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Ecology & Evolutionary Biology (PHD) 
Program Description

The graduate program provides research training in ecology and evolutionary biology with areas of strength in biological diversity, evolutionary history and mechanisms, community structure, ecological interactions, behavior, development and mathematical biology.

Department/Academic Unit(s)

Ecology & Evolutionary Biology -

College of Science  
Campus where offered
Main Campus - Tucson  
Admissions Contact
Pennie Rabago-Liebig
Graduate Program Coordinator
Pennie Rabago-Liebig
Director of Graduate Studies
Jeremiah D Hackett
Graduate College Degree Counselor
Annie Prisbrey
Tuition and Fees
Please refer to the UA Bursar's Office Tuition and Fees Calculator for up-to-date information about tuition and fees. 
Please refer to the UA Registrar's's Office Special Course Fees for up-to-date information about special course fees. 

Admissions Information

Admissions Requirements

Statement of purpose
Curriculum vitae
Three Letters of Recommendation

Any additional information that will strengthen the application

Standardized Tests

Required English Proficiency Tests for International Students

Minimum TOEFL: 79 (internet based) or 550 (paper based)
Minimum IELTS: Composite of 7 (no subject lower than 6)

For funding as a Teaching Assistant:
Minimum TOEFL speaking score: 24   
Minimum total IELTS score: 7.5 or above with no score lower than 7 on any section of the test

GREs are not required.

Financial Aid

Teaching and Research Assistantships
Graduate College Fellowship
UA and CONACyT Fellowship for Mexican Doctoral Students (
Please also see Graduate College website on Financial Resources (

Admissions Deadlines

Domestic Applicants:

  • Fall: December 1

International Applicants:

  • Fall: December 1
International Conditional Admission
International applicants will not be considered for conditional admission by this program.
Other Information
The GRE Institution Code for The University of Arizona is 4832
NRC Taxon(a) for this program: Ecology and Evolutionary Biology

Completion Requirements

Degree Requirements

Minimum credits: 45  (36 for major in EEB and 9 for minor)
Core coursework: Total credits required: 45 plus 18 dissertation units

First semester: Two internships (ECOL610A & ECOL610B) plus ECOL610C- (Internship Presentation and Planning), ECOL 600B- Fundamentals of Ecology

Second semester: A third internship (ECOL610A) and a second term of ECOL 610C, ECOL 600A- Fundamentals of Evolution

Four semesters of ECOL596B-Population Biology (departmental seminar)
Language requirements: No foreign language requirement.
Other requirements: Two semesters serving as a graduate teaching assistant

At least once each year beginning in the second year, students must present a seminar in a general forum, usually in the departmental noon seminar (ECOL596B).

At least once each year beginning in the second year, students must meet with his/her Temporary or Dissertation Committee.

Minor Requirements

A minor in EEB requires 9 units of ECOL home courses.  Cross-listed courses and transfer credits will be considered on a case-by-case basis.

Student Handbook  

Program StatisticsInformation about these numbers

Program-level Information
Application Acceptance Rate 16%
Med. Time-to-degree (years) 5.75
Department-level Information
Enrollment Percent Male 47%
Enrollment Percent Female 53%
Enrollment Percent International 20%
Enrollment Percent URM 7%

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Last revised 09 Aug 2019