Year, Title, Grantee(s), Sponsor (s)	Amount
2011 Middle-Atlantic Lampropeltis triangulum of the Potomac Gorge and surrounds; species occurrence and taxonomic status Ted R. Kahn, Neotropical Conservation Foundation, Washington, D.C. Sponsor: Walt Bulmer	$1,500
Testing predator-mediated coexistence of the mosquito A. japonica with the competitively superior congener A. albopictus: global change in the Potomac Basin Paul Leisnham and Zachary Freek, University of Maryland, College Park Sponsor: Lowell Adams	$2,000
Cascading effects of host plant nutritional quality on herbivores and their parasitoids Teresa Stoepler, George Washington University Sponsor: John T. Lill	$2,200
Tundra and Trumpeter Swan genetic population study Lauren Wilson, George Mason University, Fairfax, VA Sponsor: James Lawrey	$2,000
Dyke Marsh Wildlife Preserve Arthropod Study (DMWPAS) Edward M. Barrows (Member) Georgetown University	$1,550
Polyploidy and genetic structure in American elm Alan Whittemore (Member) U.S. National Arboretum	$2,750
Transferring the "Carabid beetles of Plummers Island" database to EOL and updating the species list Terry Erwin (Member) National Museum of Natural History	$3,000
2009 Impact of pollinators on the reproductive success and floral display of Asclepias (milkweed) in the Potomac Valley Aaron F. Howard, Georgetown University, and Edward M. Barrows (Member)	$2,300
Biodiversity inventory of earthworms (Oligochaeta: Annelida) of Plummers Island, Maryland Jerry L. Burgess and Katalin Szlavecz, Johns Hopkins University Sponsor: Arnold Norden	$1,800
The role of growth and flowering phenology in competitive interations between native and invasive herbaceous species Kevin Barry, University of Maryland, College Park Sponsor: Stan Shetler	$2,000
Surveys to determine the southern extent of the invasive rusty crayfish, Orconectes rusticus, in the Monacacy River Susan Carney and Eric Annis, Hood College Sponsor: Arnold Norden	$2,000
Biology of two newly discovered parasitic wasps in the Parker's Creek Watershed Michael W. Gates, Systematic Entomology Laboratory, U.S. Department of Agriculture Sponsor: John Brown	$1,500
Variation in song at the regional level in orchard orioles (Icterus spurius): a model group for studying recent character divergence Kevin Omland, University of Maryland, Baltimore County Sponsor: Mercedes Foster	$1,700
Interactions between habitat complexity and temporal variability in predator size structure and prey availability: implications for coexistence in intraguild predation systems Jonathan Witt, George Mason University Sponsor: James Lawrey	$2,000
Nitrogen dynamics in created and natural reference wetlands of the Potomac Watershed Kristin L. Wolf, Gregory B. Noe, Changwoo Ahn, George Mason University and U.S. Geological Survey Sponsor: James Lawrey	$1,700
2008 Study of the life history of Ethmia macelhosiella Busck, 1907 (Elachistidae: Ethmiinae) on Plummers Island Andras Kun and John Brown (Member)	$2,300
Excluding mammalian predators from diamondback terrapin nesting beaches with an electric fence Lowell Adams (Member)	$2,500
Impact on insect pollinators on outcrossing pollination rates of Asclepias syriaca (common milkweed) in the Potomac Valley Aaron F. Howard, Georgetown University, and Edward M. Barrows (Member)	$2,285
Putting stream salamanders in context: linking stream salamander behavior, bioturbation, and the loss of small streams Evan H. Campbell Grant and David C. Richardson, Marine, Estuarine and Environmental Sciences, University of Maryland, College Park Sponsor: Matthew C. Perry	$2,450
Bioaccumulation of heavy metals in red-bellied turtles (Trachemys scripta elegans) in the Potomac River Rachel Harley, George Mason University Sponsor: Roy W. McDiarmid	$2,500
Comparing alternative models of the genetic impacts of population bottlenecks using Chesapeake Bay striped bass (Morone saxatilis) as an example organism Matthew B. Hamilton, Georgetown University Sponsor: Roy W. McDiarmid	$2,500
2007 Distribution and phenology of the Maryland endangered plant Phacelia covillei (Hydrophyllaceae) in Plummers Island and adjacent areas, Chesapeake and Ohio Canal National Historical Park, Maryland Aaron F. Howard, Georgetown University, and Edward M. Barrows (Member)	$1,500
Nematodes of Plummers Island, subclass Enoplia Ashleigh B. Smythe, Smithsonain Institution	$2,300
DNA barcoding land snails of the family Polygyridae on Plummers Island Gina M. Meletakos, Townson University	$1,100
Macrolepidoptera feeding on Acer negundoL. Eric Lind, University of Maryland, College Park	$800
A search for diatom and chrysophyte symbionts in lichens David Schwartzman, Howard University	$2,500
Hatching success of diamondback terrapins (Malaclemys terrapin) in relation to mammalian exclosure from nesting beaches Willem Roosenburg, Ohio University and Lowell Adams (Member)	$2,400
Genetic analysis of hybridization in a globally rare freshwater mussel - the Yellow Lampmussel (Lampsilis cariosa) in the Potomac River drainage Judith Rhymer, University of Maine and James M. McCann, Maryland Department of Natural Resources Natural Heritage Program	$2,300
Evaluation of Escherichia coli in the Potomac River Basin (including Plummers Island) Earl Benjamin III, Morgan State University	$2,300
Morphological and molecular characterization of Amelanchier ashei Frye & Roberts sp.nov.: a putative endemic to the Potomac Gorge of the District of Columbia, Maryland, and Virginia C. T. Frye and R. P. Roberts, Maryland Department of Natural Resources	$2,300
2006 Survey of the ants (Hymenoptera: Formicidae) of Plummers Island Mark Deyrup, Archbold Biological Station, Arnold W. Norden (Member), and Beth M. Norden (Member)	$2,240
Host plant associations of Tortricidae on Plummers Island John T. Lill, George Washington University, and John W. Brown (Member)	$1,310
Bioinventory of the springtails (Hexapoda: Collembola) of Plummers Island, Maryland Joseph Reznik, University of Vermont Sponsor: John W. Brown	$2,400
Analysis of the large 1998-1999 malaise arthropod sample of Dyke Marsh Preserve, Virginia: Asilidae, Bombyliidae, Conopidae, Stratiomyidae, and Tabanidae (Diptera) Edward M. Barrows, Georgetown University Sponsor: Donald R. Davis	$2,000
Testing for genetic impacts of a severe population bottleneck in striped bass (Morone saxatilis) in the Chesapeake watershed Matthew B. Hamilton, American University Sponsor: Roy W. McDiarmid	$2,350
The ecology of free-roaming canids in Rock Creek Park, Washington, D.C. Megan Draheim and Larry L. Rockwood, George Mason University Sponsor: John M. Hadidian	$2,350
Genetic variation and mortality of central Maryland eastern box turtles (Terrapene c. carolina) Susan Hagood, University of Maryland, College Park Sponsor: Lowell W. Adams	$2,350
2005 Potomac Gorge bioblitz (food for volunteers) Arthur V. Evans and Stephanie Flack, The Nature Conservancy Sponsor: M. Alma Solis	$1,000
Predator-prey interactions between mud-dauber wasps (Hymenoptera, Sphecidae) and spiders (Aranae) Divya Bellur Uma, Georgetown University Sponsor: John W. Brown	$2,270
Possible double-brooding in temperate-breeding orioles: breeding behavior of Baltimore orioles in Maryland Spring D. Ligi, University of Maryland, Baltimore County Sponsor: Mercedes S. Foster	$865
Host plant and parasitoid associations of slug caterpillars on Plummers Island John T. Lill, George Washington University Sponsor: Patrick S. Herendeen	$2,200
From its source to the sea: the selective pressures on swamp sparrows along Potomac headwaters and mid-Atlantic coast Brian Olsen and Russell Greenberg, Virginia Polytechnic Institute and State University Sponsor: Daryl J. Boness	$2,470
A study of the genetic structure of terrestrial snail populations on Plummers Island Colleen S. Sinclair, Towson University Sponsor: Arnold W. Norden	$2,500
Effect of urbanization on the adult stage of aquatic insects: does constrained dispersal contribute to community degradation? Robert F. Smith, University of Maryland, College Park Sponsor: Lowell W. Adams	$2,485
2004 New taxonomic tools for the 21st century W. John E. Kress (Member)	$3,000
Inventory of freshwater mollusks of Plummers Island, Maryland, USA Timothy Pearce, Carnegie Museum of Natural History Sponsor: Arnold W. Norden	$2,000
Alien plants and the diversity of phytophagus insects on Plummers Island Doug W. Tallamy, University of Delaware Sponsor: John W. Brown	$2,000
Diversity and biological studies of arthropods of the Washington, D.C. area Edward M. Barrows and Daniel S. Kjar, Georgetown University Sponsor: Donald R. Davis	$2,000
Partitioning pollinator contributions to fitness components in a Potomac Basin population of Silene caroliniana (Caryophyllaceae) Richard Reynolds, University of Maryland, College Park Sponsor: Michael G. Pogue	$2,000
Reproductive morphology and phylogeny of stalk-eyed flies in the Potomac Basin Philip M. Johns, University of Maryland, College Park Sponsor: John W. Brown	$2,000
Construction of deer exclosures at Maryland Heights Harper’s Ferry National Historical Park Scott Bates, National Park Service Sponsor: L. Kay Thomas, Jr.	$2,000
Molecular genetic characterization of relatedness among Potomac River drainage populations of the wood turtle (Glyptemys insculpta): Part I: data collection Thomas S. B. Akre, University of Georgia Sponsor: Roy W. McDiarmid	$2,500
2003 Bio assessment of the woody vegetative communities present on Plummers Island Alicia M. Wells, Patuxent Wildlife Research Center Sponsor: Matthew C. Perry	$2,500
Inventory continuation of the Lepidoptera of Plummers Island John W. Brown (Member)	$3,100
Survey of the occurrence and distribution of cellular slime molds of Plummers Island John C. Landolt, Shepherd College Sponsor: David F. Farr	$910
Diversity and biological studies of arthropods of the Washington, D.C. area Edward M. Barrows and Daniel S. Kjar, Georgetown University Sponsor: Donald R. Davis	$2,500
The role of learning in foraging by Polistes fuscatus wasps Martha R. Weiss, Georgetown University Sponsor: Donald R. Davis	$1,000
Soil moisture as a source of variation in home range size of Terrapene carolina Will Brown, Shenandoah National Park Sponsor: Roy W. McDiarmid	$2,485
Floristic survey of the eastern Goose Creek Watershed, Loudoun County, Virginia Lisa B. Williams, George Mason University Sponsor: James D. Lawrey	$2,500
2002 Inventory of the harvestmen (Opiliones) and millipedes (Diplopoda) of Plummers Island Jeff Shultz, Heather Wilson, and Ethane Kane, University of Maryland, College Park Sponsor: Arnold W. Norden	$2,400
Diversity and biological studies of hexapods (insects and close kin) of Dyke Marsh Wildlife Preserve, Virginia Edward M. Barrows and Daniel S. Kjar, Georgetown University Sponsor: Donald R. Davis	$2,500
Pyralidae (Pyraloidea) of Plummers Island, including a molecular phylogenetic analysis M. Alma Solis (Member) and S. Scheffer, Systematic Entomology Laboratory	$2,377
Composition, population dynamics, and ecology of the anuran community at Occoquan Bay National Wildlife Refuge, Woodbridge, Virginia Ellen K. Carson, George Mason University Sponsor: Don E. Wilson	$2,500
2001 The use of forward looking infra-red (FLIR) imagery to locate bird carcasses resulting from the agricultural use of pesticides Lowell W. Adams (Member) and Juliet Healy, University of Maryland, College Park	$2,500
Inventory of Microlepidoptera (Insecta: Lepidoptera) of Plummers Island, Maryland John W. Brown (Member)	$1,820
Rhagionidae of Plummers Island Peter J. Hibbs, University of Maryland, College Park Sponsor: Donald R. Davis	$1,149
Estimating breeding population structure of striped bass (Morone saxatilis) in the Chesapeake watershed Matthew B. Hamilton, Georgetown University Sponsor: Roy W. McDiarmid	$1,900
Learning ability in the pipevine swallowtail butterfly: comparison with honeybees Martha R. Weiss, Georgetown University Sponsor: John W. Brown	$1,900
Diversity and biological studies of hexapods (insects and close kin) of Dyke Marsh Wildlife Preserve, Virginia Edward M. Barrows and Daniel.S. Kjar, Georgetown University Sponsor: Donald R. Davis	$1,900
Influence of beaver impoundments on water chemistry and fish and macroinvertebrate assemblages in Maryland streams Patricia J. Allen, Rebecca Peet, and Richard L. Raesly, Frostburg University Sponsor: Alfred L. Gardner	$1,900
2000 Diversity and biological studies of hexapods (insects and close kin) of Dyke Marsh Wildlife Preserve, Virginia Edward M. Barrows, Georgetown University Sponsor: Donald R. Davis	$2,500
The effects of grassland management on the selection of foraging habitat by birds of prey Kerry J. Fitzpatrick, University of Maryland, College Park Sponsor: Lowell W. Adams	$1,100
Populations monitoring of the North American river otter (Lontra canadensis) using a noninvasive molecular method Michael D. Brandhagen, George Mason University Sponsor: James D. Lawrey	$2,500
Floristics of Carex (Cyperaceae) in the Potomac River Gorge Chris Lea, National Park Service, and Chris Frye, Maryland Department of Natural Resources Sponsor: James D. Lawrey	$1,100
1999 Diversity of hexapods (insects and close kin) of Dyke Marsh Wildlife Preserve, Virginia Edward M. Barrows, Georgetown University Sponsors: David W. Johnston and Donald R. Davis	$2,500
Suppression of Ixodes scapularis and Borrelia burdgorferi by self-application of permethrin by white-tailed deer Victoria Solberg, University of Maryland, College Park Sponsor: Lowell W. Adams	$2,500
Inventory of the Noctuidae of Plummers Island Michael Pogue, Systemic Entomology Laboratory, U.S. Department of Agriculture Sponsor: Donald R. Davis	$1,170
A survey for Lucanus elephus Fabricius (Coleoptera: Lucanidae) in Maryland Charles L. Staines and S. L. Staines, National Museum of Natural History Sponsor: Paul J. Spangler	$2,500
Population abundance and habitat requirements of the marsh wren (Cistothorus palustris) at Dyke Marsh National Wildlife Preserve, Virginia Sandy C. Spencer, George Mason University Sponsors: James D. Lawrey and David W. Johnston	$1,917
Natural history of Plummers Island, Maryland: 100 years of data on the ground beetles of a temperate forest site (Coleoptera: Carabidae) Terry L. Erwin (Member) and Raul Medina, University of Maryland, College Park	$2,500
Examining the impact of a non-native bivalve (Corbicula fluminea) on resource availability to native unionid mussles in the Potomac River drainage basin Christine Hakenkamp, James Madison University Sponsor: Larry R. Jahn	$1,000
Species turnover in the Tortricid moths (Insecta: Lepidoptera: Tortricidae) of Plummers Island, Maryland John Brown Systematic Entomology Laboratory, U.S. Department of Agriculture Sponsor: Donald R. Davis	$2,000
1998 The Microlepidoptera (Insecta: Lepidoptera) of Maryland, with an emphasis on Plummers Island John Brown, Systematic Entomology Laboratory, U.S. Department of Agriculture Sponsor: M. Alma Solis	$2,000
Linking species and ecosystem processes: are native and introduced bivalve species redundant? Christine Hakenkamp, University of Maryland, College Park Sponsor: Larry R. Jahn	$2,000
The effect of soil organic matter on phosphorus retention and transformation in constructed and natural freshwater wetlands Dianna Hogan, George Mason University Sonsor: James D. Lawrey	$2,500
Inventory and monitoring of the Noctuidae (Insecta: Lepidoptera) of Plummers Island, Maryland Michael Pogue, Systematic Entomology Laboratory, U.S.Department of Agriculture Sponsor: M. Alma Solis	$1,825
Suppression of Ixodes scapularis and Borrelia burgdorferi by self-application of permethrin by white-tailed deer Victoria Solberg and Earlene Armstrong, Walter Reed Army Research Institute Sponsor: Lowell W. Adams	$2,500
The Chrysomelidae (Insecta: Coleoptera) of Plummers Island, Maryland Year 2 Charles Staines, National Museum of Natural History Sponsor: Paul J. Spangler	$2,500
Effects of immunocontraception on white-tailed deer fawns Lori Thiele, University of Maryland, College Park Sponsor: Lowell W. Adams	$2,500
The relative importance of native and exotic herbaceous species in recovery from flood damage along the Potomac River at Plummers Island Elizabeth F. Wells, George Washington University Sponsor: Stanwyn G. Shetler	$750
1997 Movement and mortality patterns of translocated urban-suburban gray squirrels Lowell W. Adams (Member), and Vagn Flyger (Member)	$2,500
The reproductive ecology of the wood turtle (Clemmys insculpta) in northern Virginia Thomas S. B. Akre, George Mason University Sponsor: Roy W. McDiarmid	$2,515
BioBlitz of Chain Bridge Flats Olin Allen , District of Columbia Natural Heritage Program Sponsor: John M. Hadidian	$1,000
The effects of beaver dams on macroinvertebrate assemblages, water chemistry, and hydrology in low-order streams of western Maryland Brian Margolis and Richard Raesly, Frostburg State University Sponsor: Paul Brouha	$2,349
The relative importance of native and exotic herbaceous species in recovery from flood damage along the Potomac River at Plummers Island Elizabeth F. Wells, George Washington University Sponsor: Stanwyn G. Shetler	$1,978
Monitoring calling Orthoptera of Plummers Island and the Potomac River Basin as a means of evaluating seasonal and yearly environmental changes Samuel W. Droege, Patuxent Wildlife Research Center Sponsor: Paul J. Spangler	$2,500
A survey of the harvestmen (Arachnida, Opiliones) occurring in the vicinity of Plummers Island Arnold Norden ( Member)	$700
Inventory of tardigrades of Plummers Island Marcia Shofner, University of Maryland, College Park Sponsor: Roy W. McDiarmid	$2,209
The Chrysomelidae (Insecta: Coleoptera) of Plummers Island Charles L. Staines, National Museum of Natural History Sponsor: Paul J. Spangler	$2,500
Bioassessment of northern Virginia stream quality, using benthic macroinvertebrates Allyson Via-Norton, George Mason University Sponsor: James D. Lawrey	$2,115
1996 Amphibian, reptile, and mammal survey of Dyke Marsh, Virginia Walter Bulmer, Northern Virginia Community College Sponsor: David W. Johnston	$1,745
Vegetation Survey of the Woodbridge Unit of the Mason Neck National Wildlife Refuge Elaine Haug Sponsor: Stanwyn G. Shetler	$2,500
Movement and mortality patterns of translocated urban-surburban gray squirrels Lowell W. Adams (Member)	$2,100
Insect biodiversity of Dyke Marsh Wildlife Preserve Edward W. Barrows, Georgetown University Sponsor: David W. Johnston	$2,500
Vegetation survey of the Woodbridge Unit of the Mason Neck National Wildlife Refuge Elaine Haug, Department of Biology, Smithsonian Institution Sponsor: Stanwyn G. Shetler	$2,500
Vegetative communities of the flood plain and flood terraces in the Potomac River Gorge Chris Lea, George Mason University Sponsor: James D. Lawrey	$1,600
Life histories of slugs of Plummers Island Arnold Norden ( Member)	$900
Influence of white-tailed deer on survival and density of rare and endangered spring wildflowers in the Potomac Basin Lisa Shipley, Frostburg State University Sponsor: John M. Hadidan	$1,926
Herpetofauna of constructed forested wetland and adjacent areas T’Shaka Touré, Howard University Sponsor: Roy W. McDiarmid	$1,675
Biodiversity of the Harpacticoida (Crustacea: Copepoda) in the Potomac Basin surrounding Plummers Island Grace Wyngaard, James Madison University Sponsor: Don E. Wilson	$1,511
1995 The pollination biology of witch hazel: Hamamelis virginiana L. Stefan Sommer, University of Maryland, College Park Sponsor: Eugene.S. Morton	$1,000
Crayfish feeding behavior Robert Creed, Hood College Sponsor: John S. Gottschalk	$1,276
A radiotelemetry feasibility study to support American shad restoration in the Potomac River James D. Cummins, Interstate Commission on the Potomac River Basin Sponsor: Paul Brouha	$800
Calling station fidelity of male green tree frogs (Hyla cinerea) Sandra D’Alessandro, George Mason University Sponsor: James D. Lawrey	$1,674
Floral inventory of Diamond Lab Elaine Haug, National Museum of Natural History Sponsors: Stanwyn G. Shetler, John S. Gottschalk	$2,500
Polygonum perfoliatum : A study of biological features leading to the formation of a management polciy Judith A. Okay, George Mason University Sponsor: James D. Lawrey	$1,250
Microhabitat preference and nest survival in the spotted turtle (Clemmys guttata) Thomas Wilson, George Mason University Sponsor: James D. Lawrey	$2,500
Insect Diversity of Dyke Marsh Wildlife Preserve, Virginia Edward M. Barrows, Georgetown University Sponsor: David W. Johnston	$2,500
Inventory of fish of the waters around Plummers Island Wayne Starns, North Carolina State Museum Sponsor: James C. Tyler, II	$5,000
1994 Ecology of the eastern box turtle, Terrapene carolina Timothy Boucher, George Mason University Sponsor: James D. Lawrey	$2,475
Survey of the terrestrial mollusks of Plummers Island and the adjacent Maryland shoreline Arnold Norden (Member)	$500
Differential survivorship in juvenile snapping turtles (Chelydra serpentine) based on hatching size James C. Wilgenbusch, George Mason University Sponsors: James D. Lawrey and Thomas H. Fritts	$2,500
The effects of low pH on the upland chorus frogs, Pseudacris feriarum Kay M. Briggs, George Mason University Sponsors: James D. Lawrey and Thomas H. Fritts	$1,925
A survey of the lotic gastropods of the Potomac Basin N. Leroy Poff, Department of Zoology, University of Maryland, College Park Sponsor:	$2,450
1993 Survey of avian diversity on Plummers Island and the adjacent mainland David Johnston (Member)	$334
Census of breeding birds of the District of Columbia Jane N. Huff, Audubon Naturalist Society Sponsor: Don E. Wilson	$2,100
Foraging ecology of bats in the Potomac Basin Peter S. Miller Sponsor: Don E. Wilson	$2,405
Winter ecology of the eastern box turtle Timoth P. Boucher, George Mason University Sponsor: James D. Lawrey	$2,499
Seasonal emergence patterns and species diversity of Potomac Basin Trichoptera Richard M. Duffield, Howard University Sponsor:	$2,333
1992 An update of breeding bird populations on Plummers Island and the adjacent mainland David Johnston(Member)	$150
Lichens as long-term pollution monitors at Plummers Island James D. Lawrey (Member)	$2,630
Factors controlling local temperature variations in the Washington, D. C., urban heat island J. Michael Pendleton, George Mason University Sponsor:	$2,415
Inventory of lichen specimens of the Washington, D. C. area at the National Museum of Natural History Ellen Farr, National Museum of Natural History Sponsor: James D. Lawrey	$5,500
Seed dispersal dynamics of trout lily (Erythronium americanum) Scott Ruhren, University of Maryland, College Park Sponsor: Stanwyn G. Shetler	$2,443
1991 Fisheries survey around Plummers Island, Maryland A. Rottman, University of Maryland and Interstate Commission Potomac River Basin Sponsor: Paul Brouha	$2,500
Orchelimum nigripes and O. pulchellum in Potomac Basin: song divergence and speciation in two meadow katydids Leo Shapiro, State University of New York, Stony Brook Sponsor: Terry L. Erwin	$2,162
Biota of Dyke Marsh, Potomac River, Farifax County, Virginia Don Kelso, Xu Zhaoran, Elaine Haug, Scott Belfit, and Steve Getlein, George Mason University Sponsor: L.K. Thomas, Jr.	$7,500
A study of plant communities in the Hunting Bay area Xu Zhaoran, George Mason University Sponsor: L. Kay Thomas, Jr.	$2,500
An annotated checklist of the flora of Rock Creek Park, National Park Service, Washington, D.C. Peggy Fleming, National Park Service Sponsor: L.Kay Thomas, Jr.	$1,280
Collection of vascular plants on National Park Service lands in the coastal plains regions of the District of Columbia and nearby Maryland Stephen Syphax and Gentry Davis, National Capital Parks-East Sponsor: L.Kay Thomas, Jr.	$2,000
1990 Habitat use and movement patterns of the snapping turtle Steve W. Gotte, Fish and Wildlife Service, National Museum of Natural History Sponsor: Roy W. McDiarmid	$2,470
Collection of vascular plants within the Potomac Basin Peggy Fleming, National Park Service Sponsor: L. Kay Thomas, Jr.	$2,000
Study of nesting behavior in the wood turtle, Clemmys insculpta John McBreen, George Mason University Sponsor: Roy W. McDiarmid	$1,287
Provisioning behavior and reproductive success: the currency of fitness in a solidarity wasp Trypoxylon lactitarse (Hymenoptera: Sphecidae) Chaarma Boyde, University of Maryland, College Park Sponsor: Karl V. Krombein	$2,500
1989 An inventory of Virginia raptor specimens David W. Johnston(Member)	$500
Study of nesting behavior in the wood turtle, Clemmys insculpta John F. McBreen, George Mason University Sponsor: Roy W. McDiarmid	$1,444
The spider community of Plummers Island, Maryland Edward M. Barrows, Georgetown University, and Jonathan A.Coddington, National Museum of Natural History Sponsor: Ronald J. McGinley	$ 2,500
Collecting of vascular plants within the Potomac Basin Peggy Fleming, National Park Service, Rock Creek Park Sponsor: L.Kay Thomas, Jr.	$2,000
Identification of vascular plants in Rock Creek Park and Columbia Island Peggy Fleming, National Park Service, Rock Creek Park Sponsor: L.Kay Thomas, Jr.	$1,200
1988 Collection of vascular plants within the Potomac Basin Peggy Fleming, National Park Service, Rock Creek Park Sponsor: L.Kay Thomas, Jr.	$2,240
Survey of Acanthomoeba in the Potomac Basin Ralph P. Eckerlin, Northern Virginia Community College, and Thomas K. Sawyer, Rescon Associates, Inc. Sponsor: Alfred L. Gardner	$500
1987 Printing and reprint costs for publication sibmitted to Proceedings of the Biological Society of Washington David W. Johnston (Member)	$712
Lichens as pollution monitors in the Potomac River Basin Mason E. Hale and James E. Lawrey (Members)	$2,325
Collection of fossil ferns from the Potomac Group Judy E. Skog, George Mason University Sponsor: Dan H. Nicholson	$2,350
Collection of vascular plants within the Potomac Basin Peggy Fleming, National Park Service, Rock Creek Park Sponsor: L. Kay Thomas, Jr.	$2,499
Survey of parasites from an urban raccoon population John M. Hadidian, National Park Service, Parasitology Laboratory, Inc. Sponsor: Vagn F. Flyger	$2,000
Experimental analysis of directional selection for small body size in Acanthoscelides alboscutellatus (Coleoptera: Bruchidae), imposed by the contratints of its host plants Ludwigia alternifolia (Onagraceae) James R. Ott, University of Maryland, College Park Sponsor: Eugene S. Morton	$1,769
1986 Quantitative monitoring of airborne lead pollution by a foliose lichen: further studies David Schwartzman, Howard University Sponsor: James D. Lawrey	$2,500
Compter based inventory of the vascular plants of the District of Columbia region Stanwyn G. Shetler (Member)	$2,200
1985 Bee community of Plummers Island Ronald J. McGinley (Member)	$3,000
1984 Annotated checklist and larval keys to the Geometridae of Plummers Island Roger L. Heitzman, University of Maryland, College Park Sponsor: J. F. Gates Clarke	$2,129
Breeding bird populations of Plummers Island and intrasexual niche partititioning in the northern cardinal David W. Johnston (Member)	$660
The pollination biology of witch hazel: Hamamelis virginiana L. Stephen Sommer, University of Maryland, College Park Sponsor: Eugene S. Morton	$1,000
1983 Urban raccoons and rabies in Rock Creek Park: ecological, eipizootiological, and immunological assessment David A. Manski, National Park Service, and Victoria C. Guerrero, University of the District of Columbia Sponsor: L. Kay Thomas, Jr.	$2,000
Seed dispersal in two species of Rubus (R. allegheniensis Porter and R. flagellaris Wildenow) and implications for reproductive resource allocation George Middendorf and Muriel Poston, Howard University Sponsor: Richard S. Cowan	$2,500
The pollination biology of witch hazel: Hamamelis virginiana L. Stefran A. Sommer, University of Maryland, College Park Sponsor: E.S. Morton	$2,120
1982 The biting midges of Plummers Island Willis Wirth (Member)	$500
The structure of the flower fly (Diptera: Syrphidae) community in the Washington, D.C. area Edward M. Barrows and F. Christian Thompson, Georgetown University Sponsor: Ronald W. Hodges	$2,500
A systematic investigation of the subgenus Pseudophonus, Harpalus (Coleoptera: Carabidae), in the Potomac River Basin Brian D. Farrell, University of Maryland, College Park Sponsor: Terry L. Erwin	$564
Population dynamics of a neotropical migrant bird, the Kentucky warbler (Oporornis formosus) Eugene S. Morton (Member)	$2,004
A checklist of flowering plants and ferns of Plummers Island Stanwyn G. Shetler (Member)	$2,312
Exotic plant impact; ecology and geography of Virginia mallow; and hydrology, geomorphology, and vegetation in and around Theodore Roosevelt Island L. Kay Thomas, Jr. (Member)	$1,544
Patterns of heavy metal accumulation in lichens in the Potomac Basin Mason E. Hale and James D. Lawrey (Members)	$2,500
1981 Lichen flora of Bear Island Mason Hale (Member)and Al Skorepa, Smithsonian Institution and Towson State College	$2,356
1978 The biting midges of Plummers Island Willis W. Wirth (Member)	$2,000
Reprinting of the "Flora of the District of Columbia and Vicinity" Audubon Naturalist Society Sponsor: Stanwyn G. Shetler	$2,500
1977 Lichen project Mason E. Hale (Member)	$1,155
The biting midges of Plummers Island Willis W. Wirth (Member)	$3,740
1976 The biting midges of Plummers Island Willis W. Wirth (Member)	$3,000
Lichen growth rates Mason E. Hale (Member)	$1,155
Plummers Island Carabidae Terry L. Erwin (Member)	$540
1974 The natural history of carabid beetles on Plummers Island, Maryland Terry L. Erwin (Member)	$700
1971 Lepidoptera of Plummers Island Donald R. David (Member)	$65
Wasps of Plummers Island Karl V. Krombein (Member)	$284
1969 Lichen biology and use of lichens as indicators of environmental deterioration Mason E. Hale (Member)	$1,949
1963 Wasps of Plummers Island Karl V. Krombein (Member)	$312