Skip to main content
U.S. flag

An official website of the United States government

19 results found
Large areas of lowland tropical rain-forests in the neotropics have been burned over the past 6,000 years, mostly by pre-Colombian agriculturists. This paper presents additional evidence of fires and other human impacts in neotropical forests, and considers the opportunities and limitations of…
Author(s): Robert L. Sanford, Sally P. Horn
Keywords: wilderness, paleoecology, neotropical regions, rain forests, charcoal, sediment, fire, human impacts, land use
Source: In: McCool, Stephen F.; Cole, David N.; Borrie, William T.; O’Loughlin, Jennifer, comps. 2000. Wilderness science in a time of change conference—Volume 3: Wilderness as a place for scientific inquiry; 1999 May 23–27; Missoula, MT. Proceedings RMRS-P-15-VOL-3. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. p. 168-173
Year: 2000
Thirty-six papers related to the theme of wilderness as a place to conduct science are included. Five overview papers synthesize knowledge and research about basic work in the biophysical and social sciences that has been conducted in wilderness. Other papers present the results of focused basic…
Author(s): Stephen F. McCool, David N. Cole, William T. Borrie, Jennifer O'Loughlin
Keywords: landscape ecology, paleoecology, populations, therapeutic experiences, visitor experiences, wilderness benefits, wildlife
Source: Proceedings RMRS-P-15-VOL-3. Ogden, UT: U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station. 275 p.
Year: 2000
Two zones of intergradation between populations of Plethodon have been studied for 18 and 20 years, respectively. The data consist of systematic scores of colors, made at least twice annually. Near Heintooga Overlook in the Balsam Mountains (Great Smoky Mountains National Park), the salamanders…
Author(s): Nelson G. Hairston, R. Haven Wiley, Charles K. Smith, Kenneth A. Kneidel
Keywords: Disturbance, hybrid zone, North Carolina, paleoecology, spreading rate
Source: Evolution, 46(4), 1992, pp. 930-938
Year: 1992
This report present information on biogeography and broad-scale ecology (macroecology) of selected fungi, lichens, bryophytes, vascular plants, invertebrates, and vertebrates of the interior Columbia River basin and adjacent areas. Rareplants include many endemics associated with local conditions.…
Author(s): Bruce G. Marcot, L.K. Croft, J.F. Lehmkuhl, R.H. Naney, C.G. Niwa, W.R. Owen, R.E. Sandquist
Keywords: Keywords, Macroecology, paleoecology, ecological integrity, terrestrial communities, ecosystems, wildlife, fungi, lichens, bryophytes, vascular plants, invertebrates, arthropods, mollusks, amphibians, reptiles, birds, mammals, endemism, interior Columbia River basin, Klamath Basin, Great Basin
Source: Gen. Tech. Rep. PNW-GTR-410. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 131 p. (Quigley, Thomas M., tech. ed. Interior Columbia River Basin Ecosystem Management Project: scientific assessment)
Year: 1998
Oak woodlands are a fixture of California geography, yet as recently as 10,000 years ago oaks were only a minor element in the landscape. The first fossil evidence for California's oaks is in the early Miocene (~20 million years ago) when oaks were present across the west, intermixed with deciduous…
Author(s): Scott Mensing
Keywords: California, oak woodlands, paleoecology, Quercus, vegetation history
Source: Gen. Tech. Rep. PSW-GTR-251. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 35-47
Year: 2015
The Paleogene record of Afro-Arabia is represented by few fossil localities, most of which are coastal. Here we report sedimentological and paleontological data from continental Oligocene strata in northwestern Ethiopia. These have produced abundant plant fossils and unique assemblages of…
Author(s): Bonnie F. Jacobs, Neil Tabor, Mulugeta Feseha, Aaron Pan, John Kappelman, Tab Rasmussen, William Sanders, Michael Wiemann, Jeff Crabaugh, Juan Leandro Garcia Massini
Keywords: Ethiopia, paleosols, paleobotany, vertebrate paleontology, Paleogene, Oligocene, plant communities, sedimentation, deposition, paleoecology, paleobiology, fossil pollen, fossil trees
Source: Palaeontologia electronica [electronic resource]. Vol. 8, no. 1 (2005): 19 p.
Year: 2005
Significant climate anomalies have characterized the last 1000 yr in the Sierra Nevada, California, USA. Two warm, dry periods of 150- and 200-yr duration occurred during AD 900-1350, which were followed by anomalously cold climates, known as the Little Ice Age, that lasted from AD 1400 to 1900.…
Author(s): Constance I. Millar, Wallace B. Woolfenden
Keywords: Climate change, forest managenzent, historical variation, use in ecosystem management, natural variability, paleoecology
Source: Ecological Applications 9(4):1207-1216
Year: 1999
The genus Pinus evolved about 100 million years ago, spreading from centres in eastern North America and western Europe throughout middle latitudes of the supercontinent Laurasia. Many early subsections of Pinus are recorded from fossil remains ofthis period, but it is not until the early Tertiary…
Author(s): Constance I. Millar
Keywords: Quaternary, fossil history, paleoecology, biogeography, conservation, Pinus radiata
Source: New Zealand Journal of Forestry Science 29(3):335-365
Year: 1999
Radiocarbon dating and 40 Ar/39Ar analysis of overlying tephra indicate that plant fossil assemblages exposed by stream erosion and well construction in and near La Selva Biological Station in eastern lowland Costa Rica are Pleistocene in age. We identified plant taxa based on wood, leaves, fruits…
Author(s): Sally P. Horn, Robert L. Sanford, David Dilcher, Terry A. Lott, Paul R. Renne, Michael C. Wiemann, Duane Cozadd, Orlando Vargas
Keywords: Costa Rica, fossil plants, La Selva Biological Station, paleoclimate, paleoecology, Pleistocene, pollen, spores, tropical vegetation, tropical wet forest
Source: Biotropica. Vol. 35, no. 3 (2003): Pages 434-441
Year: 2003
Fire-history reconstructions are based on tree-ring records that span the last few centuries and charcoal data from lake-sediment cores that extend back several thousand years. The two approaches have unique strengths and weaknesses in their ability to depict past fire events and fire regimes, and…
Author(s): Cathy Whitlock, Carl N. Skinner, Patrick J. Bartlein, Thomas Minckley, Jerry A. Mohr
Keywords: paleoecology, fire history, fire ecology, pollen, charcoal, tree rings, dendrochronology
Source: Canadian Journal of Forest Research 34(10): 2110-2121
Year: 2004