• Publications
  • Influence
Carbon-Isotope, Diatom, and Pollen Evidence for Late Holocene Salinity Change in a Brackish Marsh in the San Francisco Estuary
Abstract Analysis of diatoms, pollen, and the carbon-isotopic composition of a sediment core from a brackish marsh in the northern part of the San Francisco Estuary has provided a paleosalinityExpand
Holocene vegetation change in the northern Peten and its implications for Maya Prehistory
Abstract An ∼8400 cal yr record of vegetation change from the northern Peten, Guatemala, provides new insights into the environmental history of the archaeological area known as the Mirador Basin.Expand
Abundance and diversity of tidal marsh plants along the salinity gradient of the San Francisco Estuary: implications for global change ecology
From 2003 through 2005, tidal marsh plant species diversity and abundance on historically surveyed vegetation transects along the salinity gradient of the San Francisco Estuary were investigated toExpand
Pollen evidence for historic sedimentation rates in California coastal marshes
The pollen of alien weeds and ornamentals is used to determine sedimentation rates in four California coastal salt marshes. The results indicate that during the present century sedimentation ratesExpand
A 5000-year record of agriculture and tropical forest clearance in the Tuxtlas, Veracruz, Mexico
We present pollen and microscopic charcoal evidence from securely dated lake sediments, located in the Tuxtlas region of Veracruz, Mexico. Two periods of agricultural activity are recognized. TheExpand
A 560-Year Record of Santa Ana Fires Reconstructed from Charcoal Deposited in the Santa Barbara Basin, California
Microscopic charcoal from varved Santa Barbara Basin sediments was used to reconstruct a 560-yr record (A.D. 1425 to 1985) of Santa Ana fires. Comparison of large (>3750 μm2) charcoal with documentedExpand
Pre-mission invasion of Erodium cicutarium in California
The California grassland is dominated by alien plant species. It is generally assumed that the invasion of aliens began with the initial introduction of livestock by Spanish missionaries in 1769. InExpand
An 8700 year paleoclimate reconstruction from the southern Maya lowlands
Abstract Analysis of a sediment core from Lago Puerto Arturo, a closed basin lake in northern Peten, Guatemala, has provided an ∼8700 cal year record of climate change and human activity in theExpand
Behavioral and Physiological Responses to Emersion in Freshwater Bivalves
Some emersion adaptations of freshwater species appear to be modifications of those displayed by intertidal and estuarine bivalves, while others appear independently evolved to allow survival of the extreme emersion periods associated with life in shallow freshwaters. Expand
Acid-Base Balance during Emergence in the Freshwater Bivalve Corbicula fluminea
The inability of C. fluminea to maintain or restore acid-base balance during short emersion periods may account for this species' low tolerance of aerial exposure and is further evidence of its recent invasion of freshwater habitats. Expand