Characterizing Nitrogen and δ15N Values in the Tissues of a Windward Population of Avrainvillea lacerata, an Invasive Green Alga
Date
2021
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Abstract
The green alga Avrainvillea lacerata was first discovered in Hawaiʻi by Brostoff in 1989.
The plant is invasive, and its history has not been well documented. It has continued to
proliferate along the shores of O‘ahu, and is projected to invade a quarter of all coastlines in the
Main Hawaiian Islands (MHI) due to climate change. To understand the fundamental
relationship between nitrogen (N) availability and algal growth, in opposing wet and dry seasons,
A. lacerata blade tissues were sampled to examine δ15N (‰) and %N in photosynthetic tissue
and compared with dissolved inorganic nitrogen (DIN) in the water column at Kualoa Regional
Beach Park (KBP) on the northeastern side of Kāneohe Bay. Tissue values in this study were
compared with data collected from a leeward population of A. lacerata in Maunalua Bay. A.
lacerata as well as other invasive algae can be used to assess the availability of sources in coastal
environments.
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invasive algae, invasive species, main hawaiian islands, ecosystem, nitrogen
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37 pages
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Huynh-Nguyen, Tina
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