de.pangaea.dataset875018 und dataset PANGAEA

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https://www.pangaea.de/ information pointOfContact 2026-04-30T22:47:19Z https://doi.pangaea.de/10.1594/PANGAEA.875018 2017-05-04T12:20:06 publication https://doi.org/10.1594/PANGAEA.875018 Knott, Katrina K

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author PANGAEA

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https://www.pangaea.de/ information publisher tableDigital Supplement to: Knott, Katrina K; Christian, Amelia; Vance, Carrie Kim; Bauer, L L; Fahey, George C; Kouba, Andrew J (2017): Phenological changes in bamboo carbohydrates explain the preference for culm over leaves by giant pandas (Ailuropod melanoleuca) during spring. PLoS ONE, 12(6), e0177582, https://doi.org/10.1371/journal.pone.0177582 Seasonal changes in the foodscape force herbivores to select different plant species or plant parts to meet nutritional requirements. We examined whether the search for calorie-rich carbohydrates explained giant panda's selection for bamboo culm over leaves during spring. Leaves and culms were collected from four Phyllostachys bamboos (P. aurea, P. aureosulcata, P. glauca, and P. nuda) once per month over 18-27 months. Monthly changes in annual plant part nutrients were examined, and compared to seasonal foraging behaviors of captive giant pandas. Although total fiber was greater (p<0.0001) in culm (85.6 ± 0.5%) than leaves (55.3 ± 0.4%) throughout the year, culm fiber was at its lowest in spring (79-85%) when culm selection by giant pandas exceeded 70% of their overall diet. Culm starch also was greatest (p=0.044) during spring (5.5 ± 1.1%) and 2.5-fold the percentage of starch in leaves (2.2 ± 0.6%). The free sugars in spring culm consisted of a high proportion of glucose (35%) and fructose (47%), whereas sucrose made up 42% of the total free sugar content of spring leaves. Bound sugars in culm consisted of 60% glucose and 38% xylose likely representative of hemicellulose. The concentrations of bound sugars (hemicelluloses) in spring culms (543.7 ± 13.0 mg/g) was greater (p<0.001) than in leaves (373.0 ± 14.8 mg/g). These data help explain a long-standing question in giant panda foraging ecology: why consume the plant part with the lowest protein and fat during the energetically intensive spring breeding season? Giant pandas likely prefer spring culm that contains abundant mono- and polysaccharides made more bioavailable as a result of reduced fiber content. These data suggest that phenological changes in bamboo plant part nutrition drive foraging decisions by giant pandas. completed Knott, Katrina K

knottkk17@gmail.com

principalInvestigator copyright copyright CC-BY-3.0: Creative Commons Attribution 3.0 Unported textTable und geoscientificInformation 2008-05-01T00:00:00 2010-07-01T00:00:00 Species thematicClassification Abbreviation thematicClassification Sample type thematicClassification DATE/TIME thematicClassification Dry mass physicalMeasurement % % Organic matter physicalMeasurement % % Ash physicalMeasurement % % Dietary fiber physicalMeasurement soluble % % Dietary fiber physicalMeasurement insoluble % % Dietary fiber physicalMeasurement total % % Proteins physicalMeasurement crude protein % % Triglycerides physicalMeasurement fat, ether extraction % % Sugars physicalMeasurement free sugars, total mg/g mg/g Sugars physicalMeasurement bound sugars, total mg/g mg/g Starch physicalMeasurement %dry mass; # = 24.3/0.7 % % text/tab-separated-values unknown https://doi.pangaea.de/10.1594/PANGAEA.875018?format=textfile download dataset The data set was checked for completeness, correctness, and consistency of metainformation. Validity of used methods was checked and - if applicable - precision and range of data.