Results 21 to 30 of about 439 (146)

Comparison of powdered enamel sample pretreatment methods for strontium isotope analysis

Frontiers in Environmental Chemistry, 2023
Most researchers assume minimal impact of pretreatment on strontium isotope ratios (87Sr/86Sr) for bones and teeth, and methods vary tremendously. We compared 14 pretreatment methods, including no prep other than powdering enamel, ashing, soaking in ...
Brooke Erin Crowley, Brooke Erin Crowley, Emily Michelle Bruff Simpson, Sarah Jayne Hammer, Joshua Michael Smith, Thomas Martin Johnson   +5 more
doaj   +1 more source

Frugivory and seed dispersal in the Cerrado: Network structure and defaunation effects

Biotropica, Volume 55, Issue 4, Page 849-865, July 2023., 2023
We investigated the Cerrado seed dispersal network and the potential impacts of defaunation on it by performing a systematic literature review. The Cerrado network has a heterogeneous structure, slightly nested and considerably modular, and is dominated by generalist species.
Rodrigo Béllo Carvalho, Yadvinder Malhi, Imma Oliveras Menor   +2 more
wiley   +1 more source

Empirical examples demonstrate how relational thinking might enrich science and practice

People and Nature, Volume 5, Issue 2, Page 455-469, April 2023., 2023
Abstract Interdependent relationships among humans and nature often go overlooked, delaying better environmental, social and public health outcomes. Emerging approaches have emphasized thinking through relationships, which we call ‘relational thinking’. Threads of relational thinking have matured in areas such as anthropology and Indigenous scholarship,
Harold N. Eyster, Terre Satterfield, Kai M. A. Chan   +2 more
wiley   +1 more source

Tooth marker of ecological abnormality: The interpretation of stress in extinct mega herbivores (proboscideans) of the Siwaliks of Pakistan

Ecology and Evolution, Volume 12, Issue 11, November 2022., 2022
Enamel hypoplasia is a tooth marker of ecological abnormality which can also be used in fossil animals to evaluate the likelihood of extinctions. The Siwalik paleoenvironment is being tried to assess by using teeth of the fossil proboscideans. Abstract Climate affects living ecosystems and defines species physiology.
Muhammad Ameen, Abdul Majid Khan, Rana Manzoor Ahmad, Muhammad Umar Ijaz, Muhammad Imran   +4 more
wiley   +1 more source

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

The Anatomical Record, Volume 305, Issue 10, Page 2729-2765, October 2022., 2022
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
Christopher A. Brochu, Ane de Celis, Amanda J. Adams, Stephanie K. Drumheller, Jennifer H. Nestler, Brenda R. Benefit, Aryeh Grossman, Francis Kirera, Thomas Lehmann, Cynthia Liutkus‐Pierce, Fredrick K. Manthi, Monte L. McCrossin, Kieran P. McNulty, Rose Nyaboke Juma   +13 more
wiley   +1 more source

Taxonomic and palaeobiological implications of a large, pathological sabretooth (Carnivora, Felidae, Machairodontinae) from the Lower Pliocene of South Africa

Papers in Palaeontology, Volume 8, Issue 5, September/October 2022., 2022
Abstract We describe the most complete postcranial remains of a pathological, large‐bodied sabretooth from the Lower Pliocene site of Langebaanweg ‘E’ Quarry (South Africa). The skeleton consists of hind limb and vertebral elements that exhibit distinctive exostoses, osteophytes and eburnation.
Caitlin Rabe, Anusuya Chinsamy, Alberto Valenciano, Mary Silcox   +3 more
wiley   +1 more source

How to approach the study of syndromes in macroevolution and ecology

Ecology and Evolution, Volume 12, Issue 3, March 2022., 2022
Syndromes, wherein multiple traits evolve convergently in response to a shared selective driver, form a central concept in ecology and evolution. Recent work has questioned the utility and indeed the existence of some of the classic syndromes, such as pollination and seed dispersal syndromes.
Miranda A. Sinnott‐Armstrong, Rocio Deanna, Chelsea Pretz, Sukuan Liu, Jesse C. Harris, Amy Dunbar‐Wallis, Stacey D. Smith, Lucas C. Wheeler   +7 more
wiley   +1 more source

Teeth of Past and Present Elephants: Microstructure and Composition of Enamel in Fossilized Proboscidean Molars and Implications for Diagenesis

Geochemistry, Geophysics, Geosystems, Volume 22, Issue 4, April 2021., 2021
Abstract Enamel as hardest biological tissue remains unaltered for millions of years and is therefore an excellent archive for studies on paleodiet, paleoecology, paleoclimate, paleoenvironment, biomechanical, and evolutionary studies. However, diagenetic alterations can influence such interpretations and therefore we analyzed the microstructure and ...
Nataniel Białas, Oleg Prymak, Ningthoujam Premjit Singh, Debajyoti Paul, Rajeev Patnaik, Matthias Epple   +5 more
wiley   +1 more source

Were late Gomphotheres (Plio-Pleistocene) of the Siwaliks at more Stress as Compared to early Gomphotheres (middle to late Miocene)?

Journal of Bioresource Management, 2020
Gomphotheres existed in the Siwaliks from the middle Miocene (14.2Ma) to the middle Pleistocene (0.8Ma) and became extinct later on. In this paper, we tried to discuss the reasons of such extinction of gomphotheres in the lower Pleistocene time span by considering Linear Enamel Hypoplasia (LEH) among 114 isolated tooth samples to assess whether ...
Ameen, Muhammad, Khan, Abdul Majid, Tahir Waseem, Muhammad, Ahmad, Rana Manzoor, Iqbal, Ayesha, Rafeh, Amtur, Imran, Muhammad   +6 more
openaire   +3 more sources

The Miocene: The Future of the Past

Paleoceanography and Paleoclimatology, Volume 36, Issue 4, April 2021., 2021
Abstract The Miocene epoch (23.03–5.33 Ma) was a time interval of global warmth, relative to today. Continental configurations and mountain topography transitioned toward modern conditions, and many flora and fauna evolved into the same taxa that exist today.
M. Steinthorsdottir, H. K. Coxall, A. M. de Boer, M. Huber, N. Barbolini, C. D. Bradshaw, N. J. Burls, S. J. Feakins, E. Gasson, J. Henderiks, A. E. Holbourn, S. Kiel, M. J. Kohn, G. Knorr, W. M. Kürschner, C. H. Lear, D. Liebrand, D. J. Lunt, T. Mörs, P. N. Pearson, M. J. Pound, H. Stoll, C. A. E. Strömberg   +22 more
wiley   +1 more source