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