Publications
Explore WARC's science publications.
Filter Total Items: 3377
IPANE: Could New England's Early Detection Network benefit eastern Canada?
The Invasive Plant Analysis of New England (IPANE: ipane.org) is a multifaceted approach to regional early detection of invasive plants. IPANE, was founded in 2001 to create a comprehensive six state New England regional partnership to: minimize the ecological damage caused by invasive plants; provide reliable and accessible educational material; maintain a network of professional and trained volu
Authors
Les Mehrhoff, Randy G. Westbrooks
Alligators and crocodiles as indicators for restoration of Everglades ecosystems
Alligators and crocodiles integrate biological impacts of hydrological operations, affecting them at all life stages through three key aspects of Everglades ecology: (1) food webs, (2) diversity and productivity, and (3) freshwater flow. Responses of crocodilians are directly related to suitability of environmental conditions and hydrologic change. Correlations between biological responses and env
Authors
Frank J. Mazzotti, G. Ronnie Best, Laura A. Brandt, Michael S. Cherkiss, Brian M. Jeffery, Kenneth G. Rice
Defining winter trophic habitat of juvenile Gulf Sturgeon in the Suwannee and Apalachicola rivermouth estuaries, acoustic telemetry investigations
Three automated listening post-telemetry studies were undertaken in the Suwannee and Apalachicola estuaries to gain knowledge of habitats use by juvenile Gulf Sturgeons (Acipenser oxyrinchus desotoi) on winter feeding grounds. A simple and reliable method for external attachment of small acoustic tags to the dorsal fin base was developed using shrink-tubing. Suspending receivers on masts below anc
Authors
K. J. Sulak, M.T. Randall, R. E. Edwards, T.M. Summers, K.E. Luke, W.T. Smith, A.D. Norem, William M. Harden, R.H. Lukens, F. Parauka, S. Bolden, R. Lehnert
Variable growth and longevity of yellow bullhead (Ameiurus natalis) in the Everglades of south Florida, USA
Yellow bullhead (Ictaluridae: Ameiurus natalis) is the most abundant ictalurid catfish in the Everglades of southern Florida, USA, and, as both prey and predator, is one of many essential components in the ecological-simulation models used in assessing restoration success in the Everglades. Little is known of its biology and life history in this southernmost portion of its native range; the presen
Authors
D.J. Murie, D.C. Parkyn, W.F. Loftus, L.G. Nico
Coral disease following massive bleaching in 2005 causes 60% decline in coral cover on reefs in the US Virgin Islands
In the northeast Caribbean, doldrum-like conditions combined with elevated water temperatures in the summer/fall 2005 created the most severe coral bleaching event ever documented within this region. Video monitoring of 100 randomly chosen, permanent transects at five study sites in the US Virgin Islands revealed over 90% of the scleractinian coral cover showed signs of thermal stress by paling or
Authors
J. Miller, E. Muller, C. Rogers, R. Waara, A. Atkinson, K.R.T. Whelan, M. Patterson, B. Witcher
Relationship between body condition of American alligators and water depth in the Everglades, Florida
Feeding opportunities of American alligators (Alligator mississippiensis) in freshwater wetlands in south Florida are closely linked to hydrologic conditions. In the Everglades, seasonally and annually fluctuating surface water levels affect populations of aquatic organisms that alligators consume. Since prey becomes more concentrated when water depth decreases, we hypothesized an inverse relation
Authors
Ikuko Fujisaki, Kenneth G. Rice, Leonard G. Pearlstine, Frank J. Mazzotti
Is there evidence of adaptation to tidal flooding in saplings of baldcypress subjected to different salinity regimes?
Plant populations may adapt to environmental conditions over time by developing genetically based morphological or physiological characteristics. For tidal freshwater forested wetlands, we hypothesized that the conditions under which trees developed led to ecotypic difference in response of progeny to hydroperiod. Specifically, we looked for evidence of ecotypic adaptation for tidal flooding at di
Authors
K. W. Krauss, T.W. Doyle, R.J. Howard
Age, differential growth and mortality rates in unexploited populations of Florida gar, an apex predator in the Florida Everglades
Florida gar, Lepisosteus platyrhincus DeKay, were sampled in two canal systems in south Florida during 2000-2001 to estimate age, growth and mortality as part of the Everglades ecosystem-restoration effort. Tamiami (C-4) and L-31W canal systems had direct connections to natural wetlands of the Everglades and harboured large Florida gar populations. Of 476 fish aged, maximum ages were 19 and 10year
Authors
D.J. Murie, D.C. Parkyn, L.G. Nico, J.J. Herod, W.F. Loftus
Hurricane Katrina sediment slowed elevation loss in subsiding brackish marshes of the Mississippi River delta
Although hurricanes can damage or destroy coastal wetlands, they may play a beneficial role in reinvigorating marshes by delivering sediments that raise soil elevations and stimulate organic matter production. Hurricane Katrina altered elevation dynamics of two subsiding brackish marshes in the Mississippi River deltaic plain by adding 3 to 8 cm of sediment to the soil surface in August 2005. Soil
Authors
K.L. McKee, J. A. Cherry
Integrated analysis of PALSAR/Radarsat-1 InSAR and ENVISAT altimeter data for mapping of absolute water level changes in Louisiana wetlands
Interferometric Synthetic Aperture Radar (InSAR) has been used to detect relative water level changes in wetlands. We developed an innovative method to integrate InSAR and satellite radar altimetry for measuring absolute or geocentric water level changes and applied the methodology to remote areas of swamp forest in coastal Louisiana. Coherence analysis of InSAR pairs suggested that the HH polariz
Authors
J.-W. Kim, Z. Lu, H. Lee, C. K. Shum, C.M. Swarzenski, T.W. Doyle, S.-H. Baek
Identification guide to skates (Family Rajidae) of the Canadian Atlantic and adjacent regions
Ecosystem-based management requires sound information on the distribution and abundance of species both common and rare. Therefore, the accurate identification for all marine species has assumed a much greater importance. The identification of many skate species is difficult as several are easily confused and has been found to be problematic in both survey data and fisheries data collection. Ident
Authors
Kenneth J. Sulak, P. D. MacWhirter, K.E. Luke, A.D. Norem, J.M. Miller, J.A. Cooper, L.E. Harris
Age, growth, mortality, and reproduction of Roughtongue bass, Pronotogrammus martinicensis 9Serranidae), in the northeastern Gulf of Mexico
The inaccessibility of outer continental shelf reefs has made it difficult to investigate the biology of Pronotogrammus martinicensis, a small sea bass known to be numerous and widely distributed in such habitat. This study takes advantage of a series of cruises in the northeastern Gulf of Mexico that collected 1,485 individuals. Fish were collected over or in the vicinity of reef habitats with ho
Authors
Richard S. McBride, Kenneth J. Sulak, Paul E. Thurman, Adam K. Richardson