Effects of climate on dental mesowear of extant koalas and two broadly distributed kangaroos throughout their geographic range

Autor: Lindsay Williams, Jagger Alexander, Austin S. Frank, Phyllis S. Johnson, John Matthew Martin, Larisa R.G. DeSantis, Eva M. Biedron
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
Atmospheric Science
Teeth
Climate
Population Dynamics
lcsh:Medicine
Macropus fuliginosus
01 natural sciences
Geographical Locations
Medicine and Health Sciences
lcsh:Science
Marsupial
Mammals
Multidisciplinary
Geography
Eukaryota
Macropus giganteus
Plants
Vertebrates
Anatomy
Phascolarctidae
Research Article
010506 paleontology
Kangaroos
Oceania
Zoology
Biology
010603 evolutionary biology
Mesowear
Marsupials
Meteorology
Phascolarctos cinereus
stomatognathic system
biology.animal
Animals
Grasses
Herbivory
Macropodidae
0105 earth and related environmental sciences
Nutrition
Herbivore
lcsh:R
Organisms
Australia
Biology and Life Sciences
Humidity
15. Life on land
biology.organism_classification
Diet
stomatognathic diseases
Jaw
Tooth wear
Amniotes
People and Places
Earth Sciences
lcsh:Q
Tooth Wear
Digestive System
Head
Zdroj: PLoS ONE
PLoS ONE, Vol 13, Iss 8, p e0201962 (2018)
ISSN: 1932-6203
Popis: Dental mesowear analysis can classify the diets of extant herbivores into general categories such as grazers, mixed-feeders, and browsers by using the gross wear patterns found on individual teeth. This wear presumably results from both abrasion (food-on-tooth wear) and attrition (tooth-on-tooth wear) of individual teeth. Mesowear analyses on extinct ungulates have helped generate hypotheses regarding the dietary ecology of mammals across space and time, and recent developments have expanded the use of dental mesowear analysis to herbivorous marsupial taxa including kangaroos, wombats, possums, koalas, and relatives. However, the diet of some of the most ubiquitous kangaroos (e.g., Macropus giganteus) along with numerous other species cannot be successfully classified by dental mesowear analysis. Further, it is not well understood whether climate variables (including precipitation, relative humidity, and temperature) are correlated with dental mesowear variables including various measures of shape and relief. Here, we examine the relationship between dental mesowear variables (including traditional methods scoring the sharpest cusp and a new potential assessment of multiple cusps) and climate variables in the grazers/mixed feeders Macropus giganteus and Macropus fuliginosus, and the obligate browser Phascolarctos cinereus. We find that dental mesowear of mandibular teeth is capable of differentiating the dietary habits of koalas and the kangaroo species. Furthermore, both Macropus giganteus and Phascolarctos cinereus exhibit mesowear correlated with mean minimum temperature, while Macropus fuliginosus dental mesowear is unaffected by temperature, despite significant differences in mean minimum and mean maximum temperature across their distribution (and in the specimens examined here). Contrary to expectations that individuals from drier regions would have blunter and lower relief teeth, dental mesowear is unrelated to proxies of relative aridity-including mean annual precipitation and relative humidity. Collectively, dental mesowear in these marsupials is related to feeding behavior with increased wear in cooler regions (in Macropus giganteus and Phascolarctos cinereus) potentially related to more or different food resources consumed.
Databáze: OpenAIRE
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