21. A pioneer species , it regenerates quickly in disturbed habitats such as logged forest and previously-cultivated land. 22. These spores grow and form symbiotic association, the lichen, which act as pioneer species of bare rocks. 23. This shrub is a pioneer species that can sometimes be found in disturbed habitat such as roadsides. 24. However, as with many pioneer species , the seeds of the bleeding heart have a long dormancy period. 25. First to advance were woody pioneer species that were quick to spread, such as birch and pine. 26. It is an important pioneer species which colonises coastal dunes, binding loose sand with its horizontal runners. 27. For example, spores of lichen or fungus, being the pioneer species , are spread onto a land of rocks. 28. Secondary succession in the tropics begins with pioneer species , which are rapidly growing and include vines and shrubs. 29. It is a pioneer species that easily fills forest clearings, and it has been considered for reforestation efforts. 30. The plant is undemanding and frost hardy and colonizes disrupted and inaccessible places as a short-lived pioneer species .
