Date of Original Version
Temperate coastal estuaries worldwide, such as Narragansett Bay, Rhode Island, are influenced by seasonal macroalgal blooms (e.g., Ulva) during warm months, whereas bloom-forming macroalgae are rarely encountered during winter. We assessed the ability of distromatic Ulva to overwinter through fragments, recruits, and/or microscopic propagules. We documented (a) small tissue fragments in sediment cores and the water column, (b) recruits and microscopic propagules on field-based settlement tiles, and (c) production of reproductive propagules, throughout the winter months. Laboratory culturing experiments indicated that both fragments and propagules are viable. Our data indicate that bloom-forming overwintering Ulva simultaneously use multiple reproductive strategies.
Rinehart, Shelby; Guidone, Michele; Ziegler, Amanda; Schollmeier, Tanja; Thornber, Carol. (2014). "Overwintering strategies of bloom-forming Ulva species in Narragansett Bay, Rhode Island, USA." Botanica Marina. 57(4): 337-341. Available at: 10.1515/bot-2013-0122