Contributions in geographical exploration . > .- ^- m^ j^miH*^ Photograph by Robert F. Griggs A BEAR TRAIL THAT SPROUTED, The depressions in the tracks of the heavy animal caught wind-borne seeds, which drifted across the smooth surface round about without finding any place of lodgment. April, 1919] Beginnings of Reirgctation by someone who had walked across the area and pressed afew seeds down into the soil with his foot! For nearly twoweeks after these seeds were planted, moreover, there had beenno hard blows, but considerable rain and mist, so that they maybe said to have had as fav
Contributions in geographical exploration . > .- ^- m^ j^miH*^ Photograph by Robert F. Griggs A BEAR TRAIL THAT SPROUTED, The depressions in the tracks of the heavy animal caught wind-borne seeds, which drifted across the smooth surface round about without finding any place of lodgment. April, 1919] Beginnings of Reirgctation by someone who had walked across the area and pressed afew seeds down into the soil with his foot! For nearly twoweeks after these seeds were planted, moreover, there had beenno hard blows, but considerable rain and mist, so that they maybe said to have had as favorable an opportunity for * ig hold as could have been given them under the climatic i ns of the region. The same conditions are held responsible for the fringe ofseedlings found along the outwash deposited by temporarystreams. (See page 333). Seeds buried in the outwash. Photograph by Jasper D. Sayre THE SAME BEAR TRAIL A YEAR a somewhat different The grasses in the track have made notai>iegrowth, but no new plants have started in the general surface of the asb,although the horsetail in the background, probably a survival, has consid-erably extended its runners. deposits were protected from the wind and given favorableconditions for germination in situations where none had caughthold on the ground surface of the ash. Similar less striking, were found at Kodiak. (Sec the first pai>erof this series, page 51). In 1917 further striking natural demonstration of theinability of seeds to lodge in the general surface of the ashwas supplied b}- the discovery of several bear trails that hadsprouted. The depressions made by the animals tracksin the soft mud had served to arrest numerous wind blown 338 The Ohio Journal of Science [Vol. XIX, No. 6, seeds which otherwise w^ould have drifted clear across thebarren flats wit
Size: 2099px × 1191px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, bookpublishercolum, bookyear1920
