Publications
Publications from USGS science centers throughout the Southeast Region.
Filter Total Items: 10351
Advancing mangrove macroecology Advancing mangrove macroecology
Mangrove forests provide a wide range of ecosystem services to society, yet they are among the most anthropogenically impacted coastal ecosystems in the world. In this chapter, we discuss and provide examples for how macroecology can advance our understanding of mangrove ecosystems. Macroecology is broadly defined as a discipline that uses statistical analyses to investigate large-scale...
Authors
Victor H. Rivera-Monroy, Michael J. Osland, John W. Day, Santanu Ray, Andre S. Rovai, Richard H. Day, Joyita Mukherjee
Concepts: Integrating population survey data from different spatial scales, sampling methods, and species Concepts: Integrating population survey data from different spatial scales, sampling methods, and species
Conservationists and managers are continually under pressure from the public, the media, and political policy makers to provide “tiger numbers,” not just for protected reserves, but also for large spatial scales, including landscapes, regions, states, nations, and even globally. Estimating the abundance of tigers within relatively small areas (e.g., protected reserves) is becoming...
Authors
Robert Dorazio, Mohan Delampady, Soumen Dey, Arjun M. Gopalaswamy
Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data Estimating discharge and nonpoint source nitrate loading to streams from three end‐member pathways using high‐frequency water quality data
The myriad hydrologic and biogeochemical processes taking place in watersheds occurring across space and time are integrated and reflected in the quantity and quality of water in streams and rivers. Collection of high‐frequency water quality data with sensors in surface waters provides new opportunities to disentangle these processes and quantify sources and transport of water and...
Authors
Matthew P. Miller, Anthony J. Tesoriero, Krista Hood, Silvia Terziotti, David M. Wolock
Timing of warm water refuge use in Crystal River National Wildlife Refuge by manatees—Results and insights from Global Positioning System telemetry data Timing of warm water refuge use in Crystal River National Wildlife Refuge by manatees—Results and insights from Global Positioning System telemetry data
Managers at the U.S. Fish and Wildlife Service Crystal River National Wildlife Refuge (CRNWR) desire to update their management plan regarding the operation of select springs including Three Sisters Springs. They wish to refine existing parameters used to predict the presence of federally threatened Trichechus manatus latirostris (Florida manatee) in the springs and thereby improve their...
Authors
Daniel H. Slone, Susan M. Butler, James P. Reid, Catherine G. Haase
An expert elicitation process to project the frequency and magnitude of Florida manatee mortality events caused by red tide (Karenia brevis) An expert elicitation process to project the frequency and magnitude of Florida manatee mortality events caused by red tide (Karenia brevis)
Red tides (blooms of the harmful alga Karenia brevis) are one of the major sources of mortality for the Florida manatee (Trichechus manatus latirostris), especially in southwest Florida. It has been hypothesized that the frequency and severity of red tides may increase in the future because of global climate change and other factors. To improve our ecological forecast for the effects of...
Authors
Julien Martin, Michael C. Runge, Leanne J. Flewelling, Charles J. Deutsch, Jan H. Landsberg
A spatial approach to combatting wildlife crime A spatial approach to combatting wildlife crime
Poaching can have devastating impacts on animal and plant numbers, and in many countries has reached crisis levels, with illegal hunters employing increasingly sophisticated techniques. Here, we show how geographic profiling – a mathematical technique originally developed in criminology and recently applied to animal foraging and epidemiology – can be adapted for use in investigations of...
Authors
Sally C. Faulkner, Michael C.A. Stevens, Stephanie S. Romanach, Peter A. Lindsey, Steven C. LeComber
Comparing catchment hydrologic response to a regional storm using specific conductivity sensors Comparing catchment hydrologic response to a regional storm using specific conductivity sensors
A better understanding of stormwater generation and solute sources is needed to improve the protection of aquatic ecosystems, infrastructure, and human health from large runoff events. Much of our understanding of water and solutes produced during stormflow comes from studies of individual, small headwater catchments. This study compared many different types of catchments during a single...
Authors
Ashley Inserillo, Mark B. Green, James B. Shanley, Joseph Boyer
Modeling the compensatory response of an invasive tree to specialist insect herbivory Modeling the compensatory response of an invasive tree to specialist insect herbivory
The severity of the effects of herbivory on plant fitness can be moderated by the ability of plants to compensate for biomass loss. Compensation is an important component of the ecological fitness in many plants, and has been shown to reduce the effects of pests on agricultural plant yields. It can also reduce the effectiveness of biocontrol through introduced herbivores in controlling...
Authors
Bo Zhang, Xin Liu, Donald L. DeAngelis, Lu Zhai, Min B. Rayamajhi, Shu Ju
eDNAoccupancy: An R package for multi-scale occupancy modeling of environmental DNA data eDNAoccupancy: An R package for multi-scale occupancy modeling of environmental DNA data
In this article we describe eDNAoccupancy, an R package for fitting Bayesian, multi-scale occupancy models. These models are appropriate for occupancy surveys that include three, nested levels of sampling: primary sample units within a study area, secondary sample units collected from each primary unit, and replicates of each secondary sample unit. This design is commonly used in...
Authors
Robert Dorazio, Richard A. Erickson
Development of a dual luciferase activity and fluorescamine protein assay adapted to a 384 micro-well plate format: Reducing variability in human luciferase transactivation cell lines aimed at endocrine active substances Development of a dual luciferase activity and fluorescamine protein assay adapted to a 384 micro-well plate format: Reducing variability in human luciferase transactivation cell lines aimed at endocrine active substances
There is a need to adapt cell bioassays to 384-well and 1536-well formats instead of the traditional 96-well format as high-throughput screening (HTS) demands increase. However, the sensitivity and performance of the bioassay must be re-verified in these higher micro-well plates, and verification of cell health must also be HT (high-throughput). We have adapted two commonly used human...
Authors
Jennifer Brennan, Donald E. Tillitt
Mangrove ecosystems under climate change Mangrove ecosystems under climate change
This chapter assesses the response of mangrove ecosystems to possible outcomes of climate change, with regard to the following categories: (i) distribution, diversity, and community composition, (ii) physiology of flora and fauna, (iii) water budget, (iv) productivity and remineralization, (v) carbon storage in biomass and sediments, and (vi) the filter function for elements beneficial...
Authors
T.C. Jennerjahn, E. Gilman, Ken W. Krauss, L.D. Lacerda, I. Nordhaus, E. Wolanski
Streamflow characteristics from modelled runoff time series: Importance of calibration criteria selection Streamflow characteristics from modelled runoff time series: Importance of calibration criteria selection
Ecologically relevant streamflow characteristics (SFCs) of ungauged catchments are often estimated from simulated runoff of hydrologic models that were originally calibrated on gauged catchments. However, SFC estimates of the gauged donor catchments and subsequently the ungauged catchments can be substantially uncertain when models are calibrated using traditional approaches based on...
Authors
Sandra Poole, Marc Vis, Rodney Knight, Jan Seibert