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Abrupt tropical climate change: past and present.
- L. Thompson, E. Mosley‐Thompson, K. Mountain
- Environmental Science, GeographyProceedings of the National Academy of Sciences…
- 11 July 2006
It is argued that the present warming and associated glacier retreat are unprecedented in some areas for at least 5,200 yr, which is not only contributing to global sea-level rise but also threatening freshwater supplies in many the world's most populous regions.
Phylogenetic Studies in Alismatidae, II: Evolution of Marine Angiosperms (Seagrasses) and Hydrophily
The evolution of hydrophily, unisexuality, and marine habit in angiosperms was explored using estimates of phylogeny obtained by phylogenetic analyses of chloroplast (rbcL) gene sequence data.
An ordinal classification for the families of flowering plants
Recent cladistic analyses are revealing the phylogeny of flowering plants in increasing detail, and there is support for the monophyly of many major groups above the family level. With many elements…
Evidence of hybridity in invasive watermilfoil (Myriophyllum) populations
- M. Moody, D. Les
- Environmental Science, BiologyProceedings of the National Academy of Sciences…
- 29 October 2002
Molecular data demonstrate clearly that invasive watermilfoil populations in North America have resulted from hybridization between nonindigenous and native species, and suggest that invasiveness in these aggressive aquatic weeds may be linked to heterosis maintained by vegetative propagation.
Aquatic and wetland plants of India
- D. Les
- Environmental Science
- 1 November 1997
Phylogeny, Classification and Floral Evolution of Water Lilies (Nymphaeaceae; Nymphaeales): A Synthesis of Non-molecular, rbcL, matK, and 18S rDNA Data
A well-corroborated phylogeny of water lily genera is presented that is based on agreement between non-molecular data and DNA sequences obtained from both organellar and nuclear genomes and is used to encourage the adoption of an evolutionarily based classifi- cation system for water lilies.
Phylogeny and Systematics of Lemnaceae, the Duckweed Family
Combined data analysis confirms the monophyly of Landoltia, Lemna, Spirodela, Wolffia, and Wolffiella and establishes a single, well-resolved, maximum parsimony tree with 30/36 nodes supported by bootstrap values that exceed 90%.
The Central Role of Dispersal in the Maintenance and Persistence of Seagrass Populations
The role that sexual reproduction, pollen, and seed dispersal play in maintaining species distributions, genetic diversity, and connectivity among seagrass populations is explored and the relationship between long-distance dispersal, genetic connectivity, and the maintenance of genetic diversity is addressed.
Biogeography of Discontinuously Distributed Hydrophytes: A Molecular Appraisal of Intercontinental Disjunctions
- D. Les, D. Crawford, R. Kimball, M. Moody, E. Landolt
- Environmental ScienceInternational Journal of Plant Sciences
- 1 November 2003
This study assesses the dispersal/displacement hypotheses from a temporal standpoint using molecular estimates of divergence time for a diverse sample of phylogenetically related aquatic taxa that exhibit discontinuous intercontinental distributions and found divergence times that are far too recent to implicate continental drift as a major determinant of discontinuous distributions in aquatic plants.
Introduction of Nonindigenous Aquatic Vascular Plants in Southern New England: A Historical Perspective
Criteria is presented to facilitate decisions whether a species should be characterized as nonindigenous or invasive, and the extent of invasiveness of the following aquatic plants in southern New England.