Dr. John McCreadie

Dr. John McCreadie




Ph.D. - Ecology and cytogenetics
Memorial University, NF - 1991

Research Interests


Freshwater Ecology & Entomology

For more details, go to his research page.

Recent Publications


McCreadie JW, Adler PH. 2019 Spatial distributions of rare and common species in a widespread group of stream insects. Freshwater Science.  In Press

McCreadie JW, Adler PH. 2018. Patterns of regional beta diversity in a widespread group of North American aquatic insects. Freshwater Science.  37: 631-639. 

Adler PH, Borkent A, Hamada N and McCreadie JW. 2017. Biodiversity of Simulium metallicum sensu lato (Diptera: Simuliidae), a complex of Neotropical vectors associated with human onchocerciasis. Acta Tropica 171: 171 - 179. 

McCreadie  JW, Hamada N, Grillet ME and Adler PH. 2017.  Alpha richness and niche breadth of a widespread group of aquatic insects in Nearctic and Neotropical streams. Freshwater Biology. 62: 329-339.

McCreadie JW, Williams RH, Stutsman S, Finn DS and Adler PH. 2017.  The influence of habitat heterogeneity and latitude on gamma diversity of the Nearctic Simuliidae, a ubiquitous group of stream-dwelling insects. Insect Science DOI: 10.1111/1744-7917.12442

Adler PH, Inci A, Yildirim A, Duzlu O, McCreadie JW, Kúdela M, Khazeni A, Brúderová T, Seitz, Takaoka H, Otsuka Y and Bass JR. 2015. Are black flies of the subgenus Wilhelmia (Diptera: Simuliidae) multiple species or a single geographic generalist? Insights from the macrogenome. Biological Journal of the Linnean Society. 114: 163-183.

McCreadie JW and Adler PH. 2014. Abundance–occupancy relationships of larval black flies (Diptera: Simuliidae) in temperate Nearctic streams. Insect Conservation and Diversity. DOI: 10.1111/icad.12075 pp 1 - 10. 

Daniel CE and McCreadie JW. 2014. Assessment of Mercury accumulation in the water column,stream sediments and larval black fly (Diptera: Simuliidae) tissue in the coastal streams of Alabama, USA. Journal of Water, Soil and Air Pollution.  225:1907. DOI 10.1007/s11270-014-1907-z

McCreadie JW and Bedwell C. 2014. Species composition of local riffle beetle assemblages in small coastal streams of the Gulf of Mexico: the influences of local and regional factors. Aquatic Ecology, 48: 127-141

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Experimental Designs in Biology  (BLY 304) 

Biological has moved from an historically qualitative discipline to one that is quantitative. Thus, it has become increasingly important for Biology students to develop strong analytical skills. Experimental designs in Biology is intended to provide students with the basic skills experimental design and statistical methodology needed in modern biological research. Additionally, student will learn basic statistical software (e.g., Minitab, Ecosim, Resampling Procedures, PAST).

General Entomology  (BLY 354) 

Emphasis is placed on insect form, function, classification, and evolution, as well as their impact on human societies. In addition, the student will be expected to make an insect collection of at least 75 families with at least 75 specimens.

Freshwater Ecology  (BLY 426/526)

With emphasis placed on lakes, streams, ponds, and wetlands, this course will focus on four major aspects of freshwater ecology: i) physical and chemical properties of water; ii) ecology and taxonomy of aquatic organisms; iii) links between different freshwater systems; and iv) human influence on freshwater ecosystems (eutrophication, acidification, hydroelectric projects, introduced species etc.).   In addition, students will be required to submit a collection of local freshwater invertebrates and fish.

Biometry  (BLY 520) 

The aim of Biometry is to provide a solid foundation in some of the applications of basic statistical techniques used in modern biological research. In addition the student will become familiar with several commonly used statistical software packages. Topics covered in this course were selected because they are commonly encountered in the practice of biology and will provide a basis for learning other techniques.