Low fertility also makes soils undesirable for agriculture and native vegetation has, therefore, remained relatively intact. Plants grow slowly in nutrient-deficient conditions and some species have developed symbiotic relationships with nutrient-fixing bacteria and fungi to enhance nutrient availability. Others have root systems that increase the efficiency of nutrient uptake.
Bushfires play a vital role in regeneration of dry sclerophyll forests. Many species are able to resprout from buds protected beneath soils or within the trunk or branches. Other species have seeds that are protected by a hard seed-coat or woody fruit, which are stimulated to open or germinate by fire. The frequency, intensity, season of occurrence of fire (‘fire regime’) has an enormous effect on the composition and structure of these forests.
This post is part of the Friday Greens meme,
and also part of the Skywatch Friday meme.