@Article{taiwania2020653336,
AUTHOR = {Kelzang Gayley, Kitichate Sridith},
TITLE = {The vegetation status of regrowth forests in abandoned farmlands in the subtropical forest of Eastern Bhutan Himalaya},
JOURNAL = {Taiwania},
VOLUME = {65},
YEAR = {2020},
ISSUE = {3},
PAGES = {336-347},
URL = {https://taiwania.ntu.edu.tw/abstract/1692},
ABSTRACT = {Many regrowth forests have occurred in abandoned farmlands all over the world. The regrowth forests of 20‒60 years old on abandoned farmlands and old-growth forests in a subtropical forest of Eastern Bhutan Himalaya are studied and their floristic and structural compositions are compared. A total of 64 and 43 plots were sampled in regrowth forests and old-growth forests respectively based on stratified random sampling method. Species richness of woody plants and predominant ground covers in regrowth forests is lower than old-growth forests though few of them show higher species richness in woody stems. Species composition of trees (≥5cm DBH) in younger regrowth forests (<30 yrs.) and older regrowth forests (>30 yrs.) show 10% and 42‒51% of Bray Curtis similarity to their adjacent old-growth forests respectively. A total of 53% of trees and 63% of large saplings/shrubs (≤4cm DBH and ≥1m height) are shared species between two forest types. The top dominant species such as Betula alnoides Buch.-Ham. ex D.Don, Lithocarpus fenestratus (Roxb.) Rehder, Schima wallichi Choisy, and Itoa oreintalis Hemsl. in regrowth forests make distinct patches different from old-growth forests. Species composition of trees in regrowth forests retains the variation along the elevation gradient like old-growth forests. Land-use history of the regrowth forests has also affected the regeneration of forest. Basal area and density of trees in regrowth forests are close or even higher than old-growth forests. The regrowth forests reveal robust recovery of old-growth species and growth of unique species.},
DOI = {10.6165/tai.2020.65.336}
}