A massive log in a Tree fern and Eucalypt forest, Mount Field National Park, Tasmania, May 2019.

Nina Hewitt: I am a biogeographer specializing in plant dispersal, migration and disturbance ecology in temperate forests and alpine ecosystems, with field sites in Ontario, British Columbia, and the Karakoram-Himalaya. I am particularly interested in studying the impacts of human activities associated with, for example, ecosystem fragmentation, altered disturbance regimes, introduced invasive species and climatic change, and in finding solutions to manage these impacts. My longstanding research on plant dispersal and colonization in fragmented forest systems of Southern Ontario (examples here, here and here) provided the data with which to build a mathematical model of tree migration. This research informs policies to address climate change-induced range shifts such as the policy of Assisted Species Migration that I teamed up to examine here. I recently extended my research on plant species migration in “flat” continental landscapes to examine high alpine plants in the Central Karakoram-Himalaya and the mountains of southern BC. As part of that research, I created an open source, sortable online database of the historical upper elevation limits, modern taxonomic nomenclature, and regional occurrence of > 500 high alpine plant species in the Karakoram-Himalaya, based on little-known late 19th and early 20th century explorer reports for the region (information here).

Subalpine daisy in a wet alpine meadow, S Chilcotin Mts, ca 1950 m. N Hewitt Jul 2019

Disturbance ecology is one of my focus areas. Understanding the role of “natural”, long-running disturbances in ecosystems is essential to managing for changing conditions. Disturbance from fire is now recognized to be a normal and necessary process in many ecosystems, despite the decades-long fire suppression practices in North America by European settlers. I led a study of the pre-suppression fire history in High

Alpine daisy growing at 4,350 m on the Deosai Plateau, Karakoram-Himalaya. N Hewitt, Jul 2016

Park Toronto’s globally significant Black Oak savanna, to inform fire reintroduction practices underway in the park. We found that fires occurred at least every 30 years across the savanna in the immediate pre-settlement and concurrent settlement period.

I aim to share my enthusiasm for ecosystem ecology in my teaching. This has led me to build a series of Virtual and Augmented Field trips in alpine herb and mid-latitude forest ecosystems. These trips bring the field to the student (Virtual) and the student to the field (Augmented) and inform my own research about ongoing changes in these ecosystems. Have a look at the tours posted on this website. I welcome any feedback. Enjoy!

Students

IMG_1549 2Holly Denson-Camp is a fifth-year undergraduate student pursuing a BA in Geography (Environment & Sustainability). She is passionate about biogeography, Indigenous-led conservation strategies, and climate change communication. In her spare time, Holly is the president of the Geography Students’ Association and an avid lover of thrifting, painting and ocean swimming.

 

 

2020-21: Undergraduate: Meghan Little, BA; Angela Liu, BA; Samantha Loo, BA (work on interactive H5P webpages for course instruction; and Historical Karakoram Storymap and DEM (Liu)

Graduate: Kevin Pierce, PhD: work on statistics and data science resources

2019-20: Kelly Hurley, BA; Emily Ballon, BSc., Mariana Garcia, BA

2018-19: Amanda Eliora, BA; Shaun Yap, BA candidate

Land Acknowledgement: We are grateful for the opportunity to learn on UBC’s Point Grey campus, that is on the traditional, ancestral and unceded lands of the  xʷməθkʷəy̓əm (Musqueam) Peoples.