Volume 12.Article 1. The zooplankton of Tisbury Great Pond.

https://elischolar.library.yale.edu/bulletin_yale_bingham_oceanographic_collection/1144/thumbnail.jp

Pelagic ostracods of the Sargasso Sea off Bermuda: Description of species, seasonal and vertical distribution

Forty-three species of pelagic ostracods, Including one Cypridinid and 42 Halocyprids, were identified and are described and figured from samples collected…https://elischolar.library.yale.edu/peabody_museum_natural_history_bulletin/1025/thumbnail.jp

Volume 17. Article 2. Plankton studies.

https://elischolar.library.yale.edu/bulletin_yale_bingham_oceanographic_collection/1158/thumbnail.jp

Population structure of graptolite assemblages

Graptolite rhabdosomes display a diverse suite of morphologies. The range of morphotypes present within most moderate to high diversity assemblages from the Ordovician and Silurian is similar, despite the different taxonomic composition of the faunas at different times. Survivorship analyses of graptolite faunas from the Ordovician and Silurian demonstrate strong similarities in the mortality rates of unrelated graptolites of similar functional morphology. It also shows a strong correlation of decreasing mortality rates amongst more mature colonies with increasing rhabdosome complexity. This similarity in both functional morphology and life history of graptolites suggests that they lived within a very stable planktic community structure

Universal Mortality Law, Life Expectancy and Immortality

Well protected human and laboratory animal populations with abundant resources are evolutionary unprecedented, and their survival far beyond reproductive age may be a byproduct rather than tool of evolution. Physical approach, which takes advantage of their extensively quantified mortality, establishes that its dominant fraction yields the exact law, and suggests its unusual mechanism. The law is universal for all animals, from yeast to humans, despite their drastically different biology and evolution. It predicts that the universal mortality has short memory of the life history, at any age may be reset to its value at a significantly younger age, and mean life expectancy extended (by biologically unprecedented small changes) from its current maximal value to immortality. Mortality change is rapid and stepwise. Demographic data and recent experiments verify these predictions for humans, rats, flies, nematodes and yeast. In particular, mean life expectancy increased 6-fold (to "human" 430 years), with no apparent loss in health and vitality, in nematodes with a small number of perturbed genes and tissues. Universality allows one to study unusual mortality mechanism and the ways to immortality

Late Quaternary palaeoenvironment of northern Guatemala: evidence from deep drill cores and seismic stratigraphy of Lake Petén Itzá

Long sediment cores were collected in spring 2006 from Lake Petén Itzá, northern Guatemala, in water depths ranging from 30 to 150 m, as part of an International Continental Scientific Drilling Program project. The sediment records from deep water consist mainly of alternating clay, gypsum and carbonate units and, in at least two drill sites, extend back >200 kyr. Most of the lithostratigraphic units are traceable throughout the basin along seismic reflections that serve as seismic stratigraphic boundaries and suggest that the lithostratigraphy can be used to infer regional palaeoenvironmental changes. A revised seismic stratigraphy was established on the basis of integrated lithological and seismic reflection data from the basin. From ca 200 to ca 85 ka, sediments are dominated by carbonate-clay silt, often interbedded with sandy turbidites, indicating a sediment regime dominated by detrital sedimentation in a relatively humid climate. At ca 85 ka, an exposure horizon consisting of gravels, coarse sand and terrestrial gastropods marks a lake lowstand or partial basin desiccation, indicating dry climate conditions. From ca 85 to ca 48 ka, transgressive carbonate-clay sediments, overlain by deep-water clays, suggest a lake level rise and subsequent stabilization at high stage. From ca 48 ka to present, the lithology is characterized by alternating clay and gypsum units. Gypsum deposition correlates with Heinrich Events (i.e. dry climate), whereas clay units coincide with more humid interstadials

Pollen accumulation rates at Rogers Lake, Connecticut, during late- and postglacial time

Pollen accumulation rates have been estimated by dividing the pollen number per unit volume in 1 ml samples from a core from Rogers Lake, Connecticut, by the number of years represented by each sample. The latter variable was estimated from 24 radiocarbon-dated levels within the core. The result shows that total pollen deposition rose steepy from 1,000 /cm2 / year, 14,000 years ago to 10,000/cm2/year in later Late Glacial time, reaching a maximum of 40,000/cm2/year, 9,000 years ago when the Pine Pollen Zone (B) was deposited. Subsequently the deposition rate fall to 20,000-25,000/cm2/year, remaining stable at this level for the last 8,000 years.The pollen-percentage stratigraphy at Rogers Lake is similar to that at other sites in the vicinity. The changes in pollen percentages in sediments less than 8,000 years old directly reflect changes in deposition rates for these types, since the pollen total was almost constant. A rise in the numbers of Carya pollen grains took place about 5,000 years ago, and minimum rates for Tsuga-pollen deposition occurred between 1,500 and 4,000 years ago. These changes have been considered evidence for a xerothermic interval, but this event may be represented instead by the maximum in percentages and increase in deposition rates for Ambrosia pollen that occurred between 5,000 and 8,000 years ago.In sediments older than 8,000 years, the changes in pollen percentages are quite different from the changes in rates of pollen deposition of individual types. The pollen-accumulation-rate diagram shows that few pollen grains from trees were being deposited 12,000 years ago. Spruce pollen increased at that time, reaching a maximum 10,000 years ago, when an open spruce woodland may have grown in the region. Pine pollen began to increase 12,000 years ago, reaching maximum rates 9,000 years ago 18 times higher than the later Post-glacial rate. Oak pollen increased in numbers 12,000 years ago and held steady throughout the remainder of Late Glacial time, increasing rapidly by a factor of 30 during Early Postglacial time.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/33322/1/0000718.pd

Bulletin No. 17: Preserving Our Freshwater Wetlands

Reprints of a series of articles on why this is important and how it can be done. 52 pp. 1970

Volume 13. Article 3. Hydrographic and biological studies of Block Island Sound.

https://elischolar.library.yale.edu/bulletin_yale_bingham_oceanographic_collection/1150/thumbnail.jp