TAILIEUCHUNG - Springer Old Growth Forests - Chapter 6

Chapter 6 Functional Relationships Between Old-Growth Forest Canopies, Understorey Light and Vegetation Dynamics Christian Messier, Juan Posada, Isabelle Aubin, and Marilou Beaudet Old-growth forests are characterised by the presence of old trees (200 years of age), considerable amounts of large pieces of dead wood and a complex horizontal and vertical structure | Chapter 6 Functional Relationships Between Old-Growth Forest Canopies Understorey Light and Vegetation Dynamics Christian Messier Juan Posada Isabelle Aubin and Marilou Beaudet Introduction Old-growth forests are characterised by the presence of old trees 200 years of age considerable amounts of large pieces of dead wood and a complex horizontal and vertical structure see Chap. 2 by Wirth et al. this volume . These three elements create a unique understorey environment including light that differs somewhat from earlier successional or second-growth . forests that have regrown following harvesting forests. Identifying factors that influence variation in light availability within forested ecosystems represents an important component in our understanding of the complex determinants of understorey vegetation dynamics. Based on an extensive review of the literature on old-growth forests in boreal temperate and tropical biomes this chapter discusses 1 the distinct structural and compositional features that are likely to influence the understorey light environment in old-growth forests 2 the particular understorey light conditions found under such forests and 3 the unique understorey vegetation assemblage that can develop in old-growth forests. We focus as much as possible on shared trends among all three biomes but we also discuss some of the fundamental differences that differentiate them. Comparisons with second-growth forests are also often made to highlight the uniqueness of old-growth forests. Structural and Compositional Features of Old-Growth Old-growth forests possess distinct structural and compositional features that influence understorey light environment and vegetation growth and dynamics Chap. 2 by Wirth et al. this volume . Since such forests are generally found where small-scale disturbances predominate their disturbance regime tends to be characterised by gap dynamics see Chaps. 2 Wirth et al. 10 Bauhus 13 Grace and Meir and 19 Frank et al. .

• Lâm nghiệp
• kĩ thuật trồng trọt
• kĩ thuật trồng rừng
• tài nguyên rừng
• rừng già nhiệt đới
• khai thác và bảo vệ rừng
• kỹ thuật trồng trọt
• thắc mắc về trồng trọt
• tài liệu trồng trọt
• phương pháp trồng cây
• kĩ thuật chăm sóc hoa
• giáo trình trồng trọt
• kĩ thuật nhân giống hoa
• tài liệu trồng hoa
• Giáo trình nông nghiệp
• kinh nghiệm trồng trọt
• kỹ năng nuôi trồng
• tài liệu nuôi trồng
• kỹ thuật gieo giống
• bệnh hại cây trống
• bệnh hại cây trồng
• kiến thức nhà nông
• kiến thức trồng trọt
• kĩ thuật trồng lạc
• trồng lạc có che phủ nilon
• công nghệ thâm canh
• thời vụ gieo trồng
• kĩ thuật canh tác
• chăm sóc cây trồng
• cải tạo đất
• Kỹ Thuật Trồng đậu tương
• Cây Đậu Tương
• Phạm Văn Thiều
• kĩ thuật chăn nuôi
• lợi ích của đậu tương
• Kỹ thuật trồng và chăm sóc cây nhãn
• Trần Thế Tục
• Kỹ thuật trồng nhãn
• chăm sóc cây nhãn
• lợi ích cây nhãn
• cáh trồng rau mầm
• Tài liệu nghiệp
• Trồng trọt
• Trồng Rau
• Rau trái vụ
• Rau mầm