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mesocosm levels are required to tease out specific fungal functions and directly test the causality of
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important management decisions and environmental variables not manipulated here (e.g., understory
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composition). Second, field studies characterizing fungal communities on natural healthy tree islands
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and ghost islands would determine if fungal diversity on constructed islands closely reflects natural
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communities and help identify pathogens or other taxa involved in reduced ecosystem function.
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Collectively, the results of the work presented here and those of the suggested studies will help inform
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management that increases the benefit of fungal communities for the restoration and conservation of
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fungal diversity in this threatened ecosystem.
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Supplementary Materials: The following are available online at http://www.mdpi.com/1424-2818/12/9/0324/s1:
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Figure S1: The layout of LILA includes eight tree islands, half of which were constructed with peat cores and half of
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which were constructed with limestone cores. Limestone core islands are indicated with hashed lines. Each island
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was divided into four quadrants in 2006 and randomly assigned to one of four tree planting density treatments.
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Initial tree planting density is indicated by the color of quadrants on each island; red: 1 m, green:1.67 m, blue:2.33 m,
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purple: 3 m spacing (i.e., distance between trees), Figure S2: An example map of one tree island within LILA.
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Each colored point represents one of 8 different tree species, initially planted in four density treatments. Each white
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plus indicates locations where soil samples were collected. The following tree species were planted in 2006 and
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are included in the tree species legend above: AG = Annona glabra; AR = Acer rubrum; BS = Bursera simaruba;
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CI = Chrysobolanus icaco; FA = Ficus aurea; IC = Ilex cassine; MC = Morella cerifera; PP = Persea palustris. In 2007,
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Eugenia axillaris and Myrsine floridana were added to replace trees that did not survive initial plantings, Figure S3:
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Distribution of fungal functional guilds (A) and trophic modes (B) across the eight experimental tree islands.
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(A) Each color represents the relative abundance of one of the 15 guilds to which FUNGuild assigned fungal taxa.
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(B) Each color represents the relative abundance of one of the four trophic modes that fungal taxa were assigned
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by FUNGuild. In both graphs, each vertical bar represents an individual site, and sites are grouped based on tree
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island (represented by numbers 1–8, island numbers 1, 4, 6, and 7 were limestone core islands and 2, 3, 5 and 8
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were peat core islands), Table S1: Indicator taxa for limestone (L) and peat (P) core island communities identified
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by the indicator taxa analysis. A is the probability that a site belongs to a core type, given the taxa has been found
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at that site. B is the probability of finding that taxa in sites with that core type. The indicator values are between 0
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and 1 with greater indicator values demonstrating greater specificity of a taxa to that core type.
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Author Contributions: Conceptualization, B.K.A. and M.E.A. with advice from E.C., F.S., M.S.R., and S.L.S.;
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methodology, all authors; experimental facility management, E.C. and F.S. formal analysis, B.K.A.; investigation,
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Diversity 2020, 12, 0324 13 of 17
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B.K.A. and M.E.A.; data curation, B.K.A., M.S.R., J.P.S., and S.L.S.; writing—original draft preparation,
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B.K.A. and M.E.A.; writing—review and editing, all authors; visualization, B.K.A.; supervision, M.E.A.;
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funding acquisition, M.E.A. All authors have read and agreed to the published version of the manuscript.
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Funding: This study has been supported primarily by funding from the South Florida Water Management District
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to M.E.A. with additional support from NSF DEB-1922521 to M.E.A. and the NSF Graduate Research Fellowship
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Program to B.K.A.
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Acknowledgments: We thank D. Hernandez, K. Kiesewetter, D. Revillini, C. Searcy, C. Mothes, H. Howell,
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and S. Clements for feedback on this manuscript and J. Richards, J. Orias, K. Maravillas and K. Nguyen for
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assistance with field sample and data collections. We also acknowledge the South Florida Water Management
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District for access to DBHydro.
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Conflicts of Interest: The authors declare no conflict of interest.
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