Tropical forest dynamics in unstable terrain: a case study from New Guinea

0493575 - BC 2019 RIV US eng J - Článek v odborném periodiku
Vincent, J. B. - Turner, B. L. - Alok, C. - Novotný, Vojtěch - Weiblen, G. D. - Whitfeld, T. J. S.
Tropical forest dynamics in unstable terrain: a case study from New Guinea.
Journal of Tropical Ecology. Roč. 34, č. 3 (2018), s. 157-175. ISSN 0266-4674. E-ISSN 1469-7831
Grant ostatní: GA ČR(CZ) GA16-18022S
Institucionální podpora: RVO:60077344
Klíčová slova: diversity * lowland rain forest * mortality
Obor OECD: Ecology
Impakt faktor: 1.194, rok: 2018

Long-term forest dynamics plots in the tropics tend to be situated on stable terrain. This study investigated forest dynamics on the north coast of New Guinea where active subduction zones are uplifting lowland basins and exposing relatively young sediments to rapid weathering. We examined forest dynamics in relation to disturbance history, topography and soil nutrients based on partial re-census of the 50-ha Wanang Forest Dynamics Plot in Papua New Guinea. The plot is relatively high in cations and phosphorus but low in nitrogen. Soil nutrients and topography accounted for 29% of variation in species composition but only 4% of variation in basal area. There were few areas of high biomass and most of the forest was comprised of small-diameter stems. Approximately 18% of the forest was less than 30 y old and the annual tree mortality rate of nearly 4% was higher than in other tropical forests in South-East Asia and the neotropics. These results support the reputation of New Guinea's forests as highly dynamic, with frequent natural disturbance. Empirical documentation of this hypothesis expands our understanding of tropical forest dynamics and suggests that geomorphology might be incorporated in models of global carbon storage especially in regions of unstable terrain.
Trvalý link: http://hdl.handle.net/11104/0286953