tier 2 research-focused workshops. Tier 1 courses also serve as an ideal entry point for students with a general interest in marine science and those exploring potential academic and professional pathways within the field.

Tier 1 Courses

Here are the Tier 1 courses offered for the program. After successful completion of ONE Tier 1 course, students may apply for a Tier 2 course. See below for course details.

Fall 2025

Introduction to Marine Science

Winter 2026

Marine Biodiversity: Coral Reef Ecology and Conservation

Spring 2026

Navigating Research: Laying the Foundation for Exploration

Quarter Dates, Schedules, and Deadlines

Introduction to Marine Science (Live Online - Fall 2025)

Introduction to Marine Science 

  • Dates: September 22, 2025 to November 14, 2025 
  • Units: 4.00 Pre-College units, 90000 level 
  • Open to: 9th-12th grade students. Additionally, students must be at least 14 years of age by the commencement of the program.  
  • Application: CLOSED
  • Application Deadline: September 10, 2025 
  • Payment Deadline: Payment is due within two weeks of acceptance. For students accepted after August 29, payment is due by September 12, 2025.  
  • Course Delivery: Online 
  • Tuition: $2,000 
  • Schedule:   
    • Tuesday and Thuesday - 4:30 p.m. to 5:50 p.m. PT, live online sessions. 
    • Asynchronous - two to three hours of additional work per week. 
    • Instructor: Nicole Yen 

The Introduction to Marine Science course offers a deep dive into the vast and complex world of our oceans. It provides students with an immersive experience into the dynamic processes that govern the marine environment, from the microscopic plankton that form the base of the food web to the majestic blue whales that traverse the ocean basins. Students will explore the intricate chemical cycles that sustain life in the oceans, the physical forces that shape marine habitats, and the diverse biological communities that inhabit them.    

The course covers a wide range of topics, including:    

Chemical Oceanography: Examining the chemical properties of seawater, biogeochemical cycles, and the role of the oceans in global chemical processes.   

Physical Oceanography: Studying ocean currents, waves, tides, and the physical structure of the oceanic environment.   

Biological Oceanography: Investigating the diversity of marine life, their ecosystems, and the biological processes that sustain them.   

Marine Ecology: Investigating the relationships between marine organisms and their environments, including food webs, symbiotic relationships, and ecosystem dynamics.   

Human Impact: Assessing the effects of human activities on marine ecosystems, including pollution, overfishing, and climate change.     

Students will also have opportunities to engage with current research and learn about the latest technological advancements in marine science. It prepares students for diverse careers in marine research, policy development, environmental stewardship, and other related fields. By exploring the intricate web of life and the physical dynamics that shape the marine environment, students will learn to appreciate the ocean’s significance to global ecosystems and humanity’s role in safeguarding its future. This course is designed to inspire a new generation of marine scientists, equipped with the knowledge and skills to contribute to the understanding and preservation of our oceanic world.   

 This course can act as a prerequisite for any Tier 2 courses offered.    

Topics Include :  

  • Fundamentals of Oceanography   
  • Introduction to Organismal Biology   
  • Marine Ecosystem Diversity and Services   
  • Marine Conservation and Marine Science Careers    

Marine Biodiversity: Coral Reef Ecology and Conservation (Live Online - Winter 2026)

Marine Biodiversity: Coral Reef Ecology and Conservation

  • Dates: February 10, 2026 - March 5, 2026
  • Units: 2.00 Pre-College units, 90000 level
  • Open to: 9th-12th grade students. Additionally, students must be at least 14 years of age by the commencement of the program. 
  • Application: Click here to apply!
  • Application Deadline: January 23, 2026
  • Payment Deadline: Payment is due within two weeks of acceptance. For students accepted after January 23rd, payment is due by January 30, 2026.
  • Course Delivery: Live Online
  • Tuition: $1,500
  • Schedule:  
    • Tuesday and Thursday - 4:30 p.m. to 5:50 p.m. PT, live online sessions.
    • Instructor: Nicole Yen
Coral reefs are one of the most biologically diverse and valuable ecosystems on Earth. In the Coral Reef Ecology and Conservation Course, students will learn how physical, chemical, and biological processes create incredible coral reef systems worldwide. The focus of this class is to understand the dynamic interactions of reef communities and their ever-changing environment, as well as the short- and long-term impacts of various stressors. Students will also learn various survey techniques used to monitor coral ecosystems and can participate in citizen science projects using Allen Coral Atlas and NOAA databases. Furthermore, students will gain practical skills in setting up and maintaining their own reef tanks, allowing them to apply their knowledge while promoting sustainable aquarium practices and appreciating the complexities of coral care in a controlled environment.

This course can act as a prerequisite for any Tier 2 courses offered.   

By the end of the course, students will:

  • Understand the ecology, biodiversity, and environmental processes that shape coral reef ecosystems.
  • Examine natural and human-driven stressors affecting coral reefs and their ecological impacts.
  • Learn reef monitoring and survey techniques, including participation in coral reef citizen science projects.
  • Apply coral reef knowledge through reef tank setup and maintenance, emphasizing coral health and sustainable aquarium practices.

Navigating Research: Laying the Foundation for Exploration (Live Online - Spring 2026)

Navigating Research: Laying the Foundation for Exploration

  • Dates: March 30, 2026 - May 20, 2026
  • Units: 2.00 Pre-College units, 90000 level
  • Open to: 9th-12th grade students. Additionally, students must be at least 14 years of age by the commencement of the program. 
  • Application: Click here to apply!
  • Application Deadline: March 13, 2026
  • Payment Deadline: Payment is due within two weeks of acceptance. For students accepted after March 13th, payment is due by March 27, 2026.
  • Course Delivery: Live Online
  • Tuition: $2,000
  • Schedule:  
    • Monday and Wednesday- 4:30 p.m. to 5:50 p.m. PT, live online sessions.
    • Instructor: Nicole Yen and Sonya Timko

 

Human activities, including pollution and climate change, are having profound and diverse impacts on our oceans. As environmental challenges continue to escalate, it becomes increasingly important to understand how these changes will affect marine ecosystems and the organisms that rely on them. Students will explore two key research themes that are crucial for understanding the diverse impacts of environmental changes on the oceans: 1) the effects of thermal stress on the physiology and ecology of marine organisms and/or understanding thermal exchange in a changing climate; and 2) using innovative tools like environmental DNA (eDNA) to enhance ecosystem and biodiversity monitoring and how these tools allow for more comprehensive assessments of ecosystem biodiversity helping to better inform conservation efforts. 

This course will also introduce students to the scientific method, focusing on designing and conducting a capstone research project, culminating in a research proposal that students can utilize for future projects. Through lectures, discussions, and case studies from topic experts, students will gain a deeper understanding of how human activities and climate change are transforming the marine environment.

This course is strongly recommended as a prerequisite for our summer research program. Students who complete this course will receive priority in selecting their research project themes. For more details on the available research themes, please refer to our summer research experience “Investigating Human and Climate Impacts on Oceans and Biodiversity”.

 

Theme 1: Thermal Biology

  • Coastal Ecosystems
    • Exploring the biodiversity of coastal habitats
  • Thermal Processes 
    • Emphasizing heat transfer via Conduction, Convection and Radiation 
  • Metabolism
    • Measuring changes in biological processes over 10℃ difference
  • Behavioral Thermoregulation
    • Detecting behavioral changes related to temperature differences
  • Thermal Ecology
    • Observing thermal processes of organisms through interactions with their environment
  • Fluorescence and Heat Patterns
    • Discovering how temperature affects fluorescence in organisms

Theme 2: eDNA & Biomonitoring

  • Functional Roles of Bacteria 
    • Understanding bacteria as ecosystem drivers and indicators of ocean health
  • eDNA Shotgun Metagenomics vs Metabarcoding
    • Detecting genetic material shed by organisms into the environment using two techniques. Shotgun is a technique that sequences all DNA in a sample, and metabarcoding uses specific DNA barcodes to identify species. 
  • YSI Water Quality
    • Using electronic sensors to measure key water quality parameters
  • Quadrat and Transect Monitoring
    • Using field methods to measure and compare biodiversity, abundance, and environmental patterns 
  • Plankton Sampling and Monitoring
    • Using field and lab methods used to collect, identify, and quantify plankton communities

Other Program Information

Application

Application: Click here to apply!

Space is limited, and students will be accepted on a rolling basis. Applications are subject to closing earlier should the program meet its enrollment capacity.

  • Winter 2026 Application Deadline: 11:59 p.m. on Friday, January 23, 2026
  • Spring 2026 Application Deadline: 11:59 p.m. PT on Friday, March 13, 2026
Payment Deadline: Within two weeks of acceptance, or sooner if the program begins earlier.

Acceptance

Students will be notified of acceptance within 10-14 days business days of submitting their application until the program is full.

FAQs

What are 90000 level pre-college units?
Are award of completion certificates available?
How do I request an official/unofficial transcript?
How do I access my grade report?

What are 90000 level pre-college units?
Courses numbered 90000-99999 are non-credit-bearing, pre-college-level courses designed to provide an opportunity for students to explore academic interests or prepare for college admission. Research Scholars pre-college units may be transferable for secondary school credit at the discretion of the receiving institution. Students should discuss the transferability of individual courses with the registrar of their secondary school prior to enrolling.

Are award of completion certificates available?
Award of completion certificates are not available for the courses. However, students are welcome to request a transcript or downloand and print their grade report by logging in your MyExtension here.

How do I request an official/unofficial transcript?
For instructions on how to order and pay for an official/unofficial transcript, please click here. If you’ve never ordered transcripts through Parchment before, you will need to register for a Parchment account. Details can be found from the link above.  All transcripts will be printed and delivered by one of the methods listed here. Transcript requests are processed by Student Services. Should you have any questions, please contact them at unex-reg@ucsd.edu.

Please note that when grades are not yet posted for the current term, you can still request an official transcript by selecting the "Hold for current quarter grades" option on the transcript request form, which instructs Student Services to wait to send the transcript until all current grades are officially posted to your academic record. This process ensures the transcript reflects your most up-to-date academic performance before it is sent to the requested recipient. 

You can also view/download your grade report by logging in your MyExtension here without needing to make a payment. 

How do I access my grade report?
Your final grade reports will be available in MyExtension within three weeks after the last day of class. For current blended, hybrid or online courses, you can access grades for individual assignments through Canvas or by contacting your instructor.

Cancellation/Refund Policies

Students will receive a full refund for a cancellation or withdrawl from a course if this is requested 15 business days in advance of a course start date. Refunds are not granted for students who are dismissed from the program.

You can drop courses online in a few easy steps:

  1. Log in to MyExtension.
  2. Navigate to "My Courses" and select the course you would like to drop.
  3. On the right side under "Tools" select "Drop Course."
  4. In the pop-up window that appears, select "Submit."

Or submit a written drop request:

You may file a petition for an exception to the refund policy if you are unable to continue enrollment for one of the following reasons:

  • Sudden serious personal illness, injury or hospitalization
  • The sudden serious illness, injury, hospitalization or death of a close member of your family
  • Compulsory military service
  • A documented administrative error that affected your enrollment
  • Extreme and unusual circumstances which were beyond your control

Refunds will take approximately four to six weeks to process. Refunds are issued in the same method of payment (check or charge) of payment to the program.

Learn More

You can also learn more about the program by visiting our Research Scholars Marine Science website: