Distribution and sporulation phenology of pteridophytes in Lagos state, Nigeria
Peter Adegbenga Adeonipekun, Oyetola Oyebanji, Michael Babatunde Adebayo, Oluwaseun Sunday Bamigbade
The importance of pteridophytes in past and present ecological, environmental and climate monitoring and aerobiology cannot be over-emphasized. Therefore, to provide phenological information on this plant group, a one-year (September 2016 – August 2017) documentation on the floristic composition and sporulation features of pteridophytes in four areas across Lagos State, Nigeria was effectuated using opportunistic sampling method. A total of 11 species belonging to 11 genera and seven families were documented. The richest family was Pteridaceae (four species) and are mostly terrestrial. Statistical analysis revealed positive correlations between: (i) average temperature and sporulation in A. aureum, C. cornuta and P. scolopendria in Badagry, (ii) temperature and sporulation in L. microphyllum in Epe, (iii)temperature and relative humidity and sporulation in N. biserrata in Ikorodu and (iv) relative humidity and sporulation in D. marginalis inIkorodu. None of the species encountered was endangered, threatened or vulnerable. Some species sporulated across all sampled locations in some particular months, suggesting that these months represent their peak sporulation period. Based on the sporulation calendar created, we infer that pteridophytes in Lagos State sporulate mostly between the months of April and July. The microenvironment played major roles in the sporulation of all recorded pteridophytes with relative humidity, temperature and rainfall being the determinant meteorological factors.