1. Biology in the Anthropocene: Challenges and insights from young fossil records.

    PNAS 112(16):4922 (2015) PMID 25901315 PMCID PMC4413286

    With overwhelming evidence of change in habitats, biologists today must assume that few, if any, study areas are natural and that biological variability is superimposed on trends rather than stationary means. Paleobiological data from the youngest sedimentary record, including death assemblages ...
  2. The effects of temporal resolution on species turnover and on testing metacommunity models.

    American Naturalist 175(5):587 (2010) PMID 20302427

    Patterns of low temporal turnover in species composition found within paleoecological time series contrast with the high turnover predicted by neutral metacommunity models and thus have been used to support nonneutral models. However, these predictions assume temporal resolution on the scale of ...
  3. The effects of temporal resolution on species turnover and on testing metacommunity models.

    American Naturalist 175(5):587 (2010) PMID 20302427

    Patterns of low temporal turnover in species composition found within paleoecological time series contrast with the high turnover predicted by neutral metacommunity models and thus have been used to support nonneutral models. However, these predictions assume temporal resolution on the scale of ...
  4. Discordance between living and death assemblages as evidence for anthropogenic ecological change.

    PNAS 104(45):17701 (2007) PMID 17965231 PMCID PMC2077045

    Mismatches between the composition of a time-averaged death assemblage (dead remains sieved from the upper mixed-zone of the sedimentary column) and the local living community are typically attributed to natural postmortem processes. However, statistical analysis of 73 molluscan data sets from e...
  5. Discordance between living and death assemblages as evidence for anthropogenic ecological change.

    PNAS 104(45):17701 (2007) PMID 17965231 PMCID PMC2077045

    Mismatches between the composition of a time-averaged death assemblage (dead remains sieved from the upper mixed-zone of the sedimentary column) and the local living community are typically attributed to natural postmortem processes. However, statistical analysis of 73 molluscan data sets from e...
  6. Depletion, degradation, and recovery potential of estuaries and coastal seas.

    Science 312(5781):1806 (2006) PMID 16794081

    Estuarine and coastal transformation is as old as civilization yet has dramatically accelerated over the past 150 to 300 years. Reconstructed time lines, causes, and consequences of change in 12 once diverse and productive estuaries and coastal seas worldwide show similar patterns: Human impacts...
  7. Depletion, degradation, and recovery potential of estuaries and coastal seas.

    Science 312(5781):1806 (2006) PMID 16794081

    Estuarine and coastal transformation is as old as civilization yet has dramatically accelerated over the past 150 to 300 years. Reconstructed time lines, causes, and consequences of change in 12 once diverse and productive estuaries and coastal seas worldwide show similar patterns: Human impacts...
  8. Shell composition has no net impact on large-scale evolutionary patterns in mollusks.

    Science 307(5711):914 (2005) PMID 15705849

    A major suspected bias in the fossil record of skeletonized groups is variation in preservability owing to differences in shell composition. However, despite extensive changes in shell composition over the 500-million-year history of marine bivalves, genus duration and shell composition show few...
  9. Shell composition has no net impact on large-scale evolutionary patterns in mollusks.

    Science 307(5711):914 (2005) PMID 15705849

    A major suspected bias in the fossil record of skeletonized groups is variation in preservability owing to differences in shell composition. However, despite extensive changes in shell composition over the 500-million-year history of marine bivalves, genus duration and shell composition show few...
  10. Mesh-size effects on the ecological fidelity of death assemblages: a meta-analysis of molluscan live–dead studies

    Geobios 35:107 (2002)

    Actualistic comparison of death assemblages with local living communities is a standard approach to estimating the quality of paleoecological data, but wide variation in methods of data collection and analysis undermines attempts to draw general conclusions. Here, I apply both standard and ...
  11. Time-averaging in the marine fossilrecord: Overview of strategies and uncertainties

    Geobios 30(7):977 (1997)

    The paleontologic reasoning that led to the recognition of time-averaged assemblages in the early 1970s, and to elaborations of the concept in the 1980s and 1990s, has now undergone considerable actualistic testing, primarily using marine mollusks. These studies have confirmed the fundament...
  12. Scales of climatic variability and time averaging in Pleistocene biotas: implications for ecology and evolution

    Trends in Ecology & Evolution 11(11):458 (1996)

    Biotic responses to Pleistocene climatic fluctuations have traditionally been analyzed in the context of glacial-interglacial cycles on the scale of 10000–100 000 years. However, emerging evidence indicates that short-term, high-amplitude, climatic ‘flickers’, close to the limits of the res...
  13. Taphonomic comparison of passive and active continental margins: Neogene shell beds of the Atlantic coastal plain and Northern Gulf of California

    Palaeogeography, Palaeoclimatology, Palaeoecology 63(1):201 (1988)

    To test for differences in the nature of the fossil record as a function of terrigenous sedimentation, macroinvertebrate concentrations in a recently rifted continental margin (Pliocene Imperial Formation, southeastern California) are compared with a mature passive margin (Miocene Calvert a...
  14. Overview: Ecological and evolutionary implications of taphonomic processes

    Palaeogeography, Palaeoclimatology, Palaeoecology 63(1):1 (1988)

    Taphonomic processes bias the fossil record, but they are also an active force in the structuring and evolution of ecosystems. These processes have important implications for paleobiological problems at many levels, from individual organisms and assemblages to the fossil records of entire b...
  15. Inexpensive field technique for polyester resin peels of structures in unconsolidated sediments

    Marine Geology 64(3):351 (1985)

    McCullen and Allen's (1964) technique for making polyester resin peels of sedimentary structures in wet unconsolidated sediments is made more practical for the field and less expensive by using new lightweight spraying apparatus, disposable cans of propellent, and resins that are readily av...