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    Paleontology

Grants
  • Funding agency logo
    Minute 323 Monitoring Plan for the Colorado River Delta

    Principal Investigator (PI)

    2018

    $1.3M
    Active
  • Funding agency logo
    Limitrophe and Cienega De Santa Clara Monitoring

    Principal Investigator (PI)

    2018

    $128.8K
    Active
  • Funding agency logo
    LSAMP BD: University of Arizona, Western Alliance to Expand Student Opportunities

    Co-Investigator (COI)

    2018

    $1.1M
  • Funding agency logo
    Bridge to Doctorate: WAESO LSAMP, Self Efficacy and Academic Community for Underrepresented Minority Student Success

    Co-Investigator (COI)

    2016

    $1.0M
  • Funding agency logo
    GP-IMPACT - Pathways into Geosciences at the University of Arizona

    Principal Investigator (PI)

    2015

    $288.4K
  • Funding agency logo
    Minute 319 Monitoring Plan for the Colorado River Delta

    Principal Investigator (PI)

    2014

    $893.3K
  • Funding agency logo
    Preliminary Evaluation of Possible Opportunities for Active Management of Cienega de Santa Clara

    Principal Investigator (PI)

    2012

    $19.4K
  • Funding agency logo
    Extended Summary of Cienega de Santa Clara Monitoring Report

    Principal Investigator (PI)

    2012

    $3.6K
  • Funding agency logo
    Discovery & Documentation of New Triassic Microvertebrate Faunas in the Upper Chinle Formation, Petrified Forest National Park, Arizona (Yr2)UAZCP-285

    Principal Investigator (PI)

    2012

    $2.9K
  • Funding agency logo
    Monitoring Project for the Cienega de Santa Clara, Mexico

    Principal Investigator (PI)

    2011

    $102.0K
News
  • Four Questions: UA Experts Discuss Drought Contingency Plan

    2019

  • 3 From UA Recognized by AAAS in New Class of Fellows

    2018

  • Colorado River Delta Report Provides Restoration Road Map

    2018

  • Colorado River Delta Flows Help Birds, Plants, Groundwater

    2016

  • Internships Give a Career Boost to Geosciences Transfer Students

    2016

  • Partnership Connects Transfer Students, Geosciences

    2015

  • Outreach to Parents Could Draw More Hispanics to Geosciences, UA Researchers Say

    2014

  • Colorado River Delta Greener After Engineered Pulse of Water

    2014

  • UA Leading Effort to Evaluate Unprecedented Environmental Flow to Colorado Delta

    2014

  • Conference Spotlights Interdisciplinary Environmental Research

    2013

  • EarthWeek to Feature Student Research

    2012

  • Ciénega de Santa Clara Unchanged After Pilot Run of Desalting Plant

    2012

  • Stephen Jackson Named New Southwest Climate Science Center Director

    2012

  • Putting the Dead to Work for Conservation Biology

    2011

  • Paul S. Martin, Pleistocene Extinctions Expert, Dies

    2010

  • New Book Examines U.S.-Mexico Border Conservation Challenges

    2010

  • UA-Led Team Studies Effect of Yuma Desalting Plant on Cienega de Santa Clara

    2010

  • Two UA Geoscientists Honored at Geological Society Meeting

    2010

  • Spencer Titley Honored for Half-Century of Teaching and Research at UA

    2009

  • UA Awarded $4.35M to Study Earth's Critical Zone

    2009

  • Transformation Produces School of Earth and Environmental Sciences

    2009

  • Snapshot in Time: The Changing College of Science

    2009

  • UA Seeks to Broaden Diversity in Engineering, Geosciences

    2009

  • Peter DeCelles Receives Lifetime Achievement Award from Geological Society of America

    2008

  • Mysterious collector donates $7 million collection to the UA Mineral Museum

    2007

  • Studying Water Quality in Colorado River Delta's Cienega de Santa Clara

    2006

  • Earstones Tell Fishes' Tale in Colorado River Estuary

    2004

  • Hidden Cost of Colorado River Diversions: $2.4 Billion Annually

    2004

  • Year in Review 2001: College of Science

    2001

  • Before the Dams: Environmental History of the Colorado River Delta

    2001

  • Colorado Water Could Help Revive Life on the Delta, UA Geoscientist Says

    2000

Publications (87)
Recent
  • A large-scale environmental flow experiment for riparian restoration in the Colorado River delta

    2017

  • Leveraging environmental flows to reform water management policy: Lessons learned from the 2014 Colorado River delta pulse flow

    2017

  • The experimental flow to the Colorado River Delta: Effects on carbon mobilization in a dry watercourse

    2017

  • Tracking cultural ecosystem services: water chasing the Colorado River restoration pulse flow

    2016

  • Fossil clam shells reveal unintended carbon cycling consequences of Colorado River management

    2016

  • Monthly Water Balance of an Iconic Coastal Desert Wetland Under Reduced Flows and Increased Salinities; Implications for Management

    2015

  • Conservation Paleobiology: Leveraging knowledge of the past to inform conservation and restoration

    2015

  • . Choosing the geoscience major: Important factors, race, ethnicity and gender.

    2015

  • Monthly water balance of an iconic coastal desert wetland under reduced flows and increased salinities: Implications for management

    2015

  • The role of economics in transboundary restoration water management in the Colorado River Delta

    2014

  • Why are there so few hispanic students in geoscience?

    2014

  • Water for nature in the Colorado River delta

    2014

  • From accident to management: The Cienega de Santa Clara ecosystem

    2013

  • Salinity responses to inflow alterations in a 6500ha Typha wetland

    2013

  • Identification of chemicals of potential concern (COPECs) in anthropogenic wetlands of the Colorado River delta

    2013

  • Reprint of: Salinity responses to inflow alterations in a 6500ha Typha wetland

    2013

  • Long-term sustainability of the hydrology and vegetation of Cienega de Santa Clara, an anthropogenic wetland created by disposal of agricultural drain water in the delta of the Colorado River, Mexico

    2013

  • Flooding the Colorado river delta: A landscape-scale experiment

    2013

  • Restoration potential of the aquatic ecosystems of the Colorado River Delta, Mexico: Introduction to special issue on Wetlands of the Colorado River Delta

    2013

  • Post-dam sediment dynamics and processes in the Colorado River estuary: Implications for habitat restoration

    2013

  • Salinity limits of vegetation in the Cienega de Santa Clara, an oligotrophic marsh in the delta of the Colorado River, Mexico: Implications for a salinity increase.

    2012

  • Salinity limits of vegetation in Cienega de Santa Clara, an oligotrophic marsh in the delta of the Colorado River, Mexico: Implications for an increase in salinity

    2012

  • Delta dynamics: Effects of a major earthquake, tides, and river flows on Ciénega de Santa Clara and the Colorado River Delta, Mexico

    2012

  • Restoration flows for the Colorado River estuary, México: Estimates from oxygen isotopes in the bivalve mollusk Mulinia coloradoensis (Mactridae: Bivalvia)

    2012

  • Conservation paleobiology: Putting the dead to work

    2011

  • The delta mudsucker, gillichthys detrusus, a valid species (Teleostei: Gobiidae) endemic to the colorado river delta, Northernmost gulf of California, Mexico

    2011

  • Ecosystem services across borders: A framework for transboundary conservation policy

    2010

  • Fish without water: Validation and application of δ sup 18 /sup O in Totoaba macdonaldi otoliths

    2008

  • Diverting the Colorado River leads to a dramatic life history shift in an endangered marine fish

    2008

  • Just add water and the Colorado river still reaches the sea

    2007

  • Taphonomic variation despite catastrophic mortality: Analysis of a mass stranding of false killer whales (Pseudorca crassidens), gulf of California, Mexico

    2007

  • Trilobite taphonomy and temporal resolution in the Mt. Orab shale bed (Upper Ordovician, Ohio, U.S.A.)

    2006

  • Distribution of the intertidal macrofauna of the Colorado River Delta, northern Gulf of California, Mexico

    2006

  • Reliability of multitaxon, multiproxy reconstructions of environmental conditions from accretionary biogenic skeletons

    2006

  • Forging a common agenda for ecology and paleoecology

    2005

  • The importance of Colorado River flow to nursery habitats of the Gulf corvina (Cynoscion othonopterus)

    2005

  • Who cares about a vanishing clam? Trophic importance of Mulinia coloradoensis inferred from predatory damage

    2005

  • The use of oxygen isotope variation in shells of estuarine mollusks as a quantitative record of seasonal and annual Colorado River discharge

    2004

  • Detecting time-averaging and spatial mixing using oxygen isotope variation: A case study

    2004

  • Bones on the beach: Marine mammal taphonomy of the Colorado delta, Mexico

    2003

  • High-resolution analysis of δ sup 18 /sup O in the biogenic phosphate of modern and fossil lingulid brachiopods

    2003

  • Upstream dams and downstream clams: Growth rates of bivalve mollusks unveil impact of river management on estuarine ecosystems (Colorado River Delta, Mexico)

    2003

  • Sclerochronology and growth of the bivalve mollusks Chione (Chionista) fluctifraga and C. (Chionista) cortezi in the northern Gulf of California, Mexico

    2002

  • Reconstructing daily temperatures from growth rates of the intertidal bivalve mollusk Chione cortezi (northern Gulf of California, Mexico)

    2002

  • Macrofaunal and isotopic estimates of the former extent of the Colorado River estuary, upper Gulf of California, México

    2001

  • Cross-calibration of daily growth increments, stable isotope variation, and temperaturre in the Gulf of California Bivalve Mollusck Chione cortezi: Implications for paleoenvironmental analysis

    2001

  • Effects of upstream diversion of river water on the estuarine bivalve mollusc Mulinia coloradoensis

    2001

  • Ecology and conservation biology of the Colorado River delta, Mexico

    2001

  • Dead delta's former productivity two trillon shells at the mouth of the Colorado River

    2000

  • Seasonal predation by migratory shorebirds recorded in shells of lingulid brachiopods from Baja California, Mexico

    2000

  • Well-traveled cockles: Shell transport during the Holocene transgression of the southern North Sea

    1998

  • High-resolution estimates of temporal mixing within shell beds: the evils and virtues of time-averaging

    1998

  • Radiocarbon reservoir ages in the Gulf of California: Roles of upwelling and flow from the Colorado River

    1997

  • Phenetic discrimination of biometric simpletons: Paleobiological implications of morphospecies in the lingulide brachiopod Glottidia

    1997

  • Gastropod shell repair in the intertidal of Bahia la Choya (N. Gulf of California)

    1997

  • Variation in amino acid epimerization rates and amino acid composition among shell layers in the bivalve Chione from the Gulf of California

    1997

  • Predatory scars in the shells of a recent lingulid brachiopod: Paleontological and ecological implications

    1997

  • Time-averaging and postmortem skeletal survival in benthic fossil assemblages: Quantitative comparisons among Holocene environments

    1997

  • Faunal gradients in surface and subsurface shelly accumulations from a recent clastic tidal flat, Bahia la Choya, northern Gulf of California, Mexico

    1996

  • Improving with age: The fossil record of lingulide brachiopods and the nature of taphonomic megabiases

    1996

  • Ternary taphograms and the comparative taphonomy of recent mollusks from the north sea and the Gulf of California

    1996

  • Bioturbation rates in Bahía la Choya, Sonora, Mexico

    1996

  • Comparative taphonomy and faunal composition of shelly cheniers from northeastern Baja California, Mexico

    1995

  • The quality of the fossil record: Populations, species, and communities

    1995

  • Ternary taphograms: triangular diagrams applied to taphonomic analysis

    1995

  • Biogeography of recent marine bivalve molluscs and its implications for paleobiogeography and the geography of extinction: a progress report

    1995

  • A predatory drillhole in Glottidia palmeri Dall (Brachiopoda; Lingulidae) from Recent tidal flats of northeastern Baja California, Mexico

    1994

  • Taphofacies analysis of recent shelly cheniers (beach ridges), northeastern baja california, Mexico

    1994

  • Shell survival and time-averaging in nearshore and shelf environments: estimates from the radiocarbon literature

    1994

  • Time and taphonomy: quantitative estimates of time-averaging and stratigraphic disorder in a shallow marine habitat

    1993

  • Post-collection taphonomy: Shell destruction and the chevrolet

    1992

  • NSF Funding for paleontology and sedimentary geology

    1990

  • All generalizations about NSF are false. Including this one

    1990

  • The facts of mass extinctions

    1990

  • Taphonomic pathways and comparative biofacies and taphofacies in a Recent intertidal/shallow shelf environment

    1990

  • Fossils out of sequence: computer simulations and strategies for dealing with stratigraphic disorder

    1990

  • Taphonomy of tidal flat moluscs in the Northern Gulf of California: Paleoenvironmental analysis despite the perils of preservation.

    1987

  • Declining Phanerozoic background extinction rates: Effect of taxonomic structure?

    1985

  • Biogeography and paleobiology.

    1985

  • Comment on 'Late Oligocene transgression of middle Atlantic Coastal Plain'

    1981

  • Planktonic foraminiferal diversity in the interglacial and glacial North Atlantic: a test of diversity gradients as a paleoceanographic technique.

    1980

  • Comment on 'Geologic implications of the relationship between mammalian faunal similarity and geographic distance'

    1979

  • Geologic implications of the relationship between mammalian faunal similarity and geographic distance

    1979

  • Patterns of planktonic foraminiferal abundance and diversity in surface sediments of the western North Atlantic

    1978

  • Sedimentation rates in a coastal marsh determined from historical records

    1977

  • Large scale extinctions

    1976

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