Complex sentence: In the case of eggs dying by asphyxiation, if they are buried deep enough insects are unlikely to scavenge them; however, even in the absence of insects, fungi, bacteria, and other microscopic life participate in decomposition.
Split into simpler sentences: In the case of eggs dying by asphyxiation if they're buried deep enough insects are unlikely to scavenge them. However, even in the absence of insects, fungi, bacteria, and other microscopic life participate in decomposition.