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Artículos de revistas sobre el tema "Paleoecology - Quaternary"

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Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 30 de enero de 2023

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1

Fontana, Sonia L. y Keith D. Bennett. "Quaternary paleoecology: Reconstructing past environments". Past Global Changes Magazine 22, n.º 1 (abril de 2014): 46. http://dx.doi.org/10.22498/pages.22.1.46.

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Fontana, Sonia L. y Keith D. Bennett. "Quaternary paleoecology: Reconstructing past environments". Past Global Change Magazine 23, n.º 2 (diciembre de 2015): 77. http://dx.doi.org/10.22498/pages.23.2.77.

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3

Heusser, C. J. "Quaternary paleoecology of Fuego-Patagonia". Revista do Instituto Geológico 15, n.º 1-2 (1994): 7–26. http://dx.doi.org/10.5935/0100-929x.19940002.

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4

Jackson, Stephen T. y Jessica L. Blois. "Community ecology in a changing environment: Perspectives from the Quaternary". Proceedings of the National Academy of Sciences 112, n.º 16 (21 de abril de 2015): 4915–21. http://dx.doi.org/10.1073/pnas.1403664111.

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Community ecology and paleoecology are both concerned with the composition and structure of biotic assemblages but are largely disconnected. Community ecology focuses on existing species assemblages and recently has begun to integrate history (phylogeny and continental or intercontinental dispersal) to constrain community processes. This division has left a “missing middle”: Ecological and environmental processes occurring on timescales from decades to millennia are not yet fully incorporated into community ecology. Quaternary paleoecology has a wealth of data documenting ecological dynamics at these timescales, and both fields can benefit from greater interaction and articulation. We discuss ecological insights revealed by Quaternary terrestrial records, suggest foundations for bridging between the disciplines, and identify topics where the disciplines can engage to mutual benefit.

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5

Maldonado, Antonio y Claudio Latorre. "International Workshop on Methods in Quaternary Paleoecology". PAGES news 16, n.º 1 (enero de 2008): 38. http://dx.doi.org/10.22498/pages.16.1.38.

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6

Delcourt, Paul A. y Hazel R. Delcourt. "Quaternary paleoecology of the Lower Mississippi Valley". Engineering Geology 45, n.º 1-4 (diciembre de 1996): 219–42. http://dx.doi.org/10.1016/s0013-7952(96)00015-4.

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7

Martínez, S. "Quaternary continental molluscs from Northern Uruguay: distribution and paleoecology". Quaternary International 114, n.º 1 (2004): 123–28. http://dx.doi.org/10.1016/s1040-6182(03)00047-8.

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8

Aksu, A. E. y P. J. Mudie. "Late Quaternary stratigraphy and paleoecology of northwest Labrador Sea". Marine Micropaleontology 9, n.º 6 (diciembre de 1985): 537–57. http://dx.doi.org/10.1016/0377-8398(85)90017-9.

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9

Martı́nez, Sergio, Martı́n Ubilla, Mariano Verde, Daniel Perea, Alejandra Rojas, Rosario Guérèquiz y Graciela Piñeiro. "Paleoecology and Geochronology of Uruguayan Coastal Marine Pleistocene Deposits". Quaternary Research 55, n.º 2 (marzo de 2001): 246–54. http://dx.doi.org/10.1006/qres.2000.2204.

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AbstractMinimum radiocarbon ages of marine Pleistocene molluscs from Uruguay range from 29,500±600 to 35,500±1900 14C yr B.P. Because knowledge of the marine Quaternary stratigraphy of Uruguay remains inadequate, no attempt is made to correlate between these deposits and recognized lithostratigraphic units. Analysis of the temperature and salinity ranges of the various molluscs suggests the establishment of a poly-euhaline fauna that inhabited waters warmer than present at the same latitude. This is supported by a northward retreat in the recent distribution of Chrysallida cf. C. gemmulosa, Nioche subrostrata, and probably Anomalocardia brasiliana. These marine Pleistocene deposits can probably be correlated with the last interglaciation (oxygen-isotopic substage 5e). At that time the fluvial-marine front of the Rio de la Plata was displaced much further northwestward than previously supposed. Chrysallida cf. C. gemmulosa and Limaria sp. are recorded in Uruguayan Quaternary deposits for the first time.

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10

Mancini, María. "Late Quaternary paleoecology in Southern Patagonia (46º-52º S), Argentina". Revista del Museo Argentino de Ciencias Naturales 5 (2003): 273–83. http://dx.doi.org/10.22179/revmacn.5.57.

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11

Talent, John A. y Ruth Mawson. "Teaching Reef Environments and Paleoecology on Contemporary and Quaternary Reefs". Journal of Geological Education 41, n.º 3 (mayo de 1993): 231–43. http://dx.doi.org/10.5408/0022-1368-41.3.231.

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12

Edwards, Mary E. "The maturing relationship between Quaternary paleoecology and ancient sedimentary DNA". Quaternary Research 96 (15 de junio de 2020): 39–47. http://dx.doi.org/10.1017/qua.2020.52.

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AbstractIn the two decades or so since ancient sedimentary DNA (sedaDNA) took its place as a new Quaternary paleo-proxy, there have been large advances in the scope of its applications and its reliability. The two main approaches, metabarcoding and shotgun sequencing, have contributed exciting insights into areas such as floristic diversity change, plant-herbivore interactions, extinction, conservation baselines and impacts of invasive species. Early doubts as to its potential to contribute novel information have been dispelled; more is now understood about the passage of sedaDNA from the original organism to a component of soil or sediment and about the range of uncertainties that must be addressed in the interpretation of data. With its move into the mainstream, it is now time to develop effective data archives for sedaDNA, refine our understanding of central issues such as taphonomy, and further expand the potential for describing, both qualitatively and quantitatively, the history of past ecosystems.

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13

Jackson, Stephen T. y John W. Williams. "MODERN ANALOGS IN QUATERNARY PALEOECOLOGY: Here Today, Gone Yesterday, Gone Tomorrow?" Annual Review of Earth and Planetary Sciences 32, n.º 1 (19 de mayo de 2004): 495–537. http://dx.doi.org/10.1146/annurev.earth.32.101802.120435.

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14

Morgan, Gary S. "Quaternary History of the Aucilla River, Florida: Paleoindians, Paleontology, and Paleoecology". Journal of Mammalian Evolution 15, n.º 3 (18 de enero de 2008): 209–13. http://dx.doi.org/10.1007/s10914-008-9072-z.

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15

Dredge, L. A., R. J. Mott y D. R. Grant. "Quaternary stratigraphy, paleoecology, and glacial geology, Îles de la Madeleine, Quebec". Canadian Journal of Earth Sciences 29, n.º 9 (1 de septiembre de 1992): 1981–96. http://dx.doi.org/10.1139/e92-154.

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On the Îles de la Madeleine, a rock platform as much as 20 m asl, locally with clam borings, is correlated to the regional interglacial surface at 2–8 m; its anomalous height may be a consequence of salt tectonics. Overlying lagoonal and paludal organic beds, one with Th/U ages of 89–101 ka, record the Sangamonian climatic optimum (substage 5e), which culminated in forest more thermophilous than that of the Holocene optimum. Overlying littoral gravel and sand, considered analogous to sediments in present-day tombolos, and organic beds with less temperate pollen types were deposited during the marine transgressive climax of substage 5e and thus indicate that sea level remained high after the thermal optimum, as in Holocene time. Cold-based Early Wisconsinan ice, probably centred on the Magdalen Shelf, tectonized bedrock and interglacial beds and deposited till upon them. Periglacial features indicate a subsequent long cold period. An organic bed dating from 11.3 to 10.6 ka records a warm interval followed by cooling. Buried peat, a submerged fossil sea cliff, and barrier beaches record a marine transgression during the late Holocene.

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16

ROYALL, P. DANIEL, PAUL A. DELCOURT y HAZEL R. DELCOURT. "Late Quaternary paleoecology and paleoenvironments of the Central Mississippi Alluvial Valley". Geological Society of America Bulletin 103, n.º 2 (febrero de 1991): 157–70. http://dx.doi.org/10.1130/0016-7606(1991)103<0157:lqpapo>2.3.co;2.

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17

Akaegbobi, Izuchukwu M. "West African paleoecology and human responses: West African Quaternary Research Association (WAQUA)". Quaternary International 262 (junio de 2012): 1. http://dx.doi.org/10.1016/j.quaint.2012.02.018.

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18

Tankersley, Kenneth Barnett, Madhav Krishna Murari, Brooke E. Crowley, Lewis A. Owen, Glenn W. Storrs y Litsa Mortensen. "Quaternary chronostratigraphy and stable isotope paleoecology of Big Bone Lick, Kentucky, USA". Quaternary Research 83, n.º 3 (mayo de 2015): 479–87. http://dx.doi.org/10.1016/j.yqres.2015.01.009.

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Big Bone Lick (BBL) in northern Kentucky, USA has been a critical geologic site in the historical development of North American Quaternary vertebrate paleontology since the 1700s. Sedimentology, geoarcheology, paleontology, accelerator mass spectrometry radiocarbon and optically stimulated luminescence dating, and stable carbon and nitrogen isotope analyses were undertaken to develop a chronostratigraphy and history of erosion and deposition for the site to provide a foundation for understanding taphonomy, and species extinction and adaptation to periods of climatic and environmental change. Three geomorphic surfaces are recognized at BBL representing significant periods of floodplain aggradation since the last glacial maximum (26.5–19 ka) dating to the Oldest Dryas (Tazewell, 25–19 ka), the Older Dryas (Cary, 14–12 ka), and late Holocene (5 ka to the present). Unconformities suggest significant periods of degradation during the transitions from cold and dry to warm and moist climates from the Oldest Dryas (Tazewell) to Bølling Oscillation, from the Older Dryas (Cary) to the Allerød, and from the Younger Dryas (Valders) to the Holocene Climatic Optimum. Increased anthropogenic activities since ~ 5 ka may have increased soil upland erosion and floodplain aggradation. Stable isotopes demonstrate that the landscape has been dominated by C 3 vegetation since the last glacial maximum.

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19

Kovach, Warren L. "Comparisons of multivariate analytical techniques for use in pre-quaternary plant paleoecology". Review of Palaeobotany and Palynology 60, n.º 3-4 (septiembre de 1989): 255–82. http://dx.doi.org/10.1016/0034-6667(89)90046-8.

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20

Ekdahl, Erik J. "Diatoms in Saline Lakes Paleoclimate and Paleoecology Interpretations". Paleontological Society Papers 13 (octubre de 2007): 149–68. http://dx.doi.org/10.1017/s1089332600001510.

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Average global temperatures are predicted to rise over the next century and changes in precipitation, humidity, and drought frequency will likely accompany this global warming. Understanding associated changes in continental precipitation and temperature patterns in response to global change is an important component of long-range environmental planning. For example, agricultural management plans that account for decreased precipitation over time will be less susceptible to the effects of drought through implementation of water conservation techniques.A detailed understanding of environmental response to past climate change is key to understanding environmental changes associated with global climate change. To this end, diatoms are sensitive to a variety of limnologic parameters, including nutrient concentration, light availability, and the ionic concentration and composition of the waters that they live in (e.g. salinity). Diatoms from numerous environments have been used to reconstruct paleosalinity levels, which in turn have been used as a proxy records for regional and local paleoprecipitation. Long-term records of salinity or paleoprecipitation are valuable in reconstructing Quaternary paleoclimate, and are important in terms of developing mitigation strategies for future global climate change. High-resolution paleoclimate records are also important in groundtruthing global climate simulations, especially in regions where the consequences of global warming may be severe.

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21

Asevedo, Lidiane, Alceu Ranzi, Risto Kalliola, Martti Pärssinen, Kalle Ruokolainen, Mário Alberto Cozzuol, Ednair Rodrigues do Nascimento et al. "Isotopic paleoecology (δ13C, δ18O) of late Quaternary herbivorous mammal assemblages from southwestern Amazon". Quaternary Science Reviews 251 (enero de 2021): 106700. http://dx.doi.org/10.1016/j.quascirev.2020.106700.

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22

Taggart, Ralph E. "The Effect of Vegetation Heterogeneity on Short Stratigraphic Sequences". Paleontological Society Special Publications 3 (1988): 147–71. http://dx.doi.org/10.1017/s2475262200004925.

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Barring the immense and growing literature on Quaternary pollen analysis, the vast majority of the work on the paleoecology of terrestrial systems has concentrated on the Neogene floras of the Pacific Northwest. Study of these floras began with the pioneering exploratory surveys in the last quarter of the 19th century and assumed essentially its modern form with the work of R.W. Chaney, initiated in the 1920, the detailed contributions of H.D. MacGinitie, the continuing productivity of D.I. Axelrod, and, most recently, J. Wolfe. Such a short listing necessarily leaves out the many contributions of patient floristic monographers for I wish to concentrate on floristic treatments that include a major paleoecological element.

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23

Dayan, T. "The Impact of Quaternary Paleoclimatic Change on the Carnivores of Israel". Water Science and Technology 27, n.º 7-8 (1 de abril de 1993): 497–504. http://dx.doi.org/10.2166/wst.1993.0587.

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The Quaternary is a period of considerable climatic change. Climatic fluctuations have been subject to numerous studies based on various scientific disciplines (e.g., geology, sedimentology, palynology) that now enable us to reconstruct the paleoclimates of the last glacial period with some accuracy. In Israel such studies tell us of shifts in both ambient temperatures and in humidity. These paleoclimatic changes had paleoecological effect. Studying the paleoecology of the fauna of Israel may give us a key to understanding the effects of past climatic shifts, and to predicting the impact of future climatic change in this country. Here I follow changes in distribution, diversity, and morphology of carnivores throughout the last glacial of Israel. Size increase and shifts in distribution occurred in some carnivore species, and overall there is a strong correlation between humidity and species diversity. Carnivores typically exhibit wide geographic distributions, and wide environmental tolerance. Therefore paleoecological effects of paleoclimatic shifts in carnivores may indicate similar effects in other, less euryecious, terrestrial mammals.

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24

Gajewski, K., R. J. Mott, J. C. Ritchie y K. Hadden. "Holocene vegetation history of Banks Island, Northwest Territories, Canada". Canadian Journal of Botany 78, n.º 4 (21 de abril de 2000): 430–36. http://dx.doi.org/10.1139/b00-018.

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Four pollen diagrams from Banks Island, Northwest Territories, provide the first records of the postglacial vegetation of the region. Chronologies are estimated from radiocarbon dates and by correlation of the exotic-pollen curves to data from the mainland. The pollen stratigraphies from all sites can be divided into three zones, where the middle zone, dating from 7000 to 2000 BP, corresponds to the warmest time. Although both the first and third zones correspond to cooler periods, the vegetation of the earliest zone was not identical to that of the latest, indicated by lower frequencies of key pollen types such as those of Dryas and Saxifraga.Key words: Banks Island, Holocene, pollen diagram, Arctic, paleoecology, Quaternary.

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25

Dyke, Arthur S. y John V. Matthews. "Stratigraphy and Paleoecology of Quaternary Sediments Along Pasley River, Boothia Peninsula, Central Canadian Arctic". Géographie physique et Quaternaire 41, n.º 3 (18 de diciembre de 2007): 323–44. http://dx.doi.org/10.7202/032689ar.

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ABSTRACT Quaternary sediments exposed along Pasley River consist of a lower marine deltaic sand overlain in succession by complexly interbedded tills and glaciomarine sediments (the lower glacigenic assemblage), by a mid-section fluvial gravel, by an upper marine deltaic sand, and by glaciomarine sediment and till (the upper glacigenic assemblage). The midsection fluvial gravels contain plant and insect fossils indicating a climate as warm as and perhaps warmer than present. The top of the gravel is more than 55 000 years old ; the unit is probably of Sangamonian age (>75 000 ka) and separates Wisconsinan from lllinoian glacial deposits. The deltaic sands that underlie both glacigenic assemblages indicate substantial crustal depression during glacial buildup episodes prior to arrival of ice at the site. This implies that the process of buildup was slow and involved glacier expansion into major marine basins. Glaciomarine beds of the lower glacigenic assemblage locally contain abundant detrital terrestrial organic material as well as marine molluscs. The terrestrial organic detritus, an unusual constituent of glaciomarine sediment, is thought to have been released into the sea from glacier ice. These terrestrial fossil asemblages exhibit compositional differences which vary with the sediment faciès and probably reflect taphonomic factors such as differential buoyancy of the fossils. The upper marine deltaic sands contain some "old " rebedded plant detritus and amber indicating a nearby source of Tertiary sediment, possibly equivalent in age to the Beaufort Formation. Other rebedded fossils from the upper deltaic unit may be the same age as the mid-section fluvial gravels.

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26

Araújo-Júnior, Hermínio Ismael de. "Classifying vertebrate assemblages preserved in Quaternary tank deposits: Implications for vertebrate taphonomy and paleoecology". Palaeogeography, Palaeoclimatology, Palaeoecology 445 (marzo de 2016): 147–52. http://dx.doi.org/10.1016/j.palaeo.2015.12.025.

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27

Cohen, Andrew S. "Putting our science to work in the 21st Century: new directions in applied paleobiology?" Paleontological Society Special Publications 6 (1992): 64. http://dx.doi.org/10.1017/s2475262200006249.

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The scientific community is in great need of input from paleontologists today in two key areas of societal concern: the historical basis of global change and losses of biodiversity. Paleontologists, with their unique perspective on rates of change in biotic communities and their training in filtering signal from noise in the fossil record, are the best placed scientists in biology to approach these problems from an historical viewpoint. In the classroom we give lip service to the central role of paleontology in understanding these problems. Yet with the exclusion of Quaternary (and particularly Recent) paleoecology from the mainstream of our field, we have abrogated this responsibility to other disciplines. Paleontologists are in danger of losing the opportunity to provide guidance on the very issues in paleontology where political interest and funding will lie in the not too distant future. As opportunities for employment of paleontologists in the petroleum industry fade, it is critical that academic paleontologists define new directions for graduate education in our field.The paleontological community needs to reincorporate Quaternary paleoecology into its mainstream, emphasizing the importance of a paleobiological perspective in environmental problem solving. As the developers of theory and methodology in the interpretation of the fossil record it is our responsibility to set the agenda as to how paleobiology should be utilized. Our professional societies should provide leadership as advocates for funding research and training in the new areas of applied paleobiology, lest paleobiology (as we define it) be marginalized and traditional paleontology programs be viewed by their home institutions as increasingly irrelevant. Employment opportunities in biostratigraphy are a thing of the past; applied paleontology must redefine itself for career opportunities at the top of the column, in such areas as recent climate change or the fossil record of human-induced ecological disturbances. The PIRLA Project (Paleoecological Investigation of Recent Lake Acidification) provides an excellent example of applying paleobiology to such problems, using the Recent diatoms, crustaceans, insects and pollen fossils to understand the chronology of the acid rain problem in eastern North America.Academic departments bear a responsibility to bring the important new applications of paleobiology into the classroom, demonstrating its societal relevance and training students to avail themselves of potential opportunities for paleobiologists in global change and biodiversity research. Recent developments in taphonomy or stratigraphic ordering of fossils could be extremely powerful tools if applied to environmental change problem solving. We need to make our students marketable by spending more time in the classroom teaching them about Recent diatom paleoecology and less on brachiopod biostratigraphy. Otherwise paleobiology may go the way of Egyptology.

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28

Marra, Maureen y Richard A. B. Leschen. "Late Quaternary paleoecology from fossil beetle communities in the Awatere Valley, South Island, New Zealand". Journal of Biogeography 31, n.º 4 (22 de marzo de 2004): 571–86. http://dx.doi.org/10.1046/j.1365-2699.2003.00998.x.

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29

Domingo, Laura, José Luis Prado y María Teresa Alberdi. "The effect of paleoecology and paleobiogeography on stable isotopes of Quaternary mammals from South America". Quaternary Science Reviews 55 (noviembre de 2012): 103–13. http://dx.doi.org/10.1016/j.quascirev.2012.08.017.

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30

Jackson, Stephen T. "Out of the Garden and into the Cooler? A Quaternary Perspective on Deep-Time Paleoecology". Paleontological Society Papers 6 (noviembre de 2000): 287–308. http://dx.doi.org/10.1017/s1089332600000814.

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Most of what we know about ecology inevitably comes from Late Quaternary ecosystems, particularly those of the past few decades. 20th Century ecosystems are the only ones for which we have direct observational and experimental studies. We can obtain detailed records of ecological dynamics at decade- to century-scales over the past few centuries using historical, permanent-plot, demographic, and paleoecological techniques, but only for a select few ecosystems. Radiocarbon-dated fossil assemblages provide records of ecological changes over the past 25,000 years. Because 14C-dating allows independent dating of the assemblages with precision of 50–500 years, detailed spatiotemporal patterns of change can be outlined, but these are limited to certain kinds of organisms and to regions with a high density of fossil sites. When we go beyond the radiocarbon barrier 30–40,000 years ago, the density of datable terrestrial assemblages decreases sharply, and our views of past ecosystems become murkier.

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31

Delcourt, Paul A. y Hazel R. Delcourt. "Late-Quaternary dynamics of temperate forests: Applications of paleoecology to issues of global environmental change". Quaternary Science Reviews 6, n.º 2 (enero de 1987): 129–46. http://dx.doi.org/10.1016/0277-3791(87)90030-8.

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32

Nielsen, Erik, Alan V. Morgan, Anne Morgan, R. J. Mott, N. W. Rutter y C. Causse. "Stratigraphy, paleoecology, and glacial history of the Gillam area, Manitoba". Canadian Journal of Earth Sciences 23, n.º 11 (1 de noviembre de 1986): 1641–61. http://dx.doi.org/10.1139/e86-153.

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Sections along the Nelson River in northern Manitoba, outcropping upstream and downstream from Limestone Dam, record a long succession of late Quaternary events. The oldest sediment exposed consists of sandy, nonfossiliferous Sundance till of northwestern provenance and related to a Kansan or Illinoian glaciation. The paleosol developed in the Sundance till is assigned to the Yarmouthian or Sangamon interglacial on its stratigraphic position and depth of weathering. Fossiliferous, clayey Amery till of eastern provenance overlies the Sundance till and underlies the nonglacial Nelson River sediments. Aspartic acid D/L ratios of wood fragments from the Nelson River sediments correlate with an aspartic acid D/L ratio of similar wood from the Missinaibi Formation in Ontario. Beetle analysis indicates the Nelson River sediments were deposited north of the tree line under conditions more severe than those found in the area today. The deposits are believed to be of latest Sangamon or possibly Mid-Wisconsinan age. The Wisconsinan Stage is represented by the Long Spruce and Sky Pilot tills deposited by ice from the east. These tills are texturally and compositionally similar but are different colours. The overlying Henday sediments record glaciofiuvial deposition and mass wasting along the eastward retreating ice margin. Varves indicate the area was covered by glacial Lake Agassiz for less than 100 years after the ice retreated. The breakup of the Laurentide Ice Sheet in Hudson Bay and the final drainage of Lake Agassiz took place 7800–8000 years ago when the Hudson Bay Lowland was inundated by the marine water of the Tyrrell Sea. The area emerged from the Tyrrell Sea about 6500 years BP.

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33

Croft, Darin A., Javier N. Gelfo y Guillermo M. López. "Splendid Innovation: The Extinct South American Native Ungulates". Annual Review of Earth and Planetary Sciences 48, n.º 1 (30 de mayo de 2020): 259–90. http://dx.doi.org/10.1146/annurev-earth-072619-060126.

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A remarkable diversity of plant-eating mammals known as South American native ungulates (SANUs) flourished in South America for most of the Cenozoic. Although some of these species likely filled ecological niches similar to those of modern hoofed mammals, others differed substantially from extant artiodactyls and perissodactyls in their skull and limb anatomy and probably also in their ecology. Notoungulates and litopterns were the longest-lived and most diverse SANU clades and survived into the Quaternary; astrapotheres went extinct in the late Miocene, whereas other SANU groups were restricted to the Paleogene. Neogene notoungulates were quite specialized in craniodental structure, but many were rather unspecialized postcranially; in contrast, litopterns evolved limb specializations early in their history while maintaining more conservative dentitions. In this article, we review the current understanding of SANU evolutionary relationships and paleoecology, provide an updated compilation of genus temporal ranges, and discuss possible directions for future research. ▪ South American native ungulates (SANUs) were a diverse, long-lived, and independent radiation of mammals into varied terrestrial plant-eater niches. ▪ We review origins, evolution, and paleoecology of the major SANU clades: Notoungulata, Litopterna, Astrapotheria, Xenungulata, and Pyrotheria. ▪ At their peak, during the Eocene and Oligocene, more than 40 genera of native ungulates inhabited South America at any one time. ▪ SANUs ranged from <1 kg to several tons and evolved many combinations of diet and locomotor adaptations not seen in living ungulates.

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34

Kováč, Michal, Jozef Hók, Jozef Minár, Rastislav Vojtko, Miroslav Bielik, Radovan Pipík, Miloš Rakús, Ján Kráľ, Martin Šujan y Silvia Králiková. "Neogene and Quaternary development of the Turiec Basin and landscape in its catchment: a tentative mass balance model". Geologica Carpathica 62, n.º 4 (1 de agosto de 2011): 361–79. http://dx.doi.org/10.2478/v10096-011-0027-6.

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Neogene and Quaternary development of the Turiec Basin and landscape in its catchment: a tentative mass balance modelThe development of the Turiec Basin and landscape evolution in its catchment has been reconstructed by methods of geological research (structural geology, sedimentology, paleoecology, and geochronological data) as well as by geophysics and geomorphology. The basin and its surrounding mountains were a subject of a mass balance study during periods of tectonic activity, accompanied by considerable altitudinal differentiation of relief and also during quiet periods, characterized by a development of planation surfaces in the mountains. The coarse clastic alluvial fans deposited beneath the offshore pelitic sediments document the rapid Middle Miocene uplift of mountains on the margin of the Turiec Basin. The Late Miocene finegrained sedimentation represents the main fill of this basin and its origin was associated with the formation of planation surfaces in the surrounding mountains. The rapid uplift of the western and northern parts of the catchment area during the latest Miocene and Early Pliocene times further generated the deposition of coarse-grained alluvial fans. The Late Pliocene basin inversion, due to uplift of the whole Western Carpathians mountain chain, was associated with the formation of the Early Quaternary pediment and ultimately with the formation of the Turiec river terrace systems.

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35

Aguirre, Marina L., Yamila Negro Sirch y Sebastián Richiano. "Late Quaternary molluscan assemblages from the coastal area of Bahía Bustamante (Patagonia, Argentina): Paleoecology and paleoenvironments". Journal of South American Earth Sciences 20, n.º 1-2 (octubre de 2005): 13–32. http://dx.doi.org/10.1016/j.jsames.2005.05.006.

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36

Hooghiemstra, Henry y Thomas van der Hammen. "Late quaternary vegetation history and paleoecology of Laguna Pedro Palo (subandean forest belt, Eastern Cordillera, Colombia)". Review of Palaeobotany and Palynology 77, n.º 3-4 (junio de 1993): 235–62. http://dx.doi.org/10.1016/0034-6667(93)90006-g.

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37

Wooller, Matthew, Yiming Wang y Yarrow Axford. "A multiple stable isotope record of Late Quaternary limnological changes and chironomid paleoecology from northeastern Iceland". Journal of Paleolimnology 40, n.º 1 (2 de octubre de 2007): 63–77. http://dx.doi.org/10.1007/s10933-007-9144-8.

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38

Yu, Zicheng. "Late Quaternary paleoecology of Thuja and Juniperus (Cupressaceae) at Crawford Lake, Ontario, Canada: pollen, stomata and macrofossils". Review of Palaeobotany and Palynology 96, n.º 3-4 (mayo de 1997): 241–54. http://dx.doi.org/10.1016/s0034-6667(96)00060-7.

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39

Verschuren, Dirk y Hilde Eggermont. "Quaternary paleoecology of aquatic Diptera in tropical and Southern Hemisphere regions, with special reference to the Chironomidae". Quaternary Science Reviews 25, n.º 15-16 (agosto de 2006): 1926–47. http://dx.doi.org/10.1016/j.quascirev.2006.01.008.

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40

Pansani, Thaís Rabito, Fellipe Pereira Muniz, Alexander Cherkinsky, Mírian Liza Alves Forancelli Pacheco y Mário André Trindade Dantas. "Isotopic paleoecology (δ13C, δ18O) of Late Quaternary megafauna from Mato Grosso do Sul and Bahia States, Brazil". Quaternary Science Reviews 221 (octubre de 2019): 105864. http://dx.doi.org/10.1016/j.quascirev.2019.105864.

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41

Li, Chenzhi, Alexander K. Postl, Thomas Böhmer, Xianyong Cao, Andrew M. Dolman y Ulrike Herzschuh. "Harmonized chronologies of a global late Quaternary pollen dataset (LegacyAge 1.0)". Earth System Science Data 14, n.º 3 (24 de marzo de 2022): 1331–43. http://dx.doi.org/10.5194/essd-14-1331-2022.

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Abstract. We present a chronology framework named LegacyAge 1.0 containing harmonized chronologies for 2831 pollen records (downloaded from the Neotoma Paleoecology Database and the supplementary Asian datasets) together with their age control points and metadata in machine-readable data formats. All chronologies use the Bayesian framework implemented in Bacon version 2.5.3. Optimal parameter settings of priors (accumulation.shape, memory.strength, memory.mean, accumulation.rate, and thickness) were identified based on information in the original publication or iteratively after preliminary model inspection. The most common control points for the chronologies are radiocarbon dates (86.1 %), calibrated by the latest calibration curves (IntCal20 and SHCal20 for the terrestrial radiocarbon dates in the Northern Hemisphere and Southern Hemisphere and Marine20 for marine materials). The original publications were consulted when dealing with outliers and inconsistencies. Several major challenges when setting up the chronologies included the waterline issue (18.8 % of records), reservoir effect (4.9 %), and sediment deposition discontinuity (4.4 %). Finally, we numerically compare the LegacyAge 1.0 chronologies to those published in the original publications and show that the reliability of the chronologies of 95.4 % of records could be improved according to our assessment. Our chronology framework and revised chronologies provide the opportunity to make use of the ages and age uncertainties in synthesis studies of, for example, pollen-based vegetation and climate change. The LegacyAge 1.0 dataset, including metadata, datings, harmonized chronologies, and R code used, is open-access and available at PANGAEA (https://doi.org/10.1594/PANGAEA.933132; Li et al., 2021) and Zenodo (https://doi.org/10.5281/zenodo.5815192; Li et al., 2022), respectively.

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42

Keenan, T. J. y L. C. Cwynar. "Late Quaternary history of black spruce and grasslands in southwest Yukon Territory". Canadian Journal of Botany 70, n.º 7 (1 de julio de 1992): 1336–45. http://dx.doi.org/10.1139/b92-168.

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Pollen records from Long Last Lake and Two Horsemen Pond, near the centre of the arid region of southwest Yukon Territory, do not support the hypotheses that (i) black spruce was a dominant species in the region and (ii) the southwest Yukon supported widespread grasslands during most of the past 10 000 years. Black spruce became established between 8500 and 8000 BP, shortly after the arrival of white spruce, but its low pollen percentages (< 5%) indicate that it was a minor component of forests. Between 6000 and 5000 BP, white spruce populations decreased as black spruce and green alder increased, but black spruce remained a minor constituent of the forest, never becoming a dominant species as at Kettlehole Pond near the southeast margin of the arid southwest Yukon. The initial vegetation was a poplar woodland, dating from 9200 to 8500 BP at Long Last Lake. At both Long Last Lake and Two Horsemen Pond, the high percentages of herb pollen indicate that the forest was open, but the low values of grass pollen suggest that grasslands were not extensive. Coincident with the establishment of spruce woodland at 8500 BP, pollen of herbs declines and remains comparatively low until 1300 BP when herbs, including grasses, increase to maximum values for the period of record, indicating the grassland communities were probably never more abundant during the Holocene than they are now. Key words: southwest Yukon, black spruce, pollen analysis, paleoecology, climate change.

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43

Steadman, David W. y Janet Franklin. "Origin, paleoecology, and extirpation of bluebirds and crossbills in the Bahamas across the last glacial–interglacial transition". Proceedings of the National Academy of Sciences 114, n.º 37 (28 de agosto de 2017): 9924–29. http://dx.doi.org/10.1073/pnas.1707660114.

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On low islands or island groups such as the Bahamas, surrounded by shallow oceans, Quaternary glacial–interglacial changes in climate and sea level had major effects on terrestrial plant and animal communities. We examine the paleoecology of two species of songbirds (Passeriformes) recorded as Late Pleistocene fossils on the Bahamian island of Abaco—the Eastern bluebird (Sialia sialis) and Hispaniolan crossbill (Loxia megaplaga). Each species lives today only outside of the Bahamian Archipelago, with S. sialis occurring in North and Central America and L. megaplaga endemic to Hispaniola. Unrecorded in the Holocene fossil record of Abaco, both of these species probably colonized Abaco during the last glacial interval but were eliminated when the island became much smaller, warmer, wetter, and more isolated during the last glacial–interglacial transition from ∼15 to 9 ka. Today’s warming temperatures and rising sea levels, although not as great in magnitude as those that took place from ∼15 to 9 ka, are occurring rapidly and may contribute to considerable biotic change on islands by acting in synergy with direct human impacts.

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44

Morgan, Alan V., Marian Kuc y John T. Andrews. "Paleoecology and age of the Flitaway and Isortoq interglacial deposits, north-central Baffin Island, Northwest Territories, Canada". Canadian Journal of Earth Sciences 30, n.º 5 (1 de mayo de 1993): 954–74. http://dx.doi.org/10.1139/e93-080.

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Peats and woody-detrital deposits at two localities close to the Barnes Ice Cap at approximately 70°N contain insect faunas and mosses that indicate that these sites were situated close to tree line during the period of deposition. Modern tree line occurs some 1325 km (820 mi) to the south and southwest of these sites. Attempts to provide numeric ages based on the U-series of woody fragments were not successful. Although it has been assumed in the past that these peats were laid down during the last interglaciation, the inferred paleoclimatic conditions based on the insect faunas and plant remains suggest a substantially older (possible late Tertiary to mid Quaternary) age. The Flitaway and Isortoq sites probably had an annual average temperature at the time of deposition which was between −8 and −9 °C, i.e., about 4 – 5 °C warmer than today. Such information is important to calibrate and check global climatic models that predict substantial high-latitude greenhouse-gas warming.

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45

Hu, Feng Sheng, Linda B. Brubaker y Patricia M. Anderson. "A 12 000 year record of vegetation change and soil development from Wien Lake, central Alaska". Canadian Journal of Botany 71, n.º 9 (1 de septiembre de 1993): 1133–42. http://dx.doi.org/10.1139/b93-133.

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Pollen, plant-macrofossil, macroscopic-charcoal, and geochemical analyses of a sediment core from Wien Lake provide new information on the late Quaternary environmental history of central Alaska. Shrub tundra dominated by Betula glandulosa occupied the area 12 000 – 10 500 BP. Low plant cover and intensive soil erosion of the tundra landscape are indicated by low pollen-accumulation rates, high sediment inorganic content, and high allogenic elemental concentrations. Around 10 500 BP, Populus and Salix invaded the shrub tundra and open ground to form dense stands within the lake catchment. The marked increases in sediment organic content and authigenic concentrations of Fe, Mn, and Al during the period of Populus–Salix dominance suggest humic buildup and stabilization of the catchment soils. These soil changes in turn may have contributed to the demise of Populus–Salix communities 9500 BP. Fossil seeds indicate that Betula papyrifera arrived 9500 BP, rather than in the middle to late Holocene as suggested by previous palynological studies. Picea glauca codominated open woodlands with B. papyrifera 9500 – 7500 BP. The decline of Picea glauca 7500 BP was probably due to an episode of climatic cooling rather than autogenic processes resulting in waterlogged soils. Alnus arrived in the region 7500 BP. After 6500 BP, modern boreal forest dynamics are indicated by the dominance of Picea mariana, fluctuations of Picea glauca, and frequent occurrence of local fires. Key words: late Quaternary paleoecology, Alaska, vegetation and soil history, pollen, plant-macrofossils, geochemistry.

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46

Faith, J. Tyler, Jonah N. Choiniere, Christian A. Tryon, Daniel J. Peppe y David L. Fox. "Taxonomic status and paleoecology of Rusingoryx atopocranion (Mammalia, Artiodactyla), an extinct Pleistocene bovid from Rusinga Island, Kenya". Quaternary Research 75, n.º 3 (mayo de 2011): 697–707. http://dx.doi.org/10.1016/j.yqres.2010.11.006.

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AbstractRusingoryx atopocranion is a poorly known extinct alcelaphine bovid, documented in Pleistocene deposits associated with Middle Stone Age artifacts on Rusinga Island, Kenya. Following its initial description, Rusingoryx was subsumed into Megalotragus, which includes the extinct giant wildebeests, on the basis of its cranial architecture. Renewed investigations of the Pleistocene deposits on Rusinga Island recovered a large sample of Rusingoryx specimens that provide new taxonomic and paleoecological insight. This study (1) reviews the morphological and phylogenetic evidence concerning the taxonomic status of Rusingoryx and (2) evaluates its paleoecology and dietary habits. The morphology and phylogenetic data indicate that Rusingoryx is distinct from Megalotragus; they likely shared a common ancestor in the late Pliocene. Ecomorphology and mesowear analysis point to a specialized grazing adaptation, and its association with arid-adapted ungulates suggests a preference for arid grasslands. The confirmation of Rusingoryx as a valid taxonomic entity, together with the presence of other extinct taxa (including Megalotragus) on Rusinga Island, suggests an increasingly complex pattern of ungulate biogeography and extinctions in the late Quaternary of East Africa. Rusingoryx appears to have been part of an arid-adapted faunal community that potentially persisted in East Africa until the onset of the Holocene.

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47

Pelegrin, Jonathan S., Silvia A. Quijano, Leonardo Belalcázar, Alberto Benavides-Herrán, Sebastián Escobar-Flórez, Dimila Mothé y Leonardo dos Santos Avilla. "Report on mandibular remains of Notiomastodon platensis (Mammalia, Proboscidea) and review of its fossil record in the paleoecological context of Valle del Cauca, Colombia". Revista Brasileira de Paleontologia 25, n.º 1 (12 de abril de 2022): 90–100. http://dx.doi.org/10.4072/rbp.2022.1.07.

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The Proboscidea were very prominent in South American ecosystems during the Pleistocene and part of the Holocene. Specifically, in Valle del Cauca (Colombia), fossils of these large mammals have been found, reflecting an abundant presence in the region. In this work, a mandibular fragment with a complete last molar (m3) is reported, found near the bed of the Cauca River, in the Juanchito municipality of Santiago de Cali. According to the morphological features of the specimen, it is proposed that the remains belong to the proboscidean Notiomastodon platensis. This study emphasizes the large geographical distribution of this proboscidean in South America, including the Valle del Cauca, and provides new information on its presence in Colombia. In a paleoecological context, this work supports a generalist condition based on the use of food resources associated with the tropical dry forest during the processes of glacial and interglacial fluctuation that this type of ecosystem experienced during the Pleistocene epoch and that led to various changes in habitat aridity, fragmentation, and heterogeneity. Keywords: Notiomastodon, Quaternary, paleoecology, megafauna, South America.

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48

Lyman, R. Lee. "Paleoecological and biogeographical implications of late Pleistocene noble marten (Martes americana nobilis) in eastern Washington State, USA". Quaternary Research 75, n.º 1 (enero de 2011): 176–82. http://dx.doi.org/10.1016/j.yqres.2010.09.010.

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AbstractA mandible identified as noble marten (Martes americana nobilis) recovered from sediments dating to 11,800 cal yr BP and a humerus identified as M. a. cf. nobilis recovered from sediments dating from 13,100 to 12,500 cal yr BP at the Marmes Rockshelter archaeological site in southeastern Washington represent the first record of this taxon in the state. Mammalian taxa associated with the Marmes Rockshelter noble marten represent a diversity of open mesic habitats corroborating earlier analyses of other records of the noble marten in the western United States and exemplify how paleozoologists determine the ecology and environmental predilections of extinct taxa. The recovery site represents the topographically lowest record of this species in western North America and the farthest north record in the United States. Future research should examine known late-Quaternary Martes spp. remains from British Columbia and Alberta to fill in the 2200-km geographic gap in the known distribution of this taxon between a record in the northern Yukon and those in the western United States, and to refine our knowledge of noble marten paleoecology.

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49

Reuther, Joshua D., Ben A. Potter, Charles E. Holmes, James K. Feathers, François B. Lanoë y Jennifer Kielhofer. "The Rosa-Keystone Dunes Field: The geoarchaeology and paleoecology of a late Quaternary stabilized dune field in Eastern Beringia". Holocene 26, n.º 12 (28 de julio de 2016): 1939–53. http://dx.doi.org/10.1177/0959683616646190.

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Stabilized sand sheets and dunes hold a remarkable amount of information on paleoenvironmental conditions under which late Quaternary landscapes evolved in northern subarctic regions. We provide the results of a project focused on understanding the development of lowland environments and ecosystems, including dunes and sand sheets, which were critical habitat for early human occupations in subarctic regions. Our study area is the Rosa-Keystone Dunes Field in the Shaw Creek Flats of the middle Tanana River basin, interior Alaska, one of the oldest continuously occupied areas in North America (14,000 cal. BP to present). The disturbance regimes of reactivated dunes and associated forest fire cycles between 12,500 and 8800 cal. BP fostered a unique early to mid-successional mixed vegetation community including herbaceous tundra, shrubs, and deciduous trees. This environment provided key habitats for large grazers and browsers, significant resources for early hunter-gatherer populations in central Alaska. After 8000 cal. BP, the expansion of black spruce and peatlands heightened landscape stability but decreased the range of local habitat for large grazers. Hunter-gatherer economic change during these periods is consistent with human responses to local and regional landscape disturbance and restructuring.

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50

Scarponi, Daniele y Michal Kowalewski. "Stratigraphic paleoecology: Bathymetric signatures and sequence overprint of mollusk associations from upper Quaternary sequences of the Po Plain, Italy". Geology 32, n.º 11 (2004): 989. http://dx.doi.org/10.1130/g20808.1.

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