Division of Plant Science, University of Missouri, Columbia, MO, USA.
U.S. Geological Survey Missouri Cooperative Fish and Wildlife Research Unit, University of Missouri, Columbia, MO, USA.
Pest Manag Sci. 2017 Dec;73(12):2592-2603. doi: 10.1002/ps.4710. Epub 2017 Sep 27.
Migratory waterfowl have often been implicated in the movement of troublesome agronomic and wetland weed species. However, minimal research has been conducted to investigate the dispersal of agronomically important weed species by waterfowl. The two objectives for this project were to determine what weed species are being consumed by ducks and snow geese, and to determine the recovery rate and viability of 13 agronomic weed species after passage through a duck's digestive system.
Seed recovered from digestive tracts of 526 ducks and geese harvested during a 2-year field study had 35 020 plants emerge. A greater variety of plant species emerged from ducks each year (47 and 31 species) compared to geese (11 and 3 species). Viable seed from 11 of 13 weed species fed to ducks in a controlled feeding study were recovered. Viability rate and gut retention times indicated potential dispersal up to 2900 km from the source depending on seed characteristics and variability in waterfowl dispersal distances.
Study results confirm that waterfowl are consuming seeds from a variety of agronomically important weed species, including Palmer amaranth, which can remain viable after passage through digestive tracts and have potential to be dispersed over long distances by waterfowl. © 2017 Society of Chemical Industry.
候鸟常常被认为是具有危害性的农业和湿地杂草物种传播的媒介。然而，关于候鸟传播具有重要农业意义的杂草物种的研究很少。本项目的两个目标是确定鸭子和雪鹅所食用的杂草物种，以及确定 13 种农业杂草物种在经过鸭子的消化系统后恢复率和活力。
在为期 2 年的野外研究中，从 526 只鸭子和鹅的消化道中回收的种子有 35020 株植物发芽。与鹅（11 种和 3 种）相比，每年从鸭子中回收的植物种类更多（47 种和 31 种）。在一项受控喂养研究中，给鸭子喂食的 13 种杂草物种中有 11 种的种子具有活力。活力率和肠道保留时间表明，根据种子特征和水禽扩散距离的变化，其潜在的扩散范围可达 2900 公里。
研究结果证实，水禽正在食用各种具有重要农业意义的杂草物种的种子，包括在经过消化道后仍具有活力的豚草，并且有通过水禽进行长距离传播的潜力。 © 2017 化学工业协会。
