Academic literature on the topic 'Paleo ecology'

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Journal articles on the topic "Paleo ecology"

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Kohn, M. J. "Carbon isotope compositions of terrestrial C3 plants as indicators of (paleo)ecology and (paleo)climate." Proceedings of the National Academy of Sciences 107, no. 46 (November 1, 2010): 19691–95. http://dx.doi.org/10.1073/pnas.1004933107.

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Pelejero, Carles, Eva Calvo, and Ove Hoegh-Guldberg. "Paleo-perspectives on ocean acidification." Trends in Ecology & Evolution 25, no. 6 (June 2010): 332–44. http://dx.doi.org/10.1016/j.tree.2010.02.002.

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Denbow, James, Jeannette Smith, Nonofho Mathibidi Ndobochani, Kirsten Atwood, and Duncan Miller. "Archaeological excavations at Bosutswe, Botswana: cultural chronology, paleo-ecology and economy." Journal of Archaeological Science 35, no. 2 (February 2008): 459–80. http://dx.doi.org/10.1016/j.jas.2007.04.011.

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Henry, Donald O. "Prehistoric human ecology in the Southern Levant east of the Rift from 20 000-6 000 BP." Paléorient 23, no. 2 (1997): 107–19. http://dx.doi.org/10.3406/paleo.1997.4655.

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Löser, Hannes. "Database applications in coral research." Paleontological Society Papers 1 (October 1996): 207–47. http://dx.doi.org/10.1017/s1089332600000115.

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Data on extant and fossil corals are analyzed. The characteristics of the organisms are divided into five basic units of data: morphology, ecology, taxonomical relations, stratigraphical, and (paleo-) geographical occurrence. Six data complexes are derived from these units. Their relationships are defined and the database structures designed on the basis of the Entity-Relationship-Model. The data structures are described in detail and advice is given for building up databases. The various opportunities of querying the database and particularly of assessing the data are thoroughly discussed. Data obtainable by transactions on the stratigraphical and (paleo-) geographical distribution of the organisms are considered. Finally, the database on Mesozoic corals compiled by the author is introduced and some preliminary results as well as future projects are presented.
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HOFMANN, CHRISTA-CHARLOTTE, and REINHARD ZETTER. "Reconstruction of Different Wetland Plant Habitats of the Pannonian Basin System (Neogene, Eastern Austria)." PALAIOS 20, no. 3 (June 1, 2005): 266–79. http://dx.doi.org/10.2110/palo.2002.p02-22.

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Abstract Sedimentary and palynofacies analysis, total organic carbon content (TOC), and palynology from a densely sampled, small, lignite-bearing succession of Late Miocene age at Badersdorf, SE Austria, were compared with modern wetland ecologies. From this, six hydrologically controlled palynofacies types and six associated paleo-plant habitats in an ancient wetland system were differentiated. The associated woody and herbaceous hinterland flora also were distinguished. At least four horizons with relatively high fusinite content have been preserved, indicating occurrence of paleo-wildfires in either the wetland or the hinterland. The palynofacies types were used to determine the taphonomic bias of the associated palynomorph assemblages, which, together with a comparison with modern wetland vegetation, led to differentiation of the paleo-plant habitats. The paleo-wetland was dominated mainly by Glyptostrobus-containing vegetation, and comprised clastic swamp forests with woody angiosperms, natural levee forests, fern- and Glyptostrobus-dominated organic swamps, freshwater marshes, and wet prairies. The occurrence of more than 40 herbaceous taxa at this locality indicates that the lowland vegetation was not composed of only different closed-forest types, but also of areas with herbaceous vegetation. The more zonal vegetation of the adjacent hinterland has been interpreted as a mix of Pinaceae and woody angiosperms with patches of more herbaceous xeric layers.
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Kolodny, Yehoshua, Ran Calvo, and Daniel Rosenfeld. "“Too low” δ18O of paleo-meteoric, low latitude, water; do paleo-tropical cyclones explain it?" Palaeogeography, Palaeoclimatology, Palaeoecology 280, no. 3-4 (September 2009): 387–95. http://dx.doi.org/10.1016/j.palaeo.2009.06.025.

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Stace, Helen M., Andrew W. Douglas, and Jane F. Sampson. "Did ‘Paleo-polyploidy’ Really occur in Proteaceae?" Australian Systematic Botany 11, no. 4 (1998): 613. http://dx.doi.org/10.1071/sb98013.

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Cytological data for 188 species in 65 genera of Proteaceae were collated from the literature. Excluding the occasional infrageneric polyploid, Proteaceae have seven confirmed character states for chromosome number (n = 14, 13, 12, 11, 10, 7, 5). Genera of subfamily Persoonioideae are x = 7, and, on a cytoevolutionary doctrine of ‘paleo-polyploidy’ in angiosperm families, these low chromosome number taxa were hypothesised to represent the ancestral genome of Proteaceae. Chief supporting evidence for this hypothesis is the ancient origin of Persoonioideae in Proteaceae phylogeny. However all current genomes in Proteaceae have features that suggest that they are derived, including those of Persoonioideae with their ‘genomic obesity’, and by reference to the chromosomes of Bellendenoideae (n = 5) and the outgroup Platanaceae (n = 21), quite probably their number is also a derived character state. Furthermore the high chromosome number genera of Proteaceae in subfamilies Proteoideae and Grevilleoideae (n = 14, 13, 12, 11, 10) have genomic lengths that are far smaller than would be expected from a doubling of the chromosomes of Persoonioideae, and, so far as any information is available, these genera are also genetic diploids. This paper questions ‘paleo-polyploidy’ as a general cytogenetic mechanism for plant macroevolution at the levels of genus, tribe and sub-family in Proteaceae. It is proposed that diploid cytoevolutionary processes of chromosome number increase and decrease from a primitive genome of FN = 24, with specific examples of x = 12 and x = 21, can explain the cytological phenomena in the family.
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Freeman, Jacob, Erick Robinson, Noelle G. Beckman, Darcy Bird, Jacopo A. Baggio, and John M. Anderies. "The global ecology of human population density and interpreting changes in paleo-population density." Journal of Archaeological Science 120 (August 2020): 105168. http://dx.doi.org/10.1016/j.jas.2020.105168.

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Taylor, Ben J., James W. B. Rae, William R. Gray, Kate F. Darling, Andrea Burke, Rainer Gersonde, Andrea Abelmann, Edith Maier, Oliver Esper, and Patrizia Ziveri. "Distribution and ecology of planktic foraminifera in the North Pacific: Implications for paleo-reconstructions." Quaternary Science Reviews 191 (July 2018): 256–74. http://dx.doi.org/10.1016/j.quascirev.2018.05.006.

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Dissertations / Theses on the topic "Paleo ecology"

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Angst, Delphine. "Successeurs des dinosaures ? Paléobiologie et paléoécologie d’un oiseau géant terrestre du Paléogène." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10247.

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Les Gastornithidae sont des oiseaux géants terrestres présents dans le Tertiaire (Paléocène- Eocène) d'Europe, d'Amérique du Nord et d'Asie. Bien que ces oiseaux soient connus depuis le 19ème siècle, leur écologie et les environnements dans lesquels ils vivaient sont encore très mal connus. Cette thèse propose donc d'apporter des réponses sur ces deux points afin de mieux comprendre ces oiseaux grâce à une approche pluridisciplinaire, combinant des études de morphologie-fonctionnelle, de géochimie isotopique, et de paléontologie. Nous avons pu déterminer que cet oiseau de deux mètres de haut devait peser entre 110 et 260 kg, et avait un déplacement relativement lent ne lui permettant pas de courir rapidement et longtemps. Le régime alimentaire des Gastornithidae, en débat depuis plus de vingt ans, a été ré-étudié grâce à une étude de géochimie isotopique combinée à une étude de morphologie fonctionnelle, permettant de conclure à une alimentation herbivore. Parallèlement, les paléo-environnements dans lesquels évoluaient cet oiseau ont également pu être étudiés grâce une étude de géochimie isotopique appliquée à des coquilles d'oeufs fossiles du Sud de la France attribuées à Gastornis dans cette thèse. Ces grands oiseaux vivaient donc dans un environnement relativement sec et chaud avec probablement une alternance de saison sèche et humide pour le Sud de la France, ce qui est différent de ce qu'on connait pour des environnements du centre de l'Allemagne où d'autres fossiles de Gastornis ont été trouvés, et où la végétation montre un environnement plus humide. Cela montre donc que cet oiseau avait une bonne capacité d'adaptation à différents environnements, ce qui lui a probablement permis de franchir le PETM sans être particulièrement affecté, comme le montre le registre fossile dans lequel aucune extinction, aucune variation géographique ou anatomique ne sont observées dans cette famille contrairement au cas de nombreux mammifères
Gastornithidae are a familly of large ground fossils birds present in the Tertiary (Paleocene- Eocene) from Europe, North America and Asia. Although these birds are known since the beginning of the 19th century, their ecology and the environment where they lived are still poorly known. Therefore, this PhD propose to bring some answers about this two points in order to better understand these birds using a multidisciplinary approach, including functional morphology, isotope geochemistry and paleontological studies. We have determined that this two meter high bird should weigh around 110 to 260 kg, and had a relatively slow locomotion not allowing him to run quickly and for a long time. The diet of the Gastornithidae, discussed since more twenty years, has been studied using an isotopic geochemical approach combine with a morphofunctional study, which permits to conclude to an herbivore diet. In parallel, paleo-environments where lived this bird have also been studied using isotopical analysis applied on fossils bird’s eggshells from the southern France, attributed to Gastornis in this thesis. Thus these large birds lived in an environment relatively dry and hot, with probably an alternance of dry and wet saison in the southern France, which is different than which is known in middle Germany environments where other Gastornis fossils were found, and where vegetation shows an environment wetter. Therefore, that shows that this bird had a good adaptability to different environments, which allowed him to cross the PETM without being particularly affected as shown in the fossil record, on the contrary to numerous mammals
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KRAUSE, RICHARD ALAN. "EARLY MISSISSIPPIAN CARBONATE BUILDUPS IN SOUTHERN KENTUCKY, USA: PALEOECOLOGIC AND SEQUENCE STRATIGRAPHIC INTERPRETATIONS." University of Cincinnati / OhioLINK, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1022270630.

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Kernan, James T. "GIS analyses of paleo-fire regimes in ponderosa pine (Pinus ponderosa) forests extending spatial approaches in ecological interpretation /." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10045.

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Thesis (Ph. D.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains xii, 174 p. : ill. (some col.), col. maps. Includes abstract. Includes bibliographical references.
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Flaux, Clément. "Paléo-environnements littoraux Holocène du lac Maryut, nord-ouest du delta du Nil, Egypte." Thesis, Aix-Marseille, 2012. http://www.theses.fr/2012AIXM3011/document.

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La cité d'Alexandrie s'est développée sur un cordon littoral étroit, baigné au sud par le Maryut, lagune du delta du Nil qui s'est trouvée ainsi au coeur de l'économie industrielle et commerciale de la cité et de son arrière-pays depuis l'antiquité jusqu'à aujourd'hui. Dans ce riche contexte géo-archéologique, l'objectif de cette thèse de géomorphologie littorale a été de proposer une clef de lecture environnementale de l'histoire de l'occupation de la région du Maryut. L'analyse bio-sédimentologique des archives sédimentaires datées au radiocarbone, ainsi que la mesure du rapport isotopique du strontium dans des coquilles d'ostracode ont été utilisées pour reconstituer l'évolution hydrologique et géographique de la lagune à l'Holocène. La dépression du Maryut est transgressée par la mer vers 7,5 ka cal. BP. Les apports du Nil deviennent ensuite progressivement dominant dans le budget hydrologique, parallèlement à la progradation du littorale deltaïque. A partir de 5,5 ka cal. BP, nos données décrivent le retour progressif de conditions marines dominantes, associées à la réduction des débits du Nil, dans le contexte de la terminaison de la Période Africaine Humide. Cette lagune marine apparaît pérenne jusque 3ka cal BP, puis, dans le courant du 3ème millénaire BP, les intrants nilotiques redeviennent prépondérant. Ensuite, les archives sédimentaires et les données historiques disponibles décrivent une histoire environnementale contrastée est apparue corrélée à des phases de dynamisme et de récession agricole et met en évidence, selon nous, l'impact croissant des pratiques d'irrigation sur le fonctionnement du Maryut, situé en terminaison de la chaîne hydraulique
The ancient city of Alexandria was founded upon a narrow beach ridge, washed by the Maryut to the south. This Nile delta lagoon has been at the heart of the industrial and commercial economies of the city from Antiquity through to present day. Against the backdrop of this rich geoarchaeological context, the aim of this coastal geomorphology thesis is to elucidate the environmental history of the Maryut region.We have reconstructed the hydrological and geographical evolution of the lagoon during the Holocene using: (1) bio-sedimentology of radiocarbon-dated sediment archives; and (2) strontium isotopes in ostracod shells. The Maryut basin was transgressed by the sea around 7.5 ka cal. BP. Progressively, Nile inputs became dominant in the lagoon's hydrological budget, concomitant with the coastal progradation of the delta. After 5.5 ka cal. BP, our data attest to a gradual return to dominant marine conditions, which we link to a reduction in Nile flow in the context of the end of the African Humid Period. This marine lagoon seems to have been perennial until 3 ka cal. BP before Nile inflow became dominant, from the 3rd millennium BP until 0.8-0.9 ka cal. BP. The sediment archives and the historical data support an important retraction of the waterbody around 1 ka cal. BP, recorded by evaporite deposits. This was followed by a new highstand around 0.7 ka cal. BP before a retraction centred on 0.3-0.2 ka cal. BP. Since around 2000 years, this contrasting environmental history is correlated with phases of agriculture peaks and recessions and shows the increasing impact of irrigation practices on the functioning of the Maryut, located at the end of the hydrological conveyor
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Petrocchi, Francesca. "Paleo- ecologia dei Foraminiferi in ambiente estremo: un caso di studio in Antartide." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9763/.

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Nel presente lavoro sono state analizzate le distribuzioni quantitative dei Foraminiferi planctonici e bentonici presenti in una carota e in un box core prelevati nel Mare di Ross in Antartide durante la campagna KOPRI ANTA03 nel Febbraio 2013 nell’ambito del progetto di ricerca congiunto Corea- Italia finanziato dal Progetto Nazionale di Ricerca in Antartide (PNRA). Scopo del lavoro è stato quello di comprendere l’evoluzione ambientale dell’area in base alla distribuzione quantitativa e qualitativa delle associazioni a Foraminiferi nel tardo Quaternario. In base alla distribuzione quantitativa dei Foraminiferi identificati, la sequenza sedimentaria della carota C2 è stata suddivisa in tre intervalli corrispondenti a tre principali fasi paleoceanografiche/paleoclimatiche. La prima fase, più antica di 18 ka, caratterizzata dall’assenza o rarità di forme documenta un ambiente con presenza di copertura glaciale. La seconda, depositatasi tra 18 ka e ~8 ka è caratterizzata da una maggiore variabilità intraspecifica e riflette un miglioramento delle condizioni climatiche. La terza, corrisponde ad un periodo compreso tra ~8 ka e ~2 ka. La presenza di forme agglutinanti e l’assenza di Foraminiferi a guscio calcareo suggeriscono la presenza di condizioni di dissoluzione carbonatica sul fondale in un ambiente marino libero da copertura glaciale. La documentazione di numerosi individui allo stadio giovanile di Neogloboquadrina pachyderma durante l’intervallo B ha reso possibile avanzare ipotesi riguardo la strategia di sopravvivenza di questa specie in ambiente estremo quale il ghiaccio antartico. La somiglianza morfologica tra individui giovanili di Neogloboquadrina pachyderma riscontrata durante il nostro studio nei sedimenti a livello fossile nella carota con individui giovanili della stessa specie provenienti da campioni di ghiaccio marino antartico documentati in bibliografia, ha permesso di supportare la tesi dello sviluppo di tali forme nei pori del “microghiaccio”.
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Pettersson, Siri. "Makrofossilanalys som ekologiskt verktyg : En metodutvärdering." Thesis, Uppsala universitet, Institutionen för biologisk grundutbildning, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-321511.

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Approximately 50 percent of all endangered species in Scandinavia are associated with old agricultural landscapes. During the agricultural industrialization of the past century the traditional practices and methods that created these environments have been phased out. This has brought on a serious decline and fragmentation of biomes that many endangered species depend on. Knowledge of traditional agricultural landscapes and their species dynamics is needed to make well informed decisions regarding their care and restoration. One way to acquire such knowledge is to study fossil plant remnants from old agricultural contexts. In this study sub-fossil Cyperaceae achenes were analyzed in an attempt to identify them. The achenes had been preserved in three Iron Age wells (80-980 AD) at the Gilltuna settlement in central Sweden and were found during an archeological investigation in 2010. The purpose of this study was to identify the achenes to species level, make conclusions about the ecology of the surrounding landscape, and construct simple species identification key as well as evaluate archaeobotany as an ecological tool. The identification attempt resulted in 14 determined species, which were in consistency with previous landscape analyses made using ecological species distribution. The resulting identification key is a suggestion, to be expanded in the future. This method can undoubtedly provide further knowledge of prehistoric and historical biomes, but in order to draw useful conclusions the identification technique further as well as knowledge of present regional ecology must be developed, especially concerning different Cyperaceae species‟ response to different kinds of stress.
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Henderson, Andrew Scott. "The palaeo-ecology and biostratigraphy of the foraminifera from the Oxfordian of north Dorset." Thesis, University of Plymouth, 1997. http://hdl.handle.net/10026.1/2002.

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The Oxfordian rocks of north Dorset are poorly exposed at outcrop. A drilling operation was devised and implemented and the complete sequence of strata from the Weymouth Member of the Oxford Clay Formation through to the Ringstead Waxy Clay Formation was penetrated. Three boreholes were drilled; the Hallett's Farm Borehole, covering the strata from the stratigraphically youngest Ringstead Waxy Clay Formation down to the Cucklington Oolite; the Bowden Farm Borehole, continuing the sequence from the Cucklington Oolite into the lower part of the Hazelbury Bryan Formation and the Hartmoor Hill Borehole which continues downward into the Oxford Clay Formation. A continuous succession of the Corallian rocks from north Dorset was obtained. The fresh borehole material was examined for microfossils, with further samples coming from the BGS East Stour Borehole. A diverse assemblage was extracted. The foraminiferal assemblage was examined and includes representatives of 26 families, comprising 26 genera and 148 species. All species were identified and the taxonomy of each studied and described or confirmed. The assemblage is more diverse than previously recorded Corallian assemblages, partly due to the freshness of the borehole material which is not affected by the weathering processes present at surface outcrops. The regional lithostratigraphy defined by the British Geological Survey (Bristow et al, 1995) is confirmed and lithological boundaries not visible at outcrop are described. The distribution and abundance patterns of foraminiferal taxa are analysed and various statistical indices are compared for each borehole. Multivariate methods are employed and in particular non-metric Multidimensional Scaling is used in an attempt to divide the samples into groups which are palaeo-environmentally significant. The authenticity of this method is checked against a Hierarchical Agglomerative Clustering technique. The sample groups are used to define biofacies, fifteen of which are recognised within the studied interval. The correlation of the four boreholes is achieved using lithological techniques, ammonite zonation, foraminiferal biohorizons and the biofacies defined by multivariate analysis. A total of 21 biohorizons are identified with certain horizons coinciding with lithological boundaries and previously defined unconformities recognised within the Oxfordian of Dorset. The long ranging nature of the majority of Upper Jurassic foraminifera precludes the definition of a rigorous biostratigraphic zonation. The important biostratigraphic species for the Upper Jurassic are recorded however, and a tentative zonation, based on the concept of interval zones (Salvador, 1995) is proposed. Eleven zones are recognised.
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Campton, R. Paul. "Agricultural grazing by pale-bellied Brent geese Branta bernicla hrota on Strangford Lough." Thesis, Queen's University Belfast, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287400.

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Wille, Michael. "Vegetation history and climate records of Colombian lowland areas rain forest, savanna and intermontane ecosystems /." [S.l. : Amsterdam : s.n.] ; Universiteit van Amsterdam [Host], 2001. http://dare.uva.nl/document/85624.

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Berrío, Mogollón Juan Carlos. "Lateglacial and Holocene vegetation and climatic change in lowland Colombia." Amsterdam : Amsterdam : Universiteit van Amsterdam ; Universiteit van Amsterdam [Host], 2002. http://dare.uva.nl/document/63800.

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Books on the topic "Paleo ecology"

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Delcourt, Hazel R. Quaternary ecology: A paleoecological perspective. London: Chapman & Hall, 1991.

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Toward a behavioral ecology of lithic technology: Cases from Paleoindian archaeology. Tucson: University of Arizona Press, 2009.

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Rick, Torben C. The archaeology and historical ecology of Late Holocene San Miguel Island. Los Angeles: Cotsen Institute of Archaeology, University of California, 2007.

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Association des archéologues du Québec, ed. Late Pleistocene archaeology and ecology in the far Northeast. College Station: Texas A&M University Press, 2012.

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Bennett, K. D. Evolution and ecology: The pace of life. Cambridge: Cambridge University Press, 1997.

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Andarilhos da claridade: Os primeiros habitantes do cerrado. Goiânia, Go: Universidade Católica de Goiás, Instituto do Trópico Subúmido, 2002.

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Hoffecker, John F. The human ecology of Beringia. New York: Columbia University Press, 2007.

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Simms, Steven R. Behavioral ecology and hunter-gatherer foraging: An example from the Great Basin. Oxford, England: B.A.R., 1987.

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C, Rick Torben, and Vellanoweth René L. 1965-, eds. A canyon through time: Archaeology, history, and ecology of the Tecolote Canyon area, Santa Barbara County, California. Salt Lake City: University of Utah Press, 2008.

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Meggers, Betty Jane. Prehistoric America: An ecological perspective. 3rd ed. New Brunswick [N.J.]: AldineTransaction, 2010.

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Book chapters on the topic "Paleo ecology"

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Price, Gilbert J. "Long-Term Trends in Lineage ‘Health’ of the Australian Koala (Mammalia:Phascolarctidae): Using Paleo-diversity to Prioritize Species for Conservation." In Paleontology in Ecology and Conservation, 171–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-25038-5_9.

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Keller, Catherine. "The gallop of the pale green horse." In Pandemic, Ecology and Theology, 41–53. Abingdon, Oxon ; New York, NY : Routledge, 2021. |: Routledge, 2020. http://dx.doi.org/10.4324/9781003105602-5.

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Ervynck, A., K. Desender, M. Pieters, and J. Bungeneers. "Carabid beetles as palaeo-ecological indicators in archaeology." In Carabid Beetles: Ecology and Evolution, 261–66. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-017-0968-2_40.

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Mischke, S., J. Hofmann, and M. E. Schudack. "Ostracod ecology of alluvial loess deposits in an eastern Tian Shan palaeo-lake (NW China)." In Paleoecology of Quaternary Drylands, 219–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2004. http://dx.doi.org/10.1007/978-3-540-44930-0_12.

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Trask, Michael. "Radical Ecology’s Mindfulness." In Ideal Minds, 67–99. Cornell University Press, 2020. http://dx.doi.org/10.7591/cornell/9781501752438.003.0003.

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This chapter argues that radical ecology offers less a rebuke to neo-idealism than a hyperbolic extension of its crucial conceits. One can begin by noting the large number of its practitioners who believe that ecology's task is to raise not merely human awareness of ecosystems but consciousness as such. In the view of these ecologists, the environment, if not quite sentient, confers a heightened sentience on persons. The chapter also details a dramatic example of the period's tendency to look to the past in the enthusiasm of many ecologists for what can be called the “paleo-republic.” For such thinkers, the future of civilization was not merely the preindustrial but the preagricultural past, an era before malignant overpopulation and bureaucratic inertia steered our species off its evolutionary path.
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Bianchi, Thomas S., and Elizabeth A. Canuel. "Chemical Biomarker Applications to Ecology and Paleoecology." In Chemical Biomarkers in Aquatic Ecosystems. Princeton University Press, 2011. http://dx.doi.org/10.23943/princeton/9780691134147.003.0002.

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This chapter provides a brief historical account of the success and limitations of using chemical biomarkers in aquatic ecosystems. It also introduces the general concepts of chemical biomarkers as they relate to global biogeochemical cycling. The application of chemical biomarkers in modern and/or ancient ecosystems is largely a function of the inherent structure and stability of the molecule, as well as the physicochemical environment of the system wherein it exists. In some cases, redox changes in sediments have allowed for greater preservation of biomarker compounds; in well-defined laminated sediments; for example, a strong case can be made for paleo-reconstruction of past organic matter composition sources. However, many of the labile chemical biomarkers may be lost or transformed within minutes to hours of being released from the cell from processes such as bacterial and/or metazoan grazing, cell lysis, and photochemical breakdown. The role of trophic effects versus large-scale physiochemical gradients in preserving or destroying the integrity of chemical biomarkers varies greatly across different ecosystems. These effects are discussed as they relate to aquatic systems such as lakes, estuaries, and oceans.
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"5. TROPICAL DRY-FOREST MAMMALS OF PALO VERDE: ECOLOGY AND CONSERVATION IN A CHANGING LANDSCAPE." In Biodiversity Conservation in Costa Rica, 48–66. University of California Press, 2019. http://dx.doi.org/10.1525/9780520937772-006.

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Gamble, Clive. "Early Beginnings 500,000–35,000 Years Ago." In The Peopling of Britain. Oxford University Press, 2002. http://dx.doi.org/10.1093/oso/9780198297598.003.0007.

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Abstract:
Our understanding of the first peopling of Britain has recently undergone a transformation. On the one hand there have been fundamental advances in the investigation of Pleistocene environments and chronology, while on the other exceptionally well preserved archaeological sites of the period have now been investigated. These data are allowing us to reinterpret the society and palaeo-ecology of the people who inhabited this small corner of north-west Europe between 500,000 and 35,000 years ago. In order to put these findings into their proper context I will, however, need to roam more widely across the Palaeolithic world and consider the evolutionary changes and geographical processes that were involved over such long time-spans. One aspect I will concentrate upon in this contribution is that, although these earliest inhabitants did not dramatically transform the landscape, in the manner that either prehistoric farmers did with fields and ritual monuments (see Whittle in this volume) or, later, more complex societies achieved through trade, cities and the military machine (see Cunliffe and Härke in this volume), we can, none the less, see the beginnings of such shaping in the way they went about their daily and lifetime routines. My point is that these early hominids (a term which includes ourselves and all our fossil ancestors) were not slaves to nature, ecological creatures determined in everything by the environment, but rather creative builders of social networks that linked their daily landscapes of habit into very different social worlds. Their act of living in the worlds of half a million years ago was every bit as transformative for those environments as our acts of living are today. In other words, the idea that our earliest ancestors lived solely in a natural landscape because they had very simple technologies, smaller brains, and tiny social groupings, while we by contrast create and inhabit a complex cultural world, needs to be revised. Moreover, the second theme of this volume, population diversity and movement, is also illustrated in these early beginnings.
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Conference papers on the topic "Paleo ecology"

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Ashley, Gail M. "PALEO-CRITICAL ZONE ECOLOGY, ARCHIVES OF HOMININ HABITATS AND RESOURCES." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-334248.

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