Epiphytes, including lichens, bryophytes, ferns and spermatophytes, are a large and widely distributed group across many forest ecosystems. Acquiring enough nitrogen (N) to support their life processes in nutrient-poor canopies is a crucial challenge for epiphytes.
N and N of epiphytes, reflecting differences in N acquisition, uptake and utilization strategies among different groups.
"Atmospheric or within-canopy-derived N was more important than soil-derived N for epiphyte growth," said Li Su from XTBG, corresponding author of the study.N enrichment factors confirmed the involvement of various N sources in nutrients of epiphytes, leading to differentiation in N utilization among different epiphyte groups. Cyanolichens mainly acquired N through N-fixation, while chlorolichens relied more on rainwater N.
"Our study has shed light on differentiation in N sources of co-occurring epiphytes in Chinese subtropical forests and this could be one of the most important reasons for the survival of abundant epiphytes within nutrient-poor canopies," said Li.Tian-Hao Su et al, Greater differentiation in nitrogen sources is essential for co-occurring epiphytes under low-nitrogen canopy conditions,
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