Complex sentence: It is hard to quantify how the different forests affect different species of fungi, but preliminary studies with the lichens and bryophytes indicate that obvious differences also occur among the three rainforest groups with respect to non-vascular flora (2).
Split into simpler sentences: It is hard to quantify how the different forests affect different species of fungi. Preliminary studies with the lichens and bryophytes indicate that obvious differences also occur among the three rainforest groups with respect to non-vascular flora (2).