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- W2162021105 abstract "The resilience of willow (Salix monticola Bebb, Salix geyeriana Anderss., Salix planifolia Pursh) stems released from intense elk (Cervus elaphus) browsing in Rocky Mountain National Park, Colorado, was quantified in 1998 with a retrospective study that compared biomass, number, and length of segments on willow stems located inside (protected) and outside (browsed) elk exclosures. Segment biomass increased each year after protection by about 3–12 g year−1 on browsed stems and 10–27 g year−1 on protected stems. The number of segments on stems was similar for browsed and protected stems in the first 2 years after exclusion but differed in the next 3 years, when they increased exponentially on protected stems. Nearly 80% of segments on browsed stems were < 5 cm in length in 1994–1997, which caused stems to develop a short-hedged morphology. Protected stems had more long segments and fewer short segments than browsed stems for the first 3 years, but then increased their number of short segments as stems became tall and bushy. Thus, evidence suggests short-hedged willow stems are highly resilient and can rapidly recover height and vigor after protection from intense elk browsing. Mediante un estudio retrospectivo se cuantificó la resiliencia de tallos de sauce (Salix monticola, S. geyeriana, S. planifolia) al intenso ramoneo de ciervos (Cervus elaphus), en el Parque Nacional de las Montañas Rocallosas, Colorado, USA, en el año 1998. Se comparo la biomasa, numero y longitud de segmentos de tallos de sauces localizados dentro (protegidos) y fuera de clausuras (áreas de exclusión de ciervos, establecidas en 1994), denominados ramoneados. La biomasa de los segmentos incrementó después de la protección, aproximadamente 3–12 g año−1 en tallos ramoneados y 10-27 g año−1 en tallos protegidos. En los primeros dos años de exclusión el número de segmentos fue similar en los tallos ramoneados y protegidos. En los tres años siguientes fue mayor en los protegidos debido al incremento exponencial de los mismos. Aproximadamente el 80% de los segmentos de los tallos ramoneados generados entre 1994 y 1997 tenían una longitud inferior a 5 cm, lo cual determinó que estos tallos desarrollaran un porte bajo. En los primeros tres años, los tallos protegidos tuvieron más segmentos largos y menos segmentos cortos que los ramoneados. En los años siguientes el número de segmentos cortos aumentó, conforme los tallos protegidos incrementaron su altura y ramificación. Los datos sugieren que los tallos de porte bajo sometidos a ramoneo intenso son altamente resilientes, ya que pueden recuperar su altura y vigor si son protegidos del ramoneo intenso de ciervos." @default.
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- W2162021105 date "2005-11-01" @default.
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- W2162021105 title "Resilience of Willow Stems After Release From Intense Elk Browsing" @default.
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