Date of Award
2022
Document Type
Dissertation
Degree Name
Doctor of Philosophy (PhD)
Department
Natural Resources
First Advisor
Gillian Galford
Abstract
Harmonizing biological diversity and crop production is a major goal towards building more sustainable food systems. Soil invertebrates are diverse and abundant organisms in agriculture, but relatively little is known about their benefits or how agricultural management impacts them. In this dissertation, I dig into the complex interactions between agricultural land use and soil invertebrate biodiversity to better inform farmer decision-making. I find that soil invertebrate communities have major potential contributions to agroecosystems (Chapter 2) and are shaped heavily by agricultural land use (Chapters 3, 4), but remain too uncertain to contribute to farmers’ management choices (Chapter 5). First, I identified four main mechanisms by which soil invertebrates contribute to carbon cycling through a review of over 600 articles. I linked these mechanisms to agriculturally-relevant ecosystem services such as climate regulation, pest control, and crop and livestock production (Chapter 2). I then studied the novel perennial crop, milkweed, in comparison to other common New England land uses and found that milkweed hosts taxonomically and functionally diverse arthropod communities (Chapter 3). Testing an emerging agricultural practice for weed suppression, tarping (placing plastic sheets over crop beds), I found that tarps caused an immediate negative effect on arthropods. Recovery of arthropods varied after tarp removal, though many groups recovered within 3-5 weeks (Chapter 4). Finally, I sought to more broadly understand the complex tradeoffs of tarping using mixed methods and participatory action research. In interviews, farmers expressed that they valued soil biodiversity, but, apart from pest species and earthworms, had limited knowledge of these communities on their farms (Chapter 5). This dissertation expands knowledge on soil invertebrate diversity in agriculture, but highlights that considerable work is needed to raise awareness of this group and promote their inclusion in decision-making.
Language
en
Number of Pages
266 p.
Recommended Citation
Kinnebrew, Eva, "Soil Invertebrates In Agriculture: Assessing Ecosystem Services, Biodiversity Impacts, And Farmer Perceptions" (2022). Graduate College Dissertations and Theses. 1537.
https://scholarworks.uvm.edu/graddis/1537