Analysis of DDT isomers and breakdown products, DDD and DDE, in over 3500 bivalve samples collected from more than 300 locations along the continental United States indicates that concentrations are decreasing. Overall average concentrations for the East (45.8±24.6 ng/gdw), Gulf (42.4±21.1 ng/gdw), and West (90.9±43.3ng/gdw) coasts are declining with an environmental half-life between 10 and 14 ears and are predicted to decrease below 10% of today's concentrations by 2050. Geographically, areas with high and low levels are well identified. Bivalves yielding the highest concentrations were collected in areas linked to areas of DDT production or heavy usage. These areas are clustered in the southern California and San Francisco area, on the West coast; Delaware and Hudson/Raritan Estuary, on the East coast; and in Alabama and northwestern Florida, on the Gulf of Mexico. Statistically significant decreasing trends in ΣDDT concentrations are apparent at most of these locations.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.marpolbul.2013.12.049 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Characterisation of spp. from Parsnip and Other Hosts.
J Fungi (Basel)
December 2024
Warwick Crop Centre, School of Life Sciences, Wellesbourne Campus, University of Warwick, Warwick CV35 9EF, UK.
Parsnips () are a speciality UK crop with an economic value of at least 31M GBP annually. Currently, the major constraints to production are losses associated with root canker disease due to a range of fungal pathogens, among which is of most concern to growers. With limited research conducted on this species, this work aimed to provide a much-needed characterisation of isolates from across the UK, continental Europe, and New Zealand.
View Article and Find Full Text PDFComparative bioacoustics of multiple eastern versus western songbird pairs in North America reveals a gradient of song divergence.
PLoS One
December 2024
Department of Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America.
Vocalizations are one of the key premating reproductive barriers that could affect species formation. In song-learning birds, vocal traits are sometimes overlooked in species delimitation, as compared to morphological or plumage-based differences. In this study, we assessed geographic variation in songs of eight pairs of oscines on two scales: (1) comparing primary songs of species/subspecies pairs whose breeding grounds are eastern and western counterparts of each other in the continental North America, and (2) for each counterpart, identifying and comparing possible variation among their populations.
View Article and Find Full Text PDFMacroalgae of the Campeche Bank, Gulf of Mexico.
Biodivers Data J
December 2024
Universidad Nacional Autonoma de Mexico, Mexico, Mexico Universidad Nacional Autonoma de Mexico Mexico Mexico.
Background: The coastal habitats in the southern Gulf of Mexico face multiple threats, such as rising water temperatures, acidification, increased turbidity, invasive species and pollutants. This imperils the biodiversity of beaches, wetlands and coral reefs. To address this, there is a need for comprehensive baseline information on marine biodiversity.
View Article and Find Full Text PDFTime-calibrated phylogeny of neotropical freshwater fishes.
Front Bioinform
December 2024
Department of Biology, University of Louisiana at Lafayette, Lafayette, LA, United States.
Neotropical Freshwater Fish (NFF) fauna exhibits the greatest phenotypic disparity and species richness among all continental aquatic vertebrate faunas, with more than 6,345 species distributed across the mostly tropical regions of Central and South America. The last two decades have seen a proliferation of molecular phylogenies, often at the species level, covering almost all 875 valid NFF genera. This study presents the most comprehensive genome-wide, time-calibrated phylogenetic hypothesis of NFF species to date, based on DNA sequences generated over decades through the collaborative efforts of the multinational ichthyological research community.
View Article and Find Full Text PDFMulti-locus investigation of Anopheles-mediated selective pressure on Plasmodium falciparum in Africa.
Parasit Vectors
December 2024
Department of Biology, College of Arts and Sciences, Baylor University, Waco, TX, USA.
Background: The high burden of malaria in Africa is largely due to the presence of competent and adapted Anopheles vector species. With invasive Anopheles stephensi implicated in malaria outbreaks in Africa, understanding the genomic basis of vector-parasite compatibility is essential for assessing the risk of future outbreaks due to this mosquito. Vector compatibility with P.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!