Science University Research Symposium (SURS)

Publication Date

Fall 11-2025

College

College of Sciences & Mathematics

Department

Biology, Department of

SURS Faculty Advisor

Darlene Panvini

Presentation Type

Poster Presentation

Abstract

This study aimed to analyze decomposition rates of plants containing different amounts of lignin. Lignin can be found within cell wall structures in plants and aids in natural rigidity. Opuntia humifusa was chosen to represent plants with high levels of lignin, and Allium schoenoprasum was chosen in contrast because of its significantly lower levels of lignin. Due to these characteristics, A. schoenoprasum is hypothesized to decompose at a quicker rate than O. humifusa. To test this hypothesis, eight samples of O. humifusa and eight samples of A. schoenoprasum were placed in litter bags to prevent macroorganisms from aiding in the decomposition process. These bags were then placed directly in contact with the soil and left outside. One litter bag of A. schoenoprasum and one of O. humifusa were collected and weighed to analyze how much biomass was lost four times over the semester. Results from biomass loss aligned with our original predictions. Over time, A. schoenoprasum lost significantly more biomass than O. humifusa. Varying rates of decomposition in the same environmental conditions due to different leaf composition can affect nutrient availability and the ecological significance of nutrient dispersal timing. Understanding decomposition rates of plant species enables gardeners to diversify the surrounding ecology and benefit local communities.

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