Regeneration data of bryophyte fragments extracted from feces of Chloephaga picta and Attagis malouinus in Navarino Island, sub-Antarctic Chile

Birds are known to act as potential vectors for the exogenous dispersal of bryophyte diaspores. Given the totipotency of vegetative tissue of many bryophytes, birds could also contribute to endozoochorous bryophyte dispersal. Research has shown that fecal samples of the upland goose (Chloephaga picta) and white-bellied seedsnipe (Attagis malouinus) contain bryophyte fragments. Although few fragments from bird feces have been known to regenerate, the evidence for the viability of diaspores following passage through the bird intestinal tract remains ambiguous. We evaluated the role of endozoochory in these same herbivorous and sympatric bird species in sub-Antarctic Chile. We hypothesized that fragments of bryophyte gametophytes retrieved from their feces are viable and capable of regenerating new plant tissue. Eleven feces samples containing undetermined moss fragments from C. picta and A. malouinus, six moss fragment samples from wild collected mosses (Conostomum tetragonum, Syntrichia ...

已知鸟类可作为苔藓植物繁殖体（diaspores）外源传播的潜在载体。鉴于许多苔藓植物营养组织具有全能性，鸟类也可能参与苔藓植物的动物体内传播（endozoochory）。研究表明，高地鹅（Chloephaga picta）和白腹沙锥（Attagis malouinus）的粪便样本中含有苔藓植物碎片。尽管已知仅有少量鸟类粪便中的碎片能够再生，但苔藓植物繁殖体通过鸟类肠道后仍具有活力的证据尚不明确。我们评估了动物体内传播在智利亚南极地区这些同种食草且同域分布的鸟类中的作用。我们假设，从其粪便中提取的苔藓植物配子体（gametophytes）碎片具有活力，能够再生出新的植物组织。11份含有未鉴定苔藓碎片的粪便样本来自C. picta和A. malouinus，6份苔藓碎片样本来自野外采集的苔藓（Conostomum tetragonum、Syntrichia...