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Anadyomene (Chlorophyta) bloom in south Florida: causes, consequences and unanswered questions

Research output: Chapter in Book/Report/Conference proceedingC3: Conference Abstract

  • Ligia Collado-Vides
  • Christian Avila
  • Galia Varona
  • Frederik Leliaert
  • Dení Rodriguez
  • Diego Lirman
Macroalgal blooms are becoming a common problem in coastal waters and estuaries around the globe. Massive growths of macroalgae are conspicuous due to their economic and ecological impacts. In order to manage these blooms, we need to understand which are species involved, and which factors cause bloom formation. Biscayne Bay in south Florida has experienced a persistent bloom of Anadyomene species causing loses of seagrasses. The general hypothesis is that macrolagal blooms are caused by nutrient enrichment. Morphological and molecular phylogenetic analyses were used to test the taxonomic identity of the blooming species; tissue nutrient content (N, P) was used to evaluate nutrient limitation; δN15 in tissue and sucralose content in water were measured as indicators of anthropogenic signature, and field surveys were conducted to estimate the percent cover of Anadyomene spp. and seagrasses. Two species of Anadyomene were found with one potentially new species to science. High % cover of Anadyomene spp. were found closer to land (75-100%), and high levels of δN15 (12-13 δ15N‰) were found at sites close to land. High sucralose levels (36-170 ng/L), were detected closer to canals demonstrating that the area is affected by anthropogenic nutrients. We were able to demonstrate that there are anthropogenic sources of nutrients at the area of the bloom. There is a clear need of interaction of ecologists, physiologists, and taxonomists to detect potential species that threat coastal waters, and we urgently need to find efficient management strategies to control nutrient enrichment at local, regional and global scales.
Original languageEnglish
Title of host publicationLatin American and Caribbean Phycology Congress, book of abstracts
Publication date2017
Publication statusPublished - 2017
EventLatin American and Caribbean Phycology Congress - Cali, Colombia
Duration: 3-Jul-20177-Jul-2017
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