High-Frequency Dynamics of Ocean pH: A Multi-Ecosystem Comparison

The effect of Ocean Acidification (OA) on marine biota is quasi-predictable at best. While perturbation studies, in the form of incubations under elevated pCO2, reveal sensitivities and responses of individual species, one missing link in the OA story results from a chronic lack of pH data specific to a given species' natural habitat. Here, we present a compilation of continuous, high-resolution time series of upper ocean pH, collected using autonomous sensors, over a variety of ecosystems ranging from polar to tropical, open-ocean to coastal, kelp forest to coral reef. These observations reveal a continuum of month-long pH variability with standard deviations from 0.004 to 0.277 and ranges spanning 0.024 to 1.430 pH units. The nature of the observed variability was also highly site-dependent, with characteristic diel, semi-diurnal, and stochastic patterns of varying amplitudes. These biome-specific pH signatures disclose current levels of exposure to both high and low dissolved CO2, often demonstrating that resident organisms are already experiencing pH regimes that are not predicted until 2100. Our data provide a first step toward crystallizing the biophysical link between environmental history of pH exposure and physiological resilience of marine organisms to fluctuations in seawater CO2. Knowledge of this spatial and temporal variation in seawater chemistry allows us to improve the design of OA experiments: we can test organisms with a priori expectations of their tolerance guardrails, based on their natural range of exposure. Such hypothesis-testing will provide a deeper understanding of the effects of OA. Both intuitively simple to understand and powerfully informative, these and similar comparative time series can help guide management efforts to identify areas of marine habitat that can serve as refugia to acidification as well as areas that are particularly vulnerable to future ocean change

The Role of the Environmental Context in Advance Care Planning among Older Adults

Research has focused on various individual characteristics associated with advance care planning (ACP), but little is known about how the environment context is associated with ACP. This study examined the role of environmental characteristics in ACP by addressing three key aims: 1) examine the independent effects of environmental factors on ACP, 2) assess the moderating effects of environmental factors on the associations between ACP and individual household income and educational attainment, and 3) conduct a longitudinal examination of ACP and environmental characteristics. I combined individual ACP information from the 2004 and 2011 waves of the Wisconsin Longitudinal Study with county level characteristics from publicly available datasets (i.e., Dartmouth Atlas, US Census Bureau, and the Area Health Resource File). Multilevel models showed that several environmental factors were associated with ACP, including county level sociodemographic (e.g., rurality, age composition, prevalence of one-person households) and healthcare-related characteristics (e.g., number of hospice agencies, Medicare reimbursement rates). Environmental factors also revealed moderating effects in the associations between ACP and individual household income and educational attainment. Moreover, results indicated longitudinal effects of environmental characteristics in obtaining ACP status over time. Findings from this study suggest that the environmental context of an individual’s residence can impact their engagement in ACP, even after controlling for their individual characteristics. Evidence from this study may be used to target areas for, and guide the design of, effective intervention strategies to help increase ACP at an environmental level

The Examination of Determinants And Barriers To End-Of-Life Decision Making and Planning

As individuals are living longer, in many cases with chronic diseases, there is an increased focus on end-of-life (EOL) planning and decision making. This includes a broad spectrum of choices including advance care planning (ACP) and turning to palliative care or hospice care. Although there has been an increase in palliative and hospice care enrollment and ACP engagement over the past decade, participation remains low for certain subgroups of the population. The purpose of this symposium is to offer insight into reasons for these varying rates of engagement by exploring determinants and barriers to EOL decision making and planning and by examining caregiver knowledge of EOL decision making and planning from the service provider perspective. The first three studies examine various types of influences in EOL decision making and planning. Inoue and colleagues explore factors associated with the length of hospice stay, and Gaines and colleagues examine the impact of environmental characteristics in ACP. Ornstein and colleagues use Denmark registry data to assess the role of kinlessness at the time of death in EOL decision making and healthcare utilization. The final presentation by Noh and colleagues examines how service providers in rural areas perceive community residents’ knowledge of ACP and palliative care. The discussion following these presentations will compare findings across different forms of EOL decision making and planning, consider the impact of the varying methodological approaches used, and highlight implications of these works for potential interventions and policies related to EOL decision making and planning

The Examination of Determinants And Barriers To End-Of-Life Decision Making and Planning

As individuals are living longer, in many cases with chronic diseases, there is an increased focus on end-of-life (EOL) planning and decision making. This includes a broad spectrum of choices including advance care planning (ACP) and turning to palliative care or hospice care. Although there has been an increase in palliative and hospice care enrollment and ACP engagement over the past decade, participation remains low for certain subgroups of the population. The purpose of this symposium is to offer insight into reasons for these varying rates of engagement by exploring determinants and barriers to EOL decision making and planning and by examining caregiver knowledge of EOL decision making and planning from the service provider perspective. The first three studies examine various types of influences in EOL decision making and planning. Inoue and colleagues explore factors associated with the length of hospice stay, and Gaines and colleagues examine the impact of environmental characteristics in ACP. Ornstein and colleagues use Denmark registry data to assess the role of kinlessness at the time of death in EOL decision making and healthcare utilization. The final presentation by Noh and colleagues examines how service providers in rural areas perceive community residents’ knowledge of ACP and palliative care. The discussion following these presentations will compare findings across different forms of EOL decision making and planning, consider the impact of the varying methodological approaches used, and highlight implications of these works for potential interventions and policies related to EOL decision making and planning

Data from: Mitogenomic phylogenetics of fin whales (Balaenoptera physalus spp.): genetic evidence for revision of subspecies

There are three described subspecies of fin whales (Balaenoptera physalus): B. p. physalus Linnaeus, 1758 in the Northern Hemisphere, B. p. quoyi Fischer, 1829 in the Southern Hemisphere, and a recently described pygmy form, B. p. patachonica Burmeister, 1865. The discrete distribution in the North Pacific and North Atlantic raises the question of whether a single Northern Hemisphere subspecies is valid. We assess phylogenetic patterns using ~16 K base pairs of the complete mitogenome for 154 fin whales from the North Pacific, North Atlantic - including the Mediterranean Sea - and Southern Hemisphere. A Bayesian tree of the resulting 136 haplotypes revealed several well-supported clades representing each ocean basin, with no haplotypes shared among ocean basins. The North Atlantic haplotypes (n = 12) form a sister clade to those from the Southern Hemisphere (n = 42). The estimated time to most recent common ancestor (TMRCA) for this Atlantic/Southern Hemisphere clade and 81 of the 97 samples from the North Pacific was approximately 2 Ma. 14 of the remaining North Pacific samples formed a well-supported clade within the Southern Hemisphere. The TMRCA for this node suggests that at least one female from the Southern Hemisphere immigrated to the North Pacific approximately 0.37 Ma. These results provide strong evidence that North Pacific and North Atlantic fin whales should not be considered the same subspecies, and suggest the need for revision of the global taxonomy of the species. There were a total of 103 CR haplotypes in the Sanger-sequenced data set (Table 1). Haplotypic diversity was high both within ocean basins as well as across all samples. The minimum diversity within an ocean basin was 0.828 for the North Atlantic, which also had the fewest samples. There were no shared haplotypes among ocean basins. There were two fixed differences between the North Atlantic and North Pacific (sites 181 and 198), and one between the North Atlantic and Southern Hemisphere sequences (site 198)