Jennifer H. Nestler

Cherokee Nation

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

Christopher A. Brochu

University of Iowa

Frank J. Mazzotti

University of Fort Lauderdale

Kent A. Vliet

University of Florida

Amanda N. Carr

University of Florida

Matthew H. Shirley

Florida International University

Stephanie K. Drumheller

University of Tennessee at Knoxville

Christopher M. Murray

Southeastern Louisiana University

Jennifer Ketterlin Eckles

University of Florida

Stephanie S. Romañach

United States Geological Survey

Leonard Pearlstine

National Park Service

Cooperative Institutions

University of Florida

University of Fort Lauderdale

Stony Brook University

United States Geological Survey

U.S. Geological Survey, Wetland and Aquatic Research Center

University of Iowa

National Park Service

United States Fish and Wildlife Service

Florida Fish and Wildlife Conservation Commission

National Museums of Kenya

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Author response for "Use of continuous cranial shape variation in the identification of divergent crocodile species of the genus Mecistops"

Amanda N. Carr Jennifer H. Nestler Kent A. Vliet Christopher A. Brochu Christopher M. Murray

Variation (astronomy)

Identification

10.1002/jmor.21365/v3/response1

Cite

Citations (0)

A geometric morphometric analysis of Crocodylus Niloticus

Jennifer H. Nestler

Crocodylus

10.17077/etd.tyxbmpzr

Cite

Citations (5)

Time scale in quasifission reactions

B. B. Back P. Paul Jennifer H. Nestler

The quasifission process arises from the hindrance of the complete fusion process when heavy-ion beams are used. The strong dissipation in the system tends to prevent fusion and lead the system towards reseparation into two final products of similar mass reminiscent of a fission process. This dissipation slows down the mass transfer and shape transformation and allows for the emission of high energy {gamma}-rays during the process, albeit with a low probability. Giant Dipole {gamma} rays emitted during this time have a characteristic spectral shape and may thus be discerned in the presence of a background of {gamma} rays emitted from the final fission-like fragments. Since the rate of GDR {gamma} emission is very well established, the strength of this component may therefore be used to measure the timescale of the quasifission process. In this experiment we studied the reaction between 368-MeV {sup 58}Ni and a {sup 165}Ho target, where deep inelastic scattering and quasifission processes are dominant. Coincidences between fission fragments (detected in four position-sensitive avalanche detectors) and high energy {gamma} rays (measured in a 10{close_quotes} x 10{close_quotes} actively shielded NaI detector) were registered. Beams were provided by the Stony Brook Superconducting Linac. The {gamma}-ray spectrum associated with deep inelastic scattering events is well reproduced by statistical cooling of projectile and target-like fragments with close to equal initial excitation energy sharing. The y spectrum associated with quasifission events is well described by statistical emission from the fission fragments alone, with only weak evidence for GDR emission from the mono-nucleus. A 1{sigma} limit of t{sub ss} < 11 x 10{sup -21} s is obtained for the mono-nucleus lifetime, which is consistent with the lifetime obtained from quasifission fragment angular distributions. A manuscript was accepted for publication.

10.2172/166298

Cite

Citations (0)

Author response for "Use of continuous cranial shape variation in the identification of divergent crocodile species of the genus Mecistops"

Amanda N. Carr Jennifer H. Nestler Kent A. Vliet Christopher A. Brochu Christopher M. Murray

Variation (astronomy)

Identification

10.1002/jmor.21365/v2/response1

Cite

Citations (0)

Everglades Invasive Reptile and Amphibian Monitoring Program: Summary of the First Five Years

EDIS (2017)

Rebecca G. Harvey Michael R. Rochford Jennifer Ketterlin Eckles Edward F. Metzger Jennifer H. Nestler

Lists the objectives, activities, and accomplishments of the Everglades Invasive Reptile and Amphibian Monitoring Program over its first five years and describes some ways Floridians and visitors to the state can help with the effort.

10.32473/edis-uw431-2017

Cite

Citations (0)

Giant dwarf crocodiles from the Miocene of Kenya and crocodylid faunal dynamics in the late Cenozoic of East Africa

The Anatomical Record (2022)

Christopher A. Brochu Ane de Celis Amanda Jane Adams Stephanie K. Drumheller Jennifer H. Nestler

Abstract We describe two new osteolaemine crocodylids from the Early and early Middle Miocene of Kenya: Kinyang mabokoensis tax. nov. (Maboko, 15 Ma) and Kinyang tchernovi tax. nov. (Karungu and Loperot, 18 Ma). Additional material referable to Kinyang is known from Chianda and Moruorot. The skull was broad and dorsoventrally deep, and the genus can be diagnosed based on the combined presence of a partial overbite, a subdivided fossa for the lateral collateral ligament on the surangular, and a maxilla with no more than 13 alveoli. Phylogenetic analyses based on morphological and combined morphological and molecular data support a referral of Kinyang to Osteolaeminae, and morphological data alone put the new taxon at the base of Euthecodontini. Some Kinyang maxillae preserve blind pits on the medial caviconchal recess wall. Kinyang co‐occurs with the osteolaemine Brochuchus at some localities, and together, they reinforce the phylogenetic disparity between early Neogene osteolaemine‐dominated faunas and faunas dominated by crocodylines beginning in the Late Miocene in the Kenya Rift. The causes of this turnover remain unclear, though changes in prevailing vegetation resulting from tectonic and climatic drivers may provide a partial explanation.

Neogene

10.1002/ar.25005

Cite

Citations (13)

Time scale of quasifission from giant dipole resonance γ-ray yield

Physical Review C (1995)

Jennifer H. Nestler B. B. Back Klaus Stefan Drese David Jonathan Hofman S. Schadmand

Giant dipole resonance (GDR) \ensuremath{\gamma} rays were measured in coincidence with reaction fragments in $^{58}\mathrm{Ni}$${+}^{165}$Ho at 368 MeV where deep inelastic scattering and quasifission dominate the reaction. The \ensuremath{\gamma} spectrum associated with deep inelastic scattering events is well fitted by statistical cooling of projectile and target-like fragments with close to equal initial energy sharing. The \ensuremath{\gamma} spectrum associated with quasifission events is well described by statistical emission from the fission fragments alone, with only weak evidence for GDR emission from the mononucleus. A 1\ensuremath{\sigma} limit of \ensuremath{\tau}\ensuremath{\le}11\ifmmode\times\else\texttimes\fi{}${10}^{\mathrm{\ensuremath{-}}21}$ s is obtained for the mononucleus lifetime which is consistent with the lifetimes obtained from quasifission fragment angular distributions.

Giant resonance

10.1103/physrevc.51.2218

Cite

Citations (6)

New Crocodylomorph Material from the Fayum Depression, Egypt, Including the First Occurrence of a Sebecosuchian in African Late Eocene Deposits

Journal of Vertebrate Paleontology (2019)

Candice M. Stefanic Jennifer H. Nestler Erik R. Seiffert Alan H. Turner

During the Cretaceous and Paleogene periods, the Earth experienced tectonic and climatic changes, which included continental drift following the breakup of the supercontinents Gondwana and Laurasia, the end-Cretaceous mass extinction event, and several climatic events, including the Paleocene–Eocene Thermal Maximum and the Middle Eocene Climatic Optimum. In response to increased temperatures and vacancies of ecospace left by the extinction of non-avian dinosaurs, mammal and reptile lineages that survived into the Eocene underwent immense evolutionary radiations that led to the diversification of crown clades, such as Crocodylia. Late Eocene deposits in northern Africa provide insights into how crocodyliforms responded to these tectonic and climatic events. Specifically, the Birket Qarun Formation in the Fayum Depression of Egypt contains several species of crown crocodylians as part of its rich fossil record of vertebrates. This study provides description of new material attributable to crocodylian taxa previously known from this formation, as well as newly recognized non-crocodylian mesoeucrocodylian material referable to Sebecosuchia. The sebecosuchian material provides important evidence attesting to the diversity of crocodyliforms in the late Eocene of Africa and expands the known biogeographic range of sebecosuchians.

Paleogene

Extinction (optical mineralogy)

Mammal

10.1080/02724634.2019.1729781

Cite

Citations (9)

The Everglades vulnerability analysis—Integrating ecological models and addressing uncertainty

Fact sheet (2021)

Laura E. D’Acunto Stephanie S. Romañach Saira M. Haider Caitlin Hackett Jennifer H. Nestler

First posted July 28, 2021 For additional information, contact: Director, Wetland and Aquatic Research Center U.S. Geological Survey 7920 NW 71st St. Gainesville, FL 32653Contact Pubs Warehouse The Everglades vulnerability analysis (EVA) is a project led by the U.S. Geological Survey in cooperation with the National Park Service and U.S. Army Corps of Engineers to accomplish one of the science goals of Restoration Coordination & Verification (RECOVER), a multiagency group responsible for providing scientific and technical evaluations and assessments for improving the ability of the Comprehensive Everglades Restoration Plan to restore, preserve, and protect the south Florida ecosystem while providing for the region’s other water-related needs. In 2016, RECOVER acknowledged the need for a tool that could synthesize the decades of Everglades ecosystem science and identify areas vulnerable to changing conditions on the landscape. The EVA tool answers this need through a landscape-scale modeling framework that provides annual responses and relative vulnerability for a suite of indicators of Everglades ecosystem health.

Vulnerability

Geological survey

10.3133/fs20213033

Cite

Citations (2)

Near-term spatial hydrologic forecasting in Everglades, USA for landscape planning and ecological forecasting

Environmental Modelling & Software (2020)

Leonard Pearlstine James M. Beerens Gregg Reynolds Saira M. Haider Mark McKelvy

Operational ecological forecasting is an emerging field that leverages ecological models in a new, cross-disciplinary way – using a real-time or nearly real-time climate forecast to project near-term ecosystem states. These applications give decision-makers lead time to anticipate and manage state changes that degrade ecosystem functions or directly impact humans. The Everglades Forecasting model (EverForecast) is an operational forecast model designed specifically for conservation management purposes including water management. It provides up to six-month forecasts of daily projected, spatially continuous stage values across the Everglades. We validated EverForecast quarterly to measured historical values at 207 gages (Jan 1, 2000–Dec 31, 2019). The EverForecast hindcasts of water stage accurately captured measured stage variation, with a low percentage of measured stages exceeding hindcasted values. Over the whole spatial extent, the mean RMSE is 20.98 cm, the mean MAE is 14.42 cm, and the mean MBE is 0.91 cm.

10.1016/j.envsoft.2020.104783

Cite

Citations (12)