Topographic and biotic regulation of aboveground carbon storage in subtropical broad-leaved forests of Taiwan

There is a growing need to understand, and ultimately manage, carbon storage by forest ecosystems. Broad-leaved evergreen forests of Taiwan provide an outstanding opportunity to examine factors that regulate ecosystem carbon storage. We utilized data from three Taiwan Forest Dynamics Plots (FS, LHC, and PTY) in which every tree is identified, measured, tagged and mapped, to examine factors regulating carbon storage as estimated from aboveground biomass. Allometric equations were used to estimate the aboveground biomass of each tree, and a model building procedure was used to examine relationships between plot-level aboveground biomass (AGB; Mg/ha) and a suite of topographic and biotic factors. We found that our study sites have AGB values comparable to some of the most carbon dense forests in the world. Across all three sites, maximum biomass was contained in the taxonomic families Fagaceae, Lauraceae and Theaceae. In the FS site, we identified slope convexity (P = 0.03) and elevation (P < 0.001) as topographic predictors of AGB and found that maximum AGB was found in topographically flat areas. In FS, stem density (P < 0.001) was a significant biotic predictor of AGB and the maxima occurred at intermediate densities. In LHC, we found that convexity (P < 0.001) and slope (P < 0.001) were significantly related to AGB which was maximized along a topographic ridge in the plot. Species richness (P < 0.001) was a significant biotic predictor of AGB in LHC, and the relationship indicated slightly higher AGB at higher levels of species richness. The only significant factor related to AGB in PTY was species richness (P = 0.02). Further work is needed to seek a mechanistic understanding of topographic factors and species richness as drivers of carbon storage in forests.

[1]  J. Oksanen.  Is the humped relationship between species richness and biomass an artefact due to plot size , 1996 .

[2]  Taro Takahashi,et al.  Constraints on the Global Atmospheric CO 2 Budget , 2007 .

[3]  D. Tilman,et al.  Ecological mechanisms associated with the positive diversity-productivity relationship in an N-limited grassland. , 2009, Ecology.

[4]  T. Nakashizuka,et al.  Architectural differences associated with adult stature and wood density in 30 temperate tree species , 2008 .

[5]  J. Stachowicz,et al.  BIODIVERSITY, INVASION RESISTANCE, AND MARINE ECOSYSTEM FUNCTION: RECONCILING PATTERN AND PROCESS , 2002 .

[6]  R. Condit,et al.  Tree species distributions and local habitat variation in the Amazon: large forest plot in eastern Ecuador , 2004 .

[7]  Brian J Enquist,et al.  Ecological and evolutionary determinants of a key plant functional trait: wood density and its community-wide variation across latitude and elevation. , 2007, American journal of botany.

[8]  D. Moorhead,et al.  Effects of timber harvest on carbon pools in Ozark forests , 2007 .

[9]  A. Di Fiore,et al.  Variation in wood density determines spatial patterns inAmazonian forest biomass , 2004 .

[10]  Sandra A. Brown,et al.  Spatial distribution of biomass in forests of the eastern USA , 1999 .

[11]  G. C. Packard,et al.  Allometric equations for predicting body mass of dinosaurs , 2009 .

[12]  Corinne Le Quéré,et al.  Climate Change 2013: The Physical Science Basis , 2013 .

[13]  Maosheng Zhao,et al.  A Continuous Satellite-Derived Measure of Global Terrestrial Primary Production , 2004 .

[14]  Luiz Antonio Martinelli,et al.  Forest structure and carbon dynamics in Amazonian tropical rain forests , 2004, Oecologia.

[15]  Steven W. Running,et al.  Ecosystem Disturbance, Carbon, and Climate , 2008, Science.

[16]  Kurt S. Pregitzer,et al.  Carbon cycling and storage in world forests: biome patterns related to forest age , 2004 .

[17]  Martin Heimann,et al.  Global and hemispheric CO2 sinks deduced from changes in atmospheric O2 concentration , 1996, Nature.

[18]  S. Hamburg,et al.  Typhoon effects on litterfall in a subtropical forest , 2003 .

[19]  R. McEwan,et al.  Spatial and temporal dynamics in canopy dominance of an old-growth central Appalachian forest , 2006 .

[20]  P. Ciais,et al.  Old-growth forests as global carbon sinks , 2008, Nature.

[21]  Steven P. Hamburg,et al.  Typhoon Disturbance and Stand‐level Damage Patterns at a Subtropical Forest in Taiwan 1 , 1998 .

[22]  Richard Condit,et al.  Tropical Forest Census Plots: Methods and Results from Barro Colorado Island, Panama and a Comparison with Other Plots , 1998 .

[23]  Catherine Potvin,et al.  Variation in carbon storage among tree species: Implications for the management of a small-scale carbon sink project , 2007 .

[24]  Michael W. Palace,et al.  CARBON BALANCE AND VEGETATION DYNAMICS IN AN OLD-GROWTH AMAZONIAN FOREST , 2004 .

[25]  S. Hamburg,et al.  Typhoon Disturbance and Forest Dynamics: Lessons from a Northwest Pacific Subtropical Forest , 2010, Ecosystems.

[26]  Robert K. Colwell,et al.  Species Loss and Aboveground Carbon Storage in a Tropical Forest , 2005, Science.

[27]  I. Fung,et al.  Observational Contrains on the Global Atmospheric Co2 Budget , 1990, Science.

[28]  J. Chave,et al.  Towards a Worldwide Wood Economics Spectrum 2 . L E a D I N G D I M E N S I O N S I N W O O D F U N C T I O N , 2022 .

[29]  David B. Lindenmayer,et al.  Re-evaluation of forest biomass carbon stocks and lessons from the world's most carbon-dense forests , 2009, Proceedings of the National Academy of Sciences.

[30]  Stephen P. Hubbell,et al.  Habitat associations of trees and shrubs in a 50‐ha neotropical forest plot , 2001 .

[31]  Jerry F. Franklin,et al.  Spatial Relationship of Biomass and Species Distribution in an Old-Growth Pseudotsuga-Tsuga Forest , 2004, Forest Science.

[32]  H. L. Miller,et al.  Climate Change 2007: The Physical Science Basis , 2007 .

[33]  P. Brussard.  The Greater Yellowstone Ecosystem , 1991 .

[34]  William L. Goffe,et al.  SIMANN: FORTRAN module to perform Global Optimization of Statistical Functions with Simulated Annealing , 1992 .

[35]  S. Hamburg,et al.  Forest carbon storage: ecology, management, and policy , 2010 .

[36]  Alan R. Ek,et al.  Process-based models for forest ecosystem management: current state of the art and challenges for practical implementation. , 2000, Tree physiology.

[37]  D. Brown,et al.  Spatial patterns of primary productivity in the Greater Yellowstone Ecosystem , 2000, Landscape Ecology.

[38]  Peter E. Thornton,et al.  Modeling and measuring the effects of disturbance history and climate on carbon and water budgets in evergreen needleleaf forests , 2002 .

[39]  J. Slik,et al.  Soil nutrients affect spatial patterns of aboveground biomass and emergent tree density in southwestern Borneo , 2008, Oecologia.

[40]  J. Mascaro,et al.  Aboveground Biomass Accumulation in a Tropical Wet Forest in Nicaragua Following a Catastrophic Hurricane Disturbance 1 , 2005 .

[41]  James B. Grace,et al.  The factors controlling species density in herbaceous plant communities: an assessment , 1999 .

[42]  Randall K. Kolka,et al.  Carbon pools and productivity in a 1-km2 heterogeneous forest and peatland mosaic in Minnesota, USA , 2009 .

[43]  N. Higuchi,et al.  Variation in aboveground tree live biomass in a central Amazonian Forest: Effects of soil and topography , 2006 .

[44]  E. Leigh,et al.  Tropical forest diversity and dynamism : findings from a large-scale plot network , 2004 .

[45]  Robert H. Whittaker,et al.  Vegetation of the Great Smoky Mountains , 1956 .

[46]  H. Muller‐Landau,et al.  Dissecting biomass dynamics in a large Amazonian forest plot , 2009, Journal of Tropical Ecology.

[47]  S. Solomon.  The Physical Science Basis : Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change , 2007 .

[48]  Sean C. Thomas,et al.  Increasing carbon storage in intact African tropical forests , 2009, Nature.

[49]  J. Chambers,et al.  Tree allometry and improved estimation of carbon stocks and balance in tropical forests , 2005, Oecologia.

[50]  J. Aber,et al.  A generalized, lumped-parameter model of photosynthesis, evapotranspiration and net primary production in temperate and boreal forest ecosystems , 1992, Oecologia.

[51]  William L. Goffe,et al.  Global Optimization of Statistical Functions: Preliminary Results , 1992 .

[52]  Daniel A. Yaussy,et al.  The effects of prescribed fire and silvicultural thinning on the aboveground carbon stocks and net primary production of overstory trees in an oak-hickory ecosystem in southern Ohio , 2008 .

[53]  Carol A. Gotway,et al.  Statistical Methods for Spatial Data Analysis , 2004 .

[54]  T. Lin,et al.  Fushan Subtropical Forest Dynamics Plot: Tree Species Characteristics and Distribution Patterns , 2007 .

[55]  J. P. Grime,et al.  Competitive Exclusion in Herbaceous Vegetation , 1973, Nature.

[56]  M. Huston.  A General Hypothesis of Species Diversity , 1979, The American Naturalist.

[57]  J. Stedinger,et al.  The use of GLS regression in regional hydrologic analyses , 2007 .