Evidence of targeted consumption of mosses by birds in sub-Antarctic South America

Evidence of targeted consumption of mosses by birds in sub-Antarctic South America
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南美洲亚南极地区鸟类有针对性地食用苔藓的证据

DOI:
10.1111/aec.12858
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发表时间:
2020
期刊:
影响因子:
1.5
通讯作者:
Jiménez, J.E.
Jiménez, J.E.
中科院分区:
环境科学与生态学4区
文献类型:
--
作者:
Russo, N.J.;Robertson, M.;MacKenzie, R.;Goffinet, B.;Jiménez, J.E.

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苔藓植物消费是罕见的鸟类物种在全球范围内,往往被认为是偶然的。我们试图确定高安第斯山脉的草食性鸟类,包括白色腹种子鹬(Attagis malouinus)和Chloephagageese(C. picta和C. poliocephala),是否消耗brabrites,如果是的话,有多频繁。我们从智利纳瓦里诺岛的高山和亚高山栖息地收集了26只种子鹬和22只鹅粪,并检查了它们的成分。我们在84.6%和90.9%的种子鹬和Chloephagoose粪便样品中分别检测到Bratonite片段。我们还从鹅粪便中分离出的三个叶绿体片段中提取了DNA,并对每个样品的三个叶绿体位点进行了测序。我们通过条形码分析推断,至少有一种Chloephagagoose消耗Polytrichum strictum和Notoligotrichum spectodon。11种鹅粪中,毛藓科苔藓碎片的含量均大于50%,表明至少有一种毛藓科的鹅粪有选择地取食毛藓科苔藓。这些新的观察结果表明,brabrites是一些高安第斯山脉鸟类饮食的一部分,鸟类可能会在亚南极地区通过动物体内传播brabrites。
Bryophyte consumption is uncommon among bird species globally and is often presumed incidental. We sought to determine whether herbivorous bird species of the high Andes, including the white‐bellied seedsnipe (Attagis malouinus) andChloephagageese (C. pictaandC. poliocephala), consume bryophytes, and if so, how frequently. We collected 26 seedsnipe and 22 goose droppings from alpine and sub‐alpine habitats of Navarino Island, Chile and examined their contents for bryophyte diaspores. We detected bryophyte fragments in 84.6% and 90.9% of seedsnipe andChloephagagoose faecal samples, respectively. We also extracted DNA from three bryophyte fragments isolated from goose droppings and sequenced three chloroplast loci for each sample. We inferred through a barcoding analysis that at least one species ofChloephagagoose consumesPolytrichum strictumandNotoligotrichum trichodon. The composition of 11 collected goose droppings was >50% Polytrichaceae bryophyte fragments, suggesting that at least oneChloephagagoose species foraged deliberately on moss species of this family. These new observations suggest that bryophytes are part of the diet of some high Andean birds and that birds might disperse bryophytes internally – via endozoochory – in the sub‐Antarctic.
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