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  • 1
    In: Progress in Physical Geography: Earth and Environment, SAGE Publications, Vol. 47, No. 4 ( 2023-08), p. 570-596
    Kurzfassung: The longleaf pine ( Pinus palustris Mill.) and related ecosystem is an icon of the southeastern United States (US). Once covering an estimated 37 million ha from Texas to Florida to Virginia, the near-extirpation of, and subsequent restoration efforts for, the species has been well-documented over the past ca. 100 years. Although longleaf pine is one of the longest-lived tree species in the southeastern US—with documented ages of over 400 years—its use has not been reviewed in the field of dendrochronology. In this paper, we review the utility of longleaf pine tree-ring data within the applications of four primary, topical research areas: climatology and paleoclimate reconstruction, fire history, ecology, and archeology/cultural studies. Further, we highlight knowledge gaps in these topical areas, for which we introduce the Longleaf Tree-Ring Network (LTRN). The overarching purpose of the LTRN is to coalesce partners and data to expand the scientific use of longleaf pine tree-ring data across the southeastern US. As a first example of LTRN analytics, we show that the development of seasonwood chronologies (earlywood width, latewood width, and total width) enhances the utility of longleaf pine tree-ring data, indicating the value of these seasonwood metrics for future studies. We find that at 21 sites distributed across the species’ range, latewood width chronologies outperform both their earlywood and total width counterparts in mean correlation coefficient (RBAR = 0.55, 0.46, 0.52, respectively). Strategic plans for increasing the utility of longleaf pine dendrochronology in the southeastern US include [1] saving remnant material ( e.g., stumps, logs, and building construction timbers) from decay, extraction, and fire consumption to help extend tree-ring records, and [2] developing new chronologies in LTRN spatial gaps to facilitate broad-scale analyses of longleaf pine ecosystems within the context of the topical groups presented.
    Materialart: Online-Ressource
    ISSN: 0309-1333 , 1477-0296
    RVK:
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2023
    ZDB Id: 2006623-5
    SSG: 14
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 2018
    In:  The Holocene Vol. 28, No. 5 ( 2018-05), p. 767-777
    In: The Holocene, SAGE Publications, Vol. 28, No. 5 ( 2018-05), p. 767-777
    Kurzfassung: The Pecos River provides an important source of water for New Mexico and Texas, US, and Mexico. Severe and prolonged drought combined with increasing temperatures during the early 21st century boosted attention on water resources and allocation management in the American West. We provide a tree-ring-based streamflow reconstruction for the Pecos River for the period 1310–2013 CE for the overarching purpose of placing the current Pecos River streamflow declines in a multi-century context. Over the past ca. 700 years, dry events ( n = 93) that lasted at least 2 years were more common than wet events ( n = 76), wherein flow was below/above the instrumental mean (61.6 m 3 s −1 ). Although more prolonged droughts occurred during the 15th and 18th centuries, the gage record (1930–2013 CE) captures the full range and variability of flow extremes within the context of the past 700 years. The 11-year drought of 1772–1782 was the highest ranked based on magnitude + intensity below the instrumental mean, slightly edging out the 1415–1425 and 1950–1957 events. The driest events that have occurred from the 14th through the 20th centuries are challenged by flow conditions since the turn of the 21st century. The 2000–2006 and 2011–2013 dry periods ranked 6th and 13th, respectively, though the intensity (−40 m 3 s −1 yr −1 ) of the 2011–2013 event exceeded all higher ranked droughts. The lowest single water-year flow in the reconstruction was shared by years 1904 and 2002, during which the flow of the Pecos River was estimated at 8.1 m 3 s −1 . Other extreme low-flow years were 1685 (9.5 m 3 s −1 ) and 1579 (9.8 m 3 s −1 ), but are eclipsed by 1904 and 2002 when considering the lower bounds of bootstrapped confidence limits of the reconstruction. Increased flow variability combined with projected increased temperatures and decreased precipitation will likely present new challenges to water resource managers, especially given impending anthropogenic climate change.
    Materialart: Online-Ressource
    ISSN: 0959-6836 , 1477-0911
    RVK:
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2018
    ZDB Id: 2027956-5
    SSG: 14
    SSG: 3,4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 3
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 2021
    In:  The Holocene Vol. 31, No. 8 ( 2021-08), p. 1288-1303
    In: The Holocene, SAGE Publications, Vol. 31, No. 8 ( 2021-08), p. 1288-1303
    Kurzfassung: Paleoclimate reconstructions for the western US show spatial variability in the timing, duration, and magnitude of climate changes within the Medieval Climate Anomaly (MCA, ca. 900–1350 CE) and Little Ice Age (LIA, ca. 1350–1850 CE), indicating that additional data are needed to more completely characterize late-Holocene climate change in the region. Here, we use dendrochronology to investigate how climate changes during the MCA and LIA affected a treeline, whitebark pine ( Pinus albicaulis Engelm.) ecosystem in the Greater Yellowstone Ecoregion (GYE). We present two new millennial-length tree-ring chronologies and multiple lines of tree-ring evidence from living and remnant whitebark pine and Engelmann spruce ( Picea engelmannii Parry ex. Engelm.) trees, including patterns of establishment and mortality; changes in tree growth; frost rings; and blue-intensity-based, reconstructed summer temperatures, to highlight the terminus of the LIA as one of the coldest periods of the last millennium for the GYE. Patterns of tree establishment and mortality indicate conditions favorable to recruitment during the latter half of the MCA and climate-induced mortality of trees during the middle-to-late LIA. These patterns correspond with decreased growth, frost damage, and reconstructed cooler temperature anomalies for the 1800–1850 CE period. Results provide important insight into how past climate change affected important GYE ecosystems and highlight the value of using multiple lines of proxy evidence, along with climate reconstructions of high spatial resolution, to better describe spatial and temporal variability in MCA and LIA climate and the ecological influence of climate change.
    Materialart: Online-Ressource
    ISSN: 0959-6836 , 1477-0911
    RVK:
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2021
    ZDB Id: 2027956-5
    SSG: 14
    SSG: 3,4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 4
    Online-Ressource
    Online-Ressource
    SAGE Publications ; 2011
    In:  Asia Pacific Journal of Public Health Vol. 23, No. 2_suppl ( 2011-03), p. 133S-143S
    In: Asia Pacific Journal of Public Health, SAGE Publications, Vol. 23, No. 2_suppl ( 2011-03), p. 133S-143S
    Kurzfassung: Although the implications of climate change for public health continue to be elucidated, we still require much work to guide the development of a comprehensive strategy to underpin the adaptation of the health system. Adaptation will be an evolving process as impacts emerge. The authors aim is to focus on the responses of the Australian health system to health risks from climate change, and in particular how best to prepare health services for predicted health risks from heat waves, bushfires, infectious diseases, diminished air quality, and the mental health impacts of climate change. In addition, the authors aim to provide some general principles for health system adaptation to climate change that may be applicable beyond the Australian setting. They present some guiding principles for preparing health systems and also overview some specific preparatory activities in relation to personnel, infrastructure, and coordination. Increases in extreme weather—related events superimposed on health effects arising from a gradually changing climate will place additional burdens on the health system and challenge existing capacity. Key characteristics of a climate change—prepared health system are that it should be flexible, strategically allocated, and robust. Long-term planning will also require close collaboration with the nonhealth sectors as part of a nationwide adaptive response.
    Materialart: Online-Ressource
    ISSN: 1010-5395 , 1941-2479
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2011
    ZDB Id: 2394975-2
    Standort Signatur Einschränkungen Verfügbarkeit
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