Landscape‐scale patterns in tree occupancy and abundance in subarctic Alaska

Recent studies suggest that climate warming in interior Alaska may result in major shifts from spruce-dominated forests to broadleaf-dominated forests or even grasslands. To quantify patterns in tree distribution and abundance and to investigate the potential for changes in forest dynamics through time, we initiated a spatially extensive vegetation monitoring program covering 1.28 million ha in Denali National Park and Preserve (DNPP). Using a probabilistic sampling design, we collected field measurements throughout the study area to develop spatially explicit Bayesian hierarchical models of tree occupancy and abundance. These models demonstrated a strong partitioning of the landscape among the six tree species in DNPP, and allowed us to account for and examine residual spatial autocorrelation in our data. Tree distributions were governed by two primary ecological gradients: (1) the gradient from low elevation, poorly drained, permafrost-influenced sites with shallow active layers and low soil pH (dominat...

[1]  Leslie A. Viereck,et al.  Characteristics of treeline plant communities in Alaska , 2010 .

[2]  Leslie A. Viereck,et al.  Taiga Ecosystems in Interior Alaska , 1983 .

[3]  Mikhail Kanevskiy,et al.  Physical and ecological changes associated with warming permafrost and thermokarst in Interior Alaska , 2009 .

[4]  A. McGuire,et al.  Topographic influences on wildfire consumption of soil organic carbon in interior Alaska: Implications for black carbon accumulation , 2007 .

[5]  F. Stuart Chapin,et al.  Response of subarctic vegetation to transient climatic change on the Seward Peninsula in north‐west Alaska , 2000 .

[6]  F. S. Chapin,et al.  Fire Interval Effects on Successional Trajectory in Boreal Forests of Northwest Canada , 2006, Ecosystems.

[7]  Bruce P. Finney,et al.  Reduced growth of Alaskan white spruce in the twentieth century from temperature-induced drought stress , 2000, Nature.

[8]  A. Robinson,et al.  Critical period of interspecific competition for four northern conifers: 10-year growth response and associated vegetation dynamics , 2006 .

[9]  A. Lloyd,et al.  Fire and substrate interact to control the northern range limit of black spruce (Picea mariana) in Alaska , 2007 .

[10]  A. Lloyd,et al.  ECOLOGICAL HISTORIES FROM ALASKAN TREE LINES PROVIDE INSIGHT INTO FUTURE CHANGE , 2005 .

[11]  Lindsay A. Turnbull,et al.  Seed mass and the competition/colonization trade‐off: a sowing experiment , 1999 .

[12]  S. Gower,et al.  Ecosystem warming does not affect photosynthesis or aboveground autotrophic respiration for boreal black spruce. , 2010, Tree physiology.

[13]  R. Werner.  Biomass, density, and nutrient content of plant arthropods in the taiga of Alaska , 1983 .

[14]  D. Cooper.  White Spruce above and Beyond Treeline in the Arrigetch Peaks Region, Brooks Range, Alaska , 1986 .

[15]  M. Chytrý,et al.  Bias in vegetation databases? A comparison of stratified-random and preferential sampling. , 2011 .

[16]  R. Itami,et al.  GIS-based habitat modeling using logistic multiple regression : a study of the Mt. Graham red squirrel , 1991 .

[17]  E. Johnson,et al.  Accurately ageing trees and examining their height‐growth rates: implications for interpreting forest dynamics , 2002 .

[18]  D. Arseneault.  Impact of fire behavior on postfire forest development in a homogeneous boreal landscape , 2001 .

[19]  A. McGuire,et al.  Alaska's Changing Fire Regime - Implications for the Vulnerability of Its Boreal Forests , 2010 .

[20]  Melanie A. Harsch,et al.  Are treelines advancing? A global meta-analysis of treeline response to climate warming. , 2009, Ecology letters.

[21]  E. Kasischke,et al.  Analysis of the patterns of large fires in the boreal forest region of Alaska , 2002 .

[22]  Edward B. Rastetter,et al.  Arctic and boreal ecosystems of western North America as components of the climate system , 2000, Global change biology.

[23]  Martin Wilmking,et al.  Longitudinal variation of radial growth at Alaska's northern treeline—recent changes and possible scenarios for the 21st century , 2005 .

[24]  R. O’Brien,et al.  A Caution Regarding Rules of Thumb for Variance Inflation Factors , 2007 .

[25]  Alan K. Betts,et al.  Albedo over the boreal forest , 1997 .

[26]  O. Loucks,et al.  From Balance of Nature to Hierarchical Patch Dynamics: A Paradigm Shift in Ecology , 1995, The Quarterly Review of Biology.

[27]  Claire Alix,et al.  Changes in forest productivity across Alaska consistent with biome shift. , 2011, Ecology letters.

[28]  A. Youngblood.  Development patterns in young conifer-hardwood forests of interior Alaska , 1995 .

[29]  F. Chapin,et al.  Scale-dependent environmental controls over species composition in Alaskan black spruce communities , 2006 .

[30]  J. Yarie,et al.  Forest fire cycles and life tables: a case study from interior Alaska , 1981 .

[31]  Eric S. Kasischke,et al.  Resilience of Alaska's Boreal Forest to Climatic Change , 2010 .

[32]  Dan Binkley,et al.  Expansion of forest stands into tundra in the Noatak National Preserve, northwest Alaska , 1999 .

[33]  B. Sveinbjörnsson,et al.  Microtopographic Control of Treeline Advance in Noatak National Preserve, Northwest Alaska , 2010, Ecosystems.

[34]  J. Berger,et al.  Objective Bayesian Analysis of Spatially Correlated Data , 2001 .

[35]  A. Starfield,et al.  Patterns and dynamics of treeline advance on the Seward Peninsula, Alaska , 2002 .

[36]  A. Lloyd,et al.  Recent changes in treeline forest distribution and structure in interior Alaska , 2003 .

[37]  David S. Hik,et al.  Responses of white spruce (Picea glauca) to experimental warming at a subarctic alpine treeline , 2007 .

[38]  A. Lloyd,et al.  Fire history and postfire forest development in an upland watershed of interior Alaska , 2002 .

[39]  T. Osterkamp.  The recent warming of permafrost in Alaska , 2005 .

[40]  R. Fleming,et al.  Climate change and impacts of boreal forest insects , 2000 .

[41]  F. Stuart Chapin,et al.  Effects of Soil Burn Severity on Post-Fire Tree Recruitment in Boreal Forest , 2006, Ecosystems.

[42]  Ralph Dubayah,et al.  Topographic Solar Radiation Models for GIS , 1995, Int. J. Geogr. Inf. Sci..

[43]  F. Chapin,et al.  Evidence and Implications of Recent Climate Change in Northern Alaska and Other Arctic Regions , 2004 .

[44]  F. Stuart Chapin,et al.  Changes in fire regime break the legacy lock on successional trajectories in Alaskan boreal forest , 2010 .

[45]  Eric S. Kasischke,et al.  Persistent Effects of Fire Severity on Early Successional Forests in Interior Alaska , 2011 .

[46]  C. T. Dyrness,et al.  An overview of the vegetation and soils of the floodplain ecosystems of the Tanana River, interior Alaska , 1993 .

[47]  David L. Verbyla,et al.  Relative importance of different secondary successional pathways in an Alaskan boreal forest , 2008 .

[48]  F. Stuart Chapin,et al.  Fire, climate change, and forest resilience in interior Alaska. , 2010 .

[49]  D. Greene,et al.  The reduction of organic-layer depth by wildfire in the North American boreal forest and its effect on tree recruitment by seed , 2007 .

[50]  S. Macdonald,et al.  Responses of black spruce (Picea mariana) and tamarack (Larix laricina) to flooding and ethylene. , 2003, Tree physiology.

[51]  C. T. Dyrness,et al.  The effect of wildfire on soil chemistry in four forest types in interior Alaska , 1989 .

[52]  A. McGuire,et al.  Potential shifts in dominant forest cover in interior Alaska driven by variations in fire severity. , 2011, Ecological applications : a publication of the Ecological Society of America.

[53]  A. Lloyd,et al.  Spatial and Temporal Variability in the Growth and Climate Response of Treeline Trees in Alaska , 2002 .

[54]  M. Turner,et al.  WINTER HABITAT USE BY LARGE UNGULATES FOLLOWING FIRE IN NORTHERN YELLOWSTONE NATIONAL PARK , 1995 .

[55]  A. McGuire,et al.  Vulnerability of white spruce tree growth in interior Alaska in response to climate variability: dendrochronological, demographic, and experimental perspectives , 2010 .

[56]  M. Westoby,et al.  Comparative ecology of seed size and dispersal , 1996 .

[57]  D. Mann,et al.  Vegetation and soil development at an upland taiga site, Alaska , 1999 .

[58]  E. Kasischke,et al.  Effects of trees on the burning of organic layers on permafrost terrain , 2012 .

[59]  A. Hofgaard,et al.  Does Soil Organic Layer Thickness Affect Climate–Growth Relationships in the Black Spruce Boreal Ecosystem? , 2010, Ecosystems.

[60]  Kirk M. Stueve,et al.  Spatial variability of biotic and abiotic tree establishment constraints across a treeline ecotone in the Alaska range. , 2011, Ecology.

[61]  David W. Kicklighter,et al.  Equilibrium Responses of Soil Carbon to Climate Change: Empirical and Process-Based Estimates , 1995 .

[62]  F. Stuart Chapin,et al.  THE RESPONSE OF TUNDRA PLANT BIOMASS, ABOVEGROUND PRODUCTION, NITROGEN, AND CO2 FLUX TO EXPERIMENTAL WARMING , 1998 .

[63]  Mark G. Tjoelker,et al.  Close association of RGR, leaf and root morphology, seed mass and shade tolerance in seedlings of nine boreal tree species grown in high and low light , 1998 .

[64]  V. Lieffers,et al.  Climate and annual ring growth of black spruce in some Alberta peatlands , 1989 .

[65]  Brian D. Ripley,et al.  geoRglm: A Package for Generalised Linear Spatial Models , 2002 .

[66]  J. Schieck,et al.  Changes in bird communities throughout succession following fire and harvest in boreal forests of western North America: literature review and meta-analyses , 2006 .

[67]  L. Hermanutz,et al.  Postfire seedling recruitment at the southern limit of lichen woodland , 2009 .

[68]  Gordon B. Bonan,et al.  Soil temperature, nitrogen mineralization, and carbon source–sink relationships in boreal forests , 1992 .

[69]  K. Cleve,et al.  Nutrient cycling in relation to decomposition and organic-matter quality in taiga ecosystems , 1983 .

[70]  Leslie A. Viereck,et al.  Vegetation, soils, and forest productivity in selected forest types in interior Alaska , 1983 .

[71]  J. Dushoff,et al.  WHITE SPRUCE MEETS BLACK SPRUCE: DISPERSAL, POSTFIRE ESTABLISHMENT, AND GROWTH IN A WARMING CLIMATE , 2008 .

[72]  Richard A. Werner,et al.  Spruce beetles and forest ecosystems in south-central alaska : A review of 30 years of research , 2006 .

[73]  J. Yarie,et al.  Long-term monitoring of climatic and nutritional affects on tree growth in interior Alaska , 2010 .

[74]  K. Gross.  Effects of seed size and growth form on seedling establishment of six monocarpic perennial plants , 1984 .

[75]  S. Whisenant,et al.  Seedbed filter controls post-fire succession , 2010 .

[76]  L. C. Bliss,et al.  Reproductive Ecology of Picea Mariana (Mill.) BSP., at Tree Line Near Inuvik, Northwest Territories, Canada , 1980 .

[77]  J. Yarie,et al.  Carbon balance of the taiga forest within Alaska: present and future , 2002 .

[78]  Vladimir E. Romanovsky,et al.  Evidence for warming and thawing of discontinuous permafrost in Alaska , 1999 .

[79]  Christopher B. Field,et al.  Changing feedbacks in the climate–biosphere system , 2008 .

[80]  J. Bockheim,et al.  Factors Affecting the Distribution of Populus balsamifera on the North Slope of Alaska, U.S.A , 2003 .

[81]  Jonathan M. Chase,et al.  A synthesis of plant invasion effects on biodiversity across spatial scales. , 2011, American journal of botany.

[82]  F. Bigras.  Photosynthetic response of white spruce families to drought stress , 2005, New Forests.