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Reikowski ES, Refsland T, Cushman JH. Ungulate herbivores as drivers of aspen recruitment and understory composition throughout arid montane landscapes. Ecosphere 2022. [DOI: 10.1002/ecs2.4225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022] Open
Affiliation(s)
- Elizabeth S. Reikowski
- Department of Natural Resources and Environmental Science University of Nevada Reno Nevada USA
| | - Tyler Refsland
- Department of Plant, Soil and Microbial Sciences Michigan State University East Lansing Michigan USA
| | - J. Hall Cushman
- Department of Natural Resources and Environmental Science University of Nevada Reno Nevada USA
- Program in Ecology, Evolution, and Conservation Biology University of Nevada Reno Nevada USA
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2
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Robust Satellite-Based Identification and Monitoring of Forests Having Undergone Climate-Change-Related Stress. LAND 2022. [DOI: 10.3390/land11060825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Climate-induced drought events are responsible for forest decline and mortality in different areas of the world. Forest response to drought stress periods may be different, in time and space, depending on vegetation type and local factors. Stress analysis may be carried out by using field methods, but the use of remote sensing may be needed to highlight the effects of climate-change-induced phenomena at a larger spatial and temporal scale. In this context, satellite-based analyses are presented in this work to evaluate the drought effects during the 2000s and the possible climatological forcing over oak forests in Southern Italy. To this aim, two approaches based on the well-known Normalized Difference Vegetation Index (NDVI) were used: one based on NDVI values, averaged over selected decaying and non-decaying forests; another based on the Robust Satellite Techniques (RST). The analysis of the first approach mainly gave us overall information about 1984–2011 rising NDVI trends, despite a general decrease around the 2000s. The second, more refined approach was able to highlight a different drought stress impact over decaying and non-decaying forests. The combined use of the RST-based approach, Landsat satellite data, and Google Earth Engine (GEE) platform allowed us to identify in space domain and monitor over time significant oak forest changes and climate-driven effects (e.g., in 2001) from the local to the Basilicata region scale. By this way, the decaying status of the Gorgoglione forest was highlighted two years before the first visual field evidence (e.g., dryness of apical branches, bark detachment, root rot disease). The RST exportability to different satellite sensors and vegetation types, the availability of suitable satellite data, and the potential of GEE suggest the possibility of long-term monitoring of forest health, from the local to the global scale, to provide useful information to different end-user classes.
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3
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Searle EB, Chen HYH, Paquette A. Higher tree diversity is linked to higher tree mortality. Proc Natl Acad Sci U S A 2022; 119:e2013171119. [PMID: 35500110 PMCID: PMC9171344 DOI: 10.1073/pnas.2013171119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 03/11/2022] [Indexed: 11/23/2022] Open
Abstract
Examining the relationship between tree diversity and ecosystem functioning has been a recent focus of forest ecology. Particular emphasis has been given to the impact of tree diversity on productivity and to its potential to mitigate negative global change effects; however, little attention has been paid to tree mortality. This is critical because both tree mortality and productivity underpin forest ecosystem dynamics and therefore forest carbon sequestration. Neglecting tree mortality leaves a large part of the picture undocumented. Here we show that increasingly diverse forest stands have increasingly high mortality probabilities. We found that the most species-rich stands in temperate biomes had mortality probabilities more than sevenfold higher than monospecific stands (∼0.6% year−1 in monospecific stands to 4.0% year−1 in the most species-rich stands) while in boreal stands increases were less pronounced but still significant (∼1.1% year−1 in monospecific stands to 1.8% year−1 in the most species-rich stands). Tree species richness was the third-most-important predictor of mortality in our models in temperate forests and the fifth-most-important predictor in boreal forests. Our results highlight that while the promotion of tree diversity undoubtedly has many positive effects on ecosystem functioning and the services that trees provide to humanity, it remains important to consider all aspects of forest dynamics in order to properly predict the implications of maintaining and promoting tree diversity.
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Affiliation(s)
- Eric B. Searle
- Département des sciences biologiques, Centre for Forest Research, Université du Québec à Montréal, CP 8888, Succursale Centre-ville, Montréal, QC, Canada H3C 3P8
| | - Han Y. H. Chen
- Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada P7B 5E1
| | - Alain Paquette
- Département des sciences biologiques, Centre for Forest Research, Université du Québec à Montréal, CP 8888, Succursale Centre-ville, Montréal, QC, Canada H3C 3P8
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4
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Yu K, Ciais P, Seneviratne SI, Liu Z, Chen HYH, Barichivich J, Allen CD, Yang H, Huang Y, Ballantyne AP. Field-based tree mortality constraint reduces estimates of model-projected forest carbon sinks. Nat Commun 2022; 13:2094. [PMID: 35440564 PMCID: PMC9018757 DOI: 10.1038/s41467-022-29619-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 03/18/2022] [Indexed: 11/11/2022] Open
Abstract
Considerable uncertainty and debate exist in projecting the future capacity of forests to sequester atmospheric CO2. Here we estimate spatially explicit patterns of biomass loss by tree mortality (LOSS) from largely unmanaged forest plots to constrain projected (2015–2099) net primary productivity (NPP), heterotrophic respiration (HR) and net carbon sink in six dynamic global vegetation models (DGVMs) across continents. This approach relies on a strong relationship among LOSS, NPP, and HR at continental or biome scales. The DGVMs overestimated historical LOSS, particularly in tropical regions and eastern North America by as much as 5 Mg ha−1 y−1. The modeled spread of DGVM-projected NPP and HR uncertainties was substantially reduced in tropical regions after incorporating the field-based mortality constraint. The observation-constrained models show a decrease in the tropical forest carbon sink by the end of the century, particularly across South America (from 2 to 1.4 PgC y−1), and an increase in the sink in North America (from 0.8 to 1.1 PgC y−1). These results highlight the feasibility of using forest demographic data to empirically constrain forest carbon sink projections and the potential overestimation of projected tropical forest carbon sinks. Here the authors use broad-scale tree mortality data to estimate biomass loss, constraining uncertainty of projected forest net primary productivity in 6 models, finding weaker tropical forest carbon sinks with climate change.
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Affiliation(s)
- Kailiang Yu
- Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCECEA/CNRS/UVSQ Saclay, Gif-sur-Yvette, France. .,Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, USA.
| | - Philippe Ciais
- Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCECEA/CNRS/UVSQ Saclay, Gif-sur-Yvette, France.,The Cyprus Institute, Nicosia, Cyprus
| | - Sonia I Seneviratne
- Institute for Atmospheric and Climate Science, ETH Zürich, Zürich, Switzerland
| | - Zhihua Liu
- Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, USA
| | - Han Y H Chen
- Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada
| | - Jonathan Barichivich
- Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCECEA/CNRS/UVSQ Saclay, Gif-sur-Yvette, France.,Instituto de Geografía, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile
| | - Craig D Allen
- Department of Geography and Environmental Studies, University of New Mexico, Albuquerque, NM, USA
| | - Hui Yang
- Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCECEA/CNRS/UVSQ Saclay, Gif-sur-Yvette, France.,Max Planck Institute for Biogeochemistry, Jena, Germany
| | - Yuanyuan Huang
- Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCECEA/CNRS/UVSQ Saclay, Gif-sur-Yvette, France.,CSIRO Oceans and Atmosphere, Aspendale, Australia
| | - Ashley P Ballantyne
- Le Laboratoire des Sciences du Climat et de l'Environnement, IPSL-LSCECEA/CNRS/UVSQ Saclay, Gif-sur-Yvette, France.,Department of Ecosystem and Conservation Sciences, University of Montana, Missoula, USA
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5
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Rogers A, Serbin SP, Way DA. Reducing model uncertainty of climate change impacts on high latitude carbon assimilation. GLOBAL CHANGE BIOLOGY 2022; 28:1222-1247. [PMID: 34689389 DOI: 10.1111/gcb.15958] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 09/17/2021] [Indexed: 06/13/2023]
Abstract
The Arctic-Boreal Region (ABR) has a large impact on global vegetation-atmosphere interactions and is experiencing markedly greater warming than the rest of the planet, a trend that is projected to continue with anticipated future emissions of CO2 . The ABR is a significant source of uncertainty in estimates of carbon uptake in terrestrial biosphere models such that reducing this uncertainty is critical for more accurately estimating global carbon cycling and understanding the response of the region to global change. Process representation and parameterization associated with gross primary productivity (GPP) drives a large amount of this model uncertainty, particularly within the next 50 years, where the response of existing vegetation to climate change will dominate estimates of GPP for the region. Here we review our current understanding and model representation of GPP in northern latitudes, focusing on vegetation composition, phenology, and physiology, and consider how climate change alters these three components. We highlight challenges in the ABR for predicting GPP, but also focus on the unique opportunities for advancing knowledge and model representation, particularly through the combination of remote sensing and traditional boots-on-the-ground science.
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Affiliation(s)
- Alistair Rogers
- Environmental & Climate Sciences Department, Brookhaven National Laboratory, Upton, New York, USA
| | - Shawn P Serbin
- Environmental & Climate Sciences Department, Brookhaven National Laboratory, Upton, New York, USA
| | - Danielle A Way
- Environmental & Climate Sciences Department, Brookhaven National Laboratory, Upton, New York, USA
- Department of Biology, University of Western Ontario, London, Ontario, Canada
- Nicholas School of the Environment, Duke University, Durham, North Carolina, USA
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6
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Murphy BK, Way DA. Warming and elevated CO2 alter tamarack C fluxes, growth and mortality: evidence for heat stress-related C starvation in the absence of water stress. TREE PHYSIOLOGY 2021; 41:2341-2358. [PMID: 34077546 DOI: 10.1093/treephys/tpab077] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/24/2021] [Indexed: 06/12/2023]
Abstract
Climate warming is increasing the frequency of climate-induced tree mortality events. While drought combined with heat is considered the primary cause of this mortality, little is known about whether moderately high temperatures alone can induce mortality, or whether rising CO2 would prevent mortality at high growth temperatures. We grew tamarack (Larix laricina) under ambient (400 p.p.m.) and elevated (750 p.p.m.) CO2 concentrations combined with ambient, ambient +4 °C and ambient +8 °C growth temperatures to investigate whether high growth temperatures lead to carbon (C) limitations and mortality. Growth at +8 °C led to 40% mortality in the ambient CO2 (8TAC) treatment, but no mortality in the elevated CO2 treatment. Thermal acclimation of respiration led to similar leaf C balances across the warming treatments, despite a lack of photosynthetic acclimation. Photosynthesis was stimulated under elevated CO2, increasing seedling growth, but not leaf C concentrations. However, growth and foliar C concentrations were lowest in the +8 °C treatments, even with elevated CO2. Dying 8TAC seedlings had lower needle C concentrations and lower ratios of photosynthesis to respiration than healthy 8TAC seedlings, indicating that C limitations were likely the cause of seedling mortality under high growth temperatures.
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Affiliation(s)
- Bridget K Murphy
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada
- Graduate Program in Cell and Systems Biology, University of Toronto, Toronto, ON, M5S 3B2, Canada
| | - Danielle A Way
- Department of Biology, University of Toronto Mississauga, Mississauga, ON, L5L 1C6, Canada
- Nicholas School of the Environment, Duke University, Durham, NC, USA
- Terrestrial Ecosystem Science & Technology Group, Environmental & Climate Sciences Department, Brookhaven National Laboratory, Upton, NY, USA
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7
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Liu J, Zou HX, Bachelot B, Dong T, Zhu Z, Liao Y, Plenković-Moraj A, Wu Y. Predicting the responses of subalpine forest landscape dynamics to climate change on the eastern Tibetan Plateau. GLOBAL CHANGE BIOLOGY 2021; 27:4352-4366. [PMID: 34060175 DOI: 10.1111/gcb.15727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 05/18/2021] [Accepted: 05/20/2021] [Indexed: 06/12/2023]
Abstract
Subalpine vegetation across the Tibetan Plateau is globally one of the most sensitive to climate change. However, the potential landscape-scale effects of climate change on subalpine forest dynamics remain largely unexplored. Here, we used a forest landscape model (LANDIS-II) coupled with a forest ecosystem process model (PnET-II) to simulate forest dynamics under future climate change in Jiuzhaigou National Nature Reserve in the eastern subalpine region of the Tibetan Plateau. We examined changes in the composition, distribution and aboveground biomass of cold temperate coniferous forests, temperate coniferous forests, deciduous broad-leaved forests and redwood forest under four climate change scenarios (RCP2.6, RCP4.5, RCP8.5 and the current climate) from 2016 to 2096. Our model predicts that by 2096, (i) cold temperate coniferous forests will expand and increase by 7.92%, 8.18%, 8.65% and 7.02% under current climate, RCP2.6, RCP4.5 and RCP8.5 scenarios, respectively; (ii) distribution of forests as a whole shows upward elevational range shift, especially under RCP8.5 scenario and (iii) total aboveground biomass slowly increases at first and then decreases to 12%-16% of current distribution under RCPs. These results show that climate change can be expected to significantly influence forest composition, distribution and aboveground biomass in the subalpine forests of eastern Tibetan Plateau. This study is the first to simulate forest dynamics at the landscape scale in subalpine areas of the Tibetan Plateau, which provides an important step in developing more effective strategies of forest management for expected climate change, not only in China but also around the world.
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Affiliation(s)
- Junyan Liu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
- Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, and College of Life Sciences, China West Normal University, Nanchong, Sichuan, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Heng-Xing Zou
- Department of BioSciences, Program in Ecology and Evolutionary Biology, Rice University, Houston, TX, USA
| | - Benedicte Bachelot
- Department of Plant Biology, Ecology, and Evolution, Oklahoma State University, Stillwater, OK, USA
| | - Tingfa Dong
- Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, and College of Life Sciences, China West Normal University, Nanchong, Sichuan, China
| | - Zhongfu Zhu
- Jiuzhaigou Nature Reserve Administrative Bureau, Jiuzhaigou, China
| | - Yuchen Liao
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
| | | | - Yan Wu
- Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, China
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8
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Continent-wide synthesis of the long-term population dynamics of quaking aspen in the face of accelerating human impacts. Oecologia 2021; 197:25-42. [PMID: 34365517 DOI: 10.1007/s00442-021-05013-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 08/03/2021] [Indexed: 10/20/2022]
Abstract
In recent decades, climate change has disrupted forest functioning by promoting large-scale mortality events, declines in productivity and reduced regeneration. Understanding the temporal dynamics and spatial extent of these changes is critical given the essential ecosystem services provided by forests. As the most widespread tree species in North America, quaking aspen (Populus tremuloides) is well suited for studying the dynamics of tree populations during a period of unprecedented climate change. Synthesizing continent-wide data, we show that mortality rates of mature aspen stems have increased over the past two-to-three decades, while relative gains in aspen basal area have decreased during the same period. Patterns were pervasive across multiple stand size classes and composition types in western North America biomes, suggesting that trends in demographic rates were not simply a reflection of stand development and succession. Our review of the literature revealed that increased aspen mortality and reduced growth rates were most often associated with hotter, drier conditions, whereas reduced recruitment was most often associated with herbivory. Furthermore, interactions between climate and competition, as well as climate and insect herbivory, had important, context-dependent effects on mortality and growth, respectively. Our analyses of aspen across its entire geographic range indicate that this important tree species is experiencing substantial increases in mortality and decreases in population growth rates across multiple biomes. If such trends are not accompanied by increased recruitment, we expect that the reduced dominance of aspen in forests will lead to major declines in the many essential ecosystem services it provides.
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9
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Hisano M, Ryo M, Chen X, Chen HYH. Rapid functional shifts across high latitude forests over the last 65 years. GLOBAL CHANGE BIOLOGY 2021; 27:3846-3858. [PMID: 33993581 DOI: 10.1111/gcb.15710] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 05/07/2021] [Indexed: 06/12/2023]
Abstract
Global environmental changes have strongly affected forest demographic rates, particularly amplified tree mortality in high latitude forests (e.g., two to five times greater mortality probability over the half-century). Although forest functional composition is critical for multitrophic biodiversity and ecosystem functioning, it remains unclear how functional composition has changed over time across large high latitude regions, which have been warming twice the rate of the globe as a whole. Using extensive spatial and long-term forest inventory data (17,107 plots monitored 1951-2016) across Canada, we found that after accounting for stand age-dependent functional shifts, functional composition shifted toward fast-growing deciduous broadleaved trees and higher drought tolerance over time. The temporal shift toward deciduous broadleaved trees was consistent across the baseline climate. However, over the study period, drought tolerance increased (or shade tolerance decreased) by 300% in colder boreal regions, while drought tolerance did not shift significantly in warmer temperate climates. A further analysis accounting for temporal changes in atmospheric CO2 , temperature, and water availability indicated that the functional composition of colder regions shifted toward drought tolerance more rapidly with rising CO2 than warmer regions, suggesting the greater vulnerability of boreal forests than temperate forests under ongoing global environmental changes. Future ecosystem management practices should consider spatial differences in functional responses to global environmental change, focusing on high latitude forests experiencing higher rates of warming and compositional changes.
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Affiliation(s)
- Masumi Hisano
- Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada
- Department of Ecosystem Studies, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo, Japan
| | - Masahiro Ryo
- Leibniz Centre for Agricultural Landscape Research (ZALF), Muencheberg, Germany
| | - Xinli Chen
- Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada
| | - Han Y H Chen
- Faculty of Natural Resources Management, Lakehead University, Thunder Bay, ON, Canada
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10
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Masaki T, Kitagawa R, Nakashizuka T, Shibata M, Tanaka H. Interspecific variation in mortality and growth and changes in their relationship with size class in an old-growth temperate forest. Ecol Evol 2021; 11:8869-8881. [PMID: 34257933 PMCID: PMC8258222 DOI: 10.1002/ece3.7720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2020] [Revised: 04/29/2021] [Accepted: 05/05/2021] [Indexed: 11/09/2022] Open
Abstract
Understanding trade-offs between demographic parameters is crucial when investigating community assembly rules in high-diversity forests. To this end, we estimated mortality and growth parameters, and correlations among them, across entire size classes for 17 tree species (Betula, Carpinus, Fagus, Quercus, Castanea, Acer, Cerasus, Swida, Kalopanax, and Styrax) using a dataset over 18 years obtained from an old-growth forest in Japan.Size classes were represented by 12 categories determined by age, height, and diameter at breast height (DBH) from new seedlings to stems of DBH >85 cm. We derived the annual mortality and growth for each species and class using estimates of transition probabilities between classes. Trade-offs or synergies in growth and survival among species per size class were analyzed with and without the inclusion of phylogenetic relationships.Annual mortality showed U-shaped patterns across size classes for species that could potentially reach a DBH ≥55 cm: 0.2-0.98 for seedlings, 0.002-0.01 at DBH 35-45 cm, and ca. 0.01 at DBH ≥55 cm. Other species demonstrated monotonically decreasing mortality toward specific maximum size classes. When phylogenetic information was included in analyses, the correlations between survival and growth changed across size classes were significant for some classes: As an overall tendency, synergy was observed in growth and survival for seedling to sapling classes, trade-offs for juvenile to DBH 15-25 cm classes, and synergy again for larger classes. When phylogenetic information was not included, a significant trade-off was observed only at DBH 5-15 cm. Synthesis. Trade-offs at intermediate classes imply differentiation in demographic characteristics related to life history strategies. However, evolutionarily obtained demographic characteristics are not substantial drivers of niche differentiation in the study area. The polylemma of mortality, growth, and other parameters such as the onset of reproduction may also be important factors driving species-specific demographic traits.
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Affiliation(s)
- Takashi Masaki
- Forestry and Forest Products Research InstituteTsukubaJapan
| | - Ryo Kitagawa
- Kansai Research CenterForestry and Forest Products Research InstituteKyotoJapan
| | | | - Mitsue Shibata
- Forestry and Forest Products Research InstituteTsukubaJapan
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11
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Walker AP, De Kauwe MG, Bastos A, Belmecheri S, Georgiou K, Keeling RF, McMahon SM, Medlyn BE, Moore DJP, Norby RJ, Zaehle S, Anderson-Teixeira KJ, Battipaglia G, Brienen RJW, Cabugao KG, Cailleret M, Campbell E, Canadell JG, Ciais P, Craig ME, Ellsworth DS, Farquhar GD, Fatichi S, Fisher JB, Frank DC, Graven H, Gu L, Haverd V, Heilman K, Heimann M, Hungate BA, Iversen CM, Joos F, Jiang M, Keenan TF, Knauer J, Körner C, Leshyk VO, Leuzinger S, Liu Y, MacBean N, Malhi Y, McVicar TR, Penuelas J, Pongratz J, Powell AS, Riutta T, Sabot MEB, Schleucher J, Sitch S, Smith WK, Sulman B, Taylor B, Terrer C, Torn MS, Treseder KK, Trugman AT, Trumbore SE, van Mantgem PJ, Voelker SL, Whelan ME, Zuidema PA. Integrating the evidence for a terrestrial carbon sink caused by increasing atmospheric CO 2. THE NEW PHYTOLOGIST 2021; 229:2413-2445. [PMID: 32789857 DOI: 10.1111/nph.16866] [Citation(s) in RCA: 130] [Impact Index Per Article: 43.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Accepted: 07/06/2020] [Indexed: 05/22/2023]
Abstract
Atmospheric carbon dioxide concentration ([CO2 ]) is increasing, which increases leaf-scale photosynthesis and intrinsic water-use efficiency. These direct responses have the potential to increase plant growth, vegetation biomass, and soil organic matter; transferring carbon from the atmosphere into terrestrial ecosystems (a carbon sink). A substantial global terrestrial carbon sink would slow the rate of [CO2 ] increase and thus climate change. However, ecosystem CO2 responses are complex or confounded by concurrent changes in multiple agents of global change and evidence for a [CO2 ]-driven terrestrial carbon sink can appear contradictory. Here we synthesize theory and broad, multidisciplinary evidence for the effects of increasing [CO2 ] (iCO2 ) on the global terrestrial carbon sink. Evidence suggests a substantial increase in global photosynthesis since pre-industrial times. Established theory, supported by experiments, indicates that iCO2 is likely responsible for about half of the increase. Global carbon budgeting, atmospheric data, and forest inventories indicate a historical carbon sink, and these apparent iCO2 responses are high in comparison to experiments and predictions from theory. Plant mortality and soil carbon iCO2 responses are highly uncertain. In conclusion, a range of evidence supports a positive terrestrial carbon sink in response to iCO2 , albeit with uncertain magnitude and strong suggestion of a role for additional agents of global change.
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Affiliation(s)
- Anthony P Walker
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Martin G De Kauwe
- ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, 2052, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
- Evolution and Ecology Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Ana Bastos
- Ludwig Maximilians University of Munich, Luisenstr. 37, Munich, 80333, Germany
| | - Soumaya Belmecheri
- Laboratory of Tree Ring Research, University of Arizona, 1215 E Lowell St, Tucson, AZ, 85721, USA
| | - Katerina Georgiou
- Department of Earth System Science, Stanford University, Stanford, CA, 94305, USA
| | - Ralph F Keeling
- Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, 92093, USA
| | - Sean M McMahon
- Smithsonian Environmental Research Center, Edgewater, MD, 21037, USA
| | - Belinda E Medlyn
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - David J P Moore
- School of Natural Resources and the Environment, 1064 East Lowell Street, Tucson, AZ, 85721, USA
| | - Richard J Norby
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Sönke Zaehle
- Max Planck Institute for Biogeochemistry, Hans-Knöll-Str. 10, Jena, 07745, Germany
| | - Kristina J Anderson-Teixeira
- Conservation Ecology Center, Smithsonian Conservation Biology Institute, MRC 5535, Front Royal, VA, 22630, USA
- Center for Tropical Forest Science-Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Panama City, Panama
| | - Giovanna Battipaglia
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Università della Campania, Caserta, 81100, Italy
| | | | - Kristine G Cabugao
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Maxime Cailleret
- INRAE, UMR RECOVER, Aix-Marseille Université, 3275 route de Cézanne, Aix-en-Provence Cedex 5, 13182, France
- Swiss Federal Institute for Forest Snow and Landscape Research (WSL), Zürcherstrasse 111, 8903 Birmensdorf, Switzerland
| | - Elliott Campbell
- Department of Geography, University of California Santa Barbara, Santa Barbara, CA, 93106, USA
| | - Josep G Canadell
- CSIRO Oceans and Atmosphere, GPO Box 1700, Canberra, ACT, 2601, Australia
| | - Philippe Ciais
- Laboratoire des Sciences du Climat et de l'Environnement, LSCE/IPSL, CEA-CNRS-UVSQ, Université Paris-Saclay, Gif-sur-Yvette, F-91191, France
| | - Matthew E Craig
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - David S Ellsworth
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Graham D Farquhar
- Plant Sciences, Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia
| | - Simone Fatichi
- Department of Civil and Environmental Engineering, National University of Singapore, 1 Engineering Drive 2, Singapore, 117576, Singapore
- Institute of Environmental Engineering, ETH Zurich, Stefano-Franscini Platz 5, Zurich, 8093, Switzerland
| | - Joshua B Fisher
- Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Dr., Pasadena, CA, 91109, USA
| | - David C Frank
- Laboratory of Tree Ring Research, University of Arizona, 1215 E Lowell St, Tucson, AZ, 85721, USA
| | - Heather Graven
- Department of Physics, Imperial College London, South Kensington Campus, London, SW7 2AZ, UK
| | - Lianhong Gu
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Vanessa Haverd
- CSIRO Oceans and Atmosphere, GPO Box 1700, Canberra, ACT, 2601, Australia
| | - Kelly Heilman
- Laboratory of Tree Ring Research, University of Arizona, 1215 E Lowell St, Tucson, AZ, 85721, USA
| | - Martin Heimann
- Max Planck Institute for Biogeochemistry, Hans-Knöll-Str. 10, Jena, 07745, Germany
| | - Bruce A Hungate
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA
| | - Colleen M Iversen
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Fortunat Joos
- Climate and Environmental Physics, Physics Institute and Oeschger Centre for Climate Change Research, University of Bern, Sidlerstr. 5, Bern, CH-3012, Switzerland
| | - Mingkai Jiang
- Hawkesbury Institute for the Environment, Western Sydney University, Locked Bag 1797, Penrith, NSW, 2751, Australia
| | - Trevor F Keenan
- Department of Environmental Science, Policy and Management, UC Berkeley, Berkeley, CA, 94720, USA
- Earth and Environmental Sciences Area, Lawrence Berkeley National Lab., Berkeley, CA, 94720, USA
| | - Jürgen Knauer
- CSIRO Oceans and Atmosphere, GPO Box 1700, Canberra, ACT, 2601, Australia
| | - Christian Körner
- Department of Environmental Sciences, Botany, University of Basel, Basel, 4056, Switzerland
| | - Victor O Leshyk
- Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, AZ, 86011, USA
| | - Sebastian Leuzinger
- School of Science, Auckland University of Technology, Auckland, 1142, New Zealand
| | - Yao Liu
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Natasha MacBean
- Department of Geography, Indiana University, Bloomington, IN, 47405, USA
| | - Yadvinder Malhi
- School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, UK
| | - Tim R McVicar
- CSIRO Land and Water, GPO Box 1700, Canberra, ACT, 2601, Australia
- Australian Research Council Centre of Excellence for Climate Extremes, 142 Mills Rd, Australian National University, Canberra, ACT, 2601, Australia
| | - Josep Penuelas
- CSIC, Global Ecology CREAF-CSIC-UAB, Bellaterra, Barcelona, Catalonia, 08193, Spain
- CREAF, Cerdanyola del Vallès, Barcelona, Catalonia, 08193, Spain
| | - Julia Pongratz
- Ludwig Maximilians University of Munich, Luisenstr. 37, Munich, 80333, Germany
- Max Planck Institute for Meteorology, Bundesstr. 53, 20146 Hamburg, Germany
| | - A Shafer Powell
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Terhi Riutta
- School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, UK
| | - Manon E B Sabot
- ARC Centre of Excellence for Climate Extremes, University of New South Wales, Sydney, NSW, 2052, Australia
- Climate Change Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
- Evolution and Ecology Research Centre, University of New South Wales, Sydney, NSW, 2052, Australia
| | - Juergen Schleucher
- Department of Medical Biochemistry & Biophysics, Umeå University, Umea, 901 87, Sweden
| | - Stephen Sitch
- College of Life and Environmental Sciences, University of Exeter, Exeter, Laver Building, EX4 4QF, UK
| | - William K Smith
- School of Natural Resources and the Environment, 1064 East Lowell Street, Tucson, AZ, 85721, USA
| | - Benjamin Sulman
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, USA
| | - Benton Taylor
- Smithsonian Environmental Research Center, Edgewater, MD, 21037, USA
| | - César Terrer
- Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA
| | - Margaret S Torn
- Earth and Environmental Sciences Area, Lawrence Berkeley National Lab., Berkeley, CA, 94720, USA
| | - Kathleen K Treseder
- Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA, 92697, USA
| | - Anna T Trugman
- Department of Geography, 1832 Ellison Hall, Santa Barbara, CA, 93016, USA
| | - Susan E Trumbore
- Max Planck Institute for Biogeochemistry, Hans-Knöll-Str. 10, Jena, 07745, Germany
| | | | - Steve L Voelker
- Department of Environmental and Forest Biology, State University of New York College of Environmental Science and Forestry, Syracuse, NY, 13210, USA
| | - Mary E Whelan
- Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, NJ, 08901, USA
| | - Pieter A Zuidema
- Forest Ecology and Forest Management group, Wageningen University, PO Box 47, Wageningen, 6700 AA, the Netherlands
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12
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Lin X, Rogers BM, Sweeney C, Chevallier F, Arshinov M, Dlugokencky E, Machida T, Sasakawa M, Tans P, Keppel-Aleks G. Siberian and temperate ecosystems shape Northern Hemisphere atmospheric CO 2 seasonal amplification. Proc Natl Acad Sci U S A 2020; 117:21079-21087. [PMID: 32817563 PMCID: PMC7474631 DOI: 10.1073/pnas.1914135117] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
The amplitude of the atmospheric CO2 seasonal cycle has increased by 30 to 50% in the Northern Hemisphere (NH) since the 1960s, suggesting widespread ecological changes in the northern extratropics. However, substantial uncertainty remains in the continental and regional drivers of this prominent amplitude increase. Here we present a quantitative regional attribution of CO2 seasonal amplification over the past 4 decades, using a tagged atmospheric transport model prescribed with observationally constrained fluxes. We find that seasonal flux changes in Siberian and temperate ecosystems together shape the observed amplitude increases in the NH. At the surface of northern high latitudes, enhanced seasonal carbon exchange in Siberia is the dominant contributor (followed by temperate ecosystems). Arctic-boreal North America shows much smaller changes in flux seasonality and has only localized impacts. These continental contrasts, based on an atmospheric approach, corroborate heterogeneous vegetation greening and browning trends from field and remote-sensing observations, providing independent evidence for regionally divergent ecological responses and carbon dynamics to global change drivers. Over surface midlatitudes and throughout the midtroposphere, increased seasonal carbon exchange in temperate ecosystems is the dominant contributor to CO2 amplification, albeit with considerable contributions from Siberia. Representing the mechanisms that control the high-latitude asymmetry in flux amplification found in this study should be an important goal for mechanistic land surface models moving forward.
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Affiliation(s)
- Xin Lin
- Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109;
| | | | - Colm Sweeney
- Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305
| | - Frédéric Chevallier
- Laboratoire des Sciences du Climat et de l'Environnement/Institut Pierre Simon Laplace, Commissariat à l'Énergie Atomique et aux Énergies Alternatives-CNRS-Université de Versailles Saint-Quentin-en-Yvelines, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
| | - Mikhail Arshinov
- Vladimir Evseevich Zuev Institute of Atmospheric Optics, Siberian Branch, Russian Academy of Sciences, Tomsk 634055, Russia
| | - Edward Dlugokencky
- Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305
| | - Toshinobu Machida
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
| | - Motoki Sasakawa
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
| | - Pieter Tans
- Global Monitoring Laboratory, National Oceanic and Atmospheric Administration, Boulder, CO 80305
| | - Gretchen Keppel-Aleks
- Climate and Space Sciences and Engineering, University of Michigan, Ann Arbor, MI 48109;
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13
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Han Q, Guo Q, Korpelainen H, Niinemets Ü, Li C. Rootstock determines the drought resistance of poplar grafting combinations. TREE PHYSIOLOGY 2019; 39:1855-1866. [PMID: 31595965 DOI: 10.1093/treephys/tpz102] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 09/09/2019] [Accepted: 09/12/2019] [Indexed: 06/10/2023]
Abstract
To increase yield and/or enhance resistance to diseases, grafting is often applied in agriculture and horticulture. Interspecific grafting could possibly be used in forestry as well to improve drought resistance, but our understanding of how the rootstock of a more drought-resistant species can affect the grafted plant is very limited. Reciprocal grafts of two poplar species, Populus cathayana Rehder (less drought-resistant, C) and Populus deltoides Bart. ex Marsh (more drought-resistant, D) were generated. Four grafting combinations (scion/rootstock: C/C, C/D, D/D and D/C) were subjected to well-watered and drought stress treatments. C/D and D/C had a higher diameter growth rate, leaf biomass, intrinsic water-use efficiency (WUEi) and total non-structural carbohydrate (NSC) content than C/C and D/D in well-watered condition. However, drought caused greater differences between P. deltoides-rooted and P. cathayana-rooted grafting combinations, especially between C/D and D/C. The C/D grafting combination showed higher resistance to drought, as indicated by a higher stem growth rate, net photosynthetic rate, WUEi, leaf water potential, proline concentration and NSC concentration and maintenance of integrity of the leaf cellular ultrastructure under drought when compared with D/C. D/C exhibited severely damaged cell membranes, mitochondria and chloroplasts under drought. The scion genotype caused a strong effect on the root proline concentration: the P. cathayana scion increased the root proline concentration more than the P. deltoides scion (C/C vs D/C and C/D vs D/D) under water deficit. Our results demonstrated that mainly the rootstock was responsible for the drought resistance of grafting combinations. Grafting of the P. cathayana scion onto P. deltoides rootstock resulted in superior growth and biomass when compared with the other three combinations both in well-watered and drought stress conditions.
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Affiliation(s)
- Qingquan Han
- Institute of Physical Education, Ludong University, Yantai 264025, China
| | - Qingxue Guo
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
| | - Helena Korpelainen
- Department of Agricultural Sciences, Viikki Plant Science Centre, PO Box 27, University of Helsinki, FI-00014 Helsinki, Finland
| | - Ülo Niinemets
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Kreutzwaldi 1, 51006 Tartu, Estonia
- Estonian Academy of Sciences, Kohtu 6, 10130 Tallinn, Estonia
| | - Chunyang Li
- College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China
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14
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Searle EB, Chen HYH. Complementarity effects are strengthened by competition intensity and global environmental change in the central boreal forests of Canada. Ecol Lett 2019; 23:79-87. [PMID: 31631491 DOI: 10.1111/ele.13411] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 09/22/2019] [Accepted: 09/29/2019] [Indexed: 01/23/2023]
Abstract
Increases in niche complementarity have been hypothesised to reduce the intensity of interspecific competition within natural forests. In regions currently experiencing potentially enhanced growth under global environmental change, niche complementarity may become even more beneficial. However, few studies have provided direct evidence of this mechanism. Here, we use data from 180 permanent sample plots in Manitoba, Canada, with a full spatial mapping of all stems, to show that complementarity effects on average increased with neighbourhood competition intensity and temporally rising CO2 , warming and water availability. Importantly, complementarity effects increased with both shade tolerance and phylogenetic dissimilarity between the focal tree and its neighbours. Our results provide further evidence that increasing stand functional and phylogenetic diversity can improve individual tree productivity, especially for individuals experiencing intense competition and may offer an avenue to maintain productivity under global environmental change.
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Affiliation(s)
- Eric B Searle
- Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada
| | - Han Y H Chen
- Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada.,Key Laboratory for Humid Subtropical Eco-geographical Processes of the Ministry of Education, Institute of Geographical Sciences, Fujian Normal University, Fuzhou, Fujian, 350007, China
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15
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Hisano M, Chen HYH, Searle EB, Reich PB. Species‐rich boreal forests grew more and suffered less mortality than species‐poor forests under the environmental change of the past half‐century. Ecol Lett 2019; 22:999-1008. [DOI: 10.1111/ele.13259] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Accepted: 03/06/2019] [Indexed: 01/22/2023]
Affiliation(s)
- Masumi Hisano
- Faculty of Natural Resources Management Lakehead University 955 Oliver Road Thunder Bay ONP7B 5E1 Canada
| | - Han Y. H. Chen
- Faculty of Natural Resources Management Lakehead University 955 Oliver Road Thunder Bay ONP7B 5E1 Canada
- Key Laboratory for Humid Subtropical Eco‐Geographical Processes of the Ministry of Education Fujian Normal University Fuzhou China
| | - Eric B. Searle
- Faculty of Natural Resources Management Lakehead University 955 Oliver Road Thunder Bay ONP7B 5E1 Canada
| | - Peter B. Reich
- Department of Forest Resources University of Minnesota St. Paul MN55108 USA
- Hawkesbury Institute for the Environment Western Sydney University Penrith NSW2753 Australia
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16
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Nicklen EF, Roland CA, Csank AZ, Wilmking M, Ruess RW, Muldoon LA. Stand basal area and solar radiation amplify white spruce climate sensitivity in interior Alaska: Evidence from carbon isotopes and tree rings. GLOBAL CHANGE BIOLOGY 2019; 25:911-926. [PMID: 30408264 DOI: 10.1111/gcb.14511] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Accepted: 10/18/2018] [Indexed: 06/08/2023]
Abstract
The negative growth response of North American boreal forest trees to warm summers is well documented and the constraint of competition on tree growth widely reported, but the potential interaction between climate and competition in the boreal forest is not well studied. Because competition may amplify or mute tree climate-growth responses, understanding the role current forest structure plays in tree growth responses to climate is critical in assessing and managing future forest productivity in a warming climate. Using white spruce tree ring and carbon isotope data from a long-term vegetation monitoring program in Denali National Park and Preserve, we investigated the hypotheses that (a) competition and site moisture characteristics mediate white spruce radial growth response to climate and (b) moisture limitation is the mechanism for reduced growth. We further examined the impact of large reproductive events (mast years) on white spruce radial growth and stomatal regulation. We found that competition and site moisture characteristics mediated white spruce climate-growth response. The negative radial growth response to warm and dry early- to mid-summer and dry late summer conditions intensified in high competition stands and in areas receiving high potential solar radiation. Discrimination against 13 C was reduced in warm, dry summers and further diminished on south-facing hillslopes and in high competition stands, but was unaffected by climate in open floodplain stands, supporting the hypothesis that competition for moisture limits growth. Finally, during mast years, we found a shift in current year's carbon resources from radial growth to reproduction, reduced 13 C discrimination, and increased intrinsic water-use efficiency. Our findings highlight the importance of temporally variable and confounded factors, such as forest structure and climate, on the observed climate-growth response of white spruce. Thus, white spruce growth trends and productivity in a warming climate will likely depend on landscape position and current forest structure.
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Affiliation(s)
- Elizabeth Fleur Nicklen
- Central Alaska Network, National Park Service, Fairbanks, Alaska
- Department of Biology and Wildlife, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, Alaska
| | - Carl A Roland
- Central Alaska Network, National Park Service, Fairbanks, Alaska
- Denali National Park and Preserve, Fairbanks, Alaska
| | - Adam Z Csank
- Department of Geography, University of Nevada Reno, Reno, Nevada
| | - Martin Wilmking
- Institute of Botany and Landscape Ecology, Ernst-Moritz-Arndt University Greifswald, Greifswald, Germany
| | - Roger W Ruess
- Department of Biology and Wildlife, Institute of Arctic Biology, University of Alaska Fairbanks, Fairbanks, Alaska
| | - Laurel Ann Muldoon
- Department of Environmental Geography, Nipissing University, North Bay, Ontario, Canada
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17
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Pelissari AL, F Filho A, Ebling AA, Sanquetta CR, Cysneiros VC, Corte APD. Spatial variability of tree species diversity in a mixed tropical forest in Southern Brazil. AN ACAD BRAS CIENC 2018; 90:2491-2500. [PMID: 30133578 DOI: 10.1590/0001-3765201820170826] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 01/31/2018] [Indexed: 11/22/2022] Open
Abstract
Floristic surveys and diversity indices are often applied to measure tree species diversity in mixed tropical forest remnants. However, these analyses are frequently limited to the overall results and do not allow to evaluate the spatial variability distributions of tree diversity, leading to develop additional tools. This study aimed to estimate the spatial variability of tree diversity and map their spatial patterns in a Brazilian mixed tropical forest conservation area. We used indices to measure the tree species diversity (dbh ≥ 10 cm) in 400 sampling units (25 m x 25 m) from a continuous forest inventory. Semivariograms were fitted to estimate spatial dependences and punctual kriging was applied to compose maps. Mean diversity values were constant in the continuous inventories, indicating a forest remnant in an advanced stage of ecological succession. On the other hand, tree diversity presented spatial patterns identified by geostatistics, in which the dynamics were composed of heterogeneous mosaics spatially influenced by tree species with different ecological features and densities, gap dynamics, advancement of forest succession, mortality, and Araucaria angustilofia's cohorts.
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Affiliation(s)
- Allan L Pelissari
- Departamento de Ciências Florestais, Universidade Federal do Paraná / UFPR, Av. Prof. Lothário Meissner, 632, 80210-170 Curitiba, PR, Brazil
| | - Afonso F Filho
- Departamento de Engenharia Florestal, Universidade Estadual do Centro-Oeste / UNICENTRO, PR 153, Km 7, 84500-000 Irati, PR, Brazil
| | - Angelo A Ebling
- Departamento de Engenharia Florestal, Universidade Federal Rural da Amazônia / UFRA, PA 275, Km 13, 68515-970 Parauapebas, PA, Brazil
| | - Carlos R Sanquetta
- Departamento de Ciências Florestais, Universidade Federal do Paraná / UFPR, Av. Prof. Lothário Meissner, 632, 80210-170 Curitiba, PR, Brazil
| | - Vinicius C Cysneiros
- Programa de Pós-Graduação em Engenharia Florestal, Universidade Federal do Paraná / UFPR, Av. Prof. Lothário Meissner, 632, 80210-170 Curitiba, PR, Brazil
| | - Ana Paula D Corte
- Departamento de Ciências Florestais, Universidade Federal do Paraná / UFPR, Av. Prof. Lothário Meissner, 632, 80210-170 Curitiba, PR, Brazil
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18
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McDowell N, Allen CD, Anderson-Teixeira K, Brando P, Brienen R, Chambers J, Christoffersen B, Davies S, Doughty C, Duque A, Espirito-Santo F, Fisher R, Fontes CG, Galbraith D, Goodsman D, Grossiord C, Hartmann H, Holm J, Johnson DJ, Kassim AR, Keller M, Koven C, Kueppers L, Kumagai T, Malhi Y, McMahon SM, Mencuccini M, Meir P, Moorcroft P, Muller-Landau HC, Phillips OL, Powell T, Sierra CA, Sperry J, Warren J, Xu C, Xu X. Drivers and mechanisms of tree mortality in moist tropical forests. THE NEW PHYTOLOGIST 2018; 219:851-869. [PMID: 29451313 DOI: 10.1111/nph.15027] [Citation(s) in RCA: 169] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2017] [Accepted: 12/19/2017] [Indexed: 05/22/2023]
Abstract
Tree mortality rates appear to be increasing in moist tropical forests (MTFs) with significant carbon cycle consequences. Here, we review the state of knowledge regarding MTF tree mortality, create a conceptual framework with testable hypotheses regarding the drivers, mechanisms and interactions that may underlie increasing MTF mortality rates, and identify the next steps for improved understanding and reduced prediction. Increasing mortality rates are associated with rising temperature and vapor pressure deficit, liana abundance, drought, wind events, fire and, possibly, CO2 fertilization-induced increases in stand thinning or acceleration of trees reaching larger, more vulnerable heights. The majority of these mortality drivers may kill trees in part through carbon starvation and hydraulic failure. The relative importance of each driver is unknown. High species diversity may buffer MTFs against large-scale mortality events, but recent and expected trends in mortality drivers give reason for concern regarding increasing mortality within MTFs. Models of tropical tree mortality are advancing the representation of hydraulics, carbon and demography, but require more empirical knowledge regarding the most common drivers and their subsequent mechanisms. We outline critical datasets and model developments required to test hypotheses regarding the underlying causes of increasing MTF mortality rates, and improve prediction of future mortality under climate change.
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Affiliation(s)
- Nate McDowell
- Pacific Northwest National Laboratory, Richland, WA, 99354, USA
| | - Craig D Allen
- US Geological Survey, Fort Collins Science Center, New Mexico Landscapes Field Station, Los Alamos, NM, 87544, USA
| | - Kristina Anderson-Teixeira
- Center for Tropical Forest Science-Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Washington, DC, 20036, USA
- Conservation Ecology Center, Smithsonian Conservation Biology Institute, National Zoological Park, Front Royal, VA, 22630, USA
| | - Paulo Brando
- Woods Hole Research Center, 149 Woods Hole Road, Falmouth, MA, 02450, USA
- Instituto de Pesquisa Ambiental de Amazonia, Lago Norte, Brasilia, Brazil
| | - Roel Brienen
- School of Geography, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Jeff Chambers
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Brad Christoffersen
- Department of Biology and School of Earth, Environmental and Marine Sciences, University of Texas Rio Grande Valley, Edinburg, TX, 78539, USA
| | - Stuart Davies
- Center for Tropical Forest Science-Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Washington, DC, 20036, USA
| | - Chris Doughty
- SICCS, Northern Arizona University, Flagstaff, AZ, 86001, USA
| | - Alvaro Duque
- Departmento de Ciencias Forestales, Universidad Nacional de Columbia, Medellín, Columbia
| | | | - Rosie Fisher
- National Center for Atmospheric Research, Boulder, CO, 80305, USA
| | - Clarissa G Fontes
- Department of Integrative Biology, University of California at Berkeley, Berkeley, CA, 94720, USA
| | - David Galbraith
- School of Geography, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Devin Goodsman
- Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | | | - Henrik Hartmann
- Department of Biogeochemical Processes, Max Plank Institute for Biogeochemistry, 07745, Jena, Germany
| | - Jennifer Holm
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | | | - Abd Rahman Kassim
- Geoinformation Programme, Forestry and Environment Division, Forest Research Institute Malaysia, Selangor, Malaysia
| | - Michael Keller
- International Institute of Tropical Forestry, USDA Jardin Botanico Sur, 1201 Calle Ceiba, San Juan, 00926, Puerto Rico
- Embrapa Agricultural Informatics, Parque Estacao Biologica, Brasilia DF, 70770, Brazil
- Jet Propulsion Laboratory, Pasadena, CA, 91109, USA
| | - Charlie Koven
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Lara Kueppers
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
- Energy and Resources Group, University of California, Berkeley, CA, 94720, USA
| | - Tomo'omi Kumagai
- Graduate School of Agricultural and Life Sciences, The University of Tokyo, 7 Chome-3-1 Hongo, Bunkyo, Tokyo, 113-8654, Japan
| | - Yadvinder Malhi
- Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, OX1 2JD, UK
| | - Sean M McMahon
- Center for Tropical Forest Science-Forest Global Earth Observatory, Smithsonian Tropical Research Institute, Washington, DC, 20036, USA
| | - Maurizio Mencuccini
- ICREA, CREAF, University of Barcelona, Gran Via de les Corts Catalenes, 585 08007, Barcelona, Spain
| | - Patrick Meir
- Australian National University, Acton, Canberra, ACT, 2601, Australia
- School of Geosciences, University of Edinburgh, Old College, South Bridge, Edinburgh, EH8 9YL, UK
| | | | - Helene C Muller-Landau
- Smithsonian Tropical Research Institute, Apartado Postal, 0843-03092, Panamá, República de Panamá
| | - Oliver L Phillips
- School of Geography, University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, UK
| | - Thomas Powell
- Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA
| | - Carlos A Sierra
- Department of Biogeochemical Processes, Max Plank Institute for Biogeochemistry, 07745, Jena, Germany
| | - John Sperry
- University of Utah, Salt Lake City, UT, 84112, USA
| | - Jeff Warren
- Oak Ridge National Laboratory, Oak Ridge, TN, 37830, USA
| | - Chonggang Xu
- Los Alamos National Laboratory, Los Alamos, NM, 87545, USA
| | - Xiangtao Xu
- Department of Geosciences, Princeton University, Princeton, NJ, 08544, USA
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19
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Elias F, Marimon BS, Marimon-Junior BH, Budke JC, Esquivel-Muelbert A, Morandi PS, Reis SM, Phillips OL. Idiosyncratic soil-tree species associations and their relationships with drought in a monodominant Amazon forest. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY 2018. [DOI: 10.1016/j.actao.2018.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Trugman AT, Medvigy D, Anderegg WRL, Pacala SW. Differential declines in Alaskan boreal forest vitality related to climate and competition. GLOBAL CHANGE BIOLOGY 2018; 24:1097-1107. [PMID: 29055122 DOI: 10.1111/gcb.13952] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2017] [Revised: 09/13/2017] [Accepted: 10/12/2017] [Indexed: 06/07/2023]
Abstract
Rapid warming and changes in water availability at high latitudes alter resource abundance, tree competition, and disturbance regimes. While these changes are expected to disrupt the functioning of boreal forests, their ultimate implications for forest composition are uncertain. In particular, recent site-level studies of the Alaskan boreal forest have reported both increases and decreases in productivity over the past few decades. Here, we test the idea that variations in Alaskan forest growth and mortality rates are contingent on species composition. Using forest inventory measurements and climate data from plots located throughout interior and south-central Alaska, we show significant growth and mortality responses associated with competition, midsummer vapor pressure deficit, and increased growing season length. The governing climate and competition processes differed substantially across species. Surprisingly, the most dramatic climate response occurred in the drought tolerant angiosperm species, trembling aspen, and linked high midsummer vapor pressure deficits to decreased growth and increased insect-related mortality. Given that species composition in the Alaskan and western Canadian boreal forests is projected to shift toward early-successional angiosperm species due to fire regime, these results underscore the potential for a reduction in boreal productivity stemming from increases in midsummer evaporative demand.
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Affiliation(s)
- Anna T Trugman
- Department of Biology, University of Utah, Salt Lake City, UT, USA
- Program in Atmospheric and Oceanic Sciences, Princeton University, Princeton, NJ, USA
| | - David Medvigy
- Department of Biological Sciences, University of Notre Dame, Notre Dame, IN, USA
| | | | - Stephen W Pacala
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ, USA
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21
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Chen L, Huang JG, Dawson A, Zhai L, Stadt KJ, Comeau PG, Whitehouse C. Contributions of insects and droughts to growth decline of trembling aspen mixed boreal forest of western Canada. GLOBAL CHANGE BIOLOGY 2018; 24:655-667. [PMID: 28762590 DOI: 10.1111/gcb.13855] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 07/24/2017] [Indexed: 05/25/2023]
Abstract
Insects, diseases, fire and drought and other disturbances associated with global climate change contribute to forest decline and mortality in many parts of the world. Forest decline and mortality related to drought or insect outbreaks have been observed in North American aspen forests. However, little research has been done to partition and estimate their relative contributions to growth declines. In this study, we combined tree-ring width and basal area increment series from 40 trembling aspen (Populus tremuloides Michx.) sites along a latitudinal gradient (from 52° to 58°N) in western Canada and attempted to investigate the effect of drought and insect outbreaks on growth decline, and simultaneously partition and quantify their relative contributions. Results indicated that the influence of drought on forest decline was stronger than insect outbreaks, although both had significant effects. Furthermore, the influence of drought and insect outbreaks showed spatiotemporal variability. In addition, our data suggest that insect outbreaks could be triggered by warmer early spring temperature instead of drought, implicating that potentially increased insect outbreaks are expected with continued warming springs, which may further exacerbate growth decline and death in North America aspen mixed forests.
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Affiliation(s)
- Lei Chen
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Jian-Guo Huang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Andria Dawson
- Department of Geosciences, University of Arizona, Tucson, AZ, USA
| | - Lihong Zhai
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Kenneth J Stadt
- Forest Management Branch, Alberta Agriculture and Forestry, Edmonton, AB, Canada
| | - Philip G Comeau
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada
| | - Caroline Whitehouse
- Forest Management Branch, Alberta Agriculture and Forestry, Edmonton, AB, Canada
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22
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Li Y, Zhang QB. History of Tree Growth Declines Recorded in Old Trees at Two Sacred Sites in Northern China. FRONTIERS IN PLANT SCIENCE 2017; 8:1779. [PMID: 29163557 PMCID: PMC5681856 DOI: 10.3389/fpls.2017.01779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 09/30/2017] [Indexed: 06/07/2023]
Abstract
Old forests are an important component in sacred sites, yet they are at risk of growth decline from ongoing global warming and increased human activities. Growth decline, characterized by chronic loss of tree vigor, is not a recent phenomenon. Knowledge of past occurrence of declines is useful for preparing conservation plans because it helps understand if present day forests are outside the natural range of variation in tree health. We report a dendroecological study of growth decline events in the past two centuries at two sacred sites, Hengshan and Wutaishan, in Shanxi province of northern China. Tree rings collected at both sites show distinct periods of declining growth evident as narrow rings. These occurred in the 1830s in both sites, in the 1920s in Wutaishan and in the 2000s in Hengshan. By comparing the pattern of grow declines at the two sites, we hypothesize that resistance of tree growth to external disturbances is forest size dependent, and increased human activity might be a factor additional to climatic droughts in causing the recent strong growth decline at Hengshan Park. Despite these past declines, the forests at both sites have high resilience to disturbances as evidenced by the ability of trees to recover their growth rates to levels comparable to the pre-decline period. Managers should consider reducing fragmentation and restoring natural habitat of old forests, especially in areas on dry sites.
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Affiliation(s)
- Yan Li
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
- College of Resources and Environment, University of the Chinese Academy of Sciences, Beijing, China
| | - Qi-Bin Zhang
- State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, China
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23
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Hisano M, Searle EB, Chen HYH. Biodiversity as a solution to mitigate climate change impacts on the functioning of forest ecosystems. Biol Rev Camb Philos Soc 2017; 93:439-456. [DOI: 10.1111/brv.12351] [Citation(s) in RCA: 96] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 06/12/2017] [Accepted: 06/15/2017] [Indexed: 01/22/2023]
Affiliation(s)
- Masumi Hisano
- Faculty of Natural Resources Management; Lakehead University; Thunder Bay P7B 5E1 Canada
| | - Eric B. Searle
- Faculty of Natural Resources Management; Lakehead University; Thunder Bay P7B 5E1 Canada
| | - Han Y. H. Chen
- Faculty of Natural Resources Management; Lakehead University; Thunder Bay P7B 5E1 Canada
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24
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Cailleret M, Jansen S, Robert EMR, Desoto L, Aakala T, Antos JA, Beikircher B, Bigler C, Bugmann H, Caccianiga M, Čada V, Camarero JJ, Cherubini P, Cochard H, Coyea MR, Čufar K, Das AJ, Davi H, Delzon S, Dorman M, Gea-Izquierdo G, Gillner S, Haavik LJ, Hartmann H, Hereş AM, Hultine KR, Janda P, Kane JM, Kharuk VI, Kitzberger T, Klein T, Kramer K, Lens F, Levanic T, Linares Calderon JC, Lloret F, Lobo-Do-Vale R, Lombardi F, López Rodríguez R, Mäkinen H, Mayr S, Mészáros I, Metsaranta JM, Minunno F, Oberhuber W, Papadopoulos A, Peltoniemi M, Petritan AM, Rohner B, Sangüesa-Barreda G, Sarris D, Smith JM, Stan AB, Sterck F, Stojanović DB, Suarez ML, Svoboda M, Tognetti R, Torres-Ruiz JM, Trotsiuk V, Villalba R, Vodde F, Westwood AR, Wyckoff PH, Zafirov N, Martínez-Vilalta J. A synthesis of radial growth patterns preceding tree mortality. GLOBAL CHANGE BIOLOGY 2017; 23:1675-1690. [PMID: 27759919 DOI: 10.1111/gcb.13535] [Citation(s) in RCA: 175] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Revised: 09/12/2016] [Accepted: 10/11/2016] [Indexed: 05/23/2023]
Abstract
Tree mortality is a key factor influencing forest functions and dynamics, but our understanding of the mechanisms leading to mortality and the associated changes in tree growth rates are still limited. We compiled a new pan-continental tree-ring width database from sites where both dead and living trees were sampled (2970 dead and 4224 living trees from 190 sites, including 36 species), and compared early and recent growth rates between trees that died and those that survived a given mortality event. We observed a decrease in radial growth before death in ca. 84% of the mortality events. The extent and duration of these reductions were highly variable (1-100 years in 96% of events) due to the complex interactions among study species and the source(s) of mortality. Strong and long-lasting declines were found for gymnosperms, shade- and drought-tolerant species, and trees that died from competition. Angiosperms and trees that died due to biotic attacks (especially bark-beetles) typically showed relatively small and short-term growth reductions. Our analysis did not highlight any universal trade-off between early growth and tree longevity within a species, although this result may also reflect high variability in sampling design among sites. The intersite and interspecific variability in growth patterns before mortality provides valuable information on the nature of the mortality process, which is consistent with our understanding of the physiological mechanisms leading to mortality. Abrupt changes in growth immediately before death can be associated with generalized hydraulic failure and/or bark-beetle attack, while long-term decrease in growth may be associated with a gradual decline in hydraulic performance coupled with depletion in carbon reserves. Our results imply that growth-based mortality algorithms may be a powerful tool for predicting gymnosperm mortality induced by chronic stress, but not necessarily so for angiosperms and in case of intense drought or bark-beetle outbreaks.
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Affiliation(s)
- Maxime Cailleret
- Forest Ecology, Department of Environmental Systems Science, Institute of Terrestrial Ecosystems, ETH Zürich, Universitätstrasse 22, 8092, Zürich, Switzerland
| | - Steven Jansen
- Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, 89081, Ulm, Germany
| | - Elisabeth M R Robert
- CREAF, Campus UAB, 08193, Cerdanyola del Vallès, Spain
- Laboratory of Plant Biology and Nature Management (APNA), Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
- Laboratory of Wood Biology and Xylarium, Royal Museum for Central Africa (RMCA), Leuvensesteenweg 13, 3080, Tervuren, Belgium
| | - Lucía Desoto
- Department of Life Sciences, Centre for Functional Ecology, University of Coimbra, Calçada Martim de Freitas, 3000-456, Coimbra, Portugal
| | - Tuomas Aakala
- Department of Forest Sciences, University of Helsinki, P.O. Box 27 (Latokartanonkaari 7), 00014, Helsinki, Finland
| | - Joseph A Antos
- Department of Biology, University of Victoria, PO Box 3020, STN CSC, Victoria, BC, V8W 3N5, Canada
| | - Barbara Beikircher
- Institute of Botany, University of Innsbruck, Sternwartestrasse 15, 6020, Innsbruck, Austria
| | - Christof Bigler
- Forest Ecology, Department of Environmental Systems Science, Institute of Terrestrial Ecosystems, ETH Zürich, Universitätstrasse 22, 8092, Zürich, Switzerland
| | - Harald Bugmann
- Forest Ecology, Department of Environmental Systems Science, Institute of Terrestrial Ecosystems, ETH Zürich, Universitätstrasse 22, 8092, Zürich, Switzerland
| | - Marco Caccianiga
- Dipartimento di Bioscienze, Università degli Studi di Milano, Via Giovanni Celoria 26, 20133, Milano, Italy
| | - Vojtěch Čada
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 961/129, 165 21, Praha 6-Suchdol, Czech Republic
| | - Jesus J Camarero
- Instituto Pirenaico de Ecología (IPE-CSIC), Avenida Montañana 1005, 50192, Zaragoza, Spain
| | - Paolo Cherubini
- Swiss Federal Institute for Forest, Snow and Landscape Research - WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland
| | - Hervé Cochard
- Unité Mixte de Recherche (UMR) 547 PIAF, Institut National de la Recherche Agronomique (INRA), Université Clermont Auvergne, 63100, Clermont-Ferrand, France
| | - Marie R Coyea
- Département des sciences du bois et de la forêt, Centre for Forest Research, Faculté de foresterie, de géographie et de géomatique, Université Laval, 2405 rue de la Terrasse, Québec, QC, G1V 0A6, Canada
| | - Katarina Čufar
- Biotechnical Faculty, University of Ljubljana, Jamnikarjeva 101, 1000, Ljubljana, Slovenia
| | - Adrian J Das
- U.S. Geological Survey, Western Ecological Research Center, 47050 Generals Highway, Three Rivers, CA, 93271, USA
| | - Hendrik Davi
- Ecologie des Forest Méditerranéennes (URFM), Institut National de la Recherche Agronomique (INRA), Domaine Saint Paul, Site Agroparc, 84914, Avignon Cedex 9, France
| | - Sylvain Delzon
- Unité Mixte de Recherche (UMR) 1202 BIOGECO, Institut National de la Recherche Agronomique (INRA), Université de Bordeaux, 33615, Pessac, France
| | - Michael Dorman
- Department of Geography and Environmental Development, Ben-Gurion University of the Negev, 84105, Beer-Sheva, Israel
| | - Guillermo Gea-Izquierdo
- Centro de Investigación Forestal (CIFOR), Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (INIA), Carretera La Coruña km 7.5, 28040, Madrid, Spain
| | - Sten Gillner
- Institute of Forest Botany and Forest Zoology, TU Dresden, 01062, Dresden, Germany
- Fachgebiet Vegetationstechnik und Pflanzenverwendung, Institut für Landschaftsarchitektur und Umweltplanung, TU Berlin, 10623, Berlin, Germany
| | - Laurel J Haavik
- Department of Entomology, University of Arkansas, Fayetteville, AR, 72701, USA
- Department of Ecology and Evolutionary Biology, University of Kansas, 1450 Jayhawk Boulevard, Lawrence, KS, 66045, USA
| | - Henrik Hartmann
- Max-Planck Institute for Biogeochemistry, Hans Knöll Strasse 10, 07745, Jena, Germany
| | - Ana-Maria Hereş
- CREAF, Campus UAB, 08193, Cerdanyola del Vallès, Spain
- Department of Biogeography and Global Change, National Museum of Natural History (MNCN), Consejo Superior de Investigaciones Científicas (CSIC), C/Serrano 115bis, 28006, Madrid, Spain
| | - Kevin R Hultine
- Department of Research, Conservation and Collections, Desert Botanical Garden, 1201 N Galvin Parkway, Phoenix, AZ, USA
| | - Pavel Janda
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 961/129, 165 21, Praha 6-Suchdol, Czech Republic
| | - Jeffrey M Kane
- Department of Forestry and Wildland Resources, Humboldt State University, 1 Harpst Street, Arcata, CA, 95521, USA
| | - Vyacheslav I Kharuk
- Siberian Division of the Russian Academy of Sciences (RAS), Sukachev Institute of Forest, Krasnoyarsk, 660036, Russia
| | - Thomas Kitzberger
- Department of Ecology, Universidad Nacional del Comahue, Quintral S/N, Barrio Jardín Botánico, 8400, San Carlos de Bariloche, Río Negro, Argentina
- Instituto de Investigaciones de Biodiversidad y Medio Ambiente (INIBOMA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Quintral 1250, 8400, San Carlos de Bariloche, Río Negro, Argentina
| | - Tamir Klein
- Institute of Soil, Water, and Environmental Sciences, Volcani Center, Agricultural Research Organization (ARO), PO Box 6, 50250, Beit Dagan, Israel
| | - Koen Kramer
- Alterra - Green World Research, Wageningen University, Droevendaalse steeg 1, 6700AA, Wageningen, The Netherlands
| | - Frederic Lens
- Naturalis Biodiversity Center, Leiden University, PO Box 9517, 2300RA, Leiden, The Netherlands
| | - Tom Levanic
- Department of Yield and Silviculture, Slovenian Forestry Institute, Večna pot 2, 1000, Ljubljana, Slovenia
| | - Juan C Linares Calderon
- Department of Physical, Chemical and Natural Systems, Pablo de Olavide University, Carretera de Utrera km 1, 41013, Seville, Spain
| | - Francisco Lloret
- CREAF, Campus UAB, 08193, Cerdanyola del Vallès, Spain
- Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Spain
| | - Raquel Lobo-Do-Vale
- Forest Research Centre, School of Agriculture, University of Lisbon, Tapada da Ajuda, 1349-017, Lisboa, Portugal
| | - Fabio Lombardi
- Department of Agricultural Science, Mediterranean University of Reggio Calabria, loc. Feo di Vito, 89060, Reggio Calabria, Italy
| | - Rosana López Rodríguez
- Forest Genetics and Physiology Research Group, Technical University of Madrid, Calle Ramiro de Maeztu 7, 28040, Madrid, Spain
- Hawkesbury Institute for the Environment, University of Western Sydney, Science Road, Richmond, NSW, 2753, Australia
| | - Harri Mäkinen
- Natural Resources Institute Finland (Luke), Viikinkaari 4, 00790, Helsinki, Finland
| | - Stefan Mayr
- Institute of Botany, University of Innsbruck, Sternwartestrasse 15, 6020, Innsbruck, Austria
| | - Ilona Mészáros
- Department of Botany, Faculty of Science and Technology, University of Debrecen, Egyetem tér 1, 4032, Debrecen, Hungary
| | - Juha M Metsaranta
- Northern Forestry Centre, Canadian Forest Service, Natural Resources Canada, 5320-122nd Street, Edmonton, AB, T6H 3S5, Canada
| | - Francesco Minunno
- Department of Forest Sciences, University of Helsinki, P.O. Box 27 (Latokartanonkaari 7), 00014, Helsinki, Finland
| | - Walter Oberhuber
- Institute of Botany, University of Innsbruck, Sternwartestrasse 15, 6020, Innsbruck, Austria
| | - Andreas Papadopoulos
- Department of Forestry and Natural Environment Management, Technological Educational Institute (TEI) of Stereas Elladas, Ag Georgiou 1, 36100, Karpenissi, Greece
| | - Mikko Peltoniemi
- Natural Resources Institute Finland (Luke), PO Box 18 (Jokiniemenkuja 1), 01301, Vantaa, Finland
| | - Any M Petritan
- Swiss Federal Institute for Forest, Snow and Landscape Research - WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland
- National Institute for Research-Development in Forestry ''Marin Dracea'', Eroilor 128, 077190, Voluntari, Romania
| | - Brigitte Rohner
- Forest Ecology, Department of Environmental Systems Science, Institute of Terrestrial Ecosystems, ETH Zürich, Universitätstrasse 22, 8092, Zürich, Switzerland
- Swiss Federal Institute for Forest, Snow and Landscape Research - WSL, Zürcherstrasse 111, 8903, Birmensdorf, Switzerland
| | | | - Dimitrios Sarris
- Faculty of Pure and Applied Sciences, Open University of Cyprus, Latsia, 2252, Nicosia, Cyprus
- Department of Biological Sciences, University of Cyprus, PO Box 20537, 1678, Nicosia, Cyprus
- Division of Plant Biology, Department of Biology, University of Patras, 26500, Patras, Greece
| | - Jeremy M Smith
- Department of Geography, University of Colorado, Boulder, CO, 80309-0260, USA
| | - Amanda B Stan
- Department of Geography, Planning and Recreation, Northern Arizona University, PO Box 15016, Flagstaff, AZ, 86011, USA
| | - Frank Sterck
- Forest Ecology and Forest Management Group, Wageningen University, Droevendaalsesteeg 3a, 6708 PB, Wageningen, The Netherlands
| | - Dejan B Stojanović
- Institute of Lowland Forestry and Environment, University of Novi Sad, Antona Cehova 13, PO Box 117, 21000, Novi Sad, Serbia
| | - Maria L Suarez
- Instituto de Investigaciones de Biodiversidad y Medio Ambiente (INIBOMA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Quintral 1250, 8400, San Carlos de Bariloche, Río Negro, Argentina
| | - Miroslav Svoboda
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 961/129, 165 21, Praha 6-Suchdol, Czech Republic
| | - Roberto Tognetti
- Dipartimenti di Bioscienze e Territorio, Università del Molise, C. da Fonte Lappone, 86090, Pesche, Italy
- European Forest Institute (EFI) Project Centre on Mountain Forests (MOUNTFOR), Via E. Mach 1, 38010, San Michele all'Adige, Italy
| | - José M Torres-Ruiz
- Unité Mixte de Recherche (UMR) 1202 BIOGECO, Institut National de la Recherche Agronomique (INRA), Université de Bordeaux, 33615, Pessac, France
| | - Volodymyr Trotsiuk
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 961/129, 165 21, Praha 6-Suchdol, Czech Republic
| | - Ricardo Villalba
- Laboratorio de Dendrocronología e Historia Ambiental, Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales (IANIGLA), CCT CONICET Mendoza, Av. Ruiz Leal s/n, Parque General San Martín, Mendoza, CP 5500, Argentina
| | - Floor Vodde
- Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Kreutzwaldi 5, 51014, Tartu, Estonia
| | - Alana R Westwood
- Boreal Avian Modelling Project, Department of Renewable Resources, University of Alberta, 751 General Services Building, Edmonton, AB, T6G 2H1, Canada
| | - Peter H Wyckoff
- University of Minnesota, 600 East 4th Street, Morris, MN, 56267, USA
| | - Nikolay Zafirov
- University of Forestry, Kliment Ohridski Street 10, 1756, Sofia, Bulgaria
| | - Jordi Martínez-Vilalta
- CREAF, Campus UAB, 08193, Cerdanyola del Vallès, Spain
- Universitat Autònoma de Barcelona, 08193, Cerdanyola del Vallès, Spain
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25
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Searle EB, Chen HYH. Persistent and pervasive compositional shifts of western boreal forest plots in Canada. GLOBAL CHANGE BIOLOGY 2017; 23:857-866. [PMID: 27465312 DOI: 10.1111/gcb.13420] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 06/06/2023]
Abstract
Species compositional shifts have important consequences to biodiversity and ecosystem function and services to humanity. In boreal forests, compositional shifts from late-successional conifers to early-successional conifers and deciduous broadleaves have been postulated based on increased fire frequency associated with climate change truncating stand age-dependent succession. However, little is known about how climate change has affected forest composition in the background between successive catastrophic fires in boreal forests. Using 1797 permanent sample plots from western boreal forests of Canada measured from 1958 to 2013, we show that after accounting for stand age-dependent succession, the relative abundances of early-successional deciduous broadleaves and early-successional conifers have increased at the expense of late-successional conifers with climate change. These background compositional shifts are persistent temporally, consistent across all forest stand ages and pervasive spatially across the region. Rising atmospheric CO2 promoted early-successional conifers and deciduous broadleaves, and warming increased early-successional conifers at the expense of late-successional conifers, but compositional shifts were not associated with climate moisture index. Our results emphasize the importance of climate change on background compositional shifts in the boreal forest and suggest further compositional shifts as rising CO2 and warming will continue in the 21st century.
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Affiliation(s)
- Eric B Searle
- Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada
| | - Han Y H Chen
- Faculty of Natural Resources Management, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada
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26
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Alam SA, Huang JG, Stadt KJ, Comeau PG, Dawson A, Gea-Izquierdo G, Aakala T, Hölttä T, Vesala T, Mäkelä A, Berninger F. Effects of Competition, Drought Stress and Photosynthetic Productivity on the Radial Growth of White Spruce in Western Canada. FRONTIERS IN PLANT SCIENCE 2017; 8:1915. [PMID: 29163627 PMCID: PMC5681961 DOI: 10.3389/fpls.2017.01915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 10/23/2017] [Indexed: 05/05/2023]
Abstract
Understanding the complex interactions of competition, climate warming-induced drought stress, and photosynthetic productivity on the radial growth of trees is central to linking climate change impacts on tree growth, stand structure and in general, forest productivity. Using a mixed modeling approach, a stand-level photosynthetic production model, climate, stand competition and tree-ring data from mixedwood stands in western Canada, we investigated the radial growth response of white spruce [Picea glauca (Moench.) Voss] to simulated annual photosynthetic production, simulated drought stress, and tree and stand level competition. The long-term (~80-year) radial growth of white spruce was constrained mostly by competition, as measured by total basal area, with minor effects from drought. There was no relation of competition and drought on tree growth but dominant trees increased their growth more strongly to increases in modeled photosynthetic productivity, indicating asymmetric competition. Our results indicate a co-limitation of drought and climatic factors inhibiting photosynthetic productivity for radial growth of white spruce in western Canada. These results illustrate how a modeling approach can separate the complex factors regulating both multi-decadal average radial growth and interannual radial growth variations of white spruce, and contribute to advance our understanding on sustainable management of mixedwood boreal forests in western Canada.
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Affiliation(s)
- Syed A. Alam
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Department of Physics, University of Helsinki, Helsinki, Finland
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Jian-Guo Huang
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- *Correspondence: Jian-Guo Huang
| | - Kenneth J. Stadt
- Forest Management Branch, Alberta Agriculture and Forestry, Edmonton, AB, Canada
| | - Philip G. Comeau
- Department of Renewable Resources, University of Alberta, Edmonton, AB, Canada
| | - Andria Dawson
- Department of General Education, Mount Royal University, Calgary, AB, Canada
| | | | - Tuomas Aakala
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Teemu Hölttä
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Timo Vesala
- Department of Physics, University of Helsinki, Helsinki, Finland
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Annikki Mäkelä
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Frank Berninger
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
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27
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Analysing Atmospheric Processes and Climatic Drivers of Tree Defoliation to Determine Forest Vulnerability to Climate Warming. FORESTS 2016. [DOI: 10.3390/f8010013] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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28
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McCulloh KA, Petitmermet J, Stefanski A, Rice KE, Rich RL, Montgomery RA, Reich PB. Is it getting hot in here? Adjustment of hydraulic parameters in six boreal and temperate tree species after 5 years of warming. GLOBAL CHANGE BIOLOGY 2016; 22:4124-4133. [PMID: 27122300 DOI: 10.1111/gcb.13323] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 02/27/2016] [Indexed: 05/26/2023]
Abstract
Global temperatures (T) are rising, and for many plant species, their physiological response to this change has not been well characterized. In particular, how hydraulic parameters may change has only been examined experimentally for a few species. To address this, we measured characteristics of the hydraulic architecture of six species growing in ambient T and ambient +3.4 °C T plots in two experimentally warmed forest sites in Minnesota. These sites are at the temperate-boreal ecotone, and we measured three species from each forest type. We hypothesized that relative to boreal species, temperate species near their northern range border would increase xylem conduit diameters when grown under elevated T. We also predicted a continuum of responses among wood types, with conduit diameter increases correlating with increases in the complexity of wood structure. Finally, we predicted that increases in conduit diameter and specific hydraulic conductivity would positively affect photosynthetic rates and growth. Our results generally supported our hypotheses, and conduit diameter increased under elevated T across all species, although this pattern was driven predominantly by three species. Two of these species were temperate angiosperms, but one was a boreal conifer, contrary to predictions. We observed positive relationships between the change in specific hydraulic conductivity and both photosynthetic rate (P = 0.080) and growth (P = 0.012). Our results indicate that species differ in their ability to adjust hydraulically to increases in T. Specifically, species with more complex xylem anatomy, particularly those individuals growing near the cooler edge of their range, appeared to be better able to increase conduit diameters and specific hydraulic conductivity, which permitted increases in photosynthesis and growth. Our data support results that indicate individual's ability to physiologically adjust is related to their location within their species range, and highlight that some wood types may adjust more easily than others.
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Affiliation(s)
| | - Joshua Petitmermet
- Department of Forest Engineering, Resources, and Management, Oregon State University, Corvallis, OR, 97331, USA
| | - Artur Stefanski
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
| | - Karen E Rice
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
| | - Roy L Rich
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
- Smithsonian Environmental Research Center, Edgewater, MD, 21037, USA
| | - Rebecca A Montgomery
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
| | - Peter B Reich
- Department of Forest Resources, University of Minnesota, St Paul, MN, 55108, USA
- Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, NSW, 2753, Australia
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29
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Chen HYH, Luo Y, Reich PB, Searle EB, Biswas SR. Climate change-associated trends in net biomass change are age dependent in western boreal forests of Canada. Ecol Lett 2016; 19:1150-8. [DOI: 10.1111/ele.12653] [Citation(s) in RCA: 71] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Revised: 05/09/2016] [Accepted: 06/28/2016] [Indexed: 01/21/2023]
Affiliation(s)
- Han Y. H. Chen
- Faculty of Natural Resources Management; Lakehead University; 955 Oliver Road Thunder Bay ON P7B 5E1 Canada
| | - Yong Luo
- Faculty of Natural Resources Management; Lakehead University; 955 Oliver Road Thunder Bay ON P7B 5E1 Canada
- Canadian Forest Service (Pacific Forestry Centre); Natural Resources Canada; 506 Burnside Road West Victoria BC V8Z 1M5 Canada
| | - Peter B. Reich
- Department of Forest Resources; University of Minnesota; 115 Green Hall, 1530 Cleveland Ave. N. St. Paul MN 55108-6112 USA
- Hawkesbury Institute for the Environment; University of Western Sydney; Locked Bag 1797 Penrith NSW 2751 Australia
| | - Eric B. Searle
- Faculty of Natural Resources Management; Lakehead University; 955 Oliver Road Thunder Bay ON P7B 5E1 Canada
| | - Shekhar R. Biswas
- Faculty of Natural Resources Management; Lakehead University; 955 Oliver Road Thunder Bay ON P7B 5E1 Canada
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30
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Engel N, Ewald R, Gupta KJ, Zrenner R, Hagemann M, Bauwe H. The presequence of Arabidopsis serine hydroxymethyltransferase SHM2 selectively prevents import into mesophyll mitochondria. PLANT PHYSIOLOGY 2011; 23:2887-2902. [PMID: 21976482 DOI: 10.1111/gcb.13595] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 12/01/2016] [Accepted: 12/03/2016] [Indexed: 05/28/2023]
Abstract
Serine hydroxymethyltransferases (SHMs) are important enzymes of cellular one-carbon metabolism and are essential for the photorespiratory glycine-into-serine conversion in leaf mesophyll mitochondria. In Arabidopsis (Arabidopsis thaliana), SHM1 has been identified as the photorespiratory isozyme, but little is known about the very similar SHM2. Although the mitochondrial location of SHM2 can be predicted, some data suggest that this particular isozyme could be inactive or not targeted into mitochondria. We report that SHM2 is a functional mitochondrial SHM. In leaves, the presequence of SHM2 selectively hinders targeting of the enzyme into mesophyll mitochondria. For this reason, the enzyme is confined to the vascular tissue of wild-type Arabidopsis, likely the protoxylem and/or adjacent cells, where it occurs together with SHM1. The resulting exclusion of SHM2 from the photorespiratory environment of mesophyll mitochondria explains why this enzyme cannot substitute for SHM1 in photorespiratory metabolism. Unlike the individual shm1 and shm2 null mutants, which require CO(2)-enriched air to inhibit photorespiration (shm1) or do not show any visible impairment (shm2), double-null mutants cannot survive in CO(2)-enriched air. It seems that SHM1 and SHM2 operate in a redundant manner in one-carbon metabolism of nonphotorespiring cells with a high demand of one-carbon units; for example, during lignification of vascular cells. We hypothesize that yet unknown kinetic properties of SHM2 might render this enzyme unsuitable for the high-folate conditions of photorespiring mesophyll mitochondria.
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Affiliation(s)
- Nadja Engel
- Department of Plant Physiology, University of Rostock, D-18051 Rostock, Germany
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