A litter-manipulation experiment in a Colombian mangrove found that the fern Acrostichum aureum contributes meaningfully to sediment organic matter, but five months wasn't long enough for its removal to shift the communities of crabs, molluscs, and worms living in the mud.
1
Sediment organic matter increased in plots receiving fern litter inputs and stayed lower in fern-exclusion plots by March 2017, confirming a measurable fern contribution.
2
Macrofaunal species composition (crabs, molluscs, polychaetes) showed no significant difference among treatments after five months of litter manipulation.
3
Multivariate sediment properties differed significantly among treatments, but organic carbon alone showed no significant treatment effect over the experimental period.
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